Setup numbers RS
#527
Rennlist Member
However it does drop the car more in the rear (-1.9in) than the front (-1.1 in).
if you went with 235/345, you would retain the electronics, very slightly wider fronts then oem, much wider rears (0.9 in) and the front rear height drop would be more even, -1.7in up front and -1.9 in the rear.
#530
Thanks for the kind words. 157 or so back and 138 front. Mark's car was definitely getting a higher MPH than mine with the exhaust mods.
#531
Rennlist Member
this one?
Here's the video I promised. 2016 GT3 RS with:
HRE R101s 19x9.5 19x12
Hoosier R7s 265/35-19 and 325/30-19
yes I have, it says you run essentially the same sizes as the GT3.
I went back through my post and I made a mistake, The people I know are running 345's tire, in the rear, not 325. My apologies, I will go back and correct that!
So to summarize,
265/325 TC & SC works as shown by m3irish
235/345 TC & SC works
265/345 TC & SC does not work.
Here's the video I promised. 2016 GT3 RS with:
HRE R101s 19x9.5 19x12
Hoosier R7s 265/35-19 and 325/30-19
yes I have, it says you run essentially the same sizes as the GT3.
I went back through my post and I made a mistake, The people I know are running 345's tire, in the rear, not 325. My apologies, I will go back and correct that!
So to summarize,
265/325 TC & SC works as shown by m3irish
235/345 TC & SC works
265/345 TC & SC does not work.
#532
this one?
Here's the video I promised. 2016 GT3 RS with:
HRE R101s 19x9.5 19x12
Hoosier R7s 265/35-19 and 325/30-19
yes I have, it says you run essentially the same sizes as the GT3.
I went back through my post and I made a mistake, The people I know are running 345's tire, in the rear, not 325. My apologies, I will go back and correct that!
So to summarize,
265/325 TC & SC works as shown by m3irish
235/345 TC & SC works
265/345 TC & SC does not work.
Here's the video I promised. 2016 GT3 RS with:
HRE R101s 19x9.5 19x12
Hoosier R7s 265/35-19 and 325/30-19
yes I have, it says you run essentially the same sizes as the GT3.
I went back through my post and I made a mistake, The people I know are running 345's tire, in the rear, not 325. My apologies, I will go back and correct that!
So to summarize,
265/325 TC & SC works as shown by m3irish
235/345 TC & SC works
265/345 TC & SC does not work.
Wouldn't the 265/35-19 and 345/30-19 have a smaller change from stock than the 265/35-19 and 325/30-19 that I ran? I'll likely order a set of the 265/345 for my track day at the end of the month to see how that goes.
As a side note for those looking to save money going to R7s over the factory tires. Yes, you go faster and the tires run out faster. There's no savings from what I've seen. More expense actually. Although, I told, and still try to tell myself it was an economical decision to go 19s.
#533
Rennlist Member
Don't worry about it! We're just trying to get the right info out there to help others. The more discussion the better!
It's exactly the size I'm running on my 991 GT3.
I think the problem is not the width of the tires but the diameter.
OEM front are 27.3 inches in diameter
OEM rear are 28.7 inches in diameter
hoosiers 235 are 25.6 inches in diameter so 1.7 inches lower than stock fronts
hoosiers 265 are 26.2 inches in diameter so 1.1 inches lower than stock fronts
hoosiers 345 and 325 are 26.8 inches in diameter so 1.9 inches lower than stock rears (I know, 345's should be higher than the 325 but as per hoosier specs they are the same diameter.)
I think it's that height difference that throws off the TC and SC.
You and me both! 19's only get you a faster tire, not a much cheaper one
It's exactly the size I'm running on my 991 GT3.
OEM front are 27.3 inches in diameter
OEM rear are 28.7 inches in diameter
hoosiers 235 are 25.6 inches in diameter so 1.7 inches lower than stock fronts
hoosiers 265 are 26.2 inches in diameter so 1.1 inches lower than stock fronts
hoosiers 345 and 325 are 26.8 inches in diameter so 1.9 inches lower than stock rears (I know, 345's should be higher than the 325 but as per hoosier specs they are the same diameter.)
I think it's that height difference that throws off the TC and SC.
As a side note for those looking to save money going to R7s over the factory tires. Yes, you go faster and the tires run out faster. There's no savings from what I've seen. More expense actually. Although, I told, and still try to tell myself it was an economical decision to go 19s.
#534
Rennlist Member
I apologize for giving you a hard time. What do you mean when you say "the same size as the GT3"?
Wouldn't the 265/35-19 and 345/30-19 have a smaller change from stock than the 265/35-19 and 325/30-19 that I ran? I'll likely order a set of the 265/345 for my track day at the end of the month to see how that goes.
As a side note for those looking to save money going to R7s over the factory tires. Yes, you go faster and the tires run out faster. There's no savings from what I've seen. More expense actually. Although, I told, and still try to tell myself it was an economical decision to go 19s.
Wouldn't the 265/35-19 and 345/30-19 have a smaller change from stock than the 265/35-19 and 325/30-19 that I ran? I'll likely order a set of the 265/345 for my track day at the end of the month to see how that goes.
As a side note for those looking to save money going to R7s over the factory tires. Yes, you go faster and the tires run out faster. There's no savings from what I've seen. More expense actually. Although, I told, and still try to tell myself it was an economical decision to go 19s.
Don't worry about it! We're just trying to get the right info out there to help others. The more discussion the better!
It's exactly the size I'm running on my 991 GT3.
I think the problem is not the width of the tires but the diameter.
OEM front are 27.3 inches in diameter
OEM rear are 28.7 inches in diameter
hoosiers 235 are 25.6 inches in diameter so 1.7 inches lower than stock fronts
hoosiers 265 are 26.2 inches in diameter so 1.1 inches lower than stock fronts
hoosiers 345 and 325 are 26.8 inches in diameter so 1.9 inches lower than stock rears (I know, 345's should be higher than the 325 but as per hoosier specs they are the same diameter.)
I think it's that height difference that throws off the TC and SC.
You and me both! 19's only get you a faster tire, not a much cheaper one
It's exactly the size I'm running on my 991 GT3.
I think the problem is not the width of the tires but the diameter.
OEM front are 27.3 inches in diameter
OEM rear are 28.7 inches in diameter
hoosiers 235 are 25.6 inches in diameter so 1.7 inches lower than stock fronts
hoosiers 265 are 26.2 inches in diameter so 1.1 inches lower than stock fronts
hoosiers 345 and 325 are 26.8 inches in diameter so 1.9 inches lower than stock rears (I know, 345's should be higher than the 325 but as per hoosier specs they are the same diameter.)
I think it's that height difference that throws off the TC and SC.
You and me both! 19's only get you a faster tire, not a much cheaper one
Reading my post I realized you are right, since you ran 265/325 and it worked fine, there's no reason the 265/345 combo should not work since the 325 and 345 have the same diameter
let me ask around and get back to you
#536
Figured I'd throw out a little more data. Running the R7s (23ish psi cold and low 30's hot) with -2.7F and -2.9R camber worked ok. Front roll over looked great. The rear could use a little more roll stiffness or added camber as the wear was going further down the shoulder than I wanted. Same story with the stock Dunlops.
It did seems like the rear was struggling grip wise in steady state cornering and putting the power down on exit. Rear sway was set to full stiff with the front on full soft (front end feels good). I'm thinking about going to medium on the rear swaybar and adding another -0.3 of camber in the rear before the next track day for some added confidence.
It did seems like the rear was struggling grip wise in steady state cornering and putting the power down on exit. Rear sway was set to full stiff with the front on full soft (front end feels good). I'm thinking about going to medium on the rear swaybar and adding another -0.3 of camber in the rear before the next track day for some added confidence.
#538
Rennlist Member
Thread Starter
^^ Strange, I think it has plenty of downforce. if I add anything more it slows the car down too much in the straights..
RS time is too be had through tires and suspension me thinks..
RS time is too be had through tires and suspension me thinks..
#539