Chevy Quadrajet Intake Manifolds - Cliffs High Performance
Jun 5, 2010 · Chevy Quadrajet Intake Manifolds. "The other item that needs mentioned here are the intake manifolds. Many of the factory intakes, even EGR versions, are excellent. Aside from the weight, no negatives from using them, even for racing. Right on the dyno, my slightly modded 1970 Pontiac cast iron intake, made 7 more HP than an Edelbrock RPM.
Quadrajet History and Design - Cliffs High Performance
Chevrolet was the first and only GM manufacturer to use the 4M Quadrajet in 1965. The 4G 4-barrel, however, was used on other Chevrolet V-8 applications, while radical, high-performance applications retained the Holley 4-barrel. Shown here is a 1966 Quadrajet, carburetor number 7026260. This basic design was typical of very early production ...
Chevy Cast Iron Intake Manifolds -- Are any of them desirable?
Dec 17, 2018 · The engine was a Pontiac 428 with 260cfm aftermarket aluminum heads, 10.6 to 1 compression and custom ground HR camshaft with 236/242 @ .050 specs. With a stock Pontiac HO aluminum intake it made 487hp. An Edelbrock Performer made 491hp. My factory iron intake made 497hp! To this day folks on the Pontiac boards cry "foul" because I modified the ...
Q-Jet on a square bore intake - Cliffs High Performance
Sep 13, 2022 · Re: Q-Jet on a square bore intake. Using an adapter is not the ideal situation as the air doesn't have a straight path into the plenum areas. Square flange intakes also have smaller plenums that spread bore intakes. It's far worse on factory four hole intakes. Aftermarket intakes typically have two big openings so the incoming air isn't ...
Quadrajet Model Designation Descriptions - Cliffs High Performance
And those Quadrajets without any letters following the 4M and M4M designation had a manual choke. The list below identifies the different types of Quadrajet designations that appear in AC Delco printed information. 4M: Quadrajet with manual choke. 4MC: Quadrajet with carburetor-mounted automaticchoke. 4MV: Quadrajet with divorced automatic choke.
Question about converting a divorced choke to electric....
Nov 17, 2018 · Can a marine Quadrajet that has a divorced choke be converted to an electric choke? This is on my '88 OMC Cobra 4.3 V6. I recently did a basic cleaning and rebuild and it runs great. However, one issue I have had is that the auto choke is slow to open due to the fact that these marine inboards run cool, like at about 160s most of the time.
Edelbrock 1904 QuadraJet Rebuild and tuning
May 10, 2020 · Re: Edelbrock 1904 QuadraJet Rebuild and tuning. « Reply #3 on: April 24, 2020, 06:14:47 PM ». The idle mixture screws are fine pitch metric threads. Not uncommon to have to come out quite a ways with them to bring in adequate idle fuel. I usually start with those at 4.5 to 5.5 turns out from gently seated. Set the APT at 3.5 turns up from ...
quadrajet on RPM Air Gap with adapter - Cliffs High Performance
Mar 29, 2024 · Re: quadrajet on RPM Air Gap with adapter. « Reply #1 on: March 29, 2024, 07:19:26 PM ». It is hard to say for sure with out a dyno, but I would be willing to bet it has an affect on it. You could use a 4 hole spacer and cut and grind on it. Opening it up as much as you can, then use a grinder to blend it to the manifold opening.
Exhaust crossover in intake - Cliffs High Performance
Oct 11, 2021 · Re: Exhaust crossover in intake. Any engine not reached the normal operational temperature is cold. Thats why engineers uses the crossover channel to heat up the manifold as quick as possible. And, thats why engineers uses the choke on carburator to add fuel until the engine reaches the normal operating temperature.
Dual-plane intake manifold divider plate
Feb 26, 2009 · The best Quadrajet Carburetor Forum on the web. ... Dual-plane intake manifold divider plate (Read 5267 ...