fuel tuning

chrono_killa · Post by **chrono_killa** » Fri Jan 18, 2008 1:49 am

so i just got done building my N/A motor (mag head, crane 14, dohc piston, mag header)

is there anything i should do fuel wise?

DOHCRT · Post by **DOHCRT** » Fri Jan 18, 2008 2:49 am

Get an SAFC or some other form of piggy back controller. If you want to tune it yourself, invest in a wideband. Stock injectors should be fine. What PCM are you using?

chrono_killa · Post by **chrono_killa** » Fri Jan 18, 2008 4:45 am

stock pcm. i have a sohc. going to get a dohc mopar pcm for the rev limiter. would i need to mess with the fuel more while using a dohc pcm on a sohc engine

DOHCRT · Post by **DOHCRT** » Fri Jan 18, 2008 9:12 am

Its hard to say. Your engine's fuel requirements have changed, so you would just be guessing.

If you have a means of tunning the engine you will be able to get more power out of it.

infil · Post by **infil** » Fri Jan 18, 2008 2:03 pm

i'm running a bit less compression and run rich as hell. I would lean away from an AFC as i've yet to have a good experience with one. Honestly i wouldn't worry about it too much, good set of 19lb injectors(good set being balanced) and you'll be fine.

chrono_killa · Post by **chrono_killa** » Fri Jan 18, 2008 11:55 pm

so a safc isnt a must? and bigger injectors should do the make it a bit better?

DOHCRT · Post by **DOHCRT** » Sat Jan 19, 2008 9:50 pm

19lb injectors are stock. You probably wont need any bigger. The problem with the SAFC is that everyone is too cheap to use a dyno while tuning with one. Its hard to correctly tune with one on the street unless you have a method of data logging.

If you don't get some form of fuel controller, you have no way to tune it. You may be better off having a few dyno runs done with a wideband attached so you can determine if you need to make any adjustments.