Hi Guys,
just for my personal knowledge, do i need to retune my Fuel & Timing Maps after decreasing from a bigger injector (850cc) to stock 560cc?

Since my ride output is below 380awhp can i just swap in the 560cc and set the factory Scale & Latency and remain the current map which is tune under 850cc injectors?

Thanks

 

Sorry for the noob question but anyone to advise?

Thanks

 

provided that the fuel trims are exactly the same as they were on the 850s, then no. But that is highly unlikely so the fuel map would need to be adjusted.

this should only be done after ensuring your fuel trims are at their best level.

cheers

 

Thanks 07EvoIX,
say if i get my fuel trims at idle +/- 4.65 LTFT Low & LTFT InUse range is it acceptable?

To my exploration, usually the Scaling are the one which reflect my On boost & WOT AFR, thereby as long as my AFR is on the safe side during WOT & High Speed than i should not be too particular on the Idle trim right?

Mine is an Evo 5 so i cant log Fuel Trim Mid & High.

Do i need to bring down few deg's of timings after the smaller injector swap?

Thanks

 

Timing won't be affected if the fueling is the same.

 

Thanks Benja...