my car an 89 iroc only mods are headers and a hypertech chip i'm running a 350 and auto with a 2.77 gears in back and K & N filter.
My friends 95 z28 is stock all the way maybe he might put in some K & N filter.
Just wondering for what its worth. I think it might be close from what ive been seeing. also anyone have the 0-60 and 1/4 miles on the stock 95 z?

 

The average times back then were around 14.0. But some were much faster if conditions were right, good air/driver/track. I went 13.50 the first time out in my completely bone stock 96 WS6 back in 96. I remember a 93 pace car running 13.4, that was the best time I had ever heard of being a full weight bone stock car.

Should be an interesting race.

 

If your friend's Z28 has 2.73s it should be close. If not, I think he will win. I have a '96 Formula and it feels much faster than my 91 did with a stock rebuilt motor, headers, 3.42s, and a cold air intake.

 

feel is often associated with torque though, and the lt1 should only put out about 275rwhp, mine is supposed to be 230 stock but i figure with the chip headers and k &n air filter it should be good for another 20. correct me if im wrong but shouldnt that combo boost it about 20 hp? also isnt the fact that my 3rd gen is lighter make a difference?

 

I doubt the LT1 will put out anywhere near 275 rwhp! It should be somewhere between 220-250. Your parts probably did net You 20 horses though. I'd say 10-15 from the headers, maybe 5-7 from the chip, and no more than 2 or 3 from the K@N filters. Your 3rd gen probably isn't that much lighter either.

 

in a 1/4 mile run youd probly lose. But 0-60 you should win so long as you dont botch the launch. Its basically going to come down to driver so long as he has the same gears.

 

Assuming both cars in good shape, it's a drivers race. My friend had a 94 Formula with a 6 speed, I had a 350TPI backed by a slow shifting 700r4, we both ran in the 14.0 14.2 range on the same day.

 

It should be a good race if you're running mid to low 14's. Your going to need to beat him on the launch though, because he is going to have much better top end pull. When my buddies LT1 was stock, and so was I, we would be even to around 65ish, then he would slowly start creeping away.

Now we both did headers/full exhaust, accept he did gears and an intake, and it's the same result but he pulls even harder on me up top now.

But since you got some mods, and he doesn't, it should be a good race.

 

My WS6 put out 274rwhp bone stock. The lowest I've ever seen a LT1 was 25x rwhp. Most were in the upper 260's-270 range. At least back then.

My TTA only weighed 100 lbs less than my WS6.

 

yea i looked it up and saw only a 100lb difference at base of z and iroc but that is base other mods make a difference you know my absence of a radio and weight loss of 3lbs on it will make all the difference

 

I think you could get him in the 1/8 mile, but he should win the 1/4. Your Probably around 14.4, hes around 14.0.

 

Interesingly enough, I tested a 1989 Iroc 350 TPI (via G-tech), chip, underdrive pulley, aluminum drive shaft, coolant bypassed, air foil, 2.77 rear and got 0-60 in 5.9 sec, 1/4 mile 14.6 sec. The other contender is a 1995 Z28 w/91k miles stock, LT1 auto, 3.23 pulled 0-60 in 5.5 sec, 1/4 mile in 14.1 sec via G-tech. The '95 Z28 was so much fun! The handling/ride was much better in my opinion but a pain to work on.

 

TTA 1387, those numbers are pretty high for a stock Lt-1 car. My buddys older brother had a 97WS6 6-speed put down 254rwhp totally stock. I know from several old hot-rod or chevy high performance mags. that it was common for a 93-95 z-28 auto, to put down 220-230rwhp stock. I not saying it didn't happen but my zz4 puts exactly 274rwhp to the ground and there is no way in hell a totally stock LT-1 will come near my car. Was it a mustang dyno? Also 13.5 is pretty fast for a stock WS6 but I have seen 13.6 on a stock LT-1 car once. You could have just gotten one of those cars that pulls better numbers then the rest. It just seems like alot of power for 305hp at the crank. 260hp would be about 15% drivetrain loss.Either way it should be a pretty good race.

 

It was dynoed on a dynojet, think I still have a copy somewhere. I ran my WS6 totally stock only one day. Got 3 runs, two 13.7's and then the 13.50. The only difference being a better launch.

I'll try to find my dyno.

 

my 90 iroc took a 95 z28 with a catback,at the time all i had were runners,tb, and catback at the time. started at a 40mph rolll and took him to 100. race him and see what happens.

 

"stock" lt1's run mid 14's period............stock l98's run high 14's to low 15's, these are closely matched motors. mod em and run em, then report back. tired of bogus #'s on this thread!!!!!!!!

 

That's pretty much the short and tall of it there, average for average that's how it'll play out. Everyone seems to throw up numbers from cars with "minimal mods" or factory freak cars. Hell a local here had a "stock" Lt1 car that had a shift kit and a stock looking exhaust that was totally void of cats. I don't know if he had a factory test car or the previous owner wouldn't fess to the mods (no clue why he wouldn't) but it wasn't typical of any of the other LT1 TA's I'de been in. There was no button for performance shift and a few other anomalies about that particular car.

 

Think you should have a look back in history of what LT1's were running back then. I know what mine ran the only time it was stock. Two 13.7 runs on 2.2 short times. Last run was a 13.50 on a 2.0 short time. This was at MIR with many, many witnesses.

There were others that were faster, not many but there were a few. A lot of them broke into the 13's. Most of them hovered around 14.0-14.2. Some even ran in the 15's. Depends on driver, weather, and track.

 

"There were others that were faster, not many but there were a few. A lot of them broke into the 13's. Most of them hovered around 14.0-14.2. Some even ran in the 15's. Depends on driver, weather, and track."

So it's safe to say if we average all these numbers they run low 14's?

 

In Chicago, I've watched dozen's of near stock LT1 cars run in the 13.6-14.2 range depending on all of the circumstances. All ranging from 98-103 mph... A stock 2.73,A4, 94 Z28 ran a 13.89@ 99.x in GM High Tech. While a 97 WS6 TA hit a 13.3 at 107. Many variable's like tracks, dyno's, weather conditions, car condition, and good driving.... etc,etc, play a huge part of what keeps an LT1 a bit ahead of the TPI cars. STOCK FOR STOCK! Not trying to start a dispute! Only my......

 

I'd say the average was 13.9-14.2, back then.

 

I'd agree the average stock LT1 today runs low 14's. My buddies bone stock 95 LT1 Vert Camaro ran a 14.2.

 

i would have to say he will probably win but its all on the driver. i have a 1991 z with a l98 i went 14.6@94 and my buddy with a 95z auto went 14.4@97.

 

r u sure those arent the #'s from youre tta

 

Nope, the TTA was faster bone stock than the bone stock WS6. Well, my TTA did have Firestone Firehawks the first time I had it at the track but other than that, it was stock. The WS6 was as stock as it was ordered.