DomLS3

Yes, I know.. "not another launch thread "

I need some advice. I've tried just about everything there is to try. I have a 15 Z06, w/ Z07 and M7 trans. Mods are 2" Longtube headers, CAI, 2.31 upper pulley, short throw shifter and tune. Running on PSS 335's. Made 624/667 on a low reading dynomite dyno while running hot, so it's probably around 650ish.

Best I can hit is a 11.35 @ 127 with a 2.0 60'. I've only been able to hit less than 2.0 one time. I've tried launching at different RPMs (between 1000-3500), slipping the clutch, dumping the clutch (usually when I dump it, the clutch sticks to the floor and won't come back up for a while and I smell burning clutch and CEL comes on... wtf is that about?). I'm not even going to consider launch control as I've heard it's garbage. What else can I do to get this 60' down? I'm doing a decent burnout every time. I'm trying not to get DRs or different wheels (I'd like wheel/tire setup to stay stock unless someone can recommend a tire that's good for 95% daily driving and occasional 1/4 mile racing). I've seen posts of people hitting 1.6-1.7 60' BONE STOCK on the M7, so what am I doing wrong? I took the center wickerbill off the rear but that doesn't really help 60' anyway.

Please, spare the "it's a manual not an auto so it's going to be hard to get a good 60'." I know this already. But I feel like this car should be able to hit at least a 1.8 60' and in the 10's even with a manual. If people can do it with a bone stock m7 it can be done with a modded m7.

DebRedZR1

IN for the advice

Trackhawkz06

Im here for advice too.... I cant launch with either sets of tires... I either bog or spin! Hopefully the DSC contorller will give me a LITTTLE more grip at launch and save me!

"BoneStock"

this is going to be one of those things you have to practice. Its hard to get these cars out of the hole on stock tires. 1.8 60ft would probably be about the best you could get i think. The thing i would be concerned about is your trap speed is pretty low. You should trap 133+ unless the air is trash or you shift really slow. Try coming out around 2000-2500 and slip it a little. If the prep is trash you will never hook.

madrob2020

Dumping the clutch problem you posted doesn't sound right. If that's happening sometimes, I suspect your clutch may be slipping (bad from overheating, may be shot) & not letting it hook up correctly. I suppose you've checked fluid level/condition? Only other thing I have is try NLS to get thru gears quicker/speed up.JMHO

Bob U

I would try the GM launch control.
This would give you a baseline and it might work better then you think.

ronsc1985

It's like chicken soup, it can't hurt especially when you consider the OP's current 60 ft times.

ronsc1985

While 60 ft times have a big effect on ET's their effect on terminal MPH is minimal as long as you hook up early in the run.

MarkRacerX

NLS does wonders I will add ! You have to shift on the earlier side vs deep redline. Takes some practice but doesn't buck and pulls great, keeping momentum vs on/off shifting letting off and such.

My car was stock car on 18X12 reps with 335 Hoosier DR2s. 1st time out was bad prep lots of spin 11.6 @ 124mph 1.9 60' shifting normal , but fast as I could.

Next time out, better prep best of 1.778 60' and using NLS 11.139 127mph .

If you can't hook, def soo frustrating. Esp with your mods, some drag radials might be key.

I am in Spokane, WA track altitude around 2000' , not sure DA those days.

Good luck!

DomLS3

I should also add, DA was 1910. I was NLS on the 11.35 and 11.37 passes.

JMB

The trick with street tires is clutch slippage...start launching around 2000 RPM and slip the clutch while increasing throttle as the car begins to hook. Of course the tires must be hot and not too long of a burnout (the tires must squeal when you let off the brake). If car bogs too much, keep increasing launch RPM. This take a LOT of practice, good luck!

BWFitz

Rdubfalco

Tires make a huge difference!!

3 Z06ZR1

Stock M7 will not hit 133 !

"BoneStock"

no it won't. He clearly stated he has long tubes, intake, pulley, and tune. He should trap 133 on the low side.

3 Z06ZR1

He is a long way from 133 period.

"BoneStock"

yes I'm not arguing that at all. I'm saying he is either way down on power, heat soaked, or grannyshifting. That set up should easily go 133.

3 Z06ZR1

Here is 636rwhp headers and Halltech
intake.

"BoneStock"

ya that's a basically the same power he made. I'm betting he is heat soaking bad since he pullied the stock blower without meth.

Bob U

The best way to get educated is to ask some of the fastest Z06 M7 drivers on the List.
Maybe they could come into this post and give us some advice and their techniques.
Guys like;
Stock;
VinnieA 1.664
Joetib07 1.776
quicksupra 1.650

Stock plus Tire;
anti_venom 1.539

Modified;
Fasterproms 1.481
marco0779 1.464
ncrowe 1.549
2015_ZOSICK 1.594