I have been trying to find a Thread that answers my questions and have been unsuccessful. Instead I decided to start a new Thread and I apologize for any redundancies.
I just completed my build of a MARK III and I am just awaiting paperwork to make it street legal. I have been driving the it around the neighborhood in the meantime and have been having some front tire rubbing issues. I have performed an initial front end alignment using a SPC Pro-Series FasTrax Camber/Caster Gauge and plan to adjust accordingly after I've been able to get it on the road more. The car is basically 1991 Mustang GT donor car with a 4 to 5 lug conversion. Ride height is set at 4.5" measured from the 4" frame tubes at all four corners.
Here is the tire/wheel setup I am running:
- American Racing Torq Thrust Wheel 17”x8” Vintage
- 4.5" backspacing
- 245/45 ZR17 95W Nitto NT 555 tires
- The tires stick out about 1/2" outboard from the fender on the front (equally on both sides)
I called FF prior purchasing this tire/wheel combination and FF informed me I should be ok and may have some issues with rubbing if I were to hit a bump while turning. Unfortunately, the rubbing is happening when I hit a bump going straight.
I've read on the forum about wheel/tire combinations and I seem to be within the norm for tire size. My only concern is the 4.5" backspacing (FF recommends nothing greater than 3.75" up front). Is my problem the backspacing or can this issue be mitigated with alignment or suspension adjustments? Any help would be greatly appreciated as I would prefer to keep the same tire/wheel combination.
Thanks.
Scott