What is the widest size tire I can run on 1990 mustang convt. I'm going with a staggered set-up so the back tires will be wider than the front. 17 by 9's in the back and 17 by 8's in the front. What do you guys think is the best tire combo?
Not sure how much this is contributing , but I have fit a 275/50/15 on 10 holes under the 84 bird before and DD-ed it for about a week.... till it rained
A 275 is about the limit without making modifications. It's advised to keep it around a 245 in the front because it could get tire rub when turning hard.
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I have 245's all around. They rub a bit in front and don't have enough traction in back. I think I'll go with 235's up front and 255's in the rear pretty soon.
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Remember when sex was safe and skydiving was dangerous? 1991 Ford Mustang LX Hatch 351W powerdyne'd, trickflow heads, victor jr intake, fms headers, bassani x pipe, mac 2.5" exhaust, lentech tranny, motorsport 8.8, subrame connectors, saleen racecraft springs, BBK cambers, hotchkins rear arms w/swaybar, 5 lug conversion, 4 point roll bar, PA performance 130A alternator, taurus electric fan w/Flexalite VSC. Getting put in this week: Stage 2 methanol injection, 6600 series chip custom program.
Removing the Quad Shocks is not a good idea, flipping them for extra clearance is.
Why not, if you have a decent rear control arm set-up then they aren't required. I've been running without them for over 3 years now wit ha car I drag race, corner carve, drive on the freeways, around town, its never had a problem.
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Jesse Berger 90 LX, Previous 4 cyl. (Decommissioned, 351W on the way)
H/C/I+Bolt Ons
Best ET: 12.54@106 mph 2001 V6 5 Speed Daily Driver Windstar Intake, Dual Exhuast, CAI, Headers
Best ET: 15.6@88 mph (stock trim)
Why not, if you have a decent rear control arm set-up then they aren't required. I've been running without them for over 3 years now wit ha car I drag race, corner carve, drive on the freeways, around town, its never had a problem.
You answered your own question! You said that "You" have not had problems without them, but Fox Stangs were built to such Liberal Tolerances that no 2 are the same, so just because you got away with it does not mean it is an across the board thing for everybody.
I have also removed the quad shocks I put on ( not factory, but i installed them) when I run the 275's and I also have no problems. I have CHE upper and lower control arms
Widest size tires on a 1990 mustang convt. 
