So I finally got around to getting my car corner weighted, and performance aligned, and what a difference it made. Prior to getting corner weighted I knew it was necassary because under hard braking I would notice a brake bias which I was attributing to the difference in weight distribution(and hoping it was not a siezed caliper), this problem is now gone. My question to experienced suspension gurus with ITRs is what was the ideal calculated weight per corner, or rather what is the formula used to derive the ideal calculated weight. I am curious because the numbers listed below make no sense to me. Attatched is the corner weighting before and after results as well as a quick snap shot of the R after being set at the proper ride height. Suspension mods consist of Omnipower full street coils (too soft) rear camber, front camber adjustment, full race traction bars (to set caster), and jdm rear ITR strut bar.

 

All of these people are viewing the post, but no comments, wtf?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmvtec28 &raquo;</TD></TR><TR><TD CLASS="quote">All of these people are viewing the post, but no comments, wtf? </TD></TR></TABLE>

Looks fine, number wise.
The wheel lip height numbers look similar to those I saw after my first ITR was cornerweighted.

With the present car we just went by the cross weights and I never really got any documentation of the numbers. That being said I plan to tweak it a little bit in the next couple weeks and will probably take some measurements tomorrow just to see how mine compares with your numbers, and whatever I might have written down in my manual or somewhere from years ago.

 

See the cross weights is where I am confused why is their such a variance from the right side to the left side, I thought they were supposed to be equal? Okay, I'm off to do a search on corner weighting to figure this out...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmvtec28 &raquo;</TD></TR><TR><TD CLASS="quote">See the cross weights is where I am confused why is their such a variance from the right side to the left side, I thought they were supposed to be equal? Okay, I'm off to do a search on corner weighting to figure this out...</TD></TR></TABLE>

They wont be equal because on the left side your own weight is taken into consideration. No point setting corner weights without including the drivers weight

 

Huh? Cross weights = LF + RR vs RF + LR. Those two numbers should be equal or very close.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenracer &raquo;</TD></TR><TR><TD CLASS="quote">

They wont be equal because on the left side your own weight is taken into consideration. No point setting corner weights without including the drivers weight </TD></TR></TABLE>

 

When I got my car corner weighted the first time, I was also confused until Rodney explained to me that the cross weights (not individual weights on each wheel) is the limiting factor. You basically want the center of gravity of the car to be in the center of the car for perfect balance. Obviously, it won't always be perfect because your car's weight is never static, but you corner weight your car for best case scenario.

I would corner weight my car with a half to a 3/4 of a tank. Why? My minimum weight for racing is when my car has a half tank of gas. Therefore, my car will see most of it's time on the track with a full to 1/2 tank of gas. I corner weight with me in the car and about 3/4 tank. Therefore, we me in the car and the gas where I want it, I want to see 50/50 cross weights (or as close as possible). This may mean that I have much more weight on one tire and much less weight on another.

Makes sense?

 

That makes sense, when the car was corner weighted, they took into consideration my weight and it had slightly more than 3/4 of a tank. So I think I am good. Thanks for the comments.

 

if the weight is off how are they adjusting to correct it? adding weight?
&lt;---sorry Im a newB to this and have never done it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITRacer121 &raquo;</TD></TR><TR><TD CLASS="quote">if the weight is off how are they adjusting to correct it? adding weight?
&lt;---sorry Im a newB to this and have never done it?</TD></TR></TABLE>

Adjusting coilover height at each individual corner.

 

Ironically the heights to get it corner weighted correctly were about the same side to side. Who'd a thunk that

 

Thats part of the reason I was so nervous, the front heights were identical as was the rear, I thought there would have been some variance from side to side.

 

i always measure my heights to the jackpoints on the sides of the car.. fenders, lips, and frame rails are too bendy..