1981vette81

hey everyone,
looking to swap to vortec heads and intake on a 81. does anyone know what intake, if any, will fit under stock good.
Thanks!

SH-60B

Edelbrock performer intake, carb, and 2" air filter with a drop base. A wingnut will scrape on the hood, but a hexnut just clears, with factory style replacement motor mounts.

Street Rat

I'm using a Performer EPS with a 650 DP on my '81. No problems with clearance.

cooper9811

I have a 79 but previous owner put a 1980 front clip and hood - a few years ago, I ran vortec heads, Edelbrock 2116 intake with a Quadrajet, and a 1.75 inch drop base air cleaner - fit with maybe 3/8" to 1/2" clearance, no problem.

Chinaski

I'm running a Performer RPM (Vortec) with a 1.75inch drop base and AED 4150. Stock '73 Small Block Hood.

dembo

I've had the Edelbrock vortec performer and am now running the weiand street warrior. There's no difference in performance, it's less heigh then the Edel. and the vacuum port is further up the runner, closer to the head. With some carbs there's almost no room to mount a vacuum fitting under it when using the Edelbrock manifold.
Nick

Stu's81

Edelbrock RPM air gap Holley 670 and a drop base air cleaner.

toobroketoretire

"Double pumpers" are made specifically for drag or track racing where the engine speed remains at 4000+ rpm or higher all the time. Only vacuum or AVS secondary carburetors should be used on street engines to prevent low speed bogging when the throttle is opened suddenly.

Stu's81

That is a vacuum secondary carb, open your eyes old man.

Chinaski

Nothing gets him more riled up than somebody using a double pumper. He needs to quit trolling and let it be, different strokes for different folks.

BLUE1972

I used a Weiand street warrior on my 71 400hp /440tq. roller cam
+

dropped base with 3" air cleaner

bluedawg

Hi Steve,
I run a 780 double pumper on my 400" and it doesn't bog at low rpm, I ran a 750 vaccum secondary and tuned it to my enging and it didn't run any better on the low end and actually didn't pull as hard up top(could have been the extra 30 cfm). I know that you're anti double pumper and all and thats ok, but they can be tuned and used successfully on a street engine. I don't mean to argue with you, but it can be done as I have done it. This doesn't mean that I think that every engine should run a double pumper, but modified street engines can and do make use of a properly tuned mechanical secondary carberator. Your just gonna have to agree to disagree with those of us that run mechanical secondaries.

Brass Pass