C3 Intake manifold selection
Thread Starter
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
C3 Intake manifold selection
Hey guys
Working within the constraints of a C3's hood clearance... what manifolds are we able to run? I'd like to run the performer air-gap, just for the denser intake charge. Whatever your running thats not stock, could you list the intake/carb/air cleaner setup? Doesnt matter if its small block or big block... I'm sure somebody is pondering doing it!
I've got 882 heads, so I need the ports to be smaller than 2 inches tall by 1.2 wide!
I havent been able to get the search function to work... I remember seeing a couple threads about the air-gap but dont remember the outcome, of whether it fit or not!
Working within the constraints of a C3's hood clearance... what manifolds are we able to run? I'd like to run the performer air-gap, just for the denser intake charge. Whatever your running thats not stock, could you list the intake/carb/air cleaner setup? Doesnt matter if its small block or big block... I'm sure somebody is pondering doing it!
I've got 882 heads, so I need the ports to be smaller than 2 inches tall by 1.2 wide!
I havent been able to get the search function to work... I remember seeing a couple threads about the air-gap but dont remember the outcome, of whether it fit or not!
Last edited by ZD75blue; Dec 8, 2004 at 10:45 PM.
Burning Brakes
Joined: Nov 2004
Posts: 1,028
Likes: 0
From: San Antonio Texas
GM makes an aluminum low profile intake manifold for vehicles with clearance problems (read Corvettes). i have on my 79 and am very happy with it. Bonus, it has dual bolt pattern for square bore or spread bore carbs so you can use your Q-Jet or go with a Holley/Edelbrock, etc. and use the same manifold (no adapter required).
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Well for what kinda carb?
Plenty alum intakes at the boneyard Blue Man. I was at a pick ur part salvage last Saturday and saw plenty of stock Chevy alum intakes for Qjets. Why spend $200 when $20 will get u nearly the same performance or even match it?
Look in mags for carshows/swapmeets in ur area and alum intakes are always a popular item for sale - and all kinds. And swapmeets can be a great place to source other parts too.
Happy hunting.
cardo0
Look in mags for carshows/swapmeets in ur area and alum intakes are always a popular item for sale - and all kinds. And swapmeets can be a great place to source other parts too.
Happy hunting.
cardo0
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Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
I have a 1 1/4 inch drop base with 2 1/4 inch filter element and I can use up to a Victor Jr. with 1/2 inch spacer and still clear the hood by over 1/4 inch... The Performer RPM Air Gap and the Victor Jr. are about the same height...
Thread Starter
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
I've been thinking about that air gap... but I may take cardo's advice and pick up a cheap weight saver... and eventually switch to aluminum heads as well.
Save the moolah while waiting for some greenies to float my way
Save the moolah while waiting for some greenies to float my way
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
The L-82 aluminum manifold is patterned after the famed LT-1 intake manifold. Far superior to Edl. Performer. Which in my opinion is just a notch above some old cast iron GM after thought.
Thread Starter
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
My parts interchagne manual lists the L82 manifold as swapping with the following:
Part number 14007377 (78-79 vette L82)
77-78 caprice 350 4 barrel with cali emissions
78 century 305 4 barrel V8 with cali emissions
79 malibu/monte carlo/sprint/cutlass 4 barrel
For the LT1 Manifold 3972115 (Aluminum highrise 3972110)
70 corvette 350 Lt-1
70 Camaro Z28
70 Chevelle 350 330 hp V8
Part number 3931575 Aluminum (69 Corvette 350)
69 Corvette 350, 350hp V8
68-69 Camaro Z28
Those are the only aluminum manifolds listed...
Part number 14007377 (78-79 vette L82)
77-78 caprice 350 4 barrel with cali emissions
78 century 305 4 barrel V8 with cali emissions
79 malibu/monte carlo/sprint/cutlass 4 barrel
For the LT1 Manifold 3972115 (Aluminum highrise 3972110)
70 corvette 350 Lt-1
70 Camaro Z28
70 Chevelle 350 330 hp V8
Part number 3931575 Aluminum (69 Corvette 350)
69 Corvette 350, 350hp V8
68-69 Camaro Z28
Those are the only aluminum manifolds listed...
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
I thought those late model (80"s) aluminum manifolds were just low performance cast iron manifolds that were cast in aluminum for weight savings. I also heard they have water leakage problems. Joe
PS The LT-1/Z-28 manifold is the same as the Holley 300-36 manifold, Holley helped develop it for Chevy.
PS The LT-1/Z-28 manifold is the same as the Holley 300-36 manifold, Holley helped develop it for Chevy.
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Using the 71, 72 LT1 aluminum intake #3959594, great manifold and you'll save 24lbs. 
Same height as 70 aluminum intake #3972110 just differant divorced choke connections. 650 with speed demon carb with 1/2" spacer. You will need a drop base air cleaner to make it fit. I use the LT1 drop base, works just fine........
Same height as 70 aluminum intake #3972110 just differant divorced choke connections. 650 with speed demon carb with 1/2" spacer. You will need a drop base air cleaner to make it fit. I use the LT1 drop base, works just fine........