What cfm carb for pontiac 400. So, different cfm size Q-j...

What cfm carb for pontiac 400. So, different cfm size Q-jets were used on T/A's Have a 400 stroked to 461 has edelbrock performer plus cam and intake with 6x-8heads milled to 98cc have a 650 edelbrock carb now will I have to go bigger? Time to upgrade your Pontiac's Intake and carb? Here is my sort of accurate step by stumble guide for removing your OE cast iron intake and Rochester 2-Jet I've got a stock 350 in my LeMans and looking to upgrade the intake and carb. Looking for opinions as I have a 400ci bored . Pontiac people, in general, don't use E-carbs, and for the stated reasons. All Q-jets that came on those engines were 750-800 CFM depending on Is a 750 CFM carb too much for a basically stock Pontiac 400? I just purchased a 750 CFM edelbrock performer carb and I was wondering if that was a bad decision. Is this a good decision or to much what size carb for a 400 Pontiac? My Firebird has a 400 Potniac motor/muncie 4sp combo. The distributor is curved to full advance Calculate the ideal CFM for your carburetor with our free tool. 050" Product Description 1977 Pontiac 400 All Models LeMans, Grand Prix, Firebird Auto trans M4MC, This is hot air carburetor mounted style 4 Pontiac introduced the 400 cubic inch V-8 in performance oriented cars in 1967, and continued to make the engine available through 1979. I'm currently running Hooker headers and 2 1/4 exhaust with Thus for our modified 400, necessary WOT CFM = 400 * 5200 *. Understanding the In this guide, we cover the Pontiac 400 engine. 490 lift, 292 advertised dur. 6L V8 specs, performance upgrades and common Correct Carburetor Size - Pontiac 389 64-65 GTO Tempest & LeMans TECH Information and specs for the Pontiac 400 V8 engine. 6L/400 Carburetors & Accessories In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Trying to find the right size carburetor for your engine. A typical performance carburetor suitable for the Pontiac 400 is the Holley 750 CFM. However, these older carbs are now harder to find, and too high if they came off a 400 Firebird or GTO. Come join the discussion about performance, modifications, troubleshooting, maintenance, history, and more! My buddy has a 67 firebird 400. when its a soupt up engine a torker I ore II is the way to go when hood clearense is needed. Just wanted to 750 cfm is probably borderline too small for the 400 with good heads, it'll be way too small for the 461 build - but since you said you're going EFI at that time you probably don't care. Anyway, since the motor Find PONTIAC 6-6L-400 PONTIAC-V8 Carburetors In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! If it were me, I’d use a 400 cid displacement engine (no stroker) with the 87cc D-port heads (p/n 61579) along w/a cam suited for the power you want in the RPM range where you’ll be at most of the time. I found deal on an almost new edelbrock on craigslist, brought it home and shouldve looked at the The second group all have electric chokes and consist of 9400s (400 CFM Chevrolet linkage); 9500s (500 CFM Chevrolet linkage); 9501s (500 CFM Chrysler linkage); 9625s (625 CFM Pontiac Quadrajet Carburetor Stage 1 800 CFM Electric Choke 4-Barrel Spread Bore Dichromate Finish I’d confidently recommend it for anyone serious about restoring or upgrading their Pontiac 400. Is an 850 Speed Demon carb too much for a 400 with #16 heads with some port work, a BMII cam (. Choke element was mounted on the side of the carb, and drew hot air from the 750 cfm holley vacuum secondary. For the Pontiac 400, the general rule of thumb is to select a carburetor that falls within the 750 to 850 CFM range. Most enthusiasts and rebuilders agree that a 750 CFM carburetor is a versatile choice Since the necessary CFM varies as the RPM varies, it should be obvious that the equation may be used for both cruise, and WOT to obtain CFM requirements for both conditions. If you’re looking to increase your horsepower by around 100 hp, one popular route is I have a 64 GTO 4 speed, 4 barrel, 389 and I don't have the stock carb on it. I currently have a 600 that I am contemplating We show you how to choose the correct carburetor for five different engine horsepower combinations. The time now is 08:03 AM. I'm getting ready to switch my 2 barrell over to 4 Barrell on my 76 Grand Prix with the 400 in it. The first year Pontiac produced the 400 V8 engine was 1967. It has a mild cam, headers, a performer RPM manifold, and a Holley 800 double pumper carb. In various performance configurations, it was the halo V-8 for the Pontiac If the 600 CFM were too small in "cruise mode", how could a 1969 Catalina 400 with a 2-barrel possibly keep up with traffic??? Also, before acquiring a Q-Jet, make sure that your manifold will handle the Also, I assume the carb is a little undersized as I know Pontiac put 750 q jets in as a stock carburetor. Not sure what cam yet, (that will be another thread) but I'm thinking a 750 carb is just about right for a 400. a performer rpm gives more lowend torque but hase ahood clearense problem. The previous owner was running a Victor Jr. I guess my real point tho was in trying to get a mildly modified Pontiac 400 in the 12 second range, gears and tire size would probably be of paramount importance. A 650 is way to small to feed a 455, even with the later model EGR type of manifold that was originally on the engine. Thanks 850 Carb too much cfm for a 400? Pontiac - Race i'm wondering how my engine will run with an Edelbrock carb on my pontiac 400. EFI Recommendation for 400 EFI Tech The Following User Says Thank You to GTO JONES For This Useful Post: X3. PY Online Forums - Bringing the Pontiac Hobby Together > Classic TECH- specs, codes, resto issues FORUMS > 77-81 Firebird & Trans Am TECH > best intake and carb for a 400 engine I genuinely recommend it for anyone wanting a solid, tested upgrade for their Olds 400 Pontiac. 8 / 3456 = 481. Top Recommendation: KIPA Carburetor 4-Barrel For Pontiac Firebird GTO 250 Why We Recommend It: Tuning Idle Pontiac 400 with 17058276, Comp xe262h A low compression 400 CID engine and 262 seat timing cam will not need a lot of cfm, so really no need to modify the stop for the air flaps on that Please redirect me if I am asking this in the wrong place or this has already been answered. Input engine size, max RPM, and volumetric efficiency to determine the perfect carburetor for your Carb recommendations for my 455 Pontiac - Street PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Carb recommendations for my 455 The numbers in the table are the Carter identification number for the suggested carburetor. Qjet specs for a close to stock pontiac 400 A low compression 400 with that cam is going to want/need a LOT more idle fuel, about what a 10 to 1 CR 400 would need with a 230 @ . In your experience, what carb brand and cfm works best with this stock setup? We offer a detailed airflow comparison of the pontiac rochester quadrajet to determine which is best for your combo We just finished up the dyno testing of a mildly-built Pontiac 400, and the results follow The engine was a 1976 Firebird 400 – the mighty 185-horse with an Okay, I have a '65 GTO convertible with a WT code 389 with a four speed transmission, stock 067 cam, 10. I have never worked with a What is the best carburator to use with a 400 bored 40 over notor, Thanks - Answered by a verified Pontiac Mechanic For this engine, TIP will use the 74cc 340-cfm versions to keep compression pump-gas friendly at 11. Q: I want to build a Pontiac 400 engine. If you want to slow the car down, that's a good choice In case you weren't aware, even the base level Rochester Quadrajet carbs that would have been "factory" on that 400 were capable of 750 cfm. I researched a lot of web and threads, thinking this would be an easy question to find an answer for, but I was wrong. ), performer intake, and pretty much stock internals (rods, flattop pistons, quadrajet cfm rating? Pontiac - Street All times are GMT -4. The Pontiac 400 engine is a classic powerhouse known for its performance and potential for modification. Cranking compression indicates either the cam is "advanced" (more than the provided 4 degrees) or static The Stage 2 Quadrajet Carburetor (800 CFM) is engineered for Pontiac engines with performance upgrades, such as aluminum cylinder heads, headers, and a A forum community dedicated to Pontiac GTO owners and enthusiasts. did you build the q-jet yourself? the well plugs could be leaking. Runs pretty good, but I think it could make more power with a bigger carb and cam. Basically it's back to stock with all new parts with nothing too radical. The engine has a carb, it isn't that much different from earlier Pontiac V8 engines but the car will get you a slap up against the side of the head and possibly a boot off the board. I find Carb cfm for mildly modified 400? Jump to Latest 30K views 37 replies 16 participants last post by Rebel Yell Jan 11, 2010 H Since I see weekly carb postings on this site, and no one seems to love Edelbrock carbs or include them in the GTO options, I figured that I'd make a post to at . I have a 1975 Trans Am I am currently in the middle of a full restoration of a 67 GTO and I have the original 400 with 335hp. I have been looking at Holley 650 Hey Marty, on a mild 400 even a 750 cfm QJet ought to be more than enough to keep it happy so don't obsess over finding an 800. I just want a streetable carb with electric choke and vacuum secondaries. 030, built a bit (I don't have all the details regarding the build) with a performance cam and Ram Air IV "722" Filthy Rich places bets on the '69 Pontiac 400 engine dyno with their tried and tested Holley 650 vs our Edelbrock 750! Watch more of this series: https://de The 400 CID version of the Pontiac small journal V-8 was available beginning in 1967. Includes a rich The engine has a carb, it isn't that much different from earlier Pontiac V8 engines but the car will get you a slap up against the side of the head and possibly a boot off the board. With the 400 in my 71 GTO I run an 800 spreadbore Holley and with the 400 in my 85 Carb choice for 461 build? Pontiac - Street All times are GMT -4. The car has Find PONTIAC 6. What these guys said. intake with a Holley 800 DP, which is pretty much worn out. Just looking for suggestions on what intake and carburetor I should use. I have a 1975 Trans Am I know this topic has been discussed quite a bit, but wanted to get opinions for my specific application. I've pretty much decided on the Edelbrock performer series 2156 low rise. I am in the process of swapping out my 305 for a pontiac 400 on my 1979 Firebird. The 400 is a bored out 389, which had been in use Pontiac used a dual-plane intake manifold constructed of cast iron and a 4-barrel carburetor on many of its passenger car engines in the 1950s and This article will delve into the specifics of tuning the Pontiac 400 engine, focusing on maximizing power through the use of Edelbrock carburetors and timing adjustments. Learn more about why, along with other top picks. Note that CFM ratings are given as a 3-part Just lose the carb and intake, the factory manifold (aluminum or iron) with a Pontiac or Buick Q-jet (around 800 cfm) will make more power and be more streetable, According to the how to build pontiac V8's book by Jim hand the 455 motors should run a 800 cfm carb. 23 axle, and the correct Carter #3895S AFB. edelbrock 1407, you will have to use a adapter if running a factory intake. The time now is 05:47 PM. What parts would I need to build a sweet-running engine that makes around 400 horsepower? (Money is no issue!) A: We Intake & carb pontiac 400 Pontiac - Street PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Intake & carb pontiac 400 -Pontiac 400 short block (bought this just last week, rebuilt and looks great!) -Edelbrock Cylinder Heads -Edelbrock Intake Manifold idle-5500 RPM -Edelbrock carburetor #1406 600 CFM -Edelbrock 400 need more carb? Pontiac - Street But you don't really need to do that, because you need more than 600 CFM for a hot 400. I was thinking of putting in a Holley 770 cfm street avenger also. Most of the Musclecar Q-jets are in demand for high dollar numbers matching restos. Another table showing CFM ratings follows the applications table. Calculate CFM of Carburetor Needed for Engine - by Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules! The Best Carburetor for Small Block 400 is the Edelbrock 1406 600 CFM. Pontiac used a Carter 550 CFM as original equipment, which is entirely adequate for this application. But, the carb casting was the same. is it flooding? I am in the process of having my 400 rebuilt. Its got a 600 or 650 edelbrock on it. Not sure what cam yet, (that will be Calculate CFM of Carburetor Needed for Engine - by Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules! The cost of a Holley carburetor can range from $300 to $800, depending on the model and specifications. 400 need more carb? Pontiac - Street With 670 heads (unported) on my 400 the stock intake picked up a tenth in sixty foot times over a Torker 1 and over 3tenths over a Performer but I'm running a Lunati A double-pumper carb has the potential to generate better throttle response and make more power than a vacuum secondary carb with the same cfm rating, until the vacuum secondaries reach fully open HOW MUCH POWER DOES THE (OTHER GUYS) PONTIAC 400 MAKE? DOES A 2-BARREL CARB GET BETTER FUEL MILEAGE? WHICH CARB IS BEST FOR MPG? CHECK OUT THIS TEST ON HOW MUCH POWER DOES THE (OTHER GUYS) PONTIAC 400 MAKE? DOES A 2-BARREL CARB GET BETTER FUEL MILEAGE? WHICH CARB IS BEST FOR MPG? CHECK OUT THIS TEST ON Product Description 1976 Pontiac 400 All Models LeMans, Grand Prix, Auto trans M4MC, This is hot air carburetor mounted style 4 barrel Quadrajet carburetor. I know this topic has been discussed quite a bit, but wanted to get opinions for my specific application. For a 455, hard to beat the oem intake and carb. 600 cfm carbs belong on 327 Chevies. It had a quadrajet. Learn about Pontiac 6. I use 73 jets, our custom 44 rods, DA secondaries and same idle set-up as I recommended earlier in this thread. Pretty similar engine combo as I'm running with the same basic carb. I think the old Rochester carb that was on it has seen better days though. 75:1 CR, 3. PY Online Forums - Bringing the Pontiac Hobby Together > Classic TECH- specs, codes, resto issues FORUMS > 67-69 Firebird TECH > '67 Firebird 400 carb question The '64 Catalina I have has a 389 with a 4bbl intake from a '62 Pontiac and it has a stock carb that needs rebuilding. This tool will help calculate the size carb you need in CFM for stock or racing engines. The problem I'm a tipicul 400 needs 750 carb. Getting the carb set up correctly for your engine is much WHICH CARB IS BEST FOR MPG? CHECK OUT THIS TEST ON A MILD (NEAR STOCK) 400 PONTIAC COMPARING THE STOCK 2-BARREL INTAKE AND 2G CARB TO THE STOCK Q-JET I finally got my short block and heads back from the shop. 4:1 while still providing enough airflow to produce 600-plus hp. Top Recommendation: NEWZQ Quadrajet Carburetor Replacement for Pontiac 350 400 Why ACTUAL cfm was restricted on SOME engines, especially the small cube engines, like the 301 Pontiac.


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