`72 454 intake question
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
`72 454 intake question
Hi guys!
Will i gain anything by switching my stock intake, apart from weight reduction and would my Q-jet with divorced choke work if so?
I want to keep my stock hood, so it has to fit under that.
Engine is going to be rebuilt to a 468cui with Straub rollercam this winter.
Will i gain anything by switching my stock intake, apart from weight reduction and would my Q-jet with divorced choke work if so?
I want to keep my stock hood, so it has to fit under that.
Engine is going to be rebuilt to a 468cui with Straub rollercam this winter.
Last edited by clwi; Jan 27, 2016 at 11:20 AM.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Burning Brakes
Joined: Jul 2015
Posts: 823
Likes: 57
From: Austin TX
I changed my '72 454 to the early Edelbrock single-plane Torker and various Holley square-bore carbs back in the mid-'70s. Air cleaner options were much more limited then, so I used an aluminum scoop that stuck out through the hood. I suspect one of the newer low profile cleaners might fit without cutting. As for performance, there was no comparison. Torque and fuel mileage both went up (also had headers and an RV cam). I was never even tempted to go back to the stock manifold. It was a totally different car.
Last edited by 454Luvr; Jan 27, 2016 at 01:19 PM.
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
The Torker II was the only one I found that fit under the stock BB hood. I dynoed it, and found that it lost quite a bit of torque, but made about 20 more hp up top. I also went from the Q-jet to a Holley 750 as the Torker II is square bore. I had to cut the choke horn off is it got too close to the aircleaner lid.
Headers got the torque back + more and really bumped hp.
Headers got the torque back + more and really bumped hp.
Race Director
Joined: May 2006
Posts: 18,733
Likes: 2,582
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
This will fit with an adapter
http://www.edelbrock.com/automotive/...orker-bb.shtml
http://www.edelbrock.com/automotive/...orker-bb.shtml
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Instructor
Joined: Dec 2012
Posts: 107
Likes: 4
From: AZ
GM has an oval port intake for the 454 that is similar to the factory aluminum rectangular port intake on the 427's and 454's with rectangular port heads. If I remember correctly, it should fit with a holley under the stock hood. Intake is 4.45" tall and is part number 12363406. It's $271 at Summit. I have an L88 hood, so I was able to squeeze a Edelbrock RPM Air Gap intake, Quick Fuel 750, and a standard low profile air cleaner with 3" filter element. It's close, I run a button head bolt instead of a air cleaner stud and nut for extra clearance. I had a regular hex bolt, but it was rubbing on the hood a little. It's another reason why I wanted to go to solid mounts.
Last edited by stc315; Jan 27, 2016 at 10:01 PM.
Race Director
Joined: May 2006
Posts: 18,733
Likes: 2,582
Adapter
Burning Brakes
Joined: Jun 2010
Posts: 1,165
Likes: 93
From: Bellmore NY
The stock intake isn't as bad as everyone seems to say.
My 1974 LS4 went 13.44 @ 104 with the cast iron pancake intake and q-jet.
I have a 427/390 hp aluminum intake all ready to go on my new motor. I also have an edlebrock performer 2-0 sitting around....
****Believe it or not, the plenum is actually slightly deeper on the stock manifold than the performer, despite the lower carb pad height!
My 1974 LS4 went 13.44 @ 104 with the cast iron pancake intake and q-jet.
I have a 427/390 hp aluminum intake all ready to go on my new motor. I also have an edlebrock performer 2-0 sitting around....
****Believe it or not, the plenum is actually slightly deeper on the stock manifold than the performer, despite the lower carb pad height!
Instructor
Joined: Dec 2012
Posts: 107
Likes: 4
From: AZ
The stock intake isn't as bad as everyone seems to say.
My 1974 LS4 went 13.44 @ 104 with the cast iron pancake intake and q-jet.
I have a 427/390 hp aluminum intake all ready to go on my new motor. I also have an edlebrock performer 2-0 sitting around....
****Believe it or not, the plenum is actually slightly deeper on the stock manifold than the performer, despite the lower carb pad height!
My 1974 LS4 went 13.44 @ 104 with the cast iron pancake intake and q-jet.
I have a 427/390 hp aluminum intake all ready to go on my new motor. I also have an edlebrock performer 2-0 sitting around....
****Believe it or not, the plenum is actually slightly deeper on the stock manifold than the performer, despite the lower carb pad height!
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
this is what you want factory aluminum intake, on 454, no clearance problems.
factory 427/390 hp aluminum intake
factory 427/390 hp aluminum intake
Last edited by 69Vett; Jan 31, 2016 at 07:50 PM.
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 254
From: Catlett VA
intake
Edelbrock makes their "air gap" intake for the 454. Does anyone have one on their car? Design theory is good, but it looks like it is higher than stock. I have only about a half inch clearance to spare with an Edelbrock that mimics the GM intake, but is square base instead of spread bore. RA
Instructor
Joined: Dec 2012
Posts: 107
Likes: 4
From: AZ
Edelbrock makes their "air gap" intake for the 454. Does anyone have one on their car? Design theory is good, but it looks like it is higher than stock. I have only about a half inch clearance to spare with an Edelbrock that mimics the GM intake, but is square base instead of spread bore. RA
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 254
From: Catlett VA
hood clearance
Thanks- I have the long version of the BB hood, so it looks like it will fit. I'm actually doing some advance planning before I buy a bunch of stuff and then have to figure out how to make it work, like whoops! now gotta cut a hole in hood. (the PO of my car used a fairly long threaded rod for the wing nut to hold the air cleaner in place. I know cause there is a repair in the hood where he apparently slammed the hood shut without checking clearance.)
RA
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 254
From: Catlett VA
carb
quick fuel 750 double pumper How do you like that carb? I have a QFT 750 like yours, but without a choke. It runs like crazy, but of course starts a little hard when cold. I'm considering replacing it with one with a choke for drivability.
Instructor
Joined: Dec 2012
Posts: 107
Likes: 4
From: AZ
Love the QFT carb. Mine doesn't have a choke. Hard to start when cold. But it doesn't get too cold in AZ. Just have to pump it a bunch and keep the rpms up until it warms up. It was spot on out of the box. Just had to set idle speed. Intake and carb really woke up my engine. I just need to upgrade exhaust now. Still running factory pipes behind my headers right now. Looking at getting a Pypes system for it.