Track wheels

[C7 B8]

Anyone planning to run 18s on the track? If so, please share brand and size of wheels and tires you know would fit. Thanks!

Sponsored

 

[Myshelby3425]

Didn't think 18s fit due to the size of the brakes. There is barely space as it is with 19s


Sent from my iPhone using Tapatalk

 

[bpracer]

Didn't think 18s fit due to the size of the brakes. There is barely space as it is with 19s


Sent from my iPhone using Tapatalk

I could barely stick my finger between the caliper bridge and the non-R wheel barrel. There would be very little clearance with 18"s. I've had crap get stuck between a wheel and a caliper at the track. It could have got real ugly.

 

[Bossing]

I could barely stick my finger between the caliper bridge and the non-R wheel barrel. There would be very little clearance with 18"s. I've had crap get stuck between a wheel and a caliper at the track. It could have got real ugly.

Yup it's similar to the F80/82 M's with CCBs.... the design clearance is less than 5mm. Debris gets lodged and effs up the wheel barrel and/or caliper finish.

http://f80.bimmerpost.com/forums/showthread.php?t=1107233

 

[C7 B8]

Cortex just got back to me. They said forgeline built some 18s for them that will work. Will be finding out more details next week.

 

[Voodooo]

Has anyone seen the post that they listed on the GT350R vs Z28? It shows the Z28 vs the 1Le and they swapped wheels and tires. This was the samething I was wondering. How much difference would the GT350 vs GT350R be on the same track with both cars using the R wheel and tire combo. And how much difference is their between both cars on the same track using the wheels that came on each car. This would be interesting to me. For one much of the suspension is the same on the R and non R. Much of it is in the shock tuning, front spring rates, wheel and tires and weight. I'd like to see a R vs track pack both running the R wheel and tire combo

 

[C7 B8]

Has anyone seen the post that they listed on the GT350R vs Z28? It shows the Z28 vs the 1Le and they swapped wheels and tires. This was the samething I was wondering. How much difference would the GT350 vs GT350R be on the same track with both cars using the R wheel and tire combo. And how much difference is their between both cars on the same track using the wheels that came on each car. This would be interesting to me. For one much of the suspension is the same on the R and non R. Much of it is in the shock tuning, front spring rates, wheel and tires and weight. I'd like to see a R vs track pack both running the R wheel and tire combo

At LS track tour, I asked a FP engineer about mods to close the performance gap between R and non-R. He said without any hesitation, tires. Then lighter wheels. He also said run the car in Ford specs and Ford will issue track specs soon.

Has anyone measured ride height between R and TP? I think shorter tires alone makes R about an inch lower. I agree much of TP and R are the same --- I think its just shorter tires, f springs and MR software. Maybe firmer bushings but I think I may skip those for a dual purpose car.

Also read on another thread CCWs fit over Z06's 15.5 in brakes. Surely they can fit over 15s on the GT350.

 

[Myshelby3425]

At LS track tour, I asked a FP engineer about mods to close the performance gap between R and non-R. He said without any hesitation, tires. Then lighter wheels. He also said run the car in Ford specs and Ford will issue track specs soon.



Has anyone measured ride height between R and TP? I think shorter tires alone makes R about an inch lower. I agree much of TP and R are the same --- I think its just shorter tires, f springs and MR software. Maybe firmer bushings but I think I may skip those for a dual purpose car.



Also read on another thread CCWs fit over Z06's 15.5 in brakes. Surely they can fit over 15s on the GT350.

Gt350 has the 15.5 up front also so they CCW may fit.


Sent from my iPhone using Tapatalk

 

[Voodooo]

At LS track tour, I asked a FP engineer about mods to close the performance gap between R and non-R. He said without any hesitation, tires. Then lighter wheels. He also said run the car in Ford specs and Ford will issue track specs soon.

Has anyone measured ride height between R and TP? I think shorter tires alone makes R about an inch lower. I agree much of TP and R are the same --- I think its just shorter tires, f springs and MR software. Maybe firmer bushings but I think I may skip those for a dual purpose car.

Also read on another thread CCWs fit over Z06's 15.5 in brakes. Surely they can fit over 15s on the GT350.

I'm curious that when ford releases the track key if it will also change the parameters of the MR shocks or just engine. Also curious as to why they didn't change the rear spring rates between the two cars. I read that the R has a firmer bushing, but that's the same source that said the R had carbon ceramic brakes so go figure.

 

[C7 B8]

I'm curious that when ford releases the track key if it will also change the parameters of the MR shocks or just engine. Also curious as to why they didn't change the rear spring rates between the two cars. I read that the R has a firmer bushing, but that's the same source that said the R had carbon ceramic brakes so go figure.

Suspension tuning included in Track key makes sense. Which means they won't do it. :lol:

 

[Voodooo]

I've tried calling HRE about their P101 wheel and finding the weight in the R sizes but they never returned my call yet.

 

[bpracer]

Also curious as to why they didn't change the rear spring rates between the two cars.

I already got in a debate about this, but there appears to be three different sets of both front and rear springs for the GT350. The sales material doesn't sync with the owners supplement data or these different part numbers.

http://www.mustang6g.com/forums/showpost.php?p=856999&postcount=63

 

[TraKWeapon]

At LS track tour, I asked a FP engineer about mods to close the performance gap between R and non-R. He said without any hesitation, tires. Then lighter wheels. He also said run the car in Ford specs and Ford will issue track specs soon.

Has anyone measured ride height between R and TP? I think shorter tires alone makes R about an inch lower. I agree much of TP and R are the same --- I think its just shorter tires, f springs and MR software. Maybe firmer bushings but I think I may skip those for a dual purpose car.

Also read on another thread CCWs fit over Z06's 15.5 in brakes. Surely they can fit over 15s on the GT350.

I talked to an engineer that tuned the suspension at the Historic races in August. He told me basically the same thing and that lighter wheels with the PSC2 tires would be 90% fo the difference and that's where I'm headed. He did say the slightly lower gearing of the shorter 30 series tires is part of the performance difference that includes acceleration and turn in feel. The shorter tires lower the car 1/2" and the front R springs lower the front another 1/2" compared to the non R. The bushings are the same but the RSB end links are 8mm shorter which stiffens the rear in conjunction with the stiffer front springs.

One member on BMO tried his 18" CCW's from his Boss on his GT350R and they did not fit. I think the calipers have a larger profile than the Z07 so 18's are going to be hard to fit but not impossible. How much do you want to spend? The N4S R spec wheels will be a nice option along with the PSC2 tires.

 

[OMGPonies]

Has anyone seen the post that they listed on the GT350R vs Z28? It shows the Z28 vs the 1Le and they swapped wheels and tires. This was the samething I was wondering. How much difference would the GT350 vs GT350R be on the same track with both cars using the R wheel and tire combo. And how much difference is their between both cars on the same track using the wheels that came on each car. This would be interesting to me. For one much of the suspension is the same on the R and non R. Much of it is in the shock tuning, front spring rates, wheel and tires and weight. I'd like to see a R vs track pack both running the R wheel and tire combo

This is a great idea. I'll try to find someone in California getting the R to try this out with. Already planning to get Thunderhill for a private track day in the coming months.

 

[mattlqx]

This is a great idea. I'll try to find someone in California getting the R to try this out with. Already planning to get Thunderhill for a private track day in the coming months.

I'd be interested in going up to T-hill if I have my car at that time.

Sponsored