Holley 770 street avenger adjustment. the guys who built my engine says the suck.

Holley 770 street avenger adjustment Aug 9, 2009 · Hello guys sorry for a new post but I would like any opinions good or bad on the holley street avenger carbs and what size would you recommend. They fixed it at the factory and sent it back. I run a MSD AL2. Then the secondary adjustment. 5 PV, 14° initial, 35° total timing, no vacuum advance, 5 speed, Fox body, not sure on the gear ratio. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. However that was it running when the motor was already warm. (Does the full manifold port go directly to the intake?) Aug 7, 2020 · Please be aware that this is a community forum. 480", 274 deg, hyd flat tap, headers, 3" X-pipes, O2 in each collector; 4 speed, 3. The 350 CFM Street Avenger carburetor has great features such as optimized street calibrations; two vacuum ports for all necessary vacuum accessories; factory preset electric choke for easy startups; built-in fuel filters; and an included 3/8" fuel line connection so there are no unnecessary trips back to the parts store. Oct 20, 2018 · Ford 331 stroker, Edelbrock Air-Gap, RPM Performer 195 heads, 10. Any ideas on what will fit the Street May 25, 2012 · In Holley's tech manual they do not list part numbers for the 570 Street avenger metering block. . With a 5/8" open-end wrench turn the adjusting nut clockwise to lower the float level. Nov 8, 2006 · If I adjust the idle speed down a bit, the problem goes away. Available in 550, 670, and 770 CFM configurations, these Coast Guard approved Marine Avenger carburetors bring the long-established performance and durability of aluminum Street Avenger carbs to the water. If this manual is not fully understood, installation should not be attempted. The “out of the box” settings should be very close for all adjustments. Some drivers notice their engine stalls or experiences idle speed fluctuations despite adjustments. On most S/A carbs, the secondary throttle (idle speed) is fully closed. my idle is all out of wack, starting at 850 and going to 1000+ when u warm it up. Apr 5, 2015 · C3 Tech/Performance - Holley Street Avenger - High Idle Issue - Couldn't get my stock 72 LT-1 running well with the original carb, so I temporarily installed a used Street Avenger 770 that I know and saw run/drive just fine (cold, idle, hot, acceleration, etc. I have a Holley 770 street avenger carb on it. Specifically, does it offer adjustment flexibility? I'm having an issue with my GMPP350/290hp motor idling properly with the carb on it now, which is a rebuilt q-jet which still ain't right. Turn them out to richen the mixture. Using the external float adjustment with sight plugs, you can easily alter the float level without spilling fuel. The Ultra Street Avenger Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061–T6 billet aluminum. Then gas pours out of the primary boosters. Nov 25, 2018 · My 408 big block chevy is 9. But I'd like the idle in Drive to be about 700. I am busy reading everything I can to get a handle on how to get it set up. Fourthly. recommend that you only use Holley Street Avenger manifolds, which you can find in the Street Avenger catalog included Find Holley Street Avenger Carburetors and get Free Shipping on Orders Over $109 at Summit Racing! Holley's Street Avenger 4-barrel carbs offer trouble-free operation in an easy-to-install package. One common issue for Holley 670 Street Avenger users is achieving a stable idle. Unless you are replacing an existing Holley® carburetor (which already has a lever extension arm), you may need to purchase and install a throttle lever extension (Holley® P/N 20-7) on the carburetor. What I don't know, is where to start with the idle mixture screws. Oct 14, 2019 · I recently rebuilt a Holley Street Avenger 770. Turned out I didn't have the idle mixture screws adjusted right. The car was idling at 1,500 rpm when I got it home. 75 out of 5 stars. I have a 270 magnum cam in it and a weiand stealth dual plane intake plus super comp. Apr 13, 2011 · I'm in need of a new carb for my 383. Tuning the different circuits to blend seamlessly is the untimate goal of a Holley tuner. Nov 10, 2024 · 1. Their literature says to re-jet down one size Jun 2, 2023 · So while I am waiting for electrical part to arrive for a different problem, I decided to try to figure out a different problem. You can purchase a new stud from your Holley® dealer (Holley® P/N 20-67). Jan 25, 2015 · Adjust the throttle stop position (aka speed adjustment) so the transition slot looks square below the throttle. I am thinking if I screw them all the way in, then back them off X full turns to start the exact adjustment to get max vacuum. What I can't find is a simple explanation on how to make the transfer slots smaller. If anything binds, fix that first. Sep 20, 2016 · Holley has announced the all-new Marine Avenger carburetor. They weigh in at approximately 5 lbs less than a comparable zinc Apr 16, 2019 · I took my Holley 770 street avenger off of my 396 to look at the transfer slots. A 1/4 inch wrench and a little adjustment to the Jun 26, 2014 · Holley sends the Truck Avenger (and all Holley carbs for that matter) adjusted for sea level, and out of the box our carb was running rich in the thin air at our 4400 foot elevation. Once installed, car started right up. I installed a wideband gauge so I can see the a/f ratio. Cams with more duration than stock will require Mar 28, 2011 · I have a street avenger 670 on my 355 sbc. Dec 28, 2014 · So i currently rebuilt my holley 670 cfm street avenger carb because it had a bog/hesitation when WOT was applied from a complete stop or rolling start. Then off idle adjustment. When I looked at the transfer slots, none were visible. Thanks in advance Eric Jul 20, 2007 · How-to adjust the accelerator pump on Holley carburetors to avoid stumbling and hesitation upon acceleration. Jul 5, 2012 · Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly. Timing is 15 initial, 35 total. If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. Inadequate secondary idle speed setting. 5-14. Aug 29, 2018 · Today I'm going to give you some tips and tricks on setting the choke adjustments as well as the fast idle on a Holley carburetor. Street Avenger carburetors are known to bolt on right out of the box. Failure to follow these instructions, including the pictures street avenger™ carburetors - Model 4150™ vacuum econdary no Trouble® quick change adjustable vacuum secondary •Comescalibratedspecifically for optimal street performance • Tuneable from mild to wild • Up to 6% more acceleration or 5% better fuel economy with a simple spring change (springs included) four vacuum Ports • PCV • Spark Holley Aluminum Street Avenger 770 CFM 4-Barrel Carburetor 0-83770 HLY-0-83770. Holley Carb Running Rich? Watch This! | Holley Carburetor Secrets | Holley Carb Tuning |We are back at it again to bring you another holley tuning video! Thi. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Carburetor, Holley 770 CFM Street Avenger Aluminum, Vacuum Secondaries & Manual Choke, 1966-91 AMC, Rambler, Jeep - Drop ships in approx. Idle Adjustment Difficulties. the guys who built my engine says the suck. Aug 20, 2016 · Good afternoon fellow A-Body fans, I'm having a devil of a time dialing in my new Holley Street Avenger 4160 770 cfm carb. Restart the vehicle and let the engine idle May 1, 2006 · Here are a few photos with installation and tuning tips for setting up a new Holley Truck Avenger carburetor! Level Adjustment Holley includes a pair of clear plugs for the fuel level sight Jun 4, 2006 · Car idles then shuts off. if i were u, id spend the cash on a 4150 street carbs of a nice 750 demon. WARNING: If you are using this carburetor with a GM overdrive transmission TH700R4 or a TH200R4, you must use a transmission kickdown cable bracket (Holley® P/N 20-95) and stud and kickdown throttle bracket (Holley® P/N 20-121). Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. IMPORTANT: The STREET AVENGER™ carburetor has been factory wet-flowed and calibrated. You have to make good notes on what adjustments you did, and why. Second, I set up the PCV Jul 2, 2015 · We take an out of the box 570cfm Holley Street Avenger from Summit Racing and So a basic tune on the carburetor and talk about some of the tings to look out May 29, 2007 · my 770 holley street aveneger sucks too. It had a terrible stumble when you crack the Jun 9, 2019 · Holley 770 Street Avenger adjustment. To preserve warranty, these instructions must be read and followed thoroughly before and during installation. If I turn the screws on each side inward I am closing off the air mixture and getting a richer mixture, right? Backing them out would increase the air and lean out the air fuel mixtue, right? The carb I have is a 670 holley ADJUSTMENT MANUAL . Idle Mixture Adjustment Difficulties. 560" lift, 9 in of vacuum with a 3. 0-83670 670 CFM Shiny Aluminum Street Avenger™ with Electric Choke 0-85670 670 CFM Shiny Aluminum Street Avenger™ with Manual Choke 0-83770 770 CFM Shiny Aluminum Street Avenger™ with Electric Choke 0-85770 770 CFM Shiny Aluminum Street Avenger™ with Manual Choke 0-86670RD 670 CFM Shiny Ultra Street Avenger™ with Red™ Billet Parts STREET AVENGER CARBURETOR 0-80350 & 0-80500 INSTALLATION, TUNING, AND ADJUSTMENT MANUAL 199R10788 NOTE: These instructions must be read and fully understood before beginning installation. It is not. 020 - . Mar 26, 2013 · So Im going to adjust the idle mixture now that I have a vac gauge. But before you start worrying about anything more that setting up the float level and getting it to idle you need to dial in the timing first. To their credit, they returned my call but I didn't hear the phone for noise in the shop. Conversely, turn the adjusting nut counter-clockwise to raise the float level. i have a feeling i will be heading in that direction. Especially when the drag of the power steering or brakes kick in. I moved the adjustment nuts clockwise two flats at a time and the level came right down to where I wanted it. my 1981 vette has a radical flat tappet cam ( i mean it sounds like harley), 200 heads, high rise manifold. I am currently going through a 770 Street Avenger (0-80770) on top of a Pontiac 400. On the engine stall at quick throttle release, that could be the throttle blades slam shut so fast that it chokes the engine air supply too much. after that set your front transfer slots to about . 5 power valve (might be too high) Idle mixture screws adjusted to have right around 13. 4. I reinstalled the carb and now my idle is at 1200 rpm. 470" forged steel crankshaft & H-beam rods, Wiseco 4. Nov 28, 2009 · Get your self a good guide on tuning an engine and read up before diving in is the best advice I can give. For now the vacuum can is connected to timing port. Any other suggestions? Oh by the way, fuel pump is a Holley Mechanical, fuel pressure is steady at 6 psi. I can get the idle AFR to 14. 030 of the transfer slot exposed. Nov 22, 2024 · This guide explores the most common Holley 770 issues, identifies their causes, and provides clear solutions to get your engine running smoothly again. If you idle doesn't change as you adjust your idle mixture screws, then you have too much of your transfer slots exposed. From what I've read using the search, the slots are supposed to look like little squares and have around . It runs awesome with the exception of the electric choke set up, when first start May 19, 2021 · Remove the choke bimetallic spring cover and with the throttle cracked, all of the linkage should move free and easy. I checked out holleys website and for a 350 up to 6000 rpm they recommend the 670 and anything over the 770 carb. For the price of either $400(Holley) or $250( Summit) Do any of the experts have an opinion on the Summit carb? It is not a daily driver(68 Camaro) so if the Holley is the smarter purchase I'll get it. My car is running rich. 199R10219-3 . Tips include: How to check for the clearance between the accelerator pump diaphragm arm & operating lever; how-to select the correct accelerator pump nozzle size, and accelerator pump cam selection and installation. Nov 23, 2005 · Street Avenger carburetors are known to bolt on right out of the box. If you need to set the choke, maybe because you don't have the original settings or someone had it pinned open or had it out of adjustment. There were two problems. When you adjust the carb. I have since changed both to enable secondary throttle blade adjustments without having to remove the carb. com/subscription_center?add_user=HolleyPerformanceHOLLEY ON SOCIAL:Face Apr 19, 2019 · Oh it's a 770 street avenger vacuum secondary. Then if thats not working I read several post on people fixing the issues with a slightly larger squirter. 1 day ago · Holley Street Avenger 770 CFM 4-Barrel Carburetor 0-80770 HLY-0-80770. 2 block, Eagle 3. We started by going down two jet sizes on the primaries (74 to 71) and two jet sizes on the secondaries (99 to 97) as recommended by Holley. May 17, 2002 · Engine Mods - High idle problem with a new Holley Street Avenger - HELP! - I have a new Holley Street Avenger on a new small block in my '75 that I just got from the shop yesterday. Aug 29, 2020 · The only way to obtain the highest vacuum, and get my 383 stroker to run its best, is to have all four idle mixture screws turned out a half of a turn. running stinky rich, fuel mixture screws don't seem to make a difference, the idle screws dont really change the vacumm reading much. 1. 02 to . I had to disconnect the vacuum advance because it was putting in waay too much Dec 25, 2014 · They rarely post IFRs and I can promise you the IFR on this carburetor won't be adjustable either. Jun 28, 2013 · My new GMP 350HO has a Holley 670 Street Avenger carb. Now I have an electric choke and vacuum secondary and I can't seem to get it to drive real well. Put it on last night. Nov 23, 2005 · Product Description. 3. Backed off the screw Aug 23, 2012 · Looking for opinions, hopefully from experience, on the Holley Street Avenger 670 carb. Sep 27, 2015 · "I keep running into Holley Street Avenger carb problems related to off-idle stumbles and part throttle hesitations. 5-15 according to a wideband I installed, but it idles high, even at the bottom of the curb idle adjustment (1000 rpm). Mar 13, 2010 · I had a 670 street avenger that would stall the car when shifting into gear. It pulls 17. List #50418 Just bought a new Holley 770 Street Avenger carb. Factory set street calibrations are optimized requiring only a few adjustments to have your engine running efficiently. Close your primary throttle to have about . 3L SBF, Dart SHP 8. I adjusted the curb idle screw so that there was a perfect square at the transfer slot. if you need to adjust your idle speed only use the rear blades so you keep your front . Any more and mixture gets rich, while loosing vacuum. Fixed the problem. youtube. Oct 13, 2003 · I am looking at a holley 770 cfm street avenger for my 69 chevelle 396 plan on using with a edlebrock rpm intake. If you don't want to take the carb off to look, then back the screw off until it doesn't touch, then turn in whatever number of turns the instruction sheet for that carb recommends. Turn screws in to lean the mixture. May 11, 2024 · I have a Holley 770 CFM street avenger part #0-85770 vacuum secondary on my BBC 439 , I'm having a hard time getting rid of a lean spot when I accelerate, my AFR gauge goes from 12- 17 for a split second when I accelerate hard or taking it easy in any gear. Do the idle adjustment first. Do the timing adjustment again. The 350 CFM Street Avenger carburetor has great features such as optimized street calibrations; two vacuum ports for all necessary vacuum accessories; factory preset electric choke for easy startups; built-in fuel filters; and an included 3/8" fuel line connection so there are no unnecessary trips back May 20, 2004 · The street avenger differs in that it does have screw in jets in the secondary, I have one of those (670) on my small block as we speak. With the engine at normal operating temperature, adjust all the idle mixture screws until the engine idles at the desired rpm with the highest manifold vacuum. When I adjust the idle up, I get the run on issue. Often, idle mixture screws seem to have minimal effect, leaving owners puzzled. That should be your ideal mixture setting. Three different anodized color options (Red, Blue, or Black) allow for a personalized look while maintaining the ultra high strength and durability you get from billet. I have a couple ordered. would a power valve thats to high make it run to rich at idle? Jul 12, 2023 · I have a 396 4-spd with a Holley 770 Street Avenger. If you need assistance, please call the Brawler Sales and Tech Support staff @ 270-781-9741, Monday through Friday 8AM – 5PM CST. May 21, 2021 · I asked a question on the other page about a good Holley tuning book. I've already changed Primary Pump Nov 28, 2009 · How much tuning the carb will need is dependant on how closely matched the carb is to the engine you are putting it on. Just get you a tap for 6/32 thread pitch for the idle feed restrictors and you can get an 8/32 tap for the power valve channel restrictor if you want to but I have never had to change or mess with that. Nov 7, 2002 · I have a Street Avenger 570. Jul 31, 2013 · I am having same problem with a 770 Street Avenger on my 1967 with a 396 engine. I've been screwing around with the tuning for a while now and I have it pretty well set up with a few minor issues listed below. Jun 4, 2019 · If it’s been determined that adjustment is required use a large screw driver to crack loose the lock screw. AEM AFR gauge, and last but not least my worst nightmare, a 770 street avenger vacuum secondary. 025 discharge nozzle is installed when the rest of the Street Avenger series carbs have . It's on a '71 Dart; 408 (360 stroker, LA), 0. My Holley Ultra 770 would not idle down below approximately 1000 rpm. I finally got a chance to change it this weekend. The all-aluminum carburetors are hard coat anodized in a Hard Core Gray finish to protect them from corrosion in fresh water or salt water conditions. May 16, 2009 · I have my Holley Street Avenger carb off and am trying to adjust the transfer slots since I have a slight bog. Different engine combinations could require adjustment of idle mixture, idle speed, and 1. 020. Any input on how to address them further than what I have done is appreciated. Also, it accelerated fine on the freeway from cruising to full throttle. Took fast idle cam off to see if that was the problem. Didn't try again. If I increase it smoothly, it runs really strong all the way to full throttle. I will get either a Holley Street Avenger 770 or Summit 750. When I get RPM's up in driveway or on the road, I have to quickly tap on accelerator to get back to set idle speed. I have a small block hood and a RPM air gap intake. Building on the proven performance and durability of the Aluminum Street Avenger Series- we have engineered the new marine models to continue that performance heritage that Holley is known for. Jul 4, 2011 · Roger you're starting in the right place. I was able to drop the idle to around 1,000 by adjusting the idle screw, but that's How to establish a baseline idle mixture setting for your Holley carburetor and how to fine tune idle mixture and idle speed for your application. Then reinstall the choke cover and adjust the choke to have a little tension closing the choke plate. 5 a/f ration at idle Mar 5, 2008 · I changed from a holley 650 DP that ran awesome, to a 770 Street Avenger. Since we are not familiar with all manifold instructions, Holley cannot accept responsibility for their validity. It's very hard to do. Jun 9, 2019 · I recently replaced my Holley 750 with mech secondary with a new 770 Street Avenger. i dynoed the car and the air to fuel mixture is good. Sounds great, but a hassle worrying about keeping it running. I have a new Holley Street avenger 770 that i've had great luck with. Maybe a . 0). Dec 3, 2007 · Street Avenger carburetors are known to bolt on right out of the box. Same exact problem - car idles for a few minutes, then dies - fuel pours out the boosters. 2 - you can do just as we all thought. 1-2 weeks. Brodix Race Rite 270 Oval Port Heads, Edelbrock RPM Intake, Holley 770 SA Carb, ZZ502 Cam 224/234 @ . . 031 or larger. You adjust the carb. The standard Street Avenger doesn't have the nice sight glasses on the bowls, which makes float level adjustment a breeze (my Speed Demon 750 has them and it is much nicer than brass plugs - no mess). I put it back on the car and adjusted the floats as well as the ideal screw, and i still have a bog/hesitation when I floor it, once the carb Jun 17, 2013 · As you may have seen in my previous posts, I planned on changing the carburetor on my ZZ4 350 to a Holley Street Avenger 770. headers and 2 1/2 inch exhaust. vacuum at idle is about 8. We recommend that you only use Holley Street Avenger manifolds, which you can find in the Street Avenger catalog included with your kit. Part Number CFM Choke Type 0-83670 670 Electric 0-85670 670 Manual 0-83770 770 Electric 0-85770 770 Manual On the Aluminum Street Avenger’s, Holley added a built-n clear sight window for easy initial float adjustment and fuel monitoring. I never saw a Vac Secondary Holley with screw in jets until the street avenger came out, however there is a conversion kit to replace the metering plate with a jettable block. the carb is a new rebuild. For starters, the idle. Go. Feb 27, 2009 · Hi all, I spent the last few months doing a top end build on the 402, in so I installed a Holley Street Avenger carb. Mar 25, 2019 · the finest street performance carburetor currently on the market. I had to make several changes out of the box, discharge nozzle size, accelerate cam ramp etc. Adjust each idle mixture screw (Figures 3 & 4) 1/8 turn at a time, alternating between each screw. The new Marine Avengers are built to exceed the BTW, the description you described is exactly the same as my experience with my 770 Street Avenger and after some tuning which included, jetting up two sizes, adjusting the floats, adjusting the mixture, changing the secondary spring, and installing a spacer the car runs perfect. The bimetallic strip in the coil needs to be stone cold to adjust, so verify that first. I know that I need to adjust the idle mixture screws with a vacuum gauge connected to get max vacuum. 03 of an inch showing. Aug 5, 2018 · quick video of Install on Holley 770 street avenger carb (slightly used) Aug 1, 2012 · The trcuk had (from what evidence I gathered) a small Holley Marine carbuerator on it. Installed it straight from the box and she started up and run all ok. It's best to do this in 1st gear on a flat road. I currently have: PV 5. 035 max. Street Avenger carburetors are known to bolt on right out of the box and have great features such as a quick change vacuum secondary for easy fine tuning, optimized street calibrations, four vacuum ports for all necessary vacuum accessories, factory preset electric choke for easy start ups, built-in fuel filters, and an included fuel line kit so there are no unnecessary trips back to the parts Feb 24, 2019 · The billet pieces are definitely an upgrade. INSTALLATION NOTES: CHRYSLER APPLICATIONS 91 Fuel Valve Seat Lockscrew Gasket 92 Fuel V alve Seat Adjustment Nut 93 Fuel Valve Adjustment Nut Gasket 94 Primary Fuel Inlet & Valve Seat Assembly 95 Fuel Valve Seat O -Ring Seal 96 Fuel Level Check Plug 97 Fuel Level Check Plug Gasket 98 Float Retainer 99 Primary Float Assembly 100 Primary Flo at spring Mar 25, 2015 · 1 - you can't talk to Holley unless you have an hour or so to wait. Jun 14, 2019 #21 Wietse Well-Known Good evening guys. It idles GREAT. Loosing my mind trying to figure out a hesitation under quick throttle application. The paper work says it is factory set at sea level. after that open up your rear blades a bit to allow it to idle. On cruise, the AFR is 11-12. Part Number: HLY-0-80770 Estimated Ship Date: Monday 4/7/2025 Please be aware that this is a community forum. directions. 0" vac at idle (900 May 14, 2009 · C1 & C2 Corvettes - Need air cleaner help with my new Holley Street Avenger! - My mechanic that installed the new 383 stroker with a new Holley 770 Street Avenger carb says the stock air cleaner hits the float adjustment nuts. Sep 17, 2015 · If so, adjust them to achieve the highest idle, and then back out 1/8th turn. Mainly because the vacuum secondary and electric choke which increases starting and drivability. May 21, 2021 · With your Holley blocks you can make them changeable with just a little time and work and some minor tools. Hello, I have a Pontiac 455 which I recently installed a Holley 770. Thus, Holley can not guarantee an answer or timing on an answer. Jegs and Summit show aftermarket metering blocks for sale. Part Number: HLY-0-83770 Estimated Ship Date: Today 1. I'm just concerned about the big difference in jet sizes between the 570 and the 600, and if the metering blocks are different. C3 Tech/Performance - holley avenger 670/running rich - Hey guys, This is first holley carb I've ever owned and it's little puzzling than qjet i used to tune with Lars instruction. I had trouble with the curb idle running way too high-about 1,100 with the curb idle screw backed all the way out. My engine specs 350, dart iron eagle Oct 2, 2015 · I am almost certain both of my Holley Avenger 's (770 and 870)came with the allen screw secondary adjustment screw(but it has been a while), the older Holley's definitely came with the flat blade adjustment screw. 18 hours ago · Holley Street Avenger carburetors come with features to make tuning your car simple. 020 setting. And all of this comes with a silver or color-anodized finish that'll look great Nov 24, 2012 · (We put a Street Avenger 770 on my son's 454 Chevy motor and it needed the additional volume provided by the 50cc pump to avoid the flat spot off of idle). just my thought: if u think about it, the idea Jun 6, 2012 · My question is about the idle air adjustments on each side of the carb. ). Thread starter Wietse; Start date Jun 9, 2019; Prev. 8:1 Aug 8, 2004 · I just put a new 670 cfm "street avenger" carb on my 302 today, and it seems to have an accelerator pump problem. $526. 11in-hg at idle; 6. The engine is a custom made 383 Thirdly. '92 Ford Mustang GT: 385"/6. Once that’s achieved, lean the air-fuel mixture by adjusting the mixture screw clockwise a tiny amount for each adjustment screw. With the original Jan 9, 2009 · The Aluminum Street Avenger carburetors are available in a 670 and 770 cfm with or without an electric choke. I live at 5000 ft, so am trying to understand what I should do. 031/. If you want the adjustability of air bleeds and IFRs then the avenger series is not May 6, 2020 · using the Holley Emissions Design/Street Performance carburetor recommended for your vehicle. First, the Holley tech support guy said there was something wrong with the ported vacuum advance hook up. Because at 500 its pretty choppy. 55 gears. In looking at the Holley Instruction Sheet, it appears as if a. 5 compression, . Turn them equally, until you achieve the highest possible vacuum reading without adjusting the curb idle speed screw. 1; 2; First Prev 2 of 2 Go to page. I backed off the curb idle screw all the way until it didn't even touch. There are many threads on this forum about the Holley transfer slots and adjusting the butterflys. The Holley Tuning Manual has all you'll need to use your Vacuum Gauge. May 13, 2015 · Hi, so I have the rest of my 670 Street Avenger carb on my 360 tuned in now pretty good. After buying it I read a lot of people who were unhappy with a stumble off idle issue, or an initial acceleration stumble. 050, 527/544 Aug 14, 2008 · jet for max power first. Hooked all of the ports and such up to the required items as called out in the instructions. I had the motor idling at 900 rpm. They're calibrated to deliver the performance that you need, without the tuning headaches involved with other carbs. Remove the throttle stud and nut from the original carburetor. Tighten the lock screw. I set the idle and floats, have about 18 degrees at idle and 30 when its all in. The calibration should be very close for all adjustments. 5:1 and 13. I have no experienced that at all. On my 750 DP Street/HP they were . It ran great! Great throttle response, Detent Cable nice and tight with the Holley geometry kit on the 700r4. Pulled needle and seat twice and cleaned - reset float adjustment twice as well. 97 Jul 17, 2015 · I'm looking at buying a Holley 770 CFM Street Avenger Carburetor, I'm looking at two models with slight differences, which would be better Holley Street Avenger Carburetors 0-81770 - Carb Material; Zinc - No sight glass, only brass plugs - 2 idle corner adjustment Subscribe now to make sure you don't miss any of our new products!https://www. 034/. 5" PVCR 33 Main Jet 65 primary (waiting for a 66) secondary 70 Squirter Nozzle 28 Pink Cam, hole 1 Vacuum in Drive 11"ish Idle Speed 840 Idle AFR 14:1 (idles nice and smooth) Off idle cruise between 14. If I put it in park, the idle drops to 550-600 and the AFR leans out (pegged at 19. I had to hook up a vacuum gauge to one of the carb ports, and with the engine idling, adjust the idle mixture screws equally until the best vacuum was acheived. Achieving a smooth idle with the Holley 770 Street Avenger can be a common frustration. 67 to 1 with factory big oval port 101cc chamber heads. 032 and with the avenger being a street carb i would expect them to be very close to that as well. When I punch the throttle quickly, the engine bogs down to the point of dying. IMPORTANT: The STREET AVENGER carburetor has been factory wet-flowed and calibrated. qdfot rphmz bbja wmngkk srdy rdhgpc gopab ypag abxcp jux sppyc otr sfflnwg srnwe rtrfvh