DJ Galant
12-06-2002, 09:11 PM
I just got my car out of the dyno and i found out that my car is untuned. First of all, the results are 140 whp and max torque is 161 @ 6psi.
After that the guy who was driving it, and analyzed the graph said that I am lean out at WOT..... No matter what we did, we couldn't get the proper air/fuel mixture.......
The second run @ 9 psi thereore added 1 hp and max torque gained to 165.
3 psi more - and 1 hp gain ?
I have higgh impedia Denso 550cc injectors, warlbro 255 fuel pump, and FMU and - -------------------------- I am lean at WOT @ 6psi
It is unbelievable, and the numbers from the dyno are dissapointing me.
The good news is that it is fixable. It cost 150$ though to get it tuned to perfection. How many hours is it gonna take to get it tuned right? Who knows, well I hope someone of you knows.
The graph is not a like tangent - it is more like a sin curve.....
One pass was mad at 56% of throttle - and it was the same as it was on WOT.
That means that ECu is leaning out my mixture..or knock sensor advance the timing....anyway the can tune it.
I noted that (this is of Curt's website).
CAUTION: It is very important that you keep a POSITIVE STFT and LTFT. The 4G64 Spyder ECU is somewhat unique in this matter. If you have a NEGATIVE fuel trim (even STFT of -5%, with LTFT at ZERO), the ECU will lean out your Air/Fuel mixture badly at WOT (wide open throttle). I'm sure the Mitsubishi engineers did this for emissions reasons, but it caused all kinds of problems when I first started tuning my car. No matter what I did to the SAFC (even added +50% air), I could not get my engine to run the proper rich A/F ratio. Thus, I leaned out the car furthur, so that in closed loop operation it was adding fuel to compensate (i.e. POSITIVE STFT AND LTFT), and all my tuning problems were fixed. This is why you MUST have an OBDII datalogger. It's the only way to see the STFT and LTFT readings.
Now, I have 2 questions for u.
Do you think that ECU of Spuder is the same as mine 4g64 galant ECu???
(I am assuming that, so - I am going to ask you the next question).
Could u explain what POSITIVE STFT and LTFT are?
I don't know what that is, and how to set it to positive?
I would like to find out more about, how to tune it right.
I NEED HELP WITH TUNNIG MY SHIT....SO PLEASE HELP ME ANYONE!!!
THANKS
THANKS FOR YOUR HELP
After that the guy who was driving it, and analyzed the graph said that I am lean out at WOT..... No matter what we did, we couldn't get the proper air/fuel mixture.......
The second run @ 9 psi thereore added 1 hp and max torque gained to 165.
3 psi more - and 1 hp gain ?
I have higgh impedia Denso 550cc injectors, warlbro 255 fuel pump, and FMU and - -------------------------- I am lean at WOT @ 6psi
It is unbelievable, and the numbers from the dyno are dissapointing me.
The good news is that it is fixable. It cost 150$ though to get it tuned to perfection. How many hours is it gonna take to get it tuned right? Who knows, well I hope someone of you knows.
The graph is not a like tangent - it is more like a sin curve.....
One pass was mad at 56% of throttle - and it was the same as it was on WOT.
That means that ECu is leaning out my mixture..or knock sensor advance the timing....anyway the can tune it.
I noted that (this is of Curt's website).
CAUTION: It is very important that you keep a POSITIVE STFT and LTFT. The 4G64 Spyder ECU is somewhat unique in this matter. If you have a NEGATIVE fuel trim (even STFT of -5%, with LTFT at ZERO), the ECU will lean out your Air/Fuel mixture badly at WOT (wide open throttle). I'm sure the Mitsubishi engineers did this for emissions reasons, but it caused all kinds of problems when I first started tuning my car. No matter what I did to the SAFC (even added +50% air), I could not get my engine to run the proper rich A/F ratio. Thus, I leaned out the car furthur, so that in closed loop operation it was adding fuel to compensate (i.e. POSITIVE STFT AND LTFT), and all my tuning problems were fixed. This is why you MUST have an OBDII datalogger. It's the only way to see the STFT and LTFT readings.
Now, I have 2 questions for u.
Do you think that ECU of Spuder is the same as mine 4g64 galant ECu???
(I am assuming that, so - I am going to ask you the next question).
Could u explain what POSITIVE STFT and LTFT are?
I don't know what that is, and how to set it to positive?
I would like to find out more about, how to tune it right.
I NEED HELP WITH TUNNIG MY SHIT....SO PLEASE HELP ME ANYONE!!!
THANKS
THANKS FOR YOUR HELP