HI All, it was suggested that I post this question here instead of in 4th gen. I have a 4th Gen Vtec lude, build date Dec 1994 so its OBDI.
I got my car retuned and then started reading stuff on LTFT. Being a 4th gen with OBDI do I have to worry about LTFT?
On my VAFC2, the tuner has set the low throttle setting to 10% and High throttle to 50% (factory VAFC2 setting). Is this ok to leave it like that? Or will my OBDI ECU detune the car?
Here is a dyno plot. 116kw = 158HP.
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I you no longer go for a gap that exist, you're no longer a racing driver" Ayrton Senna.
I am wondering if there is any benefit to having any corrections at all on Narr Thtl . . . Since my tuner only tuned the car at WOT. He says that he usually just dial in half of the correction at part throttle that he does at full throttle.
The only thing I can think of is that I may be getting better engine response since, leaning out with VAFC2 also increases ignition advance. But on the other hand, all I'd have to do is push my right foot down further . . . .
I am tempted to set the VAFC2 so that there are 0 corrections on Narr LVT. And I am beginning to question the benefit of having corrections on Narr Hvt.
__________________
I you no longer go for a gap that exist, you're no longer a racing driver" Ayrton Senna.
I am wondering if there is any benefit to having any corrections at all on Narr Thtl . . . Since my tuner only tuned the car at WOT. He says that he usually just dial in half of the correction at part throttle that he does at full throttle.
The only thing I can think of is that I may be getting better engine response since, leaning out with VAFC2 also increases ignition advance. But on the other hand, all I'd have to do is push my right foot down further . . . .
I am tempted to set the VAFC2 so that there are 0 corrections on Narr LVT. And I am beginning to question the benefit of having corrections on Narr Hvt.
Benefits? Better gas milage and less soot on the rear bumper!! I am OBDII and didn't tune narrrow because it totally messes with STFT; the ECU sees you are running lean and tries richening things up, in effect "detuning" your VAFC. What would be totally awesome is if there was a way to change what the ECU thinks is "too rich". I know there has to be a way out there.
I am wondering if there is any benefit to having any corrections at all on Narr Thtl . . . Since my tuner only tuned the car at WOT. He says that he usually just dial in half of the correction at part throttle that he does at full throttle.
The only thing I can think of is that I may be getting better engine response since, leaning out with VAFC2 also increases ignition advance. But on the other hand, all I'd have to do is push my right foot down further . . . .
I am tempted to set the VAFC2 so that there are 0 corrections on Narr LVT. And I am beginning to question the benefit of having corrections on Narr Hvt.
Did you read the VAFC tuning thread in the N/A Library? That addresses most of your questions here.
The short answer is no, you want low throttle to be zero across the board. VAFCs can only tune for WOT.
Does anyone know if either ECU (OBD1 or 2) actually looks at the TPS for the switch to open-loop? It just dawned on me that there is no actual setting for this, at least in Hondata, just a setpoint for the MAP signal.
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