I didn't cut anytime off my et with these headers. Both capped and un-capped. I am running drag radials so the 60 fts. are consistent! I was getting 1.9 60 foot times. Still running what I ran before. My friend put heddmans on his 87 formula and picked up 4 tenths! Looks like these will be going up for sale when the new motor is in!!! Sorry, just had to vent!

------------------
Founder of the Greater Cincinnati F-Body Association
Greater Cincinnati F-Body Association
1988 Yellow Trans Am GTA
Click here for photos

 

what did you have on there before? Headers can't do much without a high-flo cat and a catback exhaust. Any way let me know the price when you want to sell them

------------------
I WOULD RATHER PUSH A CAMARO THAN DRIVE AN IMPORT

1983Z28 350w/ edelbrock performer RPM power package , dynomax shorty headers, 700R-4 with shift kit, 750cfm carb, edelbrock 3" exhaust system, ASCD SS hood, 16" IROC rims.

future mods:
completely done over suspension, black paint with flames, Hurst shifter, dakota digital gauge package, procharger supercharger.

 

from a performance standpoint...yes they do!
from a every day dork stand point, they are much better than stock manifolds.

 

I guess you havent been reading my posts. I mention how much Edelcrock's header suck in every other one on the Exhaust board.

Sorry to hear you got burned by them.


------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Well I got them cheap so I went ahead and bought them. BTW, I am not running a cat, and have a Flowmaster 3" exhaust. Who knows, it just stumps me. They obviously are not better than the factory manifolds, because I was running these et's before the headers. I am going to do some more tuning and see what happens.

------------------
Founder of the Greater Cincinnati F-Body Association
Greater Cincinnati F-Body Association
1988 Yellow Trans Am GTA
Click here for photos

 

You are right in that the Edelbrock Headers suck, but so does the Flowmaster....

I have both, and I picked up 30 rear wheel HP by uncapping my exhaust on the dyno.

------------------
'94 Corvette Admiral Blue
-==ICON Motorsports==-
------------------
'91 Z28 Blue/Silver ZZ4/ZF6
335.9 rwhp 374.9 rwtorque

 

Yeah but you have aftermarket engine, with many aftermarket bolt ons. So it would probably help your motor out a lot more. As for mine I am running pretty much a stock motor. With the exception of the exhaust, headers, and free mods.

------------------
Founder of the Greater Cincinnati F-Body Association
Greater Cincinnati F-Body Association
1988 Yellow Trans Am GTA
Click here for photos

 

Its not that hard to understand, if u modify the exhaust u have to modify the intake as well. When u modify your intake then the modifications of the header will pay a dividend. LIke a human being, Inhaling and Exhaling is very important to get your motor running.