agreed. large AFM corrections = wacky timing stuff. use fuel press to get you close, fine tune w/AFM corrections.....shaeff said:i don't think it's a poor way of tuning. i don't think it should be the ONLY way of tuning, but coupled with an SAFC or a MAFT /MAFTpro unit, it can be valuable.
i gained 14-15rwhp by dropping fuel pressure on the dyno...
TCCS will always attempt to achieve stoich closed loop....regardless of what you do. the trick is to tune so as to maintain proper A/F @ WOT and proper Vf.LordLo said:Yeah a while back I mentioned using a SAFCII to prevent the 7m from running rich, but a few of you suggested that the TCCS would not let you adjust the amount of fuel being injected and will just compensate for it thus rendering the fuel computer useless, until WOT.
So does the AFPR in a sense override the TCCS?
So when does the ECU allow fuel corrections? 50%+ throttle?PM-Performance said:?
a fuel computer isnt useless. Its only really useless at part throttle because the ECU does the work. You can help it a little if you have huge injectors with the SAFC at part throttle. but the ecu will do most of the correction.
at wot is most deffinately helps
Hey Doc,drjonez said:idle is closed loop, albeit @ a slower rate....
Stock base FP is 33-40PSI. That is with the vacuum off and plugged. Set it on the high side to be safe then work from there.Suprastar88t said:I'm just getting my FPR installed this week,what pressure should I set it at? And once I get it installed I can add my VPC and SAFC,are those hard to learn to tune with?
I guess i'm blanking right now, what is Vf?drjonez said:TCCS will always attempt to achieve stoich closed loop....regardless of what you do. the trick is to tune so as to maintain proper A/F @ WOT and proper Vf.
When ever you're in open loop mode, which (please correct me if I'm wrong) occurs based on coolant temp and throttle position. So if your TPS is disconnected, ECU is effectivly bypassed or if you run no thermostat or a lower temp thermostat (160F I think???).LordLo said:So when does the ECU allow fuel corrections? 50%+ throttle?