BB intake options
Thread Starter
Advanced
Joined: Sep 1999
Posts: 87
Likes: 0
From: Yazoo City MS
St. Jude Contributor
BB intake options
Greetings! I've got a Jeb built 496 in a '70 with a Turbo hood with an Edelbrock Victor intake. I need to go to a Victor Jr. or an AirGap due to interference with the hood. Anybody out there got any experience with such a change? The hp rolls over at about 6600 rpm (526 rwhp). My gut says los up top won't be that severe, but that's an unintelligent guess. I don't really want the lower/midrange torque an AirGap would bring - can't handle what I've got now.
Here's a pic http://forums.corvetteforum.com/phot...cat/500/page/1
Any thoughts appreciated
Carl
Here's a pic http://forums.corvetteforum.com/phot...cat/500/page/1
Any thoughts appreciated
Carl
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
The Victor Jr. won't fit either. The Air Gap might, but will choke the motor if you run an air cleaner; been there done that.
526 rwhp is stout, what is the engine build?
526 rwhp is stout, what is the engine build?
Thread Starter
Advanced
Joined: Sep 1999
Posts: 87
Likes: 0
From: Yazoo City MS
St. Jude Contributor
The air cleaner just touches the hood with the Victor - the Victor Jr. should be about 1/4 inch shorter. I had an AirGap on the previous BB - it fit easily - this is a tall hood.
That pic is a little dated. The current exhaust is not close to factory - but still side - The side pipes are actually 2 - 4 inch DynoMax mufflers cut and welded together - full headers with 3 inch mandrel bends to the side - I figure the exhaust is costing about 60-75 hp - I just like sidepipes!
Carl
That pic is a little dated. The current exhaust is not close to factory - but still side - The side pipes are actually 2 - 4 inch DynoMax mufflers cut and welded together - full headers with 3 inch mandrel bends to the side - I figure the exhaust is costing about 60-75 hp - I just like sidepipes!
Carl
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Did you chassis dyno the motor with and without an air cleaner with the Air Gap? if not, you may be surprised. Unless the previous motor was very mild. With the current 500+ rwhp the hood (with air cleaner) will cause a restriction.
I have a 69 and tried everything with my 454, L-88 hood and an Air Gap. After cutting and fitting, etc, etc. The best I could do is -35 rwhp with the air cleaner on.
I have a 69 and tried everything with my 454, L-88 hood and an Air Gap. After cutting and fitting, etc, etc. The best I could do is -35 rwhp with the air cleaner on.
Last edited by 69 N.O.X. RATT; May 4, 2005 at 12:00 AM.
Race Director
Joined: Jan 2000
Posts: 13,015
Likes: 2,259
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
You can mill the intake carb pad to match the angle of Holley Strip Dominator. There are a couple of guys here with 540's that have done that and it seems to work fine. This lowers the front of carb similar to a stock intakes' angle.
JIM
JIM
Thread Starter
Advanced
Joined: Sep 1999
Posts: 87
Likes: 0
From: Yazoo City MS
St. Jude Contributor
RATT, I had a similar experience on the previous motor. It was more of a choke horn problem. I took the choke horn off and got most of the difference back. This engine has a Holley HP 950 - no choke horn - but, I've not tried with/without yet.
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by 427Hotrod
You can mill the intake carb pad to match the angle of Holley Strip Dominator. There are a couple of guys here with 540's that have done that and it seems to work fine. This lowers the front of carb similar to a stock intakes' angle.
JIM
JIM
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer