I bought a 93 z28 reaclety like in may the car has been sitting for 4 years the guy said it has a hot cam milled heads k&n intake bbk 58mm throttle body 1.6 rockers slp stainless headers borla stainless exhaust shift kit and a 2800 stall How much horse power do your guys think my car has. My cousin has a 2000 z28 with a 2.73 gear stock just with a slp air lid and I can't beat him and my car ran a 12.9 before the guy said who I bough it from but I can't even beat my cousins car what's wrong with my car I did a 13.3 at 104. I really want my car to be a mid 12 what would be the best way to do this with keepin the stock bottom end... And how much horse power can a stock rear end handle. Thanks for looking guys.

 

rear end can not really handle stock hp, it depends on your tracktion. something has to be wrong if your car runs 12.9- 13.3 and your cousins car is stock

 

ohh and heads and cam, you will be fine

 

Ya he's car is completely stock be sides the air lid what kinda heads and cam should I go with I already have a lt4 hot cam in it

 

le2 heads and custom cam from le, elliotportworks.com or an AI setup. some suspension work will do you some favors. what kind of tires does he have and you? is he beating you by a lot or a little? are you sure he doesnt have cam and telling you it just intake to mess with you or some n20?

 

No I know for a fact he only has a air lid and I wanted to keep my cam just make the most and cheapest horse power I can with this setup I have when I bought my car the stupid *** put winter tires on it so they never hook just spin and he has z rateds Don't know the tire size off the top of my head When we race on the street from like a 30 roll he beats me by like a half of fender and on the free way from like a 50-110 he walks on me by like a car and a half

 

Has it been tuned? That would be my best guess.

 

Or something, you should be in the 340+rwhp range and running 12.50's or less now. Are you sure it has a cam ?

 

The guy I bough it from put a jet stage 2 chip in it but it has never been dyno tuned know where I can get a dyno tune in the upper Illinois area

 

Ya my car has a hot cam in it you can here it lobe and have all the documents for it

 

So the car is untuned. Those chips do nothing other than advance the timing and are made for a stock engine. You need a tune, either mail order or dyno, gears, and might want to consider a bigger stall. Do a full tuneup too if you already havnt(plugs, wires, fuel filter, etc) to make sure everything else is good to go, if it has been sitting for 4 years. There is no reason your car cant be a low 12 second car if you finish setting it up properly.

 

My god is it really that hard to use punctuation??? Makes it hard to read what you write. So annoying...

But anyways that Jet chip will not do anything significant for performance at all. It's gonna need a good dyno tune or at least a PCMforless mail order tune to run worth a crap. FWIW my bolt-on LT1 runs what your car does so there's definitely a lot left on the table with your setup.

 

My bolton car runs almost a second faster than what your car runs so yes there is something very wrong.

 

You need to get it tuned for the hotcam. I have the hotcam and LT4 springs with stock rockers and I trap 108mph. You should run 108-110mph.
Check out Ion @ Madtuner for a tune. He's local to us in Elgin so no shipping.

 

Okay I'll check it out... Do u know much he charges and how much horsepower do u guys think I'll get out of it once it's tuned

 

You're pretty good at that there typing thing.

 

Dont stress on the horsepower numbers. A stalled auto isn't going to put down impressive numbers. But once it's running correctly, the track time should show that it's putting down some power. You should also be beating a lid only ls1 car once it's running correctly. My PCMforless tune was under a hundred and I bought the cable to upload it to my pcm myself.

Just saw it's a 93 so you can't upload the tune yourself. Also since it's been sitting so long, do some maintenance. You'd be surprised how much difference a tune up can make.

 

I did a tune up when I first bought it plugs fuel filter fuel injector cleaner and it made a it alot faster But I still can't beat that ls1 on the street my car puts up a better time at the track but still can't beat him

 

If you're faster at the track I wouldn't even worry about beating him on the street. So many variables go into racing on the street.

 

tell him to race you at the track