trophy

Just put a set of RE71's on the car and now looking for some advice on pressures and alignment recommendations as a base line.

Car Details:
Running 235 front and 285 rear
Full monoball suspension with KW Clubports with heavier springs
Adjustable TRG swaybars.
Car weighs 2950 1/2 tank of gas and me in it
~335 HP to the wheels

The alignment I run for Hoosiers (245/285)
Camber: Front -3.5 Rear -3.2
Toe: Front 1 mm total toe out, Rear 3 mm total toe in.
Castor: 5.3 Equal both sides.

This alignment gives excellent balance, sharp turn in, little power oversteer on corner exit (slow speed corners), Excellent mid corner grip on sweepers. I feel the setup and alignment for the Hoosiers is on the money, can drive consistent fast laps all day long.

trophy

Wow, 158 Views and no advice or comments.

Anyone have some ideas...

1990nein

--

trophy

Thank you Mr Fast!! After some searches and reading it is clear these tires like sub 35 psi Hot. 33 to 34 should be th emagic number.

I know I have found that with my setup a 1 psi difference between front and rear has always worked best.

Now to find out if these tires like camber like Hoosiers or are more camber limited like the R888's

1990nein

--

Jeff951NJ

What tires did you have on the before the RE71's?

We run this tire on our Spec Miata, E36 & C6 Corvette for the Endurance Series we run and target 38PSI Hot pressure. I would keep your current alignment but read the tires the first day and make adjustments if needed.

To answer your question about camber. Yes the tires like camber, we set the car up very similar to what you would run a Hoosiers (R7 or A7's) at.

We found that running the tires at 32-35PSI the sidewall still rolled over even at 3.5 degrees of camber and wore out the outside edge prematurely.

trophy

Thanks Jeff,

Hoosier R6/7 and Dunlop Star Spec and R888

I always find it interesting the tire requirements for camber, and surprisingly its not always dependent on the stiffness of the sidewall, though it looks like it is part of the equation for the RE71.

I have a pyrometer and can read the tires easily at immediate track out so that plus a good look at the treads will get me where I need, just like a starting point...

Appreciate the response.

craina

I have found 35-36 hot to be a sweet spot, outside edges are just soft on these so expect to rotate and flip for best life.

trophy

Thanks Craina!

gbuff

I've been running these tires (and their predecessors) for years and the sidewalls are actually quite stiff--I watch my tire guy mount/dismount/flip them and it's not easy. But the RE71R has a very soft shoulder (where the great grip comes from)--I currently run them on a fwd car with very little camber and the shoulders wear FAST.

Can't really suggest a tire pressure for you but I'd put enough in to maintain that outer shoulder, whatever your camber setting.

Gary

trophy

Thanks Gary, all the data points I can get are valuable.

PPo

Trophy, I would appreciate your feedback on the camber that these tires prefer once your get a chance to try them out...

Also, if I am reading this thread correctly, the average seems to be that somewhere between 33-38 is what people like. For longevity keep it closer to 38, for maximum grip keep it closer to 33. Would anybody agree with that temporary conclusion?

Thanks,
P

trophy

Will Do. I have my first track day in a couple of weeks will be checking temps etc, may even take some alignment gear and play with alignment settings.

gbuff

At Mosport with my Mini with stock suspension setting i.e. very little front camber I set them at 34F/32R COLD, which tranlates to about 42-44F/36-38R HOT. Actually works very well though it doesn't sound so, but I need that much in front to at least somewhat save the outer shoulder, especially the left front.

Gary

Bill Verburg

I found that the pressures and alignment specs fro my Nitto 01s translated well to the 71s
pressure 34/35 hot
Front height (mm) 94
Rear height (mm) 98


Toe(front) 0° /side 0° total
camber(front) -3° 18'
caster, front 5°

Toe(rear) 9' /side 18' total
camber(rear) -2° 36'
caster, rear +3° 30' (3.5 on the Motorsport gauge)