Largest ET Street on an 85GT?

04-29-2001, 08:04 AM

A question for some of the True Street or drag radial racers out there: Will 28x12.5 ET STreets fit on an 85 Mustang without serious hammering on the wheel wells? The wells have already been rolled. If they will, what's the best rim size; 8, 9 or 10 inches? What about backspacing: 6.5 inches on 10 inch rim, 5.5 inches on 8 & 9 inch rims? We're trying to figure out what the largest tire is that we can run. The car is an 85GT with 363 stroker & 250HP shot of giggle gas with a C4. Previous best with the car is 9.18@149 on 28x10 ET Drags.

Thanks.

------------------
Jeff Chambers
T/S #3
11.655 Seconds/116.6 MPH
Chambers Racing Team

Rick 91GT · 05-01-2001, 04:24 PM

Jeff if I remember correctly the 6.5" back spacing is way too much for a Fox body, and even with the 6" you need to do some major work on the inner wells. I prefer to call them "massaging", I know I have seen a 84 or 85 with 28" x 11.5" ET STREETS on it but I have no idea what rim. I haven't seen that car in a long time either so he may not be around.

Will you be at the NMRA event in June at Maple Grove, in Reading PA?

------------------
Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

SLOWPONY · 05-02-2001, 08:09 AM

I belive Dave Hopper ran a 28 12.5 et street at Norwalk last year in true street. If you can get ahold of him, he may beable to help you out.

04-29-2001, 08:04 AM	#1
jchambers Guest Posts: n/a	Largest ET Street on an 85GT? A question for some of the True Street or drag radial racers out there: Will 28x12.5 ET STreets fit on an 85 Mustang without serious hammering on the wheel wells? The wells have already been rolled. If they will, what's the best rim size; 8, 9 or 10 inches? What about backspacing: 6.5 inches on 10 inch rim, 5.5 inches on 8 & 9 inch rims? We're trying to figure out what the largest tire is that we can run. The car is an 85GT with 363 stroker & 250HP shot of giggle gas with a C4. Previous best with the car is 9.18@149 on 28x10 ET Drags. Thanks. ------------------ Jeff Chambers T/S #3 11.655 Seconds/116.6 MPH Chambers Racing Team

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05-01-2001, 04:24 PM	#2
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	Jeff if I remember correctly the 6.5" back spacing is way too much for a Fox body, and even with the 6" you need to do some major work on the inner wells. I prefer to call them "massaging", I know I have seen a 84 or 85 with 28" x 11.5" ET STREETS on it but I have no idea what rim. I haven't seen that car in a long time either so he may not be around. Will you be at the NMRA event in June at Maple Grove, in Reading PA? ------------------ Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

05-02-2001, 08:09 AM	#3
SLOWPONY Registered Member Join Date: Nov 2000 Location: detroit,mi Posts: 27	I belive Dave Hopper ran a 28 12.5 et street at Norwalk last year in true street. If you can get ahold of him, he may beable to help you out.