New manifold ?
Thread Starter
Burning Brakes
Joined: May 2006
Posts: 865
Likes: 53
New manifold ?
Hi - I have a 1971 coupe , L48 with headers , torquer ll manifold , edelbrock 600 cfm carb , and Comp Cam rockers . I don't know the cam specs , but I was thinking of changing the manifold to the low rise Performer . My car needs to really rev to make power . Do you think I would notice any change ? And would I still be able to use my stock hood .
Thanks . And especially thanks to all the people who post on this site . It seems whenever I have a problem , someone else asks a relevent question .
Thanks . And especially thanks to all the people who post on this site . It seems whenever I have a problem , someone else asks a relevent question .
Le Mans Master
Joined: Apr 2005
Posts: 6,347
Likes: 418
From: Seattle Area WA
IMHO, you would be much better off with the dual plane Performer intake as opposed to the single plane Torker II which is designed for higher RPM operation. The dual plane intake will provide much better throttle response from off idle and help you with more bottom end torque. Your unknown cam could be part of the problem as well, how well does it idle?
No problem with the stock hood and a Performer.
No problem with the stock hood and a Performer.
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)
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2017 C2 of Year Finalist
Look at the Performer and the new Weiand Warrior series. Both will do a LOT better on your car.
JIM
JIM
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
IMHO, you would be much better off with the dual plane Performer intake as opposed to the single plane Torker II which is designed for higher RPM operation. The dual plane intake will provide much better throttle response from off idle and help you with more bottom end torque. Your unknown cam could be part of the problem as well, how well does it idle?
Drifting
Joined: Aug 2008
Posts: 1,381
Likes: 11
Here is an interesting article. Particularly on how the factory q-jet intake performs vs a weiand manifold on a nearly stock motor. You can get a pretty good idea of your cam size with a vacuum gauge. If you have 18" to 22" manifold vacuum your cam is stock or darn close to it. 14" to 16" is probably in the 214 to 220 degree range. If you do have a cam closer to stock you're better off with a manifold closer to stock.
http://www.superchevy.com/technical/...ons/index.html
http://www.superchevy.com/technical/...ons/index.html
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