Race Tracking Your Supra - Information exchange

[Gabe]

Verus has CFD data showing benefit in downforce. There is real drainage of hot air through them.

Was part of the pilot release of the product way before they were commercially available. When I asked the why not put fins etc, they told me that the benefit was negated by doing so.

I have had them for about a year. Verus benefit is that They are not a simple hole in the fender that allows dirt in. they are 2 piece vents that completely isolate the flow from the engine bay.

I did add a grill because there is debris that goes up specially during rain but that was my own mod.

Sponsored

 

[i3igpete]

Verus ones look cool as shit, and are the most functional because they extract air from DEEP within the wheel well and size does matter for vents.

Just be careful of your ruleset. Theyll bump you up to track mod in gridlife since open unlouvered vents not allowed in street gt or street mod. But if grid life is not your primary org, I guess you could just tape over it for the event.

 

[Gabe]

Verus ones look cool as shit, just be careful of your ruleset. Theyll bump you up to track mod in gridlife since open unlouvered vents not allowed in street or street mod.

I had no idea about this. This will probably never affect me as I don’t think I will ever get there (I just exchange cash for the benefit to circle aimlessly around the track LOL ) but definitely something to keep in mind for the folks that are competing

 

[TBK]

Not a Supra, but sharing this footage from today's time attack race. This is our shortest layout by far. The longest layout on this same track is almost 3 times as long

Monster Evo. Monster lap.

 

[Gabe]

Getting ready for my next track weekend at homestead

unfortunately the coilovers and camber plates did not make it on time, to get them installed, settled, height adjusted a aligned.
So I will go out again on my street tires and springs.

I’m a slow driver and will go out with 54-56% of my pads left, (measured taking into account ONLY the compound-obviously) I know the wear is exponential as they get thinner. I have a new set, just in case.

but I think I’m ok for this weekend.

 

[Subydude]

That's plenty of pad. The exponential wear seems to happen somewhere around .25" or so. When you're out at roughly .5" that's definitely "good to go" range. Would be interesting to see how much gets used up during the weekend.

I need to check the pads again after VIR the other week. The car had some odd braking behavior into 1. Plus it's finally time to put the stock pads back in for a few months while it's "winter" in the SE.

 

[Mdstx]

Has anyone tried these camber plates? Not knowing a lot about suspension, their sales talk about compensating for caster changes sounds reasonable.

https://www.uspmotorsports.com/prod...es-for-mk5-toyota-supra-75791723?sku=75791724

Did you get them? I recently ordered them and some their other bits.

 

[i3igpete]

I use something like this. At lunchtime can run a quick check by poking your hand between the spokes and reach the outer pad. Just assume the inside is 2 steps thinner out of caution.

 

[Gabe]

That's plenty of pad. The exponential wear seems to happen somewhere around .25" or so. When you're out at roughly .5" that's definitely "good to go" range. Would be interesting to see how much gets used up during the weekend.

I need to check the pads again after VIR the other week. The car had some odd braking behavior into 1. Plus it's finally time to put the stock pads back in for a few months while it's "winter" in the SE.

when you put the stock pads do you change the rotors as well or use the same rotors and if they are the same rotors do you need to clean the OEM compound from the rotors and bed the track pads again?

 

[kungfujedis]

Did you get them? I recently ordered them and some their other bits.

No, some refurb verus plates come up for ~$100 bucks off so I just got those instead.

 

[Subydude]

when you put the stock pads do you change the rotors as well or use the same rotors and if they are the same rotors do you need to clean the OEM compound from the rotors and bed the track pads again?

I'm an awful person in that I don't change rotors between stock and race pads. That would be optimal so there's no cross contamination, but over the years I've found swapping back and forth is a non-issue for most pads. I do run a quick bed procedure after a pad swap of 6-8 hard braking applications for peace of mind and to make sure things are working, but that's it.

I've swapped pads (different manufacturer/compound entirely) mid endurance race with no issues which was what led to me doing this. Optimal is to keep separate brake rotors, or at least scotch bright with some brake clean.

 

[TBK]

Folks who run 200tw tires. What warm pressures do you target?

Also, what do you (not the manufacturer) consider operating temps for that tire?

 

[razorlab]

Around 32psi here for all the 200's I have run so far. I usually start the day with 25/24 psi cold and bleed after each session.

 

[TBK]

Around 32psi here for all the 200's I have run so far. I usually start the day with 25/24 psi cold and bleed after each session.

Struggled to get the tires properly warm last time around, so I'm also going to lower my cold pressures. I usually target 34 warm, but also considering going down a tad. So looks like you're pretty much in the same ballpark in going to be testing tomorrow.

 

[zackarybyrd]

Folks who run 200tw tires. What warm pressures do you target?

Also, what do you (not the manufacturer) consider operating temps for that tire?

I just keep a tire chalk and a probe pyrometer with me and decide based on that and the way it feels out on track-I figure out what I want for myself. It’s probably overkill a lot of the time but it’s what I am doing. I do the same thing with my alignment. Lots of really smart people on here do it in ways that work for them but I found I have my own preferences. For example, I like -3.3 degrees of camber and started out at -4 from the forum.

I usually set my cold temps to try and hit the manufacturer’s recommended warm temps at first with a new to me tire and adjust from there. If I feel the tire folding during cornering after the out lap I need more air/undershot it, and if grip drops off before I expect it to I need to let some out. I will make quick pit stops to make those adjustments and dial them in. Once I get it dialed I write it all down and adjust my cold temps to hit my own targets.

I started paying more attention to manufacturers recommendations last year when I tried out the Hoosier TAPs. It seemed like a lot of us were having wear issues with that tire, and even delamination-both of which I experienced. I attributed it to the fact that I DID NOT follow the recommended curing process.

I gave them another shot and followed the instructions and they worked great for like five weekends and then they were bald.

Sponsored