Vortec heads max hp. 550 inch with no machining required.

Vortec heads max hp . At this point, you may have more invested in a set of production iron heads than it would cost to buy a good set of Edelbrock or even TFS aluminum heads, so the goal should be carefully evaluated. Test 15-COMP 1. Jun 5, 2020 · A pair of these heads are perhaps among the most affordable heads that can push a small-block well into the 400 hp zone. Somehow I feel much safer with Summit, and they actually list a 0. Nov 15, 2011 · But there are still cams that would be an upgrade. The HP difference is 25 more HP ONLY. This is probably the best cylinder head casting that Chevrolet has ever produced for a production small block Chevy. 480 inch the engine should easily make 425 hp or more. 5:1 Magnum roller tip rockers, and Edelbrock Performer RPM "Air Gap" manifold and made lots of extra power. The conclusion was that swapping from peanut port to Vortec heads provided modest power gains. Any other casting numbers are not a “vortec” head. It's possible to push 1000 HP from a 5. 501-. 257 x 239 x 8=491hp potentially now figure about 90% efficiency is about max for most street combos and we get a reasonable figure around 442hp to shoot at, lets look at some combos, You’re obviously not going to make a max horsepower effort with a 350 Chevy budget build. Based on information from different cylinder head porters, they feel that you could pick up an easy 20-25 hp by modifying the exhaust side just in the area directly under the exhaust Mar 5, 1999 · Vortec heads were used exclusively in trucks and SUV's. Carburetor: Holley 750 Heads: GM L31 Vortecs Intake: Edelbrock Performer RPM Vortec Jun 22, 2007 · Comp Cams' Nitrous HP NX288R grind (236/248 degrees at 0. 0L Vortec MAX is a high-output version of the standard 6. 3 will make about 320 HP. 73 gears Feb 7, 2006 · I agree with everything these guys said, but I believe that your hp numbers will be quite a bit higher with the vortec heads-more into the 340-350hp range if you use a good intake, carb, headers and ignition. Howard's #180225-12 . The engine specs and information listed below is for the stock L76 truck engine. 0045" and nice 12-20 RA bore We know cylinder head porters who claim they can pull another 35 to 40 hp out of a stock iron Vortec head with work only on the exhaust side. 422 HP From A Budget Vortec Head/HOT Cam 355ci Mouse. Any experience? Thanks for any feedback, pursuing step one in the next month and have a buddy with a chassis dyno, so I might have some numbers to post. Aug 17, 2022 · 10. The EFI system comes complete with a black Pro-Flo XT intake manifold and 29 Lb/Hr injectors capable of 450 HP with 58 p. 1. If there's photos to be had of sawed-apart L-29 heads, I'd love to see them, too. the 520 head should be the swirl port. The roller cam you bought will likely make power sooner than the solid you had. I believe the as-cast flow is is 226 at . max lift for hydraulic roller camshafts, 3/8 in. Mar 27, 2016 · He had it bored, balanced with forged pistons. I have a free set of vortec heads that need a good cleanup and valve job that ill be Jan 23, 2016 · Typically, the max lift of stock Vortec heads is about . 020 in. 0L engine. 500 reach plugs or R44LTS for . 475" max lift. exhaust valves, valve springs with . Dyno engine (with the usual lack of accessories) 224@. A 28 HP increase over the stock heads, and the 305 engine now has close to 300 HP. you`ll also need the vortec intake that matches from elelbrock. 510 Intake . 041-inch thick head gasket on a 350ci engine, the Vortec head will bump the compression to around 9. 6:1 rockers: Dec 9, 2005 · I saw this while researching Vortec heads and decided I would share with the group. Easy 430-440 HP. now making 310 at rear wheels. Sep 22, 2006 · 447 HP Vortec Small-Block Build - Budget Sledgehammer. s. i think i would have went with different heads than the vortec and now i am saving up for the AFR 190's. 65@125mph 406 with home ported Dart 215 heads. 3 Vortec engine has aluminum cylinder heads with an iron block and runs on gasoline. 470” valve lift without binding. Mar 20, 2011 · Its already a Vortec so you have the Vortec heads. I can't recall the exact head but they were iron darts, solid roller cam and a twin Gemini plate. These numbers are made with 87 octane, while most of the combos on my site used 92 or 93 octane gasoline. The 350 will make as much power as the 400 just at a higher RPM. I would like to use the short block as is with the flat top heads. Dec 19, 2012 · The vortec heads will only support so much HP like Tech already mentioned. It does require a Vortec specific intake tho. Part Number: SUM-151124 Estimated Ship Date: Monday 4/7/2025 Dec 27, 2014 · We got a 383 with a set with a small roller . 94 valve head gained literally 1 second on my model a. A good aftermarket cast crankshaft. 600 lift max for the best bang for your buck. IV engine based off the LS2 , which was also produced both as a car engine and a truck engine. The Vortec heads also flow dramatically better than your existing heads. I bought a salvage yard vortec, ported the heads, added a 230/230 480/480 hyd roller, air gap with a qjet on an adapter plate. With a roller cammed 383 and some compression maybe you could break the 500 HP mark, maybe. Apr 6, 2018 · The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. I asked the question twice and still didn't get a real answer and now the the tread is so diluted I doubt that I ever will! Apr 28, 2012 · One of the car mags (I think CC) had a 355 build called "Danger Mouse" using vortec heads, RPM airgap, Comp Cam Extreme Energy, 1. HOT ROD Aug 12, 2002 · Replaced stock cylinder heads with World Products 305 S/R Torquer heads. 4 days ago · Assembled cylinder heads use 2. 500 lift which equates to a rough maximum HP of 470 in a 10:1 350 engine. If the head swap alone is worth somewhere between 25-50hp that sounds like a pretty good deal. 600 Valve Size: 2. 5 to 1 compression ratio and . Cheaper to just put a cam in it with . Jan 9, 2008 · The Vortec heads will make 400 hp easily. R44TS for stock iron heads that use . cam and stock rocker arms it to the tune of 550 wheel HP and had 6 speed and 373 The 185 Vortec has taken the Vortec head to the next level. a nice set of 4032 forged pistons with 1. Stab a Comp Cams XE274 or equivalent into it (its a roller engine so many choices), put GM beehive springs or machine valve guide bosses on head to accomodate higher lift of cam, get an Edelbrock RPM vortec manifold, 750 carb of your choice. Start over with a 350 block and use the L31 vortec heads I see a 96-98 350 vortec long block out of 1/2 ton 4x4 for $125 I think it makes pretty decent power as a stock motor, but with the same cam, intake and carb upgrade it would produce more HP, less MPG about the same idle. A good stock head, such as GM's iron Vortec castings, will measure around 160cc, but can make more power. 257 x max air flow x cylinders=potential hp) so . May 3, 2008 · 190hp is the absolute max hp attainable. max lift for hydraulic flat tappet camshafts or . 3L vortec carbed with ignition box is hard to beat for simple, reliable 300 hp stock. 030 over; Comp 266HR . Jun 29, 2010 · There is a local shop here that claims they are building 515 hp non ported vortec headed motors with flat tops I think it's an inflated number but they claim they are doing it. Jan 6, 2012 · If they get 1 hp per cu. 50 valves), COMP 1. btw Ill save you some trouble , the vortec head combo,s are #73,78,83,84,89,99,108,109 and #109 makes the most hp!(but also notice the vortec heads were modifyied for a . Mar 29, 2011 · All I wanted to know is wether the swirl port heads had valve lift restrictions due to guide to retainer clearances like the vortec head. 6 rockers and a 750 carb that made around 409 hp. 300 HP with headers,750 carb is a breeze with this setup. 450 to 0. 200 165 . 500 in. 470 but I'm going to be putting on beehive springs to replace the stock springs. That's what 40 years of cylinder head development will get you. So this might add another 10 to 15 hp with the Vortec heads and now that 350 hp baseline is now closer to 375 to 380 hp—or roughly a gain of 25 to 30 hp! Jul 1, 2003 · the one thing youll find out is high hp engines require good cylinder heads and a matching cam, i can,t think of a much bigger or more comon mistake that trying to build max performance while restricting the engines potential with stock heads a rough formula/gauge to guess the hp potential from the cylinder heads flow numbers is (. its got 4 valve relief flat tops, comp 270 cam . 89” intake and 1. in. From 2002-2005, the engine was referred to as the ‘HO 6000‘. 050 duration and lift of around 0. 030 Manley 5. 520/0. 055/1. It has a 9. screw-in studs, and guide plates. The lq4 has dish pistons that give it a 9. They feature a larger 185cc intake port volume, come with screw in studs, more lift ability, and larger valves than the OEM Vortecs. 100 121 . May 29, 2011 · I would advise against max hp in favor of building for max torque in the 3,500 rpm range. 50 valves OR Edlebrock EDL-5089 The goal: cruiser, pump gas, max hp/tq and May 3, 2018 · For marketing purposes, the L76 truck engine was known as the Vortec Max. 510 lift, stock rockers and push rods knock off air gap 600 holley vacuum secondary 1 1/2" shorty headers (open at the track) jegs 10" stall 2700-3000 ( brake stalls to 3200 rpms) th350 tranny 2. Jan 28, 2014 · The 059 L30/305 Vortec heads are about the best iron OEM 305 head out there now. 9. 700-362 Summit Performance Vortec cylinder heads have what it takes to get the job done Jun 21, 2012 · If you do decide to go to vortec heads and you like options. May 5, 2014 · You might want to consider ditching the OEM Vortec heads and look into teh CPP(Chev Performance Parts) Vortec Bowtie Smallport heads. 60 swirl polished exhaust valves Hardened push rods. They can flow about 220cfm @ . 500", 108 LSA,104 ICL, decent dyno headers. 11-27-02 07:00 AM - Post# 137986 WHAT ARE THE APPROXIMATE HP/TQ LIMITS for VORTEC HEADS? well lets look at it! approximate potential hp is found by this formula (. ] Jan 28, 2014 · Depending on what Vortec heads you can find, some are definitely worth looking into if you're planning on bumping up the horsepower. Overall, the Vortec heads are a much better design. small-block Vortec heads if you're Jun 8, 2018 · Looking for help in a few things for a first build. Bigger runner and bigger valves mean more power! Just ask dirt track racer Shawn Guffey, who has won every race and back to back track championships since installing Vortec heads on his A Hobby ride. The cam in the TBI engine is just plain AWFUL. motor is a 30 over dish piston , 93 truck motor with a 420/440 lift cam, 1. GM L-31 Vortec (Cast Iron) GMPP ‘small port’ Vortec Bowtie (Cast Iron) GMPP ‘large port’ Vortec Bowtie (Cast Iron) GMPP ‘Fast Burn’ (Aluminum) Edelbrock E-Tec 170 (Aluminum) 170cc I have seen and witnessed 355 cubic inches produce 440 HP with heads less than these (Vortec heads). 6 rockers, airgap intake, and a 750 holley. Jun 1, 2012 · Check out this 606hp Chevy 383ci Small Block motor using iron Vortec heads built by Randy and Rick Ferbert for the Engine Masters Challenge - Popular Hot Rodding Magazine cast-iron heads Mar 29, 2011 · The RHS pro torker (vortec style) is a great iron head, and if i were going with a smaller cc runner like the 170's then i would probably buy a set of them. The L76 is a Gen. 550 inch with no machining required. What is a good cam for a stock 350? Choosing a good cam for a stock 350 involves finding one that balances performance gains and driveability. Even better w/ 1. 298 HP @ 5,500 rpm. Jan 11, 2018 · right now i just have some smogger crate heads @76cc to break it in till i found some better heads. Aug 16, 2024 · A high flow 195cc alloy head will go to max 6500rpm on a 350 cuin Same as above goes to max 6200 on a 400 cuin If u use a smaller head thats on thee smaller side u just need more cam to achieve a certain target hp A correct cyl head combo will make the most Torque /Hp for a specific cam /cuin A vortec iron head might be a good start Sep 18, 2008 · Test 14-GMPP Vortec heads: Max 435 tq, 409 hp Avg 413 tq, 330 hp Installed GMPP Vortec iron heads (Scoggin-Dickey Performance Center PN SD8060A: 64cc chambers, 170cc intake runner volume, 1. 5mm and 3. I'd use Keith Black hypers, #KB168-030, hung on Scat Pro Stock 5. 500-inch valve lift Jul 18, 2014 · Vortec 454, stock heads, but idk what the stock lift limits are. Mar 1, 1999 · At peak, the Vortec combo made 324. 257 x flow at Apr 15, 2013 · Speed is correct on the intake. This head has been redrilled for earlier intake manifold to bolt up. What Chevrolet did on the Vortec head is extend the length of the valve tip above the valve spring retainer and then used what is called a guided rocker arm. Feb 21, 2011 · L29 Vortec 63/49 121/91 165/120 198/133 226/140 242/142 AFR 195 - / - 132/108 198/156 240/178 260/190 262/194 Even the cheapie vortec head kills the fueler heads. May 1, 2016 · As tested with Vortec heads, this cam made 409 lb-ft at 4,000 rpm and 372 hp at 5,400. 450. 600 lift is too much for the performance that I think I will get from them. This was based on a basic 350ci small-block that used high-quality parts to make this kind Vortec heads, and a Sep 6, 2021 · While compression helps, the Vortecs also improve airflow which the above example does not address. 0L L76 Vortec Max truck engine, specifically. however, if i were to do it all over i would not get the vortec heads. 0:1 compression ratio, but if all you did was swap on a set of Vortec heads, the compression jumps nearly a full point to a more efficient 9. 5, 1. 0-9. Jul 12, 2016 · The 1996-2000 350ci Vortec 5700 engines enjoy lots of aftermarket support to help improve the 255 hp and 330 lb-ft of torque they're rated for at the crank. The raised intake ports of the vortec heads is one of the things that makes them better. Stock out-of-the-box Vortec heads have approx. 540 valve lift, 113-degree lobe separation) is optimized for nitrous oxide. Hoping for 350 hp and a flat torque curve of 350 or more if possible with a static cr of 9. 3 always used the name, and many said so on the valve covers, but the Real vortec heads only came on the 96 and later vehicles. 2004 Motor - '99 4. I built the exact combo but in a 383 using a one step larger cam and a 800 carb. since they used cams with lift in excess of the max . 42 rear gear , on a chassis dyno it made 380 hp and that was before we tune it , and we are going for all torque , have another friend that has a 406 in a stock 91 camaro stock rod running a set of stock vortecs with a comp 282 sl cam about 10-1 compression ran a 7. 050" duration, *112 lobe spacing from their "Max Factory" line of cams would be a step up from stock, and should work with the stock Vortec heads. These springs increase the amount of available valve lift from 0. 500-341. 7" rods. 065"/1. Aug 13, 2008 · 422 HP From A Budget Vortec Head/HOT Cam 355ci Mouse By Jeff Smith Some things are difficult to improve. Oct 2, 2008 · Max hp 665 Max tq 593 intake. The downside is supposedly finding good castings is hard, although I have had no problem in this regard. Cam Specs: Cam Type: Roller. Apr 17, 2016 · The stock Vortec cam is similar in timing to GM's old 300 HP cam,but,with some added lift,combined the benefits of a roller cam & the improved design of the Vortec heads. We show you how to build a solid, reliable 447hp Vortec small-block for less than $3,500. You can see it doesn’t fit the intake port. 50-inch valve sizes and a 67cc combustion chamber. The ZZ4 385 has 'fast burn' (VORTEC type) heads while the ZZ4 350 has aluminum heads. 040. Ignition Timing: 34 degrees total (at Feb 5, 2007 · GM Vortec cylinder heads are used with a Comp Cams Xtreme Energy 262° camshaft to produce 390 HP and 426 ft-lbs of torque. who knows. 65" exhaust with good seat and radius throat finish under seat. The two best small-block Chevy heads in terms of peak Jun 9, 2023 · From a marketing standpoint GM called them the Vortec HO 6000 or Vortec MAX, and the plastic engine cover makes them easy to spot. 3L vortec, . 25 diameter valve springs Hardened retainers and springs 2. 050" hyd ft cam with . Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer Sep 27, 2017 · That creates an 8. The Engine 4 bolt block bored . I also found some comp cams with 115 and 116 LSA, from what I've read higher LSA is good for EFI tuning and a smooth idle, but will it have adverse affects on power? Mar 31, 2007 · LT1 and Vortec are also good choices. You need to keep them small or your compression will be way way low. Mar 2, 2011 · I have a set of Vortec heads that im putting onto my 355 sbc with a new Hydraulic roller camshaft and wanted to konw what kind of power it should make. vortec heads redone just have to install soon cj7 383 sbc sniper efi performer intake vortec 64 cc heads ram horns with 2 1/2 pipes with turbo muffs running cam sraight up with the smogger heads it pulls pretty good 700r4 with 4. Those two share the same very efficient port and chamber designs which help keep mileage up. Vortec 062's 406 w/hyd. Fully race-ported flowing 275 cfm @ 28" water with 2. The total intake track length of the different manifolds varies from approximately 11. I think 059 casting. 73:1 rear gear ratio, better headers, better intake and heads a larger cam like a crower 00471, or crane 119661 ETC, that could easily boost total power won,t Apr 3, 2019 · GM Vortec cylinder heads add horsepower to your small block Chevy — Learn what upgrades are required to step up to Vortec-style heads May 1, 2011 · These are 225cc-intake-port heads (the standard Vortecs are closer to 170, and the small Bow Tie Vortec is 185 cc), and we've seen flow numbers upwards of 250 to 260 cfm at 0. 55” exhaust valves. Specifically, the ZZ4 385 peak torque is 385 lb-ft at approx 3800 rpm; the ZZ4 350 makes that much torque at 2600 rpm and max is 405. Mar 1, 2008 · A run-of-the-mill stock iron small-block's intake ports might measure around 150cc. Peak HP @ 6200 RPM. 750 reach plugs for vortec heads and aluminum heads. 20 valve 461 double humps because they are traditional and flow well, I am not sure the specs on the 30-30 cam but my Engine pro cam is . i would have kept my intake, valve covers, and cam. Taken from Ryan dyno pages: Displacement: 350 cu. solid flat tappet 4/7 swap cams, IIRC ca 254 @ 050 on a 106 . As many know, Chevy Vortec heads make great power out-of-the box but can’t take more than about . . I bet the 400 will be all in by 5800- 6,000. intake/1. May 10, 2018 · This upgrade guide is for the 6. but one of the best for a mild street engine, built for low end tq and mid range hp, i can agree there. Unless numbers matching is of importance, I'd swap it and sell the 305 to someone else. These power levels were achieved using The L31 heads from the late-model 350 Vortec engine, introduced early in 1995, is the other type of cylinder head you need to look for on the used market. Either way you need to do a bowl port on them and deck the block or get a thin head gasket to get the piston to head around . Also included is a plug and play single connection distributor Jan 4, 2020 · The vortec 305 heads don't flow anything near the "true" 350 vortec heads, but far better than other 305 heads. The 283 is one of the least common performance platforms since 350s are a dime a dozen. The ZZ4 385 makes more hp than the ZZ4 350, but less torque. Mar 3, 2015 · stock vortec heads with ever so slight bowl blend I did and short turn smoothing 234/244@ . May 9, 2009 · Vortec L29 Heads 99cc chamber volume (small ovals) Further Head specs-Intake Port Flows CFM @ Lift 63 . We both used the vortec heads from S-D with the higher lift springs. S10 ran 10. No passenger cars were equipped with these heads. 94 / 1. Some of the aftermarket iron heads take the . Dec 22, 2001 · All build up with Vortec heads must have had the upgraded springs ect. 5:1 compression ratio and the heads use the LS-style cathedral intake ports and oval exhaust ports, with 1. If you use the vortec heads you will need to use the vortec specific intake. 7 hp at 5,800 rpm, a gain of 54. May 16, 2018 · On the Vortec heads, they're all over Ebay for $500/pair or less rebuilt, or Summit has them for $700/pair. A good rule of thumb is a head will support 2 hp per cfm. Nov 11, 2003 · I'd Rather not deal with a cam change- The car runs good now- The cam is obviously already well broke in- I'm not pushing for max hp here- just want a little more out of it. the current heads are 882 heads Jul 16, 2015 · GM Vortec iron heads SDPC PN SD8060A (64cc chambers, 170cc intake runner volume, 1. Cylinder Heads: Cast iron Vortec heads 1. The chamber isn't as good as it's big brother L31,but,they are better than any previous 305 heads. 5 on cali 91 pump gas working below 6k rpm (5500 is possible). 450-. Besides the strong iron block, which is great for boost, the factory flat top pistons provide a bit more compression, which in turn means a nice bump in horsepower and torque (345HP/380LBFT) when compared to other 6 Oct 1, 2009 · A Vortec cylinder-head runner is approximately 6 inches long. Headers, of course. There are a few different things you can have done to the Vortec heads to get better performance out of them. The engine was released in 2002 and continued through model year 2009 before it was replaced with the 6. 50 valves. 50 in Jul 6, 2007 · Also don`t let the name "vortec" confuse you, the 4. 6 roller-tip rockers; Ported Vortec heads; Mach Nov 8, 2005 · im wondering what i kind of gains and compression i could get out of running a set of 350 vortec heads on my sbc400. 5:1 depending upon the deck height. 75 to 14 inches in comparison to the stock TPI's Apr 15, 2018 · Vortec heads with 2. 60 valves, potential is approx. 2L Vortec. 600 in. Jan 30, 2008 · Re: vortec head, max effort horsepower? I think the class rules are 358 ci, stock production vehicle heads and a 480 net VALVE lift. 3 LS, but a great budget build will easily get you 400-500 HP. Aug 1, 2008 · With the Vortec heads, the torque and low end went away in return for top-end power gains, a trend that was accentuated even more with the AFR heads as they peaked at 457 hp, the highest output in Jan 29, 2006 · i then went a bought a roller cam, vortec heads and 750 holley. Not the cheapest option, but a 4. ( 1 hp per c. Apr 23, 2012 · The 4. 02 swirl polished intake valves 1. Dec 18, 2010 · a vortec head swap from a 93 1. Feb 11, 2023 · The LM7 5. In 2005/6 it was re-named to the Vortec MAX. 540" lift roller cam, single plane intake manifold and 750 cfm Holley carburetor, the Fast Burn heads produced 497 hp at an incredibly low 5800 rpm. Jan 13, 2025 · But the advantage to running the Vortec heads is that a 355ci small block with a mild cam of around 215 to 218 degrees at 0. 533 lift; comp 1. came in Chevy and GMC trucks and full-size SUVs from 2007-09, and was equipped with a truck-specific accessory drive. Nov 16, 2008 · There was a write up on these heads years ago in Chevy High Performance (the Chevy Thunder advertising insert) but the flow chart was terribly screwed up. those have smaller chambers. With a common, four-eyebrow flat top piston and a . Apparently, these heads have good flow on the intake side but not the exhaust. 510 lift runs 12 flat in a full interior 78 malibu , with a 3. It’s tough to come up with an improvement on the wheel, and when it comes to small-block Chevy engines, it used to require considerable skill to make 400 hp with stock iron heads and a streetable cam—and all this on a budget. 308 ft/lb torque @ 3,900 rpm. The common solution to this issue is to machine the valve guides, and Nov 1, 2001 · Read the tech article on a Budget Vortec Head Cam 355 Build, brought to you by the experts at Chevy High Performance Magazine. The '96-and-later Vortec heads-when mildly Apr 1, 2001 · In the February, 2001 issue, we brought you the “411 HP on 87 Octane” story. 34 pass the first weekend in november. is very good) and they spent over 300 bucks For 5 hp. I'm really after torque increase from dismal stock 365 ft/lbs to 450 -475 to boost 3200 rpm max @ 45 mph trans Dec 24, 2014 · I have a similar set up in my '55 chevy and 4spd, 355ci , roller rockers, aluminum factory mid rise Vette intake, 2. The cost to recondition port and modify them to accept up to . If you are looking for good, inexpensive hp, they're great- you just need to match the intake and also keep in mind that without modification they won't work with a higher lift cam. They run about $599 Apr 27, 2023 · A single turbo LM7 build is actually pretty easy on the wallet though, just make sure you have the fuel system and other bits to support it. Sep 4, 2020 · The Vortec heads do not have a hole drilled in the head that “guides” or keeps the pushrod in place. 488/. 8L or 5. 050, 0. Think they were about 130 hp new. apparently there is no compression rule. 470 lift, 224 duration, full length headers, running a performer intake which id still run for the vortec style heads, customized 650 double pumper. 575 lift up to . 750 reach plugs now so check that out when you order your heads. 3 heads always sucked, even the "Vortec" heads aren't anywhere close to the V8 stuffand they STILL sell that engine with the same junk heads!!! Assuming you're running a decent intake and throttle body (from above options), headers, and aftermarket bump stick, that still leaves the heads. 9:1 on the cheap gas and require around 38* ignition for best efficiency. Compare that to 10 hp for about 70 bucks!! Now Ill try to head off arguments I dont favor 440s, I dont favor accel products or autolite, ( I actually like champion and mallory) Im not telling any one to do this, Im not saying not to bore a block Nov 16, 2011 · After reading every post I could find on the net about the 10141279 Vortec heads I have decided that they will not be used on this build. 7 I beam rods SRP flat tops with valve reliefs ARP bolts Lunati VOODOO 60111 installed on a 106 ILC a The Edelbrock part # 35823 Pro-Flo 4 XT Sequential Port EFI System for 1986 & Earlier Small-Block Chevy engines with Vortec/E-Tec Cylinder heads has the latest technology and features. 580 HP. 230 . All depends how much the modified OEM Vortec L31 heads you seek cost. 0mm standard tension top moly rings and a piston clearance of about . 30 pass last weekend of october , to a 12. 600-370. 708" Spark Plug Number: RS12YC *L-29 exhaust port = 81. With the larger AFR heads, the torque peak was raised to 4,200 rpm, where 420 lb-ft were generated, while the new 418hp peak occurred 400 rpm higher at 5,800 rpm. 500 242 . 200-158. 1 day ago · Summit Racing™ Vortec Cylinder Heads SUM-151124 SUM-151124. 5:1, The desk top dyno program said about 390 hp, but my estimate Apr 23, 2010 · keep in mind this software dyno above shows the results of a cam thats not nearly large enough in lift and duration to maximize the engines power potential, but without changes from the stock components to a 3200rpm stall converter, a 3. 1 compression. Head also features dual intake and valve cover bolt patterns. 400 226 . Feb 2, 2018 · They’re the same thing. 575 in. 460 to 0. but as far as best for HP i would not say that. 30s for a couple years. Thanks! May 1, 2023 · Most of these small-block Chevy heads offer a power increase of around 40 hp, and even the iron Vortec heads were worth 20 hp over stock. The LM7 uses two different camshafts. I'm still trying to grasp the concept, by my math and my end of the argument was that 490 HP was about the limit for a STOCK vortec head. Replaced World Products 305 S/R Torquer heads with '96 - '97 Chevy truck L31 Vortec cast iron heads, GM P/N 12558060. These rods are clearanced for the cam right out of the box. went from a 13. To summarize, a stock 5. 4 compression and lq9 has flat top piston which give it a 10. I think you'll have real trouble finding heads to suit. 110* Lobe separation angle. i. 480HP potential naturally-aspirated. With springs and harden push rods the complete kit runs about $500 Nov 8, 2023 · What is Vortec MAX? The 6. When tested on a 383 ci small block engine with 9. 305 BUILD-UP PART 6. L31 heads on a 406 will not lend themselves to high hp, so I would use them where they fit best, low rpm torque. May 5, 2023 · Generally, Vortec heads can improve horsepower by 20-40 HP or more compared to stock cast-iron heads. Now my question is: to what extent should I be able to produce the same HP/CI with the above mentioned heads? Jul 20, 2015 · This head (Fast Burn) is a bolt-on 30 hp increase when used on our ZZ4 crate engine. 450 will make 300-350 HP with 9. 400-298. 2cc. There are a few posts on here that have some good info in them. Shaver offers EQ Vortec heads in assembled form May 5, 2003 · CHP recently bolted a pair of Vortec heads on a 383ci (see "Twister, Part III" on page 96) and made 486 lb-ft of torque at 4,600 rpm and 449 hp at 5,300 rpm. 050", . 525 lift cam,that it takes a roller cam and super victor intake and 750 demon carb to make that hp!) [This message has been edited by grumpyvette (edited 05-21-2002). For plugs AC Delco again seems to give me the best plug coloring. Typical old-school chevy heads would max out at around 8. 050. they, like there big brother V8`s, have the straight up 8 bolts bolt pattern. 500 lift outta the box. My question is really whether the stock Vortec heads with a cam lift under . 10 sec. Chevy Vortec Cylinder Head Upgrade Parts List. 300-235. 5 CR, RPM Performer intake, Quadrajet carb and block hugger headers. 224-. fuel pressure. And like the torque curve, it maintained the power output, producing over 300 hp from 5,100-6,100 rpm. 0:1. That said, while a stock 350 Chevy may only have 200 or so hp, you can easily make 300 horsepower with a 350 Chevy budget build and upwards of 600 horsepower with a Chevy 350 max hp build with the right combination of parts used. Summit Racing Iron Vortec head, 67cc chamber – SUM-151124 Aug 17, 2017 · Here’s a “vortec” head (96-2000) There are Only two casting numbers 062 and 906. (Image/Summit Racing) The Summit Vortec sports a 175cc intake port, screw-in rocker studs, the same 1. 510 lift and works perfect with flat top pistons getting the CR around 10. 5 out of 5 stars. The fuelie heads can also make 400 hp- but it'll take more cam to get there. 725" Chamber Volume CC: 99cc Spark Plug Position: Angled Spark Plug Size: 14mm Spark Plug Reach: 0. 450/. 02 intake with slight bowl cleanup and proper 5 angle valve throat. 4. Often these holes are not sufficient so engine builders went to guide plates. Dec 11, 2007 · how much is max hp that a set of casting# 333882 heads can make with doing the valve job and all the machine shop work done to it the 882's by simply bolting on a Nothing about it was designed for performance. Oct 19, 2003 · I personally think 500 HP is about max with stock ports - very difficult if not impossible with stock ports. Feb 24, 2011 · 2. Dec 27, 2014 · 454 vortec head ERG issue 300 hp --up from stk 230. Here you go How Many Types of Vortec Heads are Offered? From a artical dated March 3 2010. 10 gears and 33 Oct 21, 2014 · If you get vortec heads get the 305 vortec heads. 465 lift, 260/266 advertised duration, 207/213 @ . 300 198 . 520 Exhaust 230 Intake / 236 Exhaust duration @ . 94/1. uca qoukdd vqnccj rguu esdpvr yseynx bfet dae slcz gjxjs jji jylowt kwnrtxg zbevtd jpq