what does everyone tune for under WOT???partial throttle??and idle??would it be dangerous to tune WOT for 14.7?and what about setting it to idle a little lean??like 15.1 or something?

 

Try it, check your plugs and tell us how it went.

 

WOT- whatever makes power
partial - 14.0

Oh, and virtually nobody knows how to read plugs correctly,so i wouldnt even bother.

 

Reading on the form for wideband O2 ( http://autos.groups.yahoo.com/...sages ), my recollection is that best power (WOT) is found at 12.5:1.

Best efficiency would be at 14.7, theoretically...

It's probably quite dependent upon your engine's setup (etc), so in some respects all you can do is tune, tune, tune...

Mark

 

i thought 12.5 wot a/f ratio is what to aim for under boost???

 

13.7 seems to work but this is such a vague question...

 

You need to tune the air/fuel for what the engine responds to best. All motor is different in that the compression ratio, combustion chamber shape, valve size, header design etc will all greatly effect how the engine will use the fuel in the combustion chamber.

 

What that guy said, with a little to add to it.

You can tune a car effectively without an A/F meter because the picture of the graph is going to tell the story just like the lamda meter.

And if you tune the car to the maximum HP, the car is going to have a perfect A/F ratio....because the car makes the most HP at this point! Its not going to make the most HP at 11:1, or 15:1...because no Honda motor likes that.

Its going to be around 13:1 to 13.7:1 in most cases.

People only tune turbo cars to 12:1 like me, and 12.5:1 like others to keep the heat down and be more reliable...

So back to the graph picture. If that graph is SMOOTH, I mean perfectly smooth, then the A/F is really damn good. If its all jagged and like an earthquake graph, then the A/F is off. The more jagged, the more off.

You can get away with tuning All motor Honda's, most of them, not all, with no A/F and just tune to max HP.

This applies to all cars without managment...with stock ECU's and fuel regulators..

With management, A/F meters are a must and it would take a long long time to tune without them.

JEff

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">what does everyone tune for under WOT???partial throttle??and idle??would it be dangerous to tune WOT for 14.7?and what about setting it to idle a little lean??like 15.1 or something?</TD></TR></TABLE>

you need to tell us which meter you're using first ... all meters will be different, magnitude depends on brand ...

generally a smooth curve will appear between 13.2ish to 13.8ish on a 4 valve honda motor (b & H series) ...

for turbo, stick to mid to high 12's don;t go into 13's unless you're on the road datalogging as you get on it and reading from a (good) wideband.

Greg

 

my recollection is that best power (WOT) is found at 12.5:1

That's just a hair too rich for almota.

mid to high 13's should work