996GT3 – standard width MPSC vs wider R888 query

[BrendonJ]

All,

As you probably know the standard size tyres on a mk2 996GT3 are:
Front: 235/40/18
Rear: 295/30/18

I have run R888’s and MPSC which seem to be the 2 best trackday tyres for this car. Both are great but the MPSC are better.

However I have heard some of the US boys are running wider tyres (on the standard rims), ie:
Front: 255/35/18
Rear: 315/30/18
However these sizes aren’t available in the MPSC but are available in the R888.

Thus my 2 questions are:
1. Has anyone run these wider sizes?
2. What are peoples thoughts re a wider R888 tyre vs a std size MPSC?

Many thanks,
BJ

[6C4GTS]

315/30/18 is fine on an 11 inch rim - 255 at the front may be pushing it for arch rubbing on lock?

[GT3-RS]

BrendonJ said:

All,

As you probably know the standard size tyres on a mk2 996GT3 are:
Front: 235/40/18
Rear: 295/30/18

I have run R888’s and MPSC which seem to be the 2 best trackday tyres for this car. Both are great but the MPSC are better.

However I have heard some of the US boys are running wider tyres (on the standard rims), ie:
Front: 255/35/18
Rear: 315/30/18
However these sizes aren’t available in the MPSC but are available in the R888.

Thus my 2 questions are:
1. Has anyone run these wider sizes?
2. What are peoples thoughts re a wider R888 tyre vs a std size MPSC?

Many thanks,
BJ

if the yanks are doing it then steer clear

[fioran0]

Did you get mistaken and think you were on the PCGB forum with that comment?

255/315 is about the optimum tyre width for the 996 assuming you want max rubber. It's the equivelant width for the Cup slicks. You really need 9j/11j for it and the right offset but I know there's a ton of variation on cars, especially on the rear with people using 12j.

Search rennlist and you will get a ton of info on what wheels etc people have these sizes on. You will probably need different wheels though.

The US is miles ahead on what you can and can't do with these cars as the club racing world is massive and the track day scene even larger.

255/315 is also available in PS2 if you want a street tyre in that size.

Edited by fioran0 on Thursday 6th October 09:59

[StuB]

Hi Brendan, get bored of the 355 in the end?

R888's seem to be in very short supply, post tsunami, so I've gone AD08's on my turbo.

My mate has a tuned 6GT2 on R888's and they're great for TD's IMHO, if you can find any! We were at Silverstone Arena (GP) mid Sept and FWIW they needed a bit more pressure than normal to generate the head & grip properly/

[GT3-RS]

fioran0 said:

Did you get mistaken and think you were on the PCGB forum with that comment?

255/315 is about the optimum tyre width for the 996 assuming you want max rubber. It's the equivelant width for the Cup slicks. You really need 9j/11j for it and the right offset but I know there's a ton of variation on cars, especially on the rear with people using 12j.

Search rennlist and you will get a ton of info on what wheels etc people have these sizes on. You will probably need different wheels though.

The US is miles ahead on what you can and can't do with these cars as the club racing world is massive and the track day scene even larger.

255/315 is also available in PS2 if you want a street tyre in that size.

Edited by fioran0 on Thursday 6th October 09:59

No I'm sure I'm on PH......you are funny.......miles ahead.....LOL

Edited by GT3-RS on Friday 7th October 08:05

[BrendonJ]

Hey Stu, have still got the 355 but its mainly used for summer trips/weekend jaunts (when its working). The GT3 is mainly a trackday toy and I am loving it.
I ran R888's on my previous (yellow) GT3 but have just worn thru a set of MPSC in 5 mths (ouch), they are a better tyre for track work than the 888's but apparently you can run the 888 in a wider size hence my query.

Fiorano, many thanks for your detailed post. Yep I think you're right re to run wider tyres on the front I would need a 9" wheel (as opposed to the std size 8.5").
I'm still unsure though re is a slightly wider r888 better than a standard size mpsc..

Many thanks

[SpeedFreakDave]

5 months but plenty of track days! I heard the 888 don't work on a GT3 as the car is too heavy and so they overheat quicker, I'd stick with the MPSC.

[keep it lit]

fioran0 said:

The US is miles ahead on what you can and can't do with these cars as the club racing world is massive and the track day scene even larger.

correct.