I was reading on JDM web page that with a flipchip it can shave appx .5 - .7 off of stock E/T's. Does anyone have a ball park figure on how much a #4 pulley will do...i was thinking maybe .2 or so does this sound right?

 

I totally agree with that claim. I gained between .2 - .3 secs and over 3 mph going from a 2 lb to a 4 lb. I'd say an easy .5 to .6 secs off of your stock times.

 

What wrightlightning said.

Dan

 

I ran a 13.27@102.2 stock

With a 4# pulley, JDM race progam and filter
ran a 12.62@107.17

Difference of .65 and 5 mph

Jason