desi

Last night I went to the track for the first time. Here is my best and worst runs for the night.


Run # 1 has a much higher R/T, yet much lower 1/4. How does that work? Car is automatic, so all I had to do is floor it.

If ran with G-Tech, does it mean I would get a (15.891-0.791) = 15.1 sec? That would make more sense as last year I was running 15.5 when the car was completly stock.

Car simply does not pull from idle to 2500 RPM. 2500 - 4500 it pulls good. Time to finally change the heads.

BTW, had a great time at the track.....even though had to drive for 2+ hours to get there

comp

R/T is the time it take's you to leave ..ET is the time it take you to get there

desi

Is R/T included in the E/T?

biff85ta

No your reaction and et are two seperate things.

desi

Me gonna go try the G-Tech tomorrow.

I should have taken it to the track when I first bought it. That would have given me a good base line. Now I will never know how much improvement there has been since the upgrades

biff85ta

You need to get some vortec heads and a better cam. You could really wake it up. The 260h isn't much bigger than the stock cam on my 305 in my 85 TA.

Chuck Gongloff

Reaction time is the time it takes you to "break the beam/start the timer" from the time the light turns "green".

ET is just that, your time in the quarter mile from the time you break the beam at the starting line till you break the beam at the finish line.

Theoretically, you could be staged, the light could turn green, and you could sit on the line for one minute and smoke a cigarette. You could then "start" and break the beam.

Your RT would be 60 seconds, your ET would still be in the 15 sec bracket. Make sense? Chuck

Jvette73

Put a 2500rpm stall convertor in it. That will help it launch better and be pulling right out of the hole. It will make a big difference. It should improve your et by at least a 1/2 second, (5 tenths). Were you shifting it or just leaving it in D and letting the tranny shift when it wanted? If the tranny was doin the shifting, what rpm did it upshift?

WA 2 FST

FWIW, the G-tech is a decent gadget, but it is not nearly as accurate as track timers. From what I've seen the G-tech typically reads a bit quick in ET and MPH is also a bit higher.

And the others are 100% correct. RT is independent of ET. You could have a 2.xxx second RT and still run the same ET as on another run.

American Boy

You just started the phenomenon of need to go faster.

Next thing you know, you're comptemplating the 502 cu. in. and blowers with coming out of your mouth... It never end...

That's so much fun

Stephan

American Boy

A close friend of mine put is G-Tech on at the track and the difference between the two was within 0.2 sec always. The reason for the MPH to be quicker is that the G-Tech give the speed at the end of the quarter vs the average of the final 60 ft or so at the track.

It's close enough in my book.

Stephan

SuperFast80

desi, 2 important things I think you may have missed:

1. You should have launched with a brake stand for stronger launch. You have a factory (1800) stall and 3.08s (or 3.07s I think) - you need to hold the brake down to the floor and load the converter for launch.

2. You have cammed the engine to make its peak power higher than where your TH400 shifts if you leave it in D. You should have launched in 1 and then shifted at the top of the band.

Before you do anything else, you should try these. I swear to you that if you didn't do either, you left at least a 1/2 second on the track. I was running similar power to yours when I last went 2 years ago and with a 2600 stall and 3.55s to help launch, I ran 14.6x/94.x all day.

SuperFast80

BTW, your 60' times of 2.5 and 2.6 secs were awful, but clear indications that your launch is killing you. ~92-93mph is about 8-10 mph faster than most guys who normally run 15.9/16.0.

Keep trying. I am guessing you are set up for about 14.9-15.2.

SuperFast80

BTW, in run #1, what/who was running beside you? He was 0.7 better than you but running the same trap speed.

desi

Well guys, I am changing the heads this winter to Sportsman IIs. Putting a bigger cam (whatever MotorHead recommends, possibly solid lifters) in and chambered pipes.

First cam I did was just for ****s and giggles (wanted to learn). I bet my stock mufflers don't help either One guys shaved off 1/2 sec just by taking his baffles out!! Mine is probably worse.

Superfast80, I did not shift manually either, nor did hold the brakes. The combo of TH400, 1800 stall and 3.08 is obviously not the best

It's gonna be a busy winter

desi

It was a Rustang.....some ole guy. Faster car, but the crowd liked the Vette better

Stewart's74

Way to go Amir.... Now you have a baseline. With your winter upgrades you should have a pretty strong performer next summer.
Also...you have a great wife...Mine wont let me go to the track
I guess I'll have to send her on a shopping spree with her girlfriends to get her out of town for a weekend.

75 Stingray!

My car doesn’t rust and I'm 22!

desi

I won't argue that one bit.

For you, give her a choice of drag strip or strip joint....see which one she picks

Paul L

Chuck,
So the 1/4 mile time has nothing to do with the reaction time? In other words I could have a cigarette on the line and still post a better 1/4 mile time than the car next to me. Would I win? The question begs the next question: why bother being quick off the line if the reaction time is not factored in?