Fitting 335/30/18 Toyo R888 in the rear
Fitting 335/30/18 Toyo R888 in the rear
In my quest to get better traction I have optioned for a set of the new lightweight Forgestar F14s with some sticky R888 tires 245/335. I am wondering if anyone else has installed this setup and how they modified the inner plastics. I test fitted the rears last night and I see I need to either cut out or reshape the liners. I am worried about the lower IC hose vulnerability to road debris without the liners. And yes, I have the fenders rolled and -1.8 camber in the rear. Any thoughts?
Here are some pics comparing my 19X11" with 315/25 to the new 18X12" with 335/30:


Here are some pics comparing my 19X11" with 315/25 to the new 18X12" with 335/30:
Last edited by dgreen78; Sep 15, 2010 at 02:37 AM.
how's the offset on the wheels. if it's not to agressive I would space them out to be as far out as you can without the tire grabbing the quarter panel and then go to work on the fender liner. heat it up or/and cut. one thing to watch out for is that charge-pipe....dont wanna rub through that.
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997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
art had some drag raidals about that size that swelled up at speed n rubbed the inner liners and popped a tire at 215mph during a goliad run
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What are you using this car for??? Is this thing a drag car are you running road courses.
If you are running road courses, I hate to say it, but you are going to wrong way with this mod. I see in your sig you have a set of JIC coilovers...but no mention of a set of proper sway bars. It's a common misconception, but proper sway bars play a FAR great role in producing cornering grip as well as making the car more planted and confident while doing so. With the chassis properly setup, you'll be able to cut your lap times with tires that are OEM size.
If you are running road courses, I hate to say it, but you are going to wrong way with this mod. I see in your sig you have a set of JIC coilovers...but no mention of a set of proper sway bars. It's a common misconception, but proper sway bars play a FAR great role in producing cornering grip as well as making the car more planted and confident while doing so. With the chassis properly setup, you'll be able to cut your lap times with tires that are OEM size.
is the front or rear more important?
Take a heat gun to the rear fender liners, where the tires make contact. When hot and pliable, push in the plastic with something like a baseball. Hold that position until the plastic cools and will hold the shape. I moved the lower attachment point, for the drivers side, back about 1". ALSO, Before heating the plastic, bend the fender liner brackets back/inward 3/4" to 1". I actually removed the flimsy bracket on the drivers side, which seems to have the most clearance issues. Camber set for -2.0 all around.
Last edited by Zippy; Sep 15, 2010 at 08:39 PM.
Ahh, thanks Zipppy thats what I was looking for! Ill post pics up when I am done. I am not sure on the offsets of the wheels. I was told they were for a 997tt but will work great on my 996tt.
Needless to say it takes a lot of money/development/talented engineers to develop winning racecars. This is something that no other company that has the on track racing experience of TPC Racing that is producing professional level products for the general consumer!
I used GT3 swaybars with The Racers Group curved front drop links. They seems to do a good job. I think they were about $400 for the pair. I would be interested hearing what the more expensive units from TPCRacing bring to the table.
No problem. I put that together a few years ago for Tom Kerr when he was interested in getting into the same sizes we have.






