Race Tracking Your Supra - Information exchange

[razorlab]

275/35 square vs 295/30 r18? Any1 used both/simmilar sizes?

I have my old 2.0 track wheels with tires [Dunlop direzza 03g 265 (278mm thread)] and wondering if i should sell them coz I may have a buyer. Gonna run Direzza/a052 only.
Goal in the next year is ~470 crank hp (400whp), maybe up to 500whp in the future. Looked at Supra GT4 which runs 305 square slicks so I figured 295 square would be fine choise but... 2nd guessing it now as I have wheels and some tires alrdy. Thinking for the future as this will be track setup for years to come.

Any opinions?

I've used both 275/40/18 CRS V2 and 295/35/18 CRS V2 although it's not really a fair comparison as the 295 CRS are wayyyy too wide for 18x10.5 wheels. I am solving that this year by going to 18x11.

Now, things that don't depend on the wheel width. I could feel the weight and drag difference for sure. My mph was down slightly in the straights. However, even with the tire feeling like crap because of the wheel width, it had very noticeable grip difference and I went faster. Looking forward to them on a proper 18x11.

Here are the measured width differences, both unmounted.


275/40/18

295/35/18

Sponsored

 

[Islindur]

Well, so seems like 295 will just be faster. 275 square were fine on 2.0, but I fear will be too low for ~400whp 3.0. Speed is all that counts for track wheels

 

[razorlab]

Well, so seems like 295 will just be faster. 275 square were fine on 2.0, but I fear will be too low for ~400whp 3.0. Speed is all that counts for track wheels

Jackie had 600+ and was bound to 275 CRS because of his class and went plenty fast. That said, he was sideways most of the time.

 

[AndyK5]

Ill have some feedback after Saturday on something similar. Normally use 315s but for this event I will be on 275s. Next event I will be on 295s. I honestly think 315s are overkill. Virtually impossible to get them up to temp. The good news was I could do 20 min sessions and the tires never got greasy.

315 impossible to get to temp.... you have not met me. I would 100% get at least the fronts up to temp with uberfast corner entry and understeer shenanigans . If turn traction 2 clicks off, rears will follow. Lap times will not represent how well the tires were warmed up though.


Lets hook up for pitting near each other, I am staying at a friends at Bakersfield on Friday. Running 275 ECF on 18x11 on stock power. They are pretty stretched on those rims but feel very responsive.

 

[FLtrackdays]

Well, so seems like 295 will just be faster. 275 square were fine on 2.0, but I fear will be too low for ~400whp 3.0. Speed is all that counts for track wheels

Jackie had 600+ and was bound to 275 CRS because of his class and went plenty fast. That said, he was sideways most of the time.

I really like my 275 Maxxis Victra R-1s or CRS with my stock’ish power. Looking forward to Bryan/Briana‘s personal preference at his/her track with they/them power.

Still figuring out my Garmin, now that I’ve got past the box opening video ?, and used it a few times. Assuming it remember/save the optimal sectors, so I can keep chipping away at em over time?

 

[Rensuhlo]

I really like my 275 Maxxis Victra R-1s or CRS with my stock’ish power. Looking forward to Bryan/Briana‘s personal preference at his/her track with they/them power.

Still figuring out my Garmin, now that I’ve got past the box opening video ?, and used it a few times. Assuming it remember/save the optimal sectors, so I can keep chipping away at em over time?

Surprised you didn't let your race shop set up the garmin.

 

[Spettro11]

I tried searching this thread but with 155 pages its a lot to go through. I'm a total rookie on a track, other than a couple of autocross events in a Miata.

I'm ready to book my complimentary HPDE-Intro track day, but could use some sound advice from anyone who is experienced. In my head I'm one and done, but I know me... will likely want to do more.

I'd be going to Mid-Ohio racetrack. Available dates are in April, May, and August. Is there a temperature preference for this? Any advice on prepping the car... or myself? Thanks!

 

[razorlab]

I tried searching this thread but with 155 pages its a lot to go through. I'm a total rookie on a track, other than a couple of autocross events in a Miata.

I'm ready to book my complimentary HPDE-Intro track day, but could use some sound advice from anyone who is experienced. In my head I'm one and done, but I know me... will likely want to do more.

I'd be going to Mid-Ohio racetrack. Available dates are in April, May, and August. Is there a temperature preference for this? Any advice on prepping the car... or myself? Thanks!

If it's your first track event ever:

1. Make sure you have an instructor.
2. Bring lots of water.
3. Make sure you eat.
4. Make sure all your car fluids are pretty fresh, with a 2023, you are probably just fine.
5. Pace yourself.
6. Have fun.

Ignore anyone that states matter of factly that you need track pads and track brake fluid for your first track event ever. This isn't a car made in 1994.

 

[initialDnut]

In an Ideal world - walker pro Motorsport half cage + whatever seat you find comfy for serious track use.

Thank you! I will look into those!

 

[initialDnut]

Since you’re new, really good link of a track build:

https://www.supramkv.com/threads/razorlab-2020-le-build-thread.12426

If keeping yours track focused. Lots of good info there

Thank you - I will check that out!

 

[nibble]

I tried searching this thread but with 155 pages its a lot to go through. I'm a total rookie on a track, other than a couple of autocross events in a Miata.

I'm ready to book my complimentary HPDE-Intro track day, but could use some sound advice from anyone who is experienced. In my head I'm one and done, but I know me... will likely want to do more.

I'd be going to Mid-Ohio racetrack. Available dates are in April, May, and August. Is there a temperature preference for this? Any advice on prepping the car... or myself? Thanks!

as for car, do proper maintenance such as checking oil, brake fluid, tire & ETC. bring a SA 2015 or above helmet, if you don't, NASA can rent you one for free. ask them before coming to event. Also bring water.

Get a good night sleep the night before and focus on driving. Seen some student focus more on prepping car rather than driving..

 

[Traxion]

I'd be going to Mid-Ohio racetrack. Available dates are in April, May, and August. Is there a temperature preference for this? Any advice on prepping the car... or myself? Thanks!

The other guys already answered the other stuff so about dates, for you it probably doesn't matter. Go with whatever fits your schedule best. For guys in the high levels, they would prefer cooler weather so they can push the cars more. April will probably be in the 60s and May in the 70s. I prefer not standing around in the cold or heat so I tend to avoid the heights of summer and mid winter events.

 

[Evolution]

315 impossible to get to temp.... you have not met me. I would 100% get at least the fronts up to temp with uberfast corner entry and understeer shenanigans . If turn traction 2 clicks off, rears will follow. Lap times will not represent how well the tires were warmed up though.


Lets hook up for pitting near each other, I am staying at a friends at Bakersfield on Friday. Running 275 ECF on 18x11 on stock power. They are pretty stretched on those rims but feel very responsive.

I have to bring my 315s for you to try out haha.

Lucky you have a place to stay close by the track! I will be leaving my house at 430am.... We are going to have a pretty big group out there so I will let them know to save one extra spot for you.

Looks like we are in different run groups for now (im in black). I might try to transfer to your group though. You have a lot more cars in your group which may not be a good thing. My plan is to put up the best time in my group the first session so that I get to start out front for the second session. That way I can get a few clean laps in before catching up to the end of the pack. This has worked out for me in the past so we will see what happens.

 

[Islindur]

I have to bring my 315s for you to try out haha.

Lucky you have a place to stay close by the track! I will be leaving my house at 430am.... We are going to have a pretty big group out there so I will let them know to save one extra spot for you.

Looks like we are in different run groups for now (im in black). I might try to transfer to your group though. You have a lot more cars in your group which may not be a good thing. My plan is to put up the best time in my group the first session so that I get to start out front for the second session. That way I can get a few clean laps in before catching up to the end of the pack. This has worked out for me in the past so we will see what happens.

Looking forward to feedback from 275's

 

[kaj]

Ill have some feedback after Saturday on something similar. Normally use 315s but for this event I will be on 275s. Next event I will be on 295s. I honestly think 315s are overkill. Virtually impossible to get them up to temp. The good news was I could do 20 min sessions and the tires never got greasy.

$20 says you are faster on 275s.

Sponsored