SilviaS13Drift

Im not really sure how rotary is suppose to be. but this thing has a S-AFC in it.. im not really sure how to tune it at all... but.... it runs pretty rich at idle... enough to blow out alittle smoke... is this normal? the compression on the engine is pretty good. all above 110 PSI.. anyone know much about tuning the S-AFC? or correct me on that matter...

Thanks

~Mike

SilviaS13Drift

..... YEAH RIGHT! I gotta figure out how to tune this bad boy first!!! lol... I was just boosting 12 PSI! 12 PSI feels good.. mmmmmmm

~Mike

The Ace

You cannt tell how much % to lower the S-AFC if you dont have a wide O2. You can just experiment and hope you dont lean out too much....

However, your S-AFC should not be too rich at idle. The first thing that you do when you get a fuel computer is to lean out the idle (because it is already too rich from the factory). Then you bump up the higher rpms (in order to be safe) and then you start to lean out in order to maximize HP output, but only on a dyno or using a wide band.

You can start by lowering the fuel 4-5%, but that wont make any difference...Make sure that you keep the fuel curve nice and smooth, because a irregular and "angular" fuel curve is usually a bad curve