G37 Track Set Up. Oversteer Help.

Hotrodz · 01-05-2022, 05:10 PM

You need more spring up front rear okay, get some trackable coilovers. If you are running r compound tires you need to shoot for tire pressures between 34 and 36 hot. Your ride height should be within an 3/4 of OEM. Get all SPL suspension components as mentioned. Camber in the rear is okay and you need at minimum -2.5 up front. As was mentioned, the brake pads you are using are very aggressive and should only be used with r compound tires or slicks. Xp 10 and 8 are just fine. I ran them on my boosted Z with r compound tires even when I got to HPDE 4 and was carrying some speed.

If all else fails or you don't have the money to get your suspension setup properly, go back stock or close as possible. Then change one significant component at a time.

Sent from my SM-G965U using Tapatalk

2.2Lude · 01-05-2022, 05:32 PM

Quote:

Originally Posted by Hotrodz

You need more spring up front rear okay, get some trackable coilovers. If you are running r compound tires you need to shoot for tire pressures between 34 and 36 hot. Your ride height should be within an 3/4 of OEM. Get all SPL suspension components as mentioned. Camber in the rear is okay and you need at minimum -2.5 up front. As was mentioned, the brake pads you are using are very aggressive and should only be used with r compound tires or slicks. Xp 10 and 8 are just fine. I ran them on my boosted Z with r compound tires even when I got to HPDE 4 and was carrying some speed.

If all else fails or you don't have the money to get your suspension setup properly, go back stock or close as possible. Then change one significant component at a time.

Sent from my SM-G965U using Tapatalk

Bumping up the tire pressure up front did help so I feel like more front spring or bar would also help but I don't want to be chasing my tail. I want to add more negative camber upfront(-2.5) to help tire wear but It will just give me more traction up front relative to rear making my current oversteer issue worse.

I was originally wanted to go with the R10/R8 combo but the Z1 guys said while those compounds worked well for the Z, they weren't enough for the heavier G. Might need to step back down.

The "best" tires that I'll put on this car will a 200tw "cheater tire". Something like a RS4 or N'ferra. No R compounds are in the plans for this car.

Hotrodz · 01-05-2022, 06:19 PM

Quote:

Originally Posted by 2.2Lude

Bumping up the tire pressure up front did help so I feel like more front spring or bar would also help but I don't want to be chasing my tail. I want to add more negative camber upfront(-2.5) to help tire wear but It will just give me more traction up front relative to rear making my current oversteer issue worse.

I was originally wanted to go with the R10/R8 combo but the Z1 guys said while those compounds worked well for the Z, they weren't enough for the heavier G. Might need to step back down.

The "best" tires that I'll put on this car will a 200tw "cheater tire". Something like a RS4 or N'ferra. No R compounds are in the plans for this car.

You also might soften your front bar as well. That will induce more understeer.Those tires are not cheater tires. The rs4 is good tire for endurance and getting more session in. The cheater tires are AO52, Falken 660 and Eagle r3. Really doesn't matter as you need to get the balance back in the car.

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2.2Lude · 01-05-2022, 07:25 PM

Quote:

Originally Posted by Hotrodz

You also might soften your front bar as well. That will induce more understeer.Those tires are not cheater tires. The rs4 is good tire for endurance and getting more session in. The cheater tires are AO52, Falken 660 and Eagle r3. Really doesn't matter as you need to get the balance back in the car.

Sent from my SM-G965U using Tapatalk

I'll give softening the front bar a shot, that will be the easiest thing to test on the car and a good starting point.

I guess I just have my terminology mixed up but yeah I was referring the segment which includes the RS4 and RE71's not the A052 and Eagle R3 class. They keep changing these category names lol.

I'm hoping reducing the front grip will help solve the issue but I'm not soo sure. Furthermore, if I increase the camber like I need to upfront I fear it is just going to make the balance worse.

I need to check still but do you not believe that I'm running out of rear suspension travel?

Rusty · 01-05-2022, 08:17 PM

IF you want to improve.

SPL arms.

Alignment spec's.
Front; camber -2, Caster +6, toe .06D in
Rear; camber -1.7, toe .06D in.
This will give you a set up that will live on both street and track.

Hotchkis sway bar. You need to stiffen the front up. Stiffer bar induces more understeer.

Your dampening isn't helping by being soft. Too much weight transfer. Stiffen the compression in the front and stiffen the rebound in the rear.

DO NOT use the VDC. Turn that motherfvcker OFF! What happens with it on. When it senses the rear stepping out. It WILL apply one rear brake caliper to straighten the car out. It WILL have you pointed in the wrong direction.

The Mich PSS tires will hang for about 20 to 30 minutes before they lose grip and begin greasy.

Get a notebook and start taking notes. Weather conditions, tire pressure, fuel level, anything that will affect the handling. After awhile, you will see a pattern.

2.2Lude · 02-14-2022, 06:09 PM

Quote:

Originally Posted by Rusty

Alignment spec's.
Front; camber -2, Caster +6, toe .06D in
Rear; camber -1.7, toe .06D in.
This will give you a set up that will live on both street and track.

Hey Rusty, are you toe recommendation each side or total toe?

I tried .04D in each side and the car now pushes like never before.

Rusty · 02-14-2022, 07:08 PM

Quote:

Originally Posted by 2.2Lude

Hey Rusty, are you toe recommendation each side or total toe?

I tried .04D in each side and the car now pushes like never before.

Total toe.

SonicVQ · 01-06-2022, 04:10 PM

Quote:

Originally Posted by 2.2Lude

I'm hoping reducing the front grip will help solve the issue but I'm not soo sure. Furthermore, if I increase the camber like I need to upfront I fear it is just going to make the balance worse.

This is a good book that I read in the mid 80s... AND everything in it is true today:
https://www.amazon.com/How-Make-Your.../dp/0912656468

It might be a good idea to get a correct foundation of understanding so you can develop what works for your driving style, in your car, with your setup. Then you can make your own informed decisions, test them, and re-evaluate.

In 20+ years of car forum participation, any handling question just becomes a sea of contradicting answers.

01-05-2022, 05:10 PM	#1 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684386	You need more spring up front rear okay, get some trackable coilovers. If you are running r compound tires you need to shoot for tire pressures between 34 and 36 hot. Your ride height should be within an 3/4 of OEM. Get all SPL suspension components as mentioned. Camber in the rear is okay and you need at minimum -2.5 up front. As was mentioned, the brake pads you are using are very aggressive and should only be used with r compound tires or slicks. Xp 10 and 8 are just fine. I ran them on my boosted Z with r compound tires even when I got to HPDE 4 and was carrying some speed. If all else fails or you don't have the money to get your suspension setup properly, go back stock or close as possible. Then change one significant component at a time. Sent from my SM-G965U using Tapatalk Rusty likes this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

01-05-2022, 08:17 PM	#5 (permalink)
Rusty A True Z Fanatic Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 70 Posts: 35,578 Drives: 2011 Nismo GM 6M Rep Power: 2684440	IF you want to improve. SPL arms. Alignment spec's. Front; camber -2, Caster +6, toe .06D in Rear; camber -1.7, toe .06D in. This will give you a set up that will live on both street and track. Hotchkis sway bar. You need to stiffen the front up. Stiffer bar induces more understeer. Your dampening isn't helping by being soft. Too much weight transfer. Stiffen the compression in the front and stiffen the rebound in the rear. DO NOT use the VDC. Turn that motherfvcker OFF! What happens with it on. When it senses the rear stepping out. It WILL apply one rear brake caliper to straighten the car out. It WILL have you pointed in the wrong direction. The Mich PSS tires will hang for about 20 to 30 minutes before they lose grip and begin greasy. Get a notebook and start taking notes. Weather conditions, tire pressure, fuel level, anything that will affect the handling. After awhile, you will see a pattern. BGTV8 and Hotrodz like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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