what more can i do for a lighter front end?

[Icanfaptothis86]

Originally Posted by PST

Our 2015 BRZ was 54.5% front with a full tank of gas and 175 lbs of driver. Also worth noting, the LF/RR cross was 50.1%. That's extremely hard to achieve, even with adjustable shocks. Those numbers were taken on Intercomp scales on a poured epoxy surface plate.

To the OP, what exactly are you trying to change about the car? You're saying you want to improve the balance of the car, but you didn't post your previous balance numbers.

Can you link to details/specs on the car ?

[GSpeed]

Originally Posted by Icanfaptothis86

Can you link to details/specs on the car ?

Our car? Sure.

http://www.ft86club.com/forums/showthread.php?t=90384

[mokinbird87]

Originally Posted by PST

Our 2015 BRZ was 54.5% front with a full tank of gas and 175 lbs of driver. Also worth noting, the LF/RR cross was 50.1%. That's extremely hard to achieve, even with adjustable shocks. Those numbers were taken on Intercomp scales on a poured epoxy surface plate.

To the OP, what exactly are you trying to change about the car? You're saying you want to improve the balance of the car, but you didn't post your previous balance numbers.

oh no specific numbers yet. solely all butt dyno I would like for the front end to have less inertia and turn in a bit sharper. There are lots of ways to achieve this, but I want to do it with removing the weight off the nose first, and then move onto other procedures ( stiffer springs in the rear, etc). extra camber and caster helps tremendously from the Raceseng plates, but imagine how much sharper it would feel with less weight in the front! It`s not really apples to apples but the S2000 would be a good benchmark here.

[MaximeT]

Originally Posted by mokinbird87

oh no specific numbers yet. solely all butt dyno I would like for the front end to have less inertia and turn in a bit sharper. There are lots of ways to achieve this, but I want to do it with removing the weight off the nose first, and then move onto other procedures ( stiffer springs in the rear, etc). extra camber and caster helps tremendously from the Raceseng plates, but imagine how much sharper it would feel with less weight in the front! It`s not really apples to apples but the S2000 would be a good benchmark here.

If you got lightweight wheels, battery, brakes, empty windshield fluid, the only thing missing is the front crash beam. (Which I would like to keep). You're done with weight saving.

You won't get s2000 weight distribution unless you move engine further back.

You have to change functional parts now if you want a different feeling/performance/balance.

You can do tires (more), rear sway bare (more), shocks settings. (Less front compression).

[GSpeed]

Originally Posted by mokinbird87

oh no specific numbers yet. solely all butt dyno I would like for the front end to have less inertia and turn in a bit sharper. There are lots of ways to achieve this, but I want to do it with removing the weight off the nose first, and then move onto other procedures ( stiffer springs in the rear, etc). extra camber and caster helps tremendously from the Raceseng plates, but imagine how much sharper it would feel with less weight in the front! It`s not really apples to apples but the S2000 would be a good benchmark here.

What's your front toe look like?

It's going to be EXTREMELY difficult to appreciably reduce your polar moment of inertia a significant amount while keeping "street car" status.

Not trying to tell you you're wrong, but I'm afraid you're barking up the wrong tree. There are a lot of other things to change before you have to resort to weight loss. Just lowering our car 1" sped up weight transfer 20% through chicanes.

[DarkSunrise]

Originally Posted by MaximeT

If you got lightweight wheels, battery, brakes, empty windshield fluid, the only thing missing is the front crash beam. (Which I would like to keep). You're done with weight saving.

I remember there used to be some company that made lightweight front LCA's. Robispec I think?

[MaximeT]

I think so, never saw the price and availability. I would change coilovers before that.

[solidONE]

Good excuse to get a roll bar. Good safety equipment if you track a lot while shifting the weight balance rearward. And attach a fire extinguisher somewhere behind the center line to shift even more weight rearward.

[mav1178]

Originally Posted by mokinbird87

I would like for the front end to have less inertia and turn in a bit sharper.

So I'm assuming an alignment didn't shave enough weight off for you?

-alex

[mokinbird87]

Originally Posted by PST

What's your front toe look like?

It's going to be EXTREMELY difficult to appreciably reduce your polar moment of inertia a significant amount while keeping "street car" status.

Not trying to tell you you're wrong, but I'm afraid you're barking up the wrong tree. There are a lot of other things to change before you have to resort to weight loss. Just lowering our car 1" sped up weight transfer 20% through chicanes.

oh yea definitely appreciate the feedback.. that`s why I made this thread you know. things like the faster weight transfer of 20% by lowering 1" is something I would`ve never known. I checked out your build thread and lots of good info there! My alignment specs are: front: -1.5 camber 6 degrees of caster, 0 toe. rear: -1.3, -1.5 (OEM spec) camber, 3/32nd toe in for stability under braking. I guess that contradicts the want of a "sharp" front end but tire preservation is quite important to me I could crank up the rear camber but I dont have adjustment at the rear yet.

[strat61caster]

I understand doing your best to balance the weight of the car, makes sense to me but as others have said it will be very hard to get any seriously noticeable differences.

My question is, what are you doing with the car that makes the balance troublesome?

If it's autoX then the toe will give you more turn in than you could ever want.

If it's track then why not go for aero modifications?
Look up Element Tuning for their balls out time trial car, lots of aero on that to balance the car and add grip.

[Icanfaptothis86]

Originally Posted by DarkSunrise

I remember there used to be some company that made lightweight front LCA's. Robispec I think?

Pardon my ignorance LCA ?

[mokinbird87]

Originally Posted by solidONE

Good excuse to get a roll bar. Good safety equipment if you track a lot while shifting the weight balance rearward. And attach a fire extinguisher somewhere behind the center line to shift even more weight rearward.

not a bad idea at all.

[MaximeT]

Originally Posted by Icanfaptothis86

Pardon my ignorance LCA ?

Lower Control Arm