I've been running Toyo RA1's on all of my old cars, street and track, and they required -neg camber too. The R888 fitment will fit the turbo so I wanted to try it out, but Toyo's site says that they require at least -2.5 camber to -5.0 for them to work properly. I'm new to turbo world so I wasn't sure how much neg camber could be dialed in on the stock suspension before having to change to camber plates. After using R compounds it's hard for me to go back to normal performance tires. RA1's were brilliant on the street (left @ full tread depth) and so I figured the R888 would be too. I thought about Mich. Sport Cup's but keep reading how they take too long to get up to a non-slipping temp. (This topic was posted yesterday, but for some reason it won't let me add a reply to any forum topics so I have to start a new thread)

 

You can usually squeeze about -1.5 front camber out of the stock components.

 

you can add 10 mm of shims and get one more degree negative which is marginal for those tires but will get the job done

 

What are you shiming?

 

Gt2/GT3 lower control arms..... I guess Tim

 

between the lower control arm and the bearing...15 and 16 in the attached pdf...this is for GT2/3 don't know if TT is different...you can get a 7mm and a 3mm to make up the 10mm

 

That's what I thought. TT uses one-piece control arms - no way to shim.

 

I am thinking it may be better for a street car to run the best street tire instead of trying to force an R compound to do street duty on a suspension not able to utilize the grip. my 2 cents.

 

hey TK, you run the turbo...sounds from your comments that he needs more than neg camber to run R compounds...what is the wish list for a TT?

 

Hi... That is the GT2/3 lower control arms..... The turbo does not have the same control arms............. Tim

 

I run the R888's on the street and they're just awesome. I'd even go as far as saying that you might get 10k miles out of them.

 

I have been running them on the street a little as well between track outings, grip is just fantastic although you must jack the pressure up on the street for them to wear well. Btw I'm not running more then -2 degrees camber, my shop does rae alignments and cup cars but somehow they can't dial of in per my asking blah! Just realized I am not getting full benefit of the ties if optimal camber is -2.5, I noticed the bite up front in turns especially when the tires are cooking is kind of vague feeling :/

 

Had the RA1 245/40/18 & 335/30/18. Loved them. Now have R888 in same specs. Stick just as well but are noisy. I'd do the 888 again. I have -1.4 all around. Car sticks to the point where I truly miss sliding around.

 

I've been running Michelin Pilot Sport Cups without problem. They come up to temp just fine, due to the 996TTs weight. 1.5 laps at the most and you're there... I generally get 10-14 days out of them, and strangely, I get more days on the rears than the fronts... I shoot for 32 front HOT and 36 rear HOT. I start off with them at 24 front COLD and 28 rear COLD. I'm running 2 degrees negative in the rear and 1.5 negative up front. I do plan to upgrade to the GT3 control arm and shims, but that'll probably be over the winter. The R888 has had great reviews and the only things negative I've read are the weight of them and that you have to store them in a climate controlled area in the winter because they'll crack below 34 degrees.

Mike

 

-2 rear, -2.2 front, if I was RWD, I would be even more neg camber up front, just driving preference