Which I think its the Toyos greatest strength. They are nothing, if not utterly predictable. On my 2100# car they are terrific. IMO, they give very little up to Hoosiers, enough to matter if racing perhaps, but not for general track duty.

 

Are most RA1 guys running around 40# hot for best performance?

 

Has anyone run these? We used to run them on our SCCA GT cars (bias slicks)with great success. They do require that you keep the valves very very clean so that they operate properly. I haven't tried them on a DOT setup, but I'm thinking about it. The beauty is that you set the ideal pressure before going to pre-grid. As the tire builds heat it bleeds the pressure accordingly. You now have optimal tire pressure for every lap right from the start. Tires also last longer.

 

i found toya ra-1 best at mid to high 30's hot. i thought they got a bot greasy at 40 lbs or more more higher.

 

I would like to know also as I need to get rid of my Dunlop SSR's and finding the correct size in tires for my Boxster (8.5x18 and 10.5x18 rims) is difficult. The Corsa's would do the trick in a 255/35 and 285/30, but now that they are discontinued supply is limited.

Thanks,

Bro

 

The Pirelli Corsas have been discontinued? It's still on the Pirelli web site and Tire Rack is showing low stock or back order for inventory.

 

Fwiw, I've never found them "treacherous" and I've run them from 35 degree ambient up to 100 degree ambient...

 

Yep, Pirelli isn't making the Corsa anymore. The new tire system is the Corsa Asimmetrico and the Corsa Direzionale used together.

From the TireRack web page:

The P Zero Corsa System combines two of Pirelli's DOT-legal Competition tire designs that have been developed for the drivers of high-powered, super sports cars primarily for use at drivers' schools and lapping days conducted on race tracks. Also Original Equipment for the road versions of Ferrari 360 Challenge and Porsche GT3 cars, the P Zero Corsa System was designed to maximize a car's performance and satisfy even the most demanding driver in terms of dry handling and braking without abandoning wet performance and noise comfort. The P Zero Corsa System incorporates Pirelli's racing experience to enhance driving satisfaction at the limits.

P Zero Corsa System includes P Zero Corsa Direzionale tires for the front and P Zero Corsa Asimmetrico tires for the rear. The directional front tires penetrate the water surface, clearing a path for the rears, which complete water dispersal for increased driving control.

Bro

 

I read that, but the Corsa System has been around for a while at the same time as the Corsa (non-System). It's also wrong in that the Corsa was not the GT3 OEM tire for 2005. At least mine came with Pirelli Rosso tires!

 

Me either (my car is 3000-3160 depending on fuel load).

 

Nor have I. The temps must be right, but not difficult to do and no different than my experience with other r-compund tires.

 

i dont find mpsc dangerous, but it is more sensitive to camber and temp than RA1 and also takes a lap or two to warm up, but great tires though.

RA is less sensitive, i them them hot 38-40 for SM, M3 or 996C2. you can go out fast the first lap. they can be driven on street and last a bit longer than mpsc and a tad cheaper. not as grippy though.

 

I had MPSC's on my 993 (2800lbs) and ran pretty good at Road Atlanta in 03. But when I took them to Putnam I was way off the mark at least 1.5 seconds slower than I ran on the Hoosiers.
One thing I learned on the MPSC's is that they created some very intense high speed oversteer situation and in slow corners they really wanted to push. Turn 12 at Road Atlanta was one example. After using them for a few races I gave up on them and went much faster on the Hoosiers.

 

greg,

how long does hoosiers last, in terms of mile or hours?
easy to warm up?
i fear that i will sooner or later move the the dark side of hoohoos.

 

Those friends of mine who have driven both MPSCs and Hoosiers found the same thing. However, there is the usual trade off in tire life.