Got done installing slp headers and y-pipe on my car. The difference is incredible, but i did notice low end loss below 1,500 rpm (not really usable anyways). My best
0-60 mph was 7.2s I should be in the high 6's when i put that posi rear end in. I have made a lot of runs, and the beginning launch is what makes the biggest difference for sure.

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Pat Hirsz
www.iit.edu/~hirspat/MyPage2.htm
88 305TBI
Mods:Hooker Aerochamber 3" exhaust, gutted kitty, March pullies, no smog, 180 thermo,
14x4 K&N, 3.42 gears(open), Ultimate TBI Mods,AFPR,MSD(ignition,coil&wires),Edelbrock TBI Manifold, 195ltr/hr fuel pump,
Eibach springs with KYB's all around,
Harwood cowl hood, Z-28 wing, fresh paint(black)
120,000 miles, 5spd, T-tops,slp headers on its way

92 RS, 305TBI, auto, 3.08 gears, 180 thermo, glasspack (no muffler)

 

Also, after i took off my valve cover i noticed that my gasket was broken, so i replace it and now the car doesn't burn any oil at all. So i've decided to keep this engine a little more and instead of putting the 350 in, i'm gonna work on my 305 this summer. I'm going for 300hp, but i need opinions on what type of cam would get me there. My set up is: s/r tourqer heads, rpm manifold, 670 tbi, and custom chip. I've already put in a fuel pump that's good for at least 300hp. Any suggestions on the cam??
thanks

 

So what was the differnce before the headers in time?

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Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

Before the headers and without the cat back system on, i ran a best of 8.4 in 0-60mph out of like 4 tries.

 

On my car, I safely can say I at least shaved 3 tenths off my ET with the headers. That's a conservative estimate. They make a big difference.