Ideal Air/Fuel ratio...
Ideal Air/Fuel ratio...
I was wondering for a NA Max what is the ideal Air/Fuel Ratio? My dyno shows that i'm running kinda rich on in midrange and rich at redline. (4000-5000 & 6000-6500 as low as 11:1)
Ideal is 14.7:1. As I've gathered from these forums, Nissans run a little rich, but not like what you have. I suggest you do some maintenance, like change the air filter, check/clean your MAF (use electrical parts cleaner from Radio Shack) and maybe replace your O2 sensors etc.
DW
DW
Originally posted by dwapenyi
Ideal is 14.7:1. As I've gathered from these forums, Nissans run a little rich, but not like what you have. I suggest you do some maintenance, like change the air filter, check/clean your MAF (use electrical parts cleaner from Radio Shack) and maybe replace your O2 sensors etc.
DW
Ideal is 14.7:1. As I've gathered from these forums, Nissans run a little rich, but not like what you have. I suggest you do some maintenance, like change the air filter, check/clean your MAF (use electrical parts cleaner from Radio Shack) and maybe replace your O2 sensors etc.
DW
I thought 12.1:1 was ideal.
Maybe 12.1:1 is ideal only for boosted cars....I dunno.
That's the ideal, or perfect ratio, stoichiometric. I vaguely recall on the dyno for my car, 98 5 speed, I was reading a 12.4:1 at hi rpms. I was told it was a bit rich but not a major issue. Nothing a tune-up wouldn't fix.
DW
DW
Originally posted by iansw
Not disputing, but are you sure of that?
I thought 12.1:1 was ideal.
Maybe 12.1:1 is ideal only for boosted cars....I dunno.
Not disputing, but are you sure of that?
I thought 12.1:1 was ideal.
Maybe 12.1:1 is ideal only for boosted cars....I dunno.
Originally posted by dwapenyi
That's the ideal, or perfect ratio, stoichiometric. I vaguely recall on the dyno for my car, 98 5 speed, I was reading a 12.4:1 at hi rpms. I was told it was a bit rich but not a major issue. Nothing a tune-up wouldn't fix.
DW
That's the ideal, or perfect ratio, stoichiometric. I vaguely recall on the dyno for my car, 98 5 speed, I was reading a 12.4:1 at hi rpms. I was told it was a bit rich but not a major issue. Nothing a tune-up wouldn't fix.
DW
That would add a good chunk of hp for free.....
Someone confirm this!
I know most of the people that use a SAFC is boosted but is the A/F still the same if I'm NA compared to SC or TC?(I know that theres only a minimal if any gains with a SAFC) I just bought one and would like to know what the ratio should be set to across the board ideally. (I am planning on getting boost later on) but for now I would still be NA, I'll probably be dynoing it in a few weeks from now though.
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Joined: Sep 2000
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Originally posted by jcy98maxse
I know most of the people that use a SAFC is boosted but is the A/F still the same if I'm NA compared to SC or TC?(I know that theres only a minimal if any gains with a SAFC) I just bought one and would like to know what the ratio should be set to across the board ideally. (I am planning on getting boost later on) but for now I would still be NA, I'll probably be dynoing it in a few weeks from now though.
I know most of the people that use a SAFC is boosted but is the A/F still the same if I'm NA compared to SC or TC?(I know that theres only a minimal if any gains with a SAFC) I just bought one and would like to know what the ratio should be set to across the board ideally. (I am planning on getting boost later on) but for now I would still be NA, I'll probably be dynoing it in a few weeks from now though.
Anybody......would setting it to like 13 to 14:1 ratio yeild a better hp?
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