Hi all
i like some frount and rear alignment for track and sprints tyres sizes 215x45x17





Adrian

 

Is this a question, or a comment? If you want a good, detailed answer please ask a detailed question and provide enough background information on your car to allow people to answer properly.

Do you have any way of adjusting camber? That's the first step, as the stock FC has essentially no camber adjustment stock, all that you can do really is toe and rotate the strut top in front which changes camber and caster.

If you search there's a number of racers who've posted alignment numbers for their race cars, mostly ITS cars.

 

Whoops for a Series 4 rx-7

the FC is setup as 29mm front swaybar
Stock rear swaybar
Front and rear strut braces
Tein super street shocks/springs
215/45/17's Toyo 888's tyres
All new bushes in front end and rear been changed (solid rear bush's)
except for the k-Frame

Set wheel alignment to Front, -4 camber, 3 castor, 0 toe in and Rear -2 camber 1.2 toe in.
Car feels good, a little bit of understeer feels like there could be grip but it's not getting it, should i have a differnen't alignment or go for bigger tyres?

Any help would be appreciated.

 

That's quite a bit of camber, have you checked the tire temps at all? That'll help you select the proper alignment numbers. I'd bet you can take some out of the rear, that'll help it loosen up a bit and get rid of the understeer. You could also reduce the rear toe a bit. Last time out I was at 1.3 degrees in the rear and I was still running a little hotter on the inside.

Depending on your wheel size and offset you should be able to fit up to about a 245/40/17 all around with rolled fenders and just the right offset. That'll definetely help get more grip. Another option is to go to shorter tires, like 225/45/15's which will get you closer to the ground (good) and give you shorter gearing (good). Some tires are wide for their size, and a 225/45/15 could be significantly wider than what you've got now.