Good Advice or Learning Curve?

Bshields22

Hey guys,

One of the things I check before a track day is my alignment. It seems after every track event my alignment shifts a bit. Sometimes it stays within its degree window other times it tips just beyond the window then needing an adjustment.

Is this normal?

If it is, hopefully this sheds some light on peoples future track day prep and has them looking into their alignment where they wouldn't have otherwise.

Thanks!

__________________
308 rwhp | 252 rwtq | Fast Intentions CBE 18" Res | Stillen Gen 3 CAI | EcuTek Tune | Stoptech Slotted Rotors and Sport Pads | KW V3 Coilovers | SPL Upper Control Arms & Lower Rear Arms | Seibon CF TS Hood | Vossen CVT | SPC Toe bolts

Rusty

When you check your alignment. How much fuel you have in the tank? And what else you have in the Z?

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

Bshields22

hmmm, maybe 3/4 tank. Def more than 1/2. As for whats in the Z. If you mean mods they are in my signature. If you mean items its pretty much empty. 2nd car so no need for much "stuff" inside.

__________________
308 rwhp | 252 rwtq | Fast Intentions CBE 18" Res | Stillen Gen 3 CAI | EcuTek Tune | Stoptech Slotted Rotors and Sport Pads | KW V3 Coilovers | SPL Upper Control Arms & Lower Rear Arms | Seibon CF TS Hood | Vossen CVT | SPC Toe bolts

cv129

Interested to see which measurements changed

__________________
Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield

Rusty

Every time you have the Z alignment checked. How much fuel is in the tank, and any items that you keep and remove from the Z. When making comparisons. You want to keep everything the same.

Gasoline weights about 6.3 lbs per gal.

Full tank is 19 gal = 119.7 lbs.

3/4 tank is 14.25 gal = 89.775 lbs.

1/2 tank is 9.5 gal = 59.85 lbs.

1/4 tank is 4.75 gal. = 29.925 lbs.

So for each 1/4 tank. You have about 30 lbs of weight that is almost centered in the Z. It might not seem like much. But it does have an effect.

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

Bshields22

I'd have to pull my alignment sheets to give you the exact changes but this time the rear wheels were the only ones effected. Only the Toe needed adjustment by about .10 degrees. Camber and Caster was clean.

__________________
308 rwhp | 252 rwtq | Fast Intentions CBE 18" Res | Stillen Gen 3 CAI | EcuTek Tune | Stoptech Slotted Rotors and Sport Pads | KW V3 Coilovers | SPL Upper Control Arms & Lower Rear Arms | Seibon CF TS Hood | Vossen CVT | SPC Toe bolts

Bshields22

Interesting. I will keep that in mind next time.

__________________
308 rwhp | 252 rwtq | Fast Intentions CBE 18" Res | Stillen Gen 3 CAI | EcuTek Tune | Stoptech Slotted Rotors and Sport Pads | KW V3 Coilovers | SPL Upper Control Arms & Lower Rear Arms | Seibon CF TS Hood | Vossen CVT | SPC Toe bolts