do you do track days? or just autocross?

 

These days just autox. Use to do lots of track days back in my Corvette days.

 

gotcha

 

Maxed out for the wheel size.

I also see those with bigger tires hit the wheel well.

HDPE is differnt than auto x

 

It does not matter what you do with the car. If you get the correct offset you can fit the big tires without any problems. But its cool you keep tossing money at other parts while your tire and wheel choice hold you back. Even if you want to stick with a 245 you could pick a number of faster tires.

 

I haven't bought the flywheel yet.

 

On a 60 sec autox course these are worth 2-3 sec over street tires: https://www.rx8club.com/showthread.php?t=92269

On the road course depending on track length 2-5 sec a lap.

 

promises promises...

to funny..

beers

 

I never said light flywheels are ineffective mods. I have one on my Miata and consider them a great mod, especially for an underpowered car. But, for the circumstances referenced in this thread (being pulled out of a corner at 4,000 rpm in third by a high-torque car) the flywheel won't change the outcome, unless he was just *barely* being pulled.

The effects of a lightened flywheel are directly proportional to the angular acceleration of the crankshaft. Which is to say, the quicker your revs are climbing, the greater effect it has.

But yes, for two otherwise identical RX-8s, the car with the lightened flywheel would theoretically win every acceleration contest, although in the higher gears it woudn't be as obvious. If they were legal in stock class autocrossing every serious competitor would have one. Heck I wish I had one yesterday - perhaps then I wouldn't have been so humiliated by fastmike and that darn Solstice of his. But from the perspective of "fixing" the problem originally posted, the flywheel isn't going to do that.

 

I think the final drive will be a more helpful upgrade than the flywheel

 

I agree, also a lot more money though. also hard to find. (or is it just me?)