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Topic: Intake/Carb combo (C3 454/270HP - now 480HP)

in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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Intake/Carb combo (C3 454/270HP - now 480HP) (1/9)
 3/27/24 12:17pm
BillzC3
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Vette(s):
1972 Corvette Convertible 454. A/T, P/S, P/B, P/W, A/C, Tilt Tel Steering Wheel, Deluxe Leather Interior.


Joined: 3/8/2024
Posts: 2

Carburetor swap. I have been told that there are no after-market intake/carburetors combo that will fit under the original hood. I looked into JEGS and Summit and spoke with their tech dept. Neither came up with a combo that works.

 

Has anyone found something that works?

 

Thanks, Bill

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Re: Intake/Carb combo (C3 454/270HP - now 480HP) (2/9)
 3/27/24 12:54pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1427

Do you not have a big block hood?



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Re: Intake/Carb combo (C3 454/270HP - now 480HP) (3/9)
 3/27/24 1:04pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1427

Here is an interesting thread, note post #6.

https://www.corvetteforum.com/forums/c3-tech-performance/2461041-454-carburetor-and-intake-reccomendations.html

Also, put "carb and intake for 72 corvette" in your search engine....



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Re: Intake/Carb combo (C3 454/270HP - now 480HP) (4/9)
 3/27/24 1:05pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2408

The BB hood shows in the picture. 



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Re: Intake/Carb combo (C3 454/270HP - now 480HP) (5/9)
 3/27/24 11:29pm
NorskyLifetime Member
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Burke, VT - USA

Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Still have - "BLKBRRD" - '78 Pontiac Trans Am


Joined: 1/23/2002
Posts: 7218

Don't know if this is any help but "The Toy", the '70 convertible I owned for a bunch of years, was built in early February of '70 with the base 350ci.  When I bought it in 2000 there was a Holley carb on it instead of a Q-jet.  There was enough clearance under the stock hood to add in a few layers of Mr Gasket stuff to help insulate the carb from the manifold (which solved the heat soak issue I was having).



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Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: Intake/Carb combo (C3 454/270HP - now 480HP) (6/9)
 3/28/24 12:07am
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1427

Norsky said:

Don't know if this is any help but "The Toy", the '70 convertible I owned for a bunch of years, was built in early February of '70 with the base 350ci.  When I bought it in 2000 there was a Holley carb on it instead of a Q-jet.  There was enough clearance under the stock hood to add in a few layers of Mr Gasket stuff to help insulate the carb from the manifold (which solved the heat soak issue I was having).

He has a  big block.




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Re: Intake/Carb combo (C3 454/270HP - now 480HP) (7/9)
 3/28/24 1:15pm
BillzC3
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Vette(s):
1972 Corvette Convertible 454. A/T, P/S, P/B, P/W, A/C, Tilt Tel Steering Wheel, Deluxe Leather Interior.


Joined: 3/8/2024
Posts: 2

The BB sits higher. Even though I have a BB Stock Hood, I was told that the after market intakes are taller (better air flow/draft) and I would need to change my hood for that. Not changing the hood. I just spoke with the guy who is building the engine for me and he said he would re-jet and make the stock Q-Jet work for me. Thanks for all the input.

Re: Intake/Carb combo (C3 454/270HP - now 480HP) (8/9)
 3/28/24 3:49pm
NorskyLifetime Member
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Burke, VT - USA

Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Still have - "BLKBRRD" - '78 Pontiac Trans Am


Joined: 1/23/2002
Posts: 7218

Didn't realize there was that much difference in size between the "Mouse" and the "Rat".  Glad a solution was worked out.



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Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: Intake/Carb combo (C3 454/270HP - now 480HP) (9/9)
 3/28/24 3:55pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2408

Hey Norsky, Been a while since I've heard that moniker for the SBC and BBC. It goes back to early wrenching days and dirt tracks. Showin our age my friend! 



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