Recently, I ran a 13.59 at about 48 degrees. I have been talking to different non-vette people and they seem to think that is about right for my 93 base coupe. The car has 108k miles and is a 6 speed. I don't know about the car's history, so I don't know if it has been chipped or cammed. The exhaust is stock original and the tires were worn out and old. I thought there was excessive wheel spin as I did it without the traction assist. That was my first run ever. All the rest of my runs were scattered around up to .8 higher (don't ask!)

My question is : Does this sound like a stock or modifed run time? I posted my slip on DragTimes.com. The car does have a little miss at idle and will creep up to 230 degrees if I don't keep the AC fans running.

 

Your car is doing exactly what it should be...

mid 13 is normal for a stock C4. BTW...running the a/c fans doesn;t help anything. The stock tune is designed for temps in the 220-230 range. Your fans will come on when they are programmed to come on..at 226-228. You can use the fans to blow air while waiting to run, but if the car is in good shape it should not be getting very hot sitting there at idle. Should idle and sit at 180 at the most when its 48 degrees outside. You do not want to run it hard if its cold at less than 160. IMO

If you have a misfire that needs to be addressed. Your Opti may need attention and the plugs probably DO. At the age of your car, its a certainty that its time for injectors...just another wear part on a Corvette.

Traction is why God gave us traction control...or precise use of the foot. Wheel spin is pretty normal seeing as how the car was designed to have bottom end pulling power for stop-lite street racing and not a more useful mid range to upper rpm range for the track. The LT did work to address those power band issues of the L98 but its still a low end engine that will spin the tires to pieces but may not break 100 in the 1/4. Strange but true.

Cars with minor mods can see 13...high 12s.
With a decent amount of money (exhaust, headers, intake, runners) you get
to low 12s..

getting into 11s cost $$. 10s is no longer a street car.

 

Sounds about right. I run mid 13's in less than ideal conditions on a routine basis. My best times are in the 13.4 to 13.3 range. Stock except for the cat back system and a manual fan switch to keep those temps under control. I've never ran in as cool as conditions as you did however. My local track closed in late October.

Don't ever use the ASR to try to get traction its for street driving. Launch technique is key.

FYI, you'll get more consistent with experience and seat time. I did the same as you when I first started out. All over the place, then 30+ passes later settled down a lot.

 

What '93Rubie said. ^^

Well none of that is true. Temps will increase sitting at idle (staging lanes) of course, b/c there isn't any airflow over the radiator. Running the A/C DOES run the fans (as the OP knows) and keeps the temps down in the 205*F region. While the car is designed to run up to 230*F, will it produce the best results at those temps? No, it won't.



I wouldn't call the LT1 a "low end" engine -especially when comparing it with an L98. And an LT1 should absolutely trap over 100. If not, something is wrong with the car, driver or both.



LT1 doesn't need an "intake or runners". It already comes from the factory with an "aftermarket" short runner intake in which the runners are in integral part of the intake. To go 12's, it needs a cam and a driver.



OP: You're right in the "fat" of what most decent drivers get out of their LT1/M6 cars. Being that it was your first time, and you mentioned traction issues, I have no doubts that you could get it to go faster and quicker. More info on your run (60', trap, etc) would help us tell you what you're leaving on the table. But with just the blanket ET, It sounds like a stock car, running averageish stock ET's.

For another comparison, I have gone 13.6's/103ish in mine (stock LT1/M6), However, it was in Vegas (2200' elevation) and it was also ~100*F. I think a healthy LT1 should go low, low 13's with MAX driving.

 

Most where I go dont hit better than 13.9 @ 100. LS1 F-bodies are 13.3-13.6 and LS1 Vettes are just slightly faster at the track I go to. Temperature was 48 meaning humidity was very low. Do you have the track name and the time of day for the DA calculator? Even high humidity at 48 degrees is less than low humidity at 70 degrees.

Can you post your entire slip with the 60' marks?

Sounds like you can shift pretty well, even so your car should run high 13s on a normal day if not heat soaked which is pretty darn good.

 

The weather was 48 degrees at -529 FEET DA calc

 

Nice. The weather only helped you about a tenth of a second or so. Thats a good running car you have there.

 

I cant see the slip at work. Photobuckt is blocked. lol

 

with my stock L98 (expect flow masters and no cats) the best i ran was a 13.98@101 but with the ZF6 trans i have no traction off the line. so i would say a mid 13's LT1 would be a good time.

 

It's a good run, the car is working how it's supposed to!

 

Nice run

 

a very good time, with drag radials an Lt4 conversion kit from GM and a 150HP
shot of Nos, you would be able to have fantastic times and keep cost in check est about $ 3,000.00 for all mid 11's should be reasonable with this combo.

 

60=2.318
330=6.097
1/8=9.119
MPH=81.34
1000=11.706
1/4=13.869@104.59

OP: Your car is a good runner, as indicated by your TRAP; 104.6 mph. That's a good number. The trap is very indicative of HP and is not affected much by launch, shifting, etc. So you have a good running car there. HOWEVER:

60'=2.318

That is not good, and where you might focus your efforts at a future outing. Car should 60 2.0x easily, and .1 at the 60 = >.1 at the end of the 1/4. So if you could dial that 60 down to a reasonable 2.02, you'd basically run a 13.569@104, same day, same weather. Probably even a little better than than, b/c IME, .1 @ 60' = ~.13 @ the 1/4. Anyway, I've 1.9'ed my stock car, on stock street tires, so assuming you could run that, you'd be looking at something like 13.3's - 13.4's @104 which is great.

Cliff notes: Get your driving maximized and you've got a low 13's car -just what I said it should run, above.

 

Good run. Keep practicing.

 

tom400cfi i think you are reading the wrong numbers i believe he said his time was 13:59
at 103mph, ok.

 

Great 60' time for a first launch and no expirence and a manual tranny,
you have a lot of talent my friend most people with the torque these engines produce
are well over 2.20 so you have done a good job.

 

I think that you're right. In that case, the car is doing about as well as it can. Sorry....my bad!

 

As said....you 60 foots can come down and you CAN get a little better at the end.

One thing, most of the time when you hook well your MPH doesnt come up, it goes down.

 

That is a good 60 foot. It took me more than a few passes to get my first sub 2.0.

Given you DA at -500. I think your trap speeds should be quicker.
My Personal Best at a DA of 1470, is 13.38@almost 105. I over have 2MPH on you in the 1/8th. Same 60' time of 1.99.

Make sure you car is in top stock running condition. Fluids, plugs, wires,etc...

Get a manual fan switch, those high temps only hurt your top end.

I'd love to see what my 93 would do in -500 DA air.

As Tom has said, bone stock LT1/ZF6 cars are capable of low 13's with max driving. My car has more in it. I think at my home track I can get 13.2 with better driving. Faster than that and I need better DA. DA of 1470 is about as good as it gets at PRP.

A few and I do mean a few folks have broke into the 12's on street tires in stock trim. Mr. Mojo is one of them. He has MAX driving down and the track he is at (I think Englishtown?) is top notch and near sea level.

***Another thing, DO NOT RUN THE A/C in the staging lanes.*** At PRP that really ticks people off. The track rules forbid it. Your track maybe different, IDK. Manual switch is best.

 

SpidArman, Your vette will run 13.0s high 12s if you can get 1.8s 60ft. Island Drag is a higher elevation, I ran my car there a few weeks ago. they do a decent job of prepping the track depending on the event.
I slowed my car down (pulled out the GM847 cam, converted LT1 intake, 3" exhaust, and 3000 stall converter) The car have 105-106 MPH now. (It lost 10-12MPH) I ran 13.1s -12.8s the last few weeks. I rebuilt the trans a few months ago, and it has a converter that stall about 1800-2000 RPMs. My 60ft are 1.8s-1.79 that's on a plain radial tire.
I was at Etown the week before last, and they had the import VS domestic, it was a few vettes there, and I was watching there ETs.
One was a 08 ZO6 it ran 13.0s @ 122 and a 05 coupe w/ exhaust and cold air induction with tune and drag radials that also gone 13.0s @112 MPH. It was 42* that day, and Etown is 70 ft above sea level. The DA was good that day, my car went 12.8s w/ 1.79 60 ft
Randy