went to the 1/8mile track

[gimp19]

The best I ran was a 8.714 at 64.28mph with a 2.656 60ft that was against a 2001 Steeda mustang that beat me with a time of 7.915. If I could get traction I might be able to take him off the line.

Anyone know where I can find the stock performance specs for my car?

[BadWS6]

I have only had my car on the track three times for a combined 20 runs and I cannot get a launch without wheel spin I am thinking about getting some drag radials

[hotwhip9]

I don't know about the stock specs, but with those times you should have a decent 1/4 time. My 1/8th times were 8.986 @83.25mph, the 60ft was 2.293 with no traction at all. I mean . 1/4 time was 13.738@102.69mph

[Injuneer]

The best I ran was a 8.714 at 64.28mph with a 2.656 60ft that was against a 2001 Steeda mustang that beat me with a time of 7.915. If I could get traction I might be able to take him off the line.

Anyone know where I can find the stock performance specs for my car?

There's something wrong with those times.... if you convert to the equivalent 1/4-mile performance....

8.714 X 1.55 = 13.50
64.28 X 1.25 = 80.35

Are you sure it wasn't more like 84 MPH? Or you got off the throttle before the finish line.

And even that boggles the mind.... a stock LT1 will run 14.0@98mph with a "good" 60-ft time - and that means something close to 2.20. With a 2.656 60-ft time, you would have lost about 5/10ths in an 1/8-mile, and 7/10ths in a 1/4-mile ET..... you would have been closer to 14.7-sec in the 1/4-mile with a "stock" car, so you can see why a 13.5 sort of looks incorrect.

[BadWS6]

My best 60ft was 2.261 trapped @ 14.8 @ 92.8

[ryan34]

I think the stock specs, on a early LT-1 are 275 hp and 325 torque. 96 and 97 had an extra 10 hp, and WS6 i think is rated at 305 hp. Not sure on the torque though. Not sure of the weight although 3600 lbs. seems to be a reasonable guess.

[tclelland]

I'd like to get an "official" measurement on that 1/8 mile track.?!

[fastTa]

The ET is feasible. The MPH seems far too low. Using a formula to calculate 1/4 mile ET's based on 1/8 mile ET's in not accuarate. Take a look at the ls1tech.com timeslip database. There is a variance of the multiplier anywhere from 1.498 to 1.587. Granted these are the extreme differences but even within the median multipliers, there is a significant variance.

The formula is no doubt very handy to roughly estimate 1/4 mile ET's but is by no means a "Rule of Thumb" type calculation.

[Injuneer]

The ET is feasible. The MPH seems far too low. Using a formula to calculate 1/4 mile ET's based on 1/8 mile ET's in not accuarate. Take a look at the ls1tech.com timeslip database. There is a variance of the multiplier anywhere from 1.498 to 1.587. Granted these are the extreme differences but even within the median multipliers, there is a significant variance.

The formula is no doubt very handy to roughly estimate 1/4 mile ET's but is by no means a "Rule of Thumb" type calculation.

You might want to explain that to NHRA. The "class index" for Comp, Stock and Super Stock classes is based on numbers in the 1.55 - 1.58 range. The conversions in the rule book for 1/8-mile tracks vs. 1/4-mile tracks are based on those numbers.

Based on time slips I've collected and analyzed, its a very reliable "rule of thumb"

You don't seem to like most of my mathematical approaches to thing, but I wouldn't use them if I didn't have the data and the technical knowledge to back them up.

If you could explain to me how an absolute stock LT1, pulling a 2.6-sec 60-ft time, can run 8.71 in the 1/8th mile, at only 64mph, I'll be glad to listen.

[hotwhip9]

I think it was a typo, probably meant 84.29 Wouldn't that make it seem more realistic?

[tclelland]

If you could explain to me how an absolute stock LT1, pulling a 2.6-sec 60-ft time, can run 8.71 in the 1/8th mile, at only 64mph, I'll be glad to listen.

Listen???....I'll lend you my car if you can install the magic spell that makes this happen. Forget the MPH, I want an explanation on the 8.71 with the 2.6 on a stock T/A. I must be doing something wrong.

[gimp19]

There was no typos, all day long I ran in the upper 8's at between 62-64mph next time I'm gonna take alook at my speedo.

While on the subject anyone got a suggestions on drag racing an auto, I'm having problems lauching without breaking my tires loose really bad witch probly explains my bad 60ft time. I was also wondering what gear or gears are best to use, I seemed to run a little faster leaving it in plain drive (3rd gear) rather then using overdrive.

[fastTa]

There was no typos, all day long I ran in the upper 8's

Like gimp19 said, NO TYPOS. Once again, take a look at the ls1tech.com timeslip database. A significant number of the cars running mid to upper 13's (which most cars by the way are stock) are pulling 8.80 - 8.85 1/8 mile ET's. Out of the 100's of 4th Gen f-body LT1's that I have seen run at San Antonio Raceway in the last 10 or so years, the only ones that were handed a 14 second timeslip were those who were experiencing really bad traction and those that couldn't drive.

Let's take for example a car running an 8.850 1/8 mile time. If we were to use the standard formula given the 1/8 mile ET and plugging in the values of the multiplier ranging from 1.498 - 1.587, we could end up with a 1/4 mile ET calculation of anywhere between 13.257 - 14.040. You call that Rule Of Thumb?? Hardly.

Mathematics can be great tools for building cars and drag racing, unfortunately they can not account for the 1000's of variances in the real world at track to track and from car to car.

[Injuneer]

Say what you want.... I've got the statistical numbers from a lot af actual timeslips for 4th Gens running 8.6 - 14.8-second 1/4-miles, and not some "claims" that people post on the Internet. That includes blower cars, nitrous cars and NA cars, and there is very little variance, except where people screwed up, or broke. I've used this analysis for years, and you are the first one who has ever had a problem it. And I didn't make it up.... its a "standard" approach used by many people. NHRA data uses and supports the numbers, but apparently you discount that like you discounted my post about ".000" being a perfect reaction time.

Your analysis indicates an LT1 will only run over 14.0 with "bad traction and those that couldn't drive."..... If we take that as a given, and I don't.... he had a 2.656 second 60-foot. I call that "bad traction". You can NOT run a stock LT1 in the 13's with a 2.656-second 60-ft. And you seem to discount the 64MPH number..... have you ever actually looked at an 1/8th-mile timeslip? If you have, you'd know why it boggles the mind. After 40 years in this sport, these numbers make no sense at all.

But, believe what you want. :shrug:

[fastTa]

You know what boggles my mind? Every time someone seems proud and excited about posting their 1/4 or 1/8 mile times, the first thing you (Injuneer) do is jump all over the accuracy of their times.

That is a sure way to make someone feel unwelcomed to the board.