Earlier in the year I ran a 13.9 with just a JWT Pop Charger, 100Octane and 20psi in the rear tires. Keep in mind it was 68Degrees out.

Tonight the best time i could get was a 14.376 everything exactly the same except it was 80degrees out here in FLORIDA. Does the heat make that much of a difference. Help me out tell me what im doing wrong

9:01 PM 80Degrees
R/T .358
60' 2.352
330 6.305
1/8 9.447
MPH 79.21
1000 12.125
1/4 14.376
MPH 100.30


FIRST run 7:30 PM about 85degrees

R/T .093
60' 2.408
330 6.362
1/8 9.493
MPH 80.73
1000 12.156
1/4 14.398
MPH 100.90

IS IT ME OR THE HEAT?

 

oh yea ...... 03 Performance 6mt

 

come on.......anybody?

 

In my opinion, I don't think you should be using the 100 octane, but using pump gas to improve your skills on. Using 100 octane causes the engine to rev faster and increase its strength, thus not very useful when it comes to honing your skills.

You think an 85 degree weather is bad? Last time, which was also my first time, the weather was in the high 90s and low 100s and with lots of humidity. My best was 14.021s @ 101.39mph on pump gas.


But anyway, onto your time slip. I am by no means an expert. From the looks of it, your 60' need lots of work. If you're on street tires, you should pull a 2.2. As long as you launch it well, you should be fine.

 

ok well the 100 octane is pump gas, its racing fuel not OCTANE BOOSTER, and a 14.0 on a day in the low 100's with lots of humidty on a stock Z, for some reason this just doesnt sound right. and yea i agree i need to work on the 60' foot but i really doubt the 2 gallons of racing fuel mixed with 1 gallon of 93 octane is hurting anything

 

What rear wheel specs?

 

?

 

Agree.

Heat and humidity (which you do not mention) kill ET. I give myself 0.5 seconds grace for poor weather. But your problem is not weather. In the second 660 feet you pick up 20 mph. That is OK. Your problem is 60 foot times. Street tires are capable of 2.0 seconds. In other words the Z is capable of 13.9 seconds.

 

What should i launch at, im revin to about 1,800 RPM, but i feel like im spinning way to much for 20PSI in back tires.

 

You are going to have to play with psi and rpm. I have never run 20 psi. I like 25 psi and 2,500rpm. Just experiment and have fun.

 

you might have to drop it lower than that. i used to launch my mustang at like 1500 for traction issues. that was a v8 though. i would try different launch techniques to see which one works. try different rpm's until you find the right one you can use for a good 60ft time. a 2.3 60ft isnt terrible but can be worked on.

 

Right, 100 octane is racing fuel. I don't think it's considered pump gas, really. If it is, I meant practice with 93 octane before using race fuel. I never said it was going to hurt anything, I was just simply stating that you should practice and get the hang of everything on regular 93 octane before going up to racing fuel. And who said I was stock? Well, I'm almost stock (popcharger and mrev2 that were offset by heavy rims).

 

try looking at that 60 foot the 2.3 is a bit better than that 2.4 and that makes a big difference... and by the way if you bring down your 60ft from the 2.3s which will be easy you will be running some great times with just a popcharger on your car

 

yeah i am in florida too, the heat plus humidity KILLS your times during this time of year, i can easily be a half a second in the quarter mile from winter to summer...


work on that launch, try not to spin soo much off the line...!!!

 

oh its cool, maybe it would be a better idea to start using the 93 save a little money haha

 

yea, my buddy video it and im spinning alot more than i thought, i just cant believe it with 20psi im spinning like that, i think ive seen your ride before out at BITHLO speedworld. You were running nitrous and i thnk you had some MT on the rear.

 

yea im going to play around with my tire pressure and launch at different rpms, ill keep you posted thanks for everyones imput....later off to work

 

80 degrees is not that hot, we had stock Z's at our track day in 87 degree heat and nasty humidity running 14.0's and even hit 13's. Like mentioned work on your launch and first 2 gear shifts. Your 1/8 times are very slow even taking your launch into account. Keep practicing and by the time the weather cools you'll be ready for 13's...

 

the weather was horrible for racing here yesterday. my cobra would have been down 3mph in this weather. i was out there....with a busted starter(that decided to crap out right when i got there). good thing i have friends to push start me

 

I don't know how long you've been drag racing, but it takes alot of seat time to get a good feel for your car. This is my third season in the z and i'm just now finding out what works and doesn't work. Every time you go to the track take notes on what you tried, i.e. tire psi,launch rpms, shift points in each gear, etc. Practice,practice, practice!