The Official 370Z Autocross Thread

Chriz · 05-18-2011, 01:51 AM

Hey you guys, im autocrossing the Z for the first time this week, any recommended tire pressures for stock re050's?

ChrisSlicks · 05-18-2011, 08:09 AM

Quote:

Originally Posted by Chriz

Hey you guys, im autocrossing the Z for the first time this week, any recommended tire pressures for stock re050's?

Start with about 40 up front and 35 rear and see how you do and check the roll over.

AutoX Z · 05-18-2011, 09:09 PM

What Chris said will work, where are you racing at in Houston?

Chriz · 05-19-2011, 02:51 PM

Quote:

Originally Posted by AutoX Z

What Chris said will work, where are you racing at in Houston?

I'm actually heading to San Antonio to visit some friends and autocrossing at Retama Park hosted by sasca/spokes. Won't be my first time autocrossing but ive never taken the Z yet. I can't wait! Iv'e only driven a bone stock civic si and won novice class with it, so im expecting quite a difference.

I'ts also alot cheaper in san antonio compared to Houston. Only 25$ for non members. And thanks for the info Chris!

AutoX Z · 05-19-2011, 09:28 PM

Quote:

Originally Posted by Chriz

I'm actually heading to San Antonio to visit some friends and autocrossing at Retama Park hosted by sasca/spokes. Won't be my first time autocrossing but ive never taken the Z yet. I can't wait! Iv'e only driven a bone stock civic si and won novice class with it, so im expecting quite a difference.

I'ts also alot cheaper in san antonio compared to Houston. Only 25$ for non members. And thanks for the info Chris!

Well make sure to make it out to some Houston events too. The SCCA club here puts on first class events with some great competition and friends mixed in.

Shamu · 05-20-2011, 12:13 AM

You guys in Texas see my old FP Boxster yet?

YouTube - ‪FP #111 Texas SW Divisional Best Run‬&rlm;

Chriz · 05-20-2011, 02:09 AM

Quote:

Originally Posted by AutoX Z

Well make sure to make it out to some Houston events too. The SCCA club here puts on first class events with some great competition and friends mixed in.

I definitely plan to. Ive heard good things about Houston SCCA

Chriz · 05-20-2011, 02:17 AM

Quote:

Originally Posted by Shamu

You guys in Texas see my old FP Boxster yet?

YouTube - ‪FP #111 Texas SW Divisional Best Run‬&rlm;

Is that you driving? Ive gotten rides in Erik Strelnieks's RX-7 before, and man can he drive.

AutoX Z · 05-20-2011, 07:30 PM

Quote:

Originally Posted by Shamu

You guys in Texas see my old FP Boxster yet?

YouTube - ‪FP #111 Texas SW Divisional Best Run‬&rlm;

Yeah, they had it out at a divisional last weekend. Got second in FP I think? behind the Berry's EVO.

Shamu · 05-20-2011, 11:04 PM

Quote:

Originally Posted by AutoX Z

Yeah, they had it out at a divisional last weekend. Got second in FP I think? behind the Berry's EVO.

First day was sort suspension day - car was over steering badly. Second day with rear bar adjustment he was fastest FP car. And yes that's Erik.

handyman · 05-21-2011, 04:26 PM

I'm going to continue to share my experiences, hopefully they will help others in the future:

Alignment makes a HUGE difference. I went to -0.06* toe (out) in the front and -1.2* rear camber, left everything else stock, and suddenly the car has TONS of oversteer! So much so that I just lost to a bunch of Miata guys I've been easily beating for the past few weeks. It's good news because I should be able to reel it back in with a bigger front sway bar, which will help with overall stiffness and rear end grip as well. But until my front bar comes in, I'll be tuning the alignment back closer to stock (+.03* toe (in) in the front and -1.4* rear camber) to keep it under control.

If you are fighting understeer on stock (or otherwise staggered) tires, an alignment may be a cheap way to solve your problem.

cossie1600 · 05-21-2011, 05:56 PM

1.2 camber in rear seems little

handyman · 05-21-2011, 08:05 PM

Ideally I would like something like 2* camber all around, but since I can't get any more than 0.8* in front, I'd rather have balance than 0.8* in front and 2.2* in back (what it was stock)

cossie1600 · 05-21-2011, 08:49 PM

Camber is not like tires, you don't need square setup....

handyman · 05-21-2011, 09:23 PM

True.

Here is my logic: Increasing rear camber increases rear cornering grip while decreasing acceleration grip... if you are having trouble with understeer, and can't increase front cornering grip (in this case by increasing front camber), you must decrease rear cornering grip to achieve balance. You might as well decrease rear camber to sacrifice some rear end cornering grip for an increase in acceleration grip.

And to be honest, you don't need a square setup with tires either, you need a setup that addresses the needs of your car and driving style

05-18-2011, 01:51 AM	#406 (permalink)
Chriz Track Member Join Date: Dec 2009 Location: Houston TX Posts: 626 Drives: '10 370z PW 7AT Rep Power: 17	Hey you guys, im autocrossing the Z for the first time this week, any recommended tire pressures for stock re050's? __________________ PW 7AT w/Sports Pkg Hook Em!

05-18-2011, 09:09 PM	#408 (permalink)
AutoX Z Enthusiast Member Join Date: Jun 2009 Location: Houston, Tx Posts: 314 Drives: 370Z Base, Sport Rep Power: 16	What Chris said will work, where are you racing at in Houston? __________________ 2013 SCCA Solo National Champion VVV For Sale VVV

05-20-2011, 12:13 AM	#411 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 19	You guys in Texas see my old FP Boxster yet? YouTube - ‪FP #111 Texas SW Divisional Best Run‬&rlm; __________________ Grant

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05-21-2011, 04:26 PM	#416 (permalink)
handyman Base Member Join Date: Jun 2010 Location: WV Posts: 45 Drives: 370Z Rep Power: 15	I'm going to continue to share my experiences, hopefully they will help others in the future: Alignment makes a HUGE difference. I went to -0.06* toe (out) in the front and -1.2* rear camber, left everything else stock, and suddenly the car has TONS of oversteer! So much so that I just lost to a bunch of Miata guys I've been easily beating for the past few weeks. It's good news because I should be able to reel it back in with a bigger front sway bar, which will help with overall stiffness and rear end grip as well. But until my front bar comes in, I'll be tuning the alignment back closer to stock (+.03* toe (in) in the front and -1.4* rear camber) to keep it under control. If you are fighting understeer on stock (or otherwise staggered) tires, an alignment may be a cheap way to solve your problem.

05-21-2011, 05:56 PM	#417 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	1.2 camber in rear seems little

05-21-2011, 08:05 PM	#418 (permalink)
handyman Base Member Join Date: Jun 2010 Location: WV Posts: 45 Drives: 370Z Rep Power: 15	Ideally I would like something like 2* camber all around, but since I can't get any more than 0.8* in front, I'd rather have balance than 0.8* in front and 2.2* in back (what it was stock)

05-21-2011, 08:49 PM	#419 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Camber is not like tires, you don't need square setup....

05-21-2011, 09:23 PM	#420 (permalink)
handyman Base Member Join Date: Jun 2010 Location: WV Posts: 45 Drives: 370Z Rep Power: 15	True. Here is my logic: Increasing rear camber increases rear cornering grip while decreasing acceleration grip... if you are having trouble with understeer, and can't increase front cornering grip (in this case by increasing front camber), you must decrease rear cornering grip to achieve balance. You might as well decrease rear camber to sacrifice some rear end cornering grip for an increase in acceleration grip. And to be honest, you don't need a square setup with tires either, you need a setup that addresses the needs of your car and driving style