penguininatux

blew some ringlands with an FMU ( i will die before i use one again...) but anyways decided to go with some new engine management. so picked up a new SAFC II, 460cc injectors, msd BTM, and Innovate wideband 02. The injectors should be here tomarrow, and i was plannin on throwing them in. But for tuning, i was wondering where i should put the wideband 02. because i have an open dumptune right now. Im guessing in the dumptube, because that's the exhaust gasses from the "full throttle" combustions. and even if some of the exhaust is exiting Via downpipe it wont make a difference because its all in "ratio" (the exhaust gasses exiting the dumptube and downpipe have the same A/f Ratio). AM i right? or should i have the dumptube welded before i tune? anyways. let me know.

oh and to start out with the SAFC II at 9 psi with 460cc. I read the "FAQ" in tech to run the same amount of fuel as stock injectors or w/e, but as far as boost. how much % should i go over in relation to rpm and throttle.?

stock are like 210cc ish..

Anyways. never used a SAFC with new injectors before so any help would be appreciated. Im not thinking of trying to tune without a full understanding of everything.

Thanks

Dan.

SpankedYA!

Dan it goes in your exhaust. Not your dump tube.

penguininatux

.

penguininatux

..... but at full throttle there's more exhaust exiting the dumptube than downpipe. (external wg). and i was wondering if it'd be more effective/accurate.

Boosted_StinkyNuts

Tune in part throttle...

penguininatux

lol that doesnt anwer my question. but why part throttle?. The SAFC has variable low throttle, and different fuel correction for high throttle.?? but again. i dont know that much about tuning.. keep the feedback coming i guess.

thanks.

boosted_b16

put the damn wideband 02 sensor in the downpipe about 8-12 inches down from the turbo, I would start you afc numbers with like -36 across the board, then let it idle and warm up all the way, then adjust your low throttle setting for 1,000 rpm (idle) untill you get about 15:1 afr's, then start out driving around at part throttle, and adjust the part throttle incriments untill you get between 14:1-16:1 afr's across the board when your cruising around at part throttle, remember that your most important part (low) throttle settings are from 1,000 rpm to about 4-5,000 rpm, because you probably wont do any part throttle driving above 5,000 rpm, so you can just set everything above 5,000 rpm the same as the 5,000 rpm setting, then set your high throttle engaugment point for around 70%, and just like stated above, the lower incriments (1,000 rpm to 3,000 rpm) on high thottle dont mean a whole lot, because you probably wont be at 70+% throttle and spooling the turbo when your below 3,000 rpm, anyway, adjust your high throttle settings at wide open throttle, untill you get between 11.5:1-12.5:1 afr's across the board while your stomping on the gas pedal, if you do what i have told you to do, you will still get decent mpg when your cruising around, and not blow the motor up when boosting, just remember when your tuning idle and part throttle, if its way rivh or lean, it wont damamge the motor, the worst it will do is foul out the plugs if it's too rich, but when you start tuning the WOT in boost, if you see any number on the wideband above 13:1, stop and add fuel before you go any further.....happy boosting ------...

FooK

wild guess, id say he's not tuning a honda

wideband goes in the downpipe, get it a good distance away from the turbo, less heat, the sensor will last longer.

what makes you think that the excess of exhaust dumped to control boost levels is going to exceed that of what is coming from your exhaust? not likely.

Boosted_StinkyNuts

Maybe its just me but i like to conserve gas and get a more efficent streetable tune. Unless your gonna be constantly driving with the gas mashed why would you tune "just" full throttle. Check out the FAQ and do the injetor math to find your base setting... Im pretty damn sure its not gonna be -36 but then again me not no math good :1

FooK

a tuned car is tuned fully, in all throttle ranges, at all engine loads, and at all rpms that the engine is capable of.