Best - Simplest way to fix the Supra for tracking?

[s.hammi]

The_Dude - looks like you are doing something right, lol. Was this on the stock super sports?

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[s.hammi]

PaulFRDE - Floaty - It feels like the car has lift as opposed to down force as you get above certain speeds in corners or over bumps. I start noticing it above 80, at 115 and above it becomes really bad. What is funny, at speeds below 80, it has an unbelievable amount of grip.

 

[razorlab]

PaulFRDE - Floaty - It feels like the car has lift as opposed to down force as you get above certain speeds in corners or over bumps. I start noticing it above 80, at 115 and above it becomes really bad. What is funny, at speeds below 80, it has an unbelievable amount of grip.

Front sway helps with that, just don't go too big. Easy install too.

 

[Vegas17]

hmm... i ran stock sizes and targeted 30psi front and 26psi back. higher pressures felt like skates to me. i managed a 1:44.4 at club motorsports and 1:19.8 at thompson only after dropping to these pressures.

only modification to the car are camber plates. i'm running -3 deg on the front and -2 deg on the back.

i'm confused. what am i doing wrong?

This got me digging around, seems the tire rack test with the RE71RZs on an M2 was set to 32psi hot and a lot of the bimmerpost guys are 31 to 33 so I need to rethink my targets this weekend and see.

 

[razorlab]

This got me digging around, seems the tire rack test with the RE71RZs on an M2 was set to 32psi hot and a lot of the bimmerpost guys are 31 to 33 so I need to rethink my targets this weekend and see.

Most Super200's I have found are happy at 32psi hot. I usually go out on 25-26 cold, and have done PB's at below approx 30psi.

I have long since ditched TPMS on my Supra but here is an example on my boat anchor 4000lb M240i:

 

[marius b58]

I am late to the party on the Mk 5 Supra. I purchased a 2026 at the beginning of the summer. I have tracked it a few times so far. Thompson in CT. and Palmer and MA. I noticed a few others in the forums also track in the Northeast. At Thompson, the Supra feels pretty good in stock form. A bit soft/ floaty at speed but manageable. At Palmer, it felt much more floaty, (sorry, best way I can describe it). There were times that it also felt like the rear of the car was disconnected from the rest of the car, making rear grip unpredictable. I am looking for the shortest/ simplest path to, at a minimum, solve the rear feeling disconnected to the rest of the car. Remove some of the floaty feeling. (Suspension? or Down force?) I am also looking for a suggestion for camber plates for the front. I would prefer not to completely ruin the car for road use, but I think I am going to have to sacrifice a bit of street-ability to feel a little more comfortable on track. Thanks in advance for any input.

PaulFRDE - Floaty - It feels like the car has lift as opposed to down force as you get above certain speeds in corners or over bumps. I start noticing it above 80, at 115 and above it becomes really bad. What is funny, at speeds below 80, it has an unbelievable amount of grip.

For your issue, it is crucial to find the ideal tire pressure and have the suspension geometry set up for performance driving; however, this will only solve about 30 percent of the problem. The main issue stems from the rear subframe bushings and the hydraulic bushings on the front control arms. This is where you should start when you buy a Supra—even if you don’t track the car, it’s worth doing for street use as well. The car is transformed for the better in a dramatic way. There is only a very slight increase in NVH (noise, vibration, and harshness)—which, in fact, is what everyone tends to worry about.

 

[marius b58]

For your issue, it is crucial to find the ideal tire pressure and have the suspension geometry set up for performance driving; however, this will only solve about 30 percent of the problem. The main issue stems from the rear subframe bushings and the hydraulic bushings on the front control arms. This is where you should start when you buy a Supra—even if you don’t track the car, it’s worth doing for street use as well. The car is transformed for the better in a dramatic way. There is only a very slight increase in NVH (noise, vibration, and harshness)—which, in fact, is what everyone tends to worry about.

 

[marius b58]

For the rear subframe, you need a solid mounting setup using aluminum bushings; for the front control arms, I went with Meyle HD parts. Before the upgrade, the rear subframe would shift 15–20 mm in every direction, and the front control arm bushings had 10–12 mm of play.

 

[marius b58]

For the rear subframe, you need a solid mounting setup using aluminum bushings; for the front control arms, I went with Meyle HD parts. Before the upgrade, the rear subframe would shift 15–20 mm in every direction, and the front control arm bushings had 10–12 mm of play.

 

[marius b58]

Consider that the front subframe has a solid factory mounting point; the rear should be the same. This is also the case for the M2, M3, and M4 models, as well as the European-spec Supra Final Edition.

 

[razorlab]

did that really need to be five separate posts?

 

[the_dude]

The_Dude - looks like you are doing something right, lol. Was this on the stock super sports?

it was on re71rz just like @Vegas17. that's why i'm asking.

 

[the_dude]

This got me digging around, seems the tire rack test with the RE71RZs on an M2 was set to 32psi hot and a lot of the bimmerpost guys are 31 to 33 so I need to rethink my targets this weekend and see.

m2s are a bit heavier that the supras. that plays into the whole thing as well.

 

[the_dude]

I have long since ditched TPMS on my Supra

curious as to why...

very nice!

here's mine from club motorsports:

 

[razorlab]

curious as to why...

Less button/clicky things to remember to turn off before going on track.

Below 25psi the TPMS would turn TC back on while driving to the hot pits and then I would need to remember to turn TC back off before going on track.

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