biggest tire
04-03-2002, 08:00 PM
#4
Racer
Join Date: Mar 2002
Location: Vancouver, Canada
Posts: 257
Likes: 0
Received 0 Likes
on
0 Posts
What's the biggest tire you can fit in 944 fenders without rub? I run a 225/40/16 on the back of my 924, and you guys have an extra inch or so of flare... 245 or 255?
04-04-2002, 09:48 AM
#7
Instructor
Join Date: Jun 2001
Location: Phila. area
Posts: 178
Likes: 0
Received 0 Likes
on
0 Posts
Hey Danno or anyone else,
I purchased 4 (rear size) (9") 993 wheels for my 88 944tS for my track tires and I like to run 245/275 or 255/275 or 245/255 or 255 all around. I have even seen guys running 275's all around. Which do you think is best? And I noticed you saying to avoid the 3 bar (S-2) fuel regulator and I don't know why. I got mine from Paragone and I do't know if it is a S-2 or not, but it is 3.0 bar. My car has the Autothority stage II chips with the LBE. The boost guage goes up to 2 or slightly past. I don't remember if I put back my stock banjo bolt or not but I found my other one in the gurage yesterday and installedv it. Sometime today I'm going out for a test drive. In looking at the two banjo bolts it was hard to see any difference nor did I see any removable jet in either one. Last year I was concerned while at the track I may be a running a little lean during the long full boost situations so I installed a 3.0 bar fuel regulator. I did not notice any difference in performance but I thought my track gas milage decreased. It was always bad so I'm not sure. I'm going to put back the stock fule regulator (2.5 bar)and see if my track gas milage goes up. It seems impossible but I run a whole tank of 20 gallons in 100 to 120 track miles. I guess that the price to pay to have fun. I also guess I'm lucky my car has always run very strong after hearing some of the problems on this list. Would like to hear your opinions.
I purchased 4 (rear size) (9") 993 wheels for my 88 944tS for my track tires and I like to run 245/275 or 255/275 or 245/255 or 255 all around. I have even seen guys running 275's all around. Which do you think is best? And I noticed you saying to avoid the 3 bar (S-2) fuel regulator and I don't know why. I got mine from Paragone and I do't know if it is a S-2 or not, but it is 3.0 bar. My car has the Autothority stage II chips with the LBE. The boost guage goes up to 2 or slightly past. I don't remember if I put back my stock banjo bolt or not but I found my other one in the gurage yesterday and installedv it. Sometime today I'm going out for a test drive. In looking at the two banjo bolts it was hard to see any difference nor did I see any removable jet in either one. Last year I was concerned while at the track I may be a running a little lean during the long full boost situations so I installed a 3.0 bar fuel regulator. I did not notice any difference in performance but I thought my track gas milage decreased. It was always bad so I'm not sure. I'm going to put back the stock fule regulator (2.5 bar)and see if my track gas milage goes up. It seems impossible but I run a whole tank of 20 gallons in 100 to 120 track miles. I guess that the price to pay to have fun. I also guess I'm lucky my car has always run very strong after hearing some of the problems on this list. Would like to hear your opinions.
Trending Topics
04-06-2002, 03:06 AM
#8
Race Director
I'd go for a set of 255/40-17 tires all around at first. Then measure the clearances. Track tires don't last long, so the next time around, go to a larger tire if you have room. I suspect that going to 55mm offset from your original 65/60mm offsets that a 275/40-17 won't fit in the rear without rubbing.
As for the 3-bar FPR, keep it in the car and do some dyno testing. The AutoThority Stg.2 chips are well-known for their high-RPM leanness problem. That's partly because these chips were programmed for a perfectly bone-stock car with the only mods being their chips and banjo bolt. With a LBE, free-flow intake and exhaust, you'll be flowing more air than the configuration that the chips were programmed for. So a 3-bar FPR will give you 10% more fuel and would be a safe bet to prevent high-RPM leanness, detonation and engine damage.
As for the 3-bar FPR, keep it in the car and do some dyno testing. The AutoThority Stg.2 chips are well-known for their high-RPM leanness problem. That's partly because these chips were programmed for a perfectly bone-stock car with the only mods being their chips and banjo bolt. With a LBE, free-flow intake and exhaust, you'll be flowing more air than the configuration that the chips were programmed for. So a 3-bar FPR will give you 10% more fuel and would be a safe bet to prevent high-RPM leanness, detonation and engine damage.
04-11-2002, 09:56 AM
#10
Race Director
We gotta be careful here because we're talking about three different generation of cars with three different wheel offsets as stock equipment:
So in order to use 2" wider rims than stock, we'd need to add about 16mm more offset to the stock wheels (puts most of the extra width on the inside):
"What's the biggest tire you can fit in 944 fenders without rub?"
How about a set of 17x10/11.5" CCW wheels with 255/275mm Kumho VIctoracer tires?
Or maybe a set of 17x10.5/11.5" BBS Race wheels with Yokohama A032Rs in the same sizes?
- '86 - 23.3mm F/R
- '87-88 - 52.3mm F/R
- '88 TS - 65mm Front / 60mm Rear
So in order to use 2" wider rims than stock, we'd need to add about 16mm more offset to the stock wheels (puts most of the extra width on the inside):
- '86 - 35mm Front / 25mm Rear
- '87-88 - 65mm Front / 70mm Rear
- '88 TS - 75mm Front / 70mm Rear
"What's the biggest tire you can fit in 944 fenders without rub?"
How about a set of 17x10/11.5" CCW wheels with 255/275mm Kumho VIctoracer tires?
Or maybe a set of 17x10.5/11.5" BBS Race wheels with Yokohama A032Rs in the same sizes?
