fastrax203

So as the title states I'm already tuned well on my 305cc injectors. I'm picking up some RX7 injectors and want to know what the easiest way to re-tune the car would be.

thirdgen

iTrader: (26)

I'd say, figure out what your current required fuel setting is, and change that number to whatever it would be for a 550. I used 13.2 for my stock injectors on my 99 and when I put my 460's in I use 6.9. I bet if you searched or took a poll of what others who use 550's run for their required fuel, you could find the number. By changin it, it won't give you a perfect tune, you'll still have to VEanalyze your fuel table, but you'll be close.

fastrax203

Thanks, sounds good. Ill give that a shot

malachi_fox

Hey fastrax, im using the 305 supra's and want to know your req fuel? I have mine set at 10.1 and think it may be a tad too much.

therieldeal

iTrader: (2)

req fuel is simple to set... use the built in calculator LOL. if you dont do it that way then it skews your entire map, and you'll have to do a full retune if you switch injector sizes.

miatauser884

iTrader: (11)

very easy using built in calculator. I went from 440s to 750s. Used calculator and started fine. Then used turnerstudio autoune to tune the idle.