I'm sure this has been covered before. I searched without luck. What are everyones recommendations for FI rear ratios?

 

What type of driving will your car be geared for? (couldn't resist the pun lol)

 

As much as possible while still being able to achieve your desired "top speed" within a safe RPM range.

 

Honestly for highish boost 13/14 psi plus I'd just leave the stock in, it becomes and hindrance with more overall acceleration I don't think you can give wrong with leaving the stock fd in.

 

This needs answered before anyone can make a decent go at your question without being completly opended.

Evan

 

Are you SC or Turbo? FI is too general. Typically stock 4:10 is efficient at stock power up to about 500whp/350 trq and after that 3:90 is a popular choice, of course depending on what your primary use is, will dictate, but generally stock is pretty good over a broad use.

 

His sig says he is supercharged

 

Stock ratio for you.

 

I hate my 4.08, I think I'll still have to go into 5th in the 1/4 mile with the PPG.

I think over 500 you should think about 3.9s, over 700 3.73s?

 

You shouldn't have to go into 5th, I didn't with that setup when I went 9.9 at 142