Good Advice or Learning Curve?

Bshields22 · 02-24-2016, 03:56 PM

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!

Rusty · 02-24-2016, 07:27 PM

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

Bshields22 · 02-24-2016, 07:34 PM

Quote:

Originally Posted by Rusty

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

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.

cv129 · 02-24-2016, 08:09 PM

Interested to see which measurements changed

Rusty · 02-24-2016, 09:28 PM

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.

Bshields22 · 02-25-2016, 11:46 AM

Quote:

Originally Posted by cv129

Interested to see which measurements changed

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.

Bshields22 · 02-25-2016, 11:48 AM

Quote:

Originally Posted by 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.

Interesting. I will keep that in mind next time.

02-24-2016, 03:56 PM	#1 (permalink)
Bshields22 Enthusiast Member Join Date: Nov 2012 Location: Anaheim, CA Posts: 422 Drives: 2012 Black 370Z-R Rep Power: 697	Good Advice or Learning Curve? 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

02-24-2016, 07:27 PM	#2 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,865 Drives: 2011 Nismo GM 6M Rep Power: 2684436	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

02-24-2016, 08:09 PM	#4 (permalink)
cv129 A True Z Fanatic Join Date: Jul 2011 Location: Dallas, TX Posts: 3,192 Drives: 09 Nismo, 16 Nismo Rep Power: 159827	Interested to see which measurements changed __________________ Setrab \| RE-71 \| SPL \| JRZ \| Nismo \| ARK \| Whiteline \| RacingBrake \| CJM Oil Pan \| Ti shield

02-24-2016, 09:28 PM	#5 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,865 Drives: 2011 Nismo GM 6M Rep Power: 2684436	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

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