Ideal Hot Pressure Range RE-71R Track Use

[Powerslide]

What hot pressures seem to work best for the RE-71R on the track? I've read on other forums (Porsche, Mustang) of people complaining they start to get greasy around 37 hot and higher pressures.

Will likely be going back to the track in Sept. so want to get a good consensus before I go!

[NYG]

A lot of the F80/F82s I know that run RE71Rs are 33-34 front, 32 rear.

My Nittos work best in that range as well.

I haven't really used a tire (non-slick) that feels good at 35 or higher.

[Powerslide]

Originally Posted by NYG

A lot of the F80/F82s I know that run RE71Rs are 33-34 front, 32 rear.

My Nittos work best in that range as well.

I haven't really used a tire (non-slick) that feels good at 35 or higher.

Good to know. One exception is the MPSS (in case your using them on track - I wanted to wear these out before going to more track capable tires like the RE-71R I know have)- I kept that at 34 cold before each session and would get to 38-42 hot during (then would bleed down to 34 cold again right before following session) and I preserved the relatively soft sidewalks pretty good (since MPSS needs higher pressures to somewhat compensate for softer sidewalks).

[Powerslide]

Originally Posted by NYG

A lot of the F80/F82s I know that run RE71Rs are 33-34 front, 32 rear.

My Nittos work best in that range as well.

I haven't really used a tire (non-slick) that feels good at 35 or higher.

BTW - I know I didn't ask this in my original post - but for hot pressures of 32-34 psi - what would the cold pressures usually be right before each session?

[NYG]

Originally Posted by Powerslide

Good to know. One exception is the MPSS (in case your using them on track - I wanted to wear these out before going to more track capable tires like the RE-71R I know have)- I kept that at 34 cold before each session and would get to 38-42 hot during (then would bleed down to 34 cold again right before following session) and I preserved the relatively soft sidewalks pretty good (since MPSS needs higher pressures to somewhat compensate for softer sidewalks).

I've used my MPSS once at NJMP Lightning and may run them for Time Trials next month but with those tires too, I found them a lot better at 35 psi max. Approaching 40, I start getting severe chunking of the tire and just under that they begin to feel a little like ice skates.

Originally Posted by Powerslide

BTW - I know I didn't ask this in my original post - but for hot pressures of 32-34 psi - what would the cold pressures usually be right before each session?

I start with 28 all around on a hot day and end up letting pressure out after each session to get it zero'd in. When I leave the track, I'm anywhere between 24-26 cold.

[Powerslide]

Originally Posted by NYG

I've used my MPSS once at NJMP Lightning and may run them for Time Trials next month but with those tires too, I found them a lot better at 35 psi max. Approaching 40, I start getting severe chunking of the tire and just under that they begin to feel a little like ice skates.

I start with 28 all around on a hot day and end up letting pressure out after each session to get it zero'd in. When I leave the track, I'm anywhere between 24-26 cold.

Good to know - thanks again

[dvas]

I start around 27 cold in the morning and them bleed them throughout the day to keep them around 34 hot. They still get greasy after a few hot laps without traffic.

I would suggest run them as low as you can so long as you don't get rollover onto the sidewalls.

[Powerslide]

Originally Posted by dvas

I start around 27 cold in the morning and them bleed them throughout the day to keep them around 34 hot. They still get greasy after a few hot laps without traffic.

I would suggest run them as low as you can so long as you don't get rollover onto the sidewalls.

Great advice - wondering if anyone on here has noticed at what temps or psi they will stay to rollover at?

[biofluke]

I would think you would get rollover if you are 32psi or under while hot. above 38 hot you might get inner tread wear and rapidly increase temps.

I noticed on my MP4S (similar tire) I started getting really greasy on my last session of the last day after having no traffic for 3-4 laps. My hot psi was 34-35 and my air temps per TPMS were (I think) around 156degF when they got slippery on me.

It did cause (or allow) me to have a really fun controlled powerslide on the uphill section of the boot at Watkins Glen, but braking was severely impacted after that.

[Powerslide]

Originally Posted by biofluke

I would think you would get rollover if you are 32psi or under while hot. above 38 hot you might get inner tread wear and rapidly increase temps.

I noticed on my MP4S (similar tire) I started getting really greasy on my last session of the last day after having no traffic for 3-4 laps. My hot psi was 34-35 and my air temps per TPMS were (I think) around 156degF when they got slippery on me.

It did cause (or allow) me to have a really fun controlled powerslide on the uphill section of the boot at Watkins Glen, but braking was severely impacted after that.

I noticed today - when it was about 60 F my Re-71's were at 30 psi cold - after about 10 miles of moderate street driving and 20 miles of highway driving - my psi went up to 34-35 psi and about 87-90 F. I think this shows that you absolutely need to start each session 27-28 Psi cold to avoid going higher than 34-35 psi hot in track. Hopefully I'll get a chance to test this soon - weather and work permitting - fingers crossed)!