1/4 mile in south florida
 

Is this a possibility that in the summer time in Florida it's normal to have a slower time due to the heat? I have mod's done and cannot get it better then 13.8

In very hot weather you can be 3/10 slower. That still puts you in mid 13's. You either can't drive, or your mods don't work together well, & you're actually losing H.P. I would contact Jnaut. He has a performance auto shop. Check your 370z site. His car does low 12's with just mods......

I went to the track when it was 102 out and I have a vert with full exhoust and test pipes and I hit best 13.8 that day. I had no oil cooler and my car was running at at Least 240 deg. The whole day :(. But yea if it was cooler out u would def. Hit better #s. What is your 6o foot and what is your mph speed?

60 foot I dont remember but mph was 102. I have GT Haus meisterschaft exhaust, headers, gen 3 intake and getting hfc's put on friday and uprev saturday.

wait until it cools off and try again. also, you want your oil temp gauge below 220, preferrably 180-200 before starting the run. The ECU starts to pull power at 220, possibly a little before but by 220 its seat of the pants noticable. Oil cooler barely helps in situations like the drag strip because of limited airflow... your mostly putsing around the return lane and pits heat soaking up everything, and the only time you have airflow you are at full throttle anyway... so let the car cool off to 180 oil temp before getting it ready to line up, so its hopefully still under 200 by the time you start the run.

And if your 60' isnt in the 1.8 or better, you need to work on your launch. I was able to get 1.88 and 1.89 on bald stock sport wheels/tires with a stock car, so you should be able to do better than that if you have some decent tires.

stock trap is 107...how are you 5 mph slower? lol

The tires I got are stock from when I bought the car. Also, I don't spin the tires with a burnout before I pull up to the line. I just pull up and start in my 1st gear. Tires are too expensive to do burnouts in this car lol. I may not know how to drive the 1/4 mile properly lol.

"tires too expensive":confused: "I may not know how to drive" :D

Do what other guys that can't drive do, get TTurbo:)

The best I could trap when it was hot outside was around 103.xx for temps in the 80's and 90's. That was with a stock 7AT and all season tires.

First time ever drag racing last Friday and I ran a 13.809 and the car is 100% stock. Hopefully I can do better once I figure out what the hell to do!
:)

When 5 of us went to the track we all had a trap speed of 102 including a Nismo and we all had bolt ons. Only person that ran 12.9 was chuckd that day with a 109 I believe . Cars dint wanna run. We had 3 manuals and 2 autos. My best 60 was 2.1 with the stock vert wheels and tiers (they suck).

so what the hell..........we got stock z's running 13.1 and bolt on z's running high 13's. The tires the car comes with are no good I'm assuming? I hear guys tellin me I should start in 2nd gear and start. I am putting HFC's on tomorrow and uprev this saturday in Tampa.

I'm assuming the better times were in much cooler weather. The difference in my times between hot and cold temps was around 0.5 s.

What tires should I be looking for? All season? Summer? Any specific brand? I mean come on with my mods I should be high 12's low 13's.

What mods do you have?

Drag slicks would give you the best times, but other than that you definitely want summer tires. I think the Bridgestone RE-11's are pretty popular around the forum.

My mods are......GT HAUS MEISTERSCHAFT EXHAUST, GEN 3 INTAKES, HEADERS SO FAR. Tomorrow I am getting HFC's installed and this Saturday uprev tuning.

:iagree:

J Spec Automotive Inc.

He's worked on my Z, and look at my 1/4 mile time in my sig. ;)

:iagree:

160F to 180F seems to be the sweet spot for my car for good runs, anything more than that and your ET's will suffer. There is definitely a noticeable power drop on the butt dyno above 200F. I usually wait a minimum 30 minutes between runs. Ideally 45 to 60 mins between runs for best results.

The tune should make a big difference with your mods. You should come up to PBIR/Moroso once your Z is tuned. :tup:

PBIR/Moroso?

Yeah, pretty much the only 1/4 mile track in south florida...

Ouch at 102mph...that's bad. I thought my 107mph was garbage, if I trapped 102, I would have traded the car in that day. However, I am willing to bet your oil temps were pretty high and the ECU was cutting power. Hell, my 107 traps were on 210-220 degree oil temps.

Temp was 220-230. Bradenton motorsports park has 1/4 track. Just put in my hfc and getting uprev tomorrow.

You're from the Tampa area?

Yeah I'm in sarasota. How about you? Heading to Tampa tomorrow morning for uprev.

I'm in the West Palm Beach area... about 20 minutes from PBIR.

So how much difference did the flywheel do and what does it do?

Yes.

You are probably making about 10-15% less whp thanks to the heat and high humidity -- less actual g/sec of usable air are being drawn in because of heat expansion and high water content.

Over sucessive runs, unless you are misting the IM, it will be even worse due to heat soak. Your air temps are probably well over 120* F.

Go back in the "winter" and you will be happier with your time.

I find this fascinating-I won't comment-just want to understand more
 

It's not my place to comment on this forum. I'm just so fascinated.

Are you asking what a flywheel does? You admit that you don't know how to do a burn out. Don't know how to drive. Spending/spent thousands on mods/tunning & I assume you don't know what they do, or if they are helpful. Am I getting this right?

Is there a better place for him to ask these questions and learn?

I was just gonna say, excuse me for not knowing every detail about mods. I know a few here and there but no need for you to come in here and start making fun of people. I thought this is a place for people to go to to learn and 99.9% are very helpful and I guess that andre guy is that .1% so my suggestion to him is...........get in your old 2008 350z and dream of having a 40th anniversary z. I rest my case lol.

Sorry
 

I'm just a guest here, & should not abuse that privilege. It's just that your story started with a car being slower on hot days. As time went by, your story developed, at least to me, into fascinating & compelling reading. I'm sorry if I hurt your feelings. Please continue with your story.

stock flywheel is 30lb and most aftermarket are about half that. less rotating mass improves the responsiveness of the motor. I like it more than the high flow cats i have.

It was the temps and lack of track experience. It happen to me. Check out my mods down below. The best I ran at EnglishTown with the rest of the guys was a 13.9 at 102ish. The temps where in the high 90's almost 100. Humidity was near 100%. Wanna know what made me happy???? Me and my fellow Z buds were running faster times then SRT8 Challengers, Brand New V8 Camaros, 2000-2001 Trans Am's, and chuck put the smack down several times to a modded C5 Z06. Everyone was running like crap that day, but the Z's where doing it a little better :)

So I hear the Mustang dyno likes to show higher number then what the car really has........

Another 40th around here? Great.... :shakes head::icon17:

I'm in Clearwater. Where did you have your car tuned at?

I've heard the opposite. Either way my car has never been on a dyno anyway.

Tuned at zfever in Tampa. They told me mustang dyno is the worst if u wanna see true numbers. It's good if u want to see fake numbers lol.

Let me know when you head to Bradenton... I'll EVENTUALLY get my car out there.

I live in sarasota. I may go to the track tomorrow night not sure yet.

Usually mustang dynos read lower than dynojet. (However, depending on how the dyno's load is configured, it can skew the numbers a bit).

321RWHP and 102mph traps? God damn.

What #'s did you make before the tune?

:iagree:

Stock, I did 13.7 @ 103mph. Bolt ons and a tune, I did 13.3 @ 107mph with 293whp (my car must be the oppostite of a factory freak, haha).

I'd love to hear this car though...I've always wanted to hear the Meisterschaft exhaust in person.

no that was before tune and before headers