Tuning
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From: Ride Naked
Tuning
So my plan was to tune to a specific A/F ratio across the board (but I'm used to turbo cars), but the guy I'm working with says we need to tune to the maximum torque, which can vary A/F in ratio depending on MAP/RPM.
Also, if I am right, what A/F ratio should I tune to?
This is an all-out race application.
-Dustin
Also, if I am right, what A/F ratio should I tune to?
This is an all-out race application.
-Dustin
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From: Easton, PA
Re: Tuning (krustindumm)
You need to go with the air/fuel that will provide the most amount of power. In a N/A application your not trying to cool down the combustion chamber to the extent as with FI. Typically 13.5:1 air/fuel in WOT/atmospheric conditions is what makes the most power, but each engine is different and some will require richer/leaner. Set up the car on the street with 13.5:1 as a reference air/fuel, then see what the dyno tells you.
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From: Ride Naked
Re: Tuning (50trim EK)
Cool, thanks.
So, just to make sure, are you saying that the a/f will be the same across the board, but what exactly it is will take work?
I also have an EGT on every cylinder, will that provide any usefull information for tuning other than a danger indicator?
-Dustin
So, just to make sure, are you saying that the a/f will be the same across the board, but what exactly it is will take work?
I also have an EGT on every cylinder, will that provide any usefull information for tuning other than a danger indicator?
-Dustin
Darth ModerVader
Joined: Jan 2001
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From: Mustafar
Re: Tuning (krustindumm)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by krustindumm »</TD></TR><TR><TD CLASS="quote">but the guy I'm working with says we need to tune to the maximum torque, which can vary A/F in ratio depending on MAP/RPM.</TD></TR></TABLE>
He is correct - tune for maximum power with a safe A/F mixture (i.e. not extremely lean or rich). The mixture will almost definitely vary across the rev range.
He is correct - tune for maximum power with a safe A/F mixture (i.e. not extremely lean or rich). The mixture will almost definitely vary across the rev range.
Darth ModerVader
Joined: Jan 2001
Posts: 11,539
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From: Mustafar
Re: Tuning (krustindumm)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by krustindumm »</TD></TR><TR><TD CLASS="quote">damn, that makes things complicaated.
-Dustin</TD></TR></TABLE>
That's why good tuners get paid the big bucks.
Actually, I don't think it's that complicated. Just keep an eye on the A/F graph as you're concentrating on the power curve, and you shouldn't have too much trouble figuring out where and how to adjust it.
-Dustin</TD></TR></TABLE>
That's why good tuners get paid the big bucks.
Actually, I don't think it's that complicated. Just keep an eye on the A/F graph as you're concentrating on the power curve, and you shouldn't have too much trouble figuring out where and how to adjust it.
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