Ah, the test pipes again.... Tempting

 

Oh chit didn't realize you're in Cali. Yeah id go with hfc's in that case too then.

 

congrats on the numbers! i had stillen intakes, headers and HFCs with the nismo cat back and i pushed 294.5 whp... but i felt quite a bit of restriction - swapped to stillen true dual cat back and gonna go in for a retune in a few weeks. i too hope to break that 300 mark.

ran a 13.98 on the track runnin on hankooks @ 40psi (tire pressure) and 285s in the rear. definitely spins quite a bit. best way to launch with the HR (imo) is below 2500 rpms. i launched at 1800 and got the 13.98 otherwise i would average 14.4s but spun a lot at the line.

 

14.4 Is horribly slow, I would work on driver mod..

LOL @ launching 1800 RPM.... If your close to 300whp you should be deeeeep into the low 13's...

Why the hell are you running 40psi?? You should be launching at MUCH higher RPM, slipping the clutch and running 20-25psi for traction.... The launch is the single most determining factor in your ET

 

as far as lower HP reading with in a hotter day goes with different mods, I've heard a car loses approx. 1% power per every 10 degrees of heat. So 15 degrees hotter would be about 4-5 hp loss according to this formula.

Launching: I'm not running 13.1 quater miles but I find that launching at 3k and controlling the spin give me a better 1/4 mile time at 13.3-13.4 where as launching at 2.5k bogs the car and I end up running a 13.7+

I probably have killed my bottom end power though with hfc, catback, intakes, and light weight flywheel

btw, my tire pressures at 33-35 on 245

 

Did z car garage have everything there for the tune? What did it run you

 

sweet my G is at ZCG as we speack getting a smaller pulley a tune and a few other goodies done. Its been there for a couple weeks but i hope its worth the wait

 

didn't have a air compressor to repump my tires up and didn't want to drive 40 miles home on 25 psi.
and my tires hankook evo 12s lost more and more grip as the tires got more hot. so when i launched above 2500 rpms i would just spin for a solid second (hence the 14.4s) once i started easing into the start (less spin) is when i broke into the high 13s i definitely aim to be in the low 13s... second time out on the track for me so i know driver mod is best mod at this point. last year i only ran her twice til my concentric slave cylinder (recall) went out.

 

Please refrain from giving drag racing advice when it is clear you cannot do it well. Ok. Thanks.

 

i have an 08 with nismo intakes, nismo catback and berks high flow cats. I ran the car for the first time best times was a 13.888 @101.61. i have not had it tuned yet. i know in my rx7 i ran low 13.s at this mile per hour. my question is what rpm are you guys shifting at i was shiftin right at 8k. also my 60' were mainly 2.2 slipping the clutch

 

If you are shifting at 8k you are tuned....

Odds are you aren't making power that high. I really only rev out 1st to avoid a power drop in 2nd, usually shifting around 7400 is best for area under the curve.

I was able to manage a 2.05 60' on some worn out hankook V12 285/30/19 tires, ran a 13.4@104 basically stock. It's all in the launch.

 

the car will miss every once in a while.i would pull 1.7 60 ft in my rx7 with drag radials so i am on the hunt for some
drag radials right now. best 60 ft i pulled so far is 2.2. ran it 4 times. going again this friday. i will try shifting it sooner and see what happens

 

also i iam shifting at 7500 rpm sorry about that not 8k like i said earlier

 

If you aren't tuned then you gotta shift a little early, the car starts to close the throttles before 7500. I'd say about 7100 or so is best.

 

God Damm ETB's!! >(

Anyone have a dyno graph of a stock HR? I would like to see where our power band drops off at

 

Dynojet:

https://my350z.com/forum/engine-and-...e-dynojet.html

Dyno Dynamics:

https://my350z.com/forum/engine-and-...line-dyno.html

 

HFC's are just as illegal and will not pass emissions either.

 

Yup @ Steve Kan's around early Summer. Though it is cooling down

 

Technically HFCs are illegal here in Calif. I have Fast Intentions 300 cell HFC and it's illegal here. Having said this..here in Ca, they are changing the smog test to OBD ONLY in 2013. This means NO SNIFFER..and since I have defouler set up, there is no CEL either. So when I test in 2015, I fully expect to pass. There is a visual as well, but they wouldn't know an HFC from a real cat if it bit em in the A$$.

 

my z is stock i do 13.8 at 1/4 mile i want to put the cold air intakes headers and a bottle does any of you know whats going to be my time ? ill be happy if i brake 12s lol