Here's some food for thought:
http://www.bristoldyno.com/tech/airfuel.htm
"As far as power is concerned, I'll say only this: Every vehicle is different. If one wants to find the best air/fuel ratio for generating power, one should put the vehicle on a dyno and test it.
Many believe that a particular ratio will result in the most power under any circumstances, and that belief is just too narrow-minded. There are far too many factors involved to make such blanket statements."
"When performing dyno testing and tuning, one must ask oneself "what am I trying to achieve?" If maximum power is the goal, then just look at the power curve first and make adjustments accordingly. The fuel curve is only used as an aid. Many NA race car owners tune in this manner, and by the time they are done the air/fuel ratio is sometimes between 14:1 and 15:1. This is usually not considered "safe" by anyone, but most race car teams accept the fact that they usually change the engine at least once during a typical season. Most street car owners are willing to sacrifice the 3 - 5 hp that they might get by running so lean and instead opt for an air/fuel ratio that will help their engine last for many years."
I went on k20a.org and started a thread with:
"Ok so some one on clubrsx was criticizing me for advising people running NA setups to tune their WOT AFs to 13.2-13.6
He said: 'It's a known fact that the K20's make the most power NA when tuned to 12.9-13.1 A/F's.'
My question is, how valid is that statement?
Theoretically shouldn't even K20s make slightly more power when tuned a littler leaner, to 13.2-13.6?
And isn't it true that in reality it's impossible to say whether 12.9-13.1 OR 13.2-13.6 will make power in a motor until you test those different AFs with THAT SPECIFIC motor in question on a dyno?
Just trying to get a general consensus here and I am open to any enlightenment on this topic."
This is a quote from a knowledgeable k20a.org user in answer to my question: "
Depends on the fuel and the engine. You were pretty much right though,I've never heard of A/F's in the 12's being best on an N/A car."
I also posted the same questions in the ECU Tuning section of this forum, and this is the reply I've gotten so far: "
12.9-13.1 a/f is a safer more conservative tune. on K20's 13.2-13.6 a/f WILL make more power but 93+ octane is a must. Additionally, when tuning with 13.2-13.6 a/f it's absolutely critical to get ignition timing correctly to avoid knocking and detonation.
I'm not a tuning expert but as a reference Eric Medina from YOSOLO MOTORSPORTS is known by many to be one of, if not the best HONDA tuner in the east coast and he tunes around the 13.2-13.6 area. His power-bands are almost completely flat, consistently. The only person I know that can get 220whp out of a internally stock bolt on K20a2."
So it seems like the only reason to tune to 12.9-13.1 IF YOU DON'T PROVE IT MAKES MORE POWER ON A DYNO is to keep cylinder temps lower, which I mentioned before.
Suck a dick Bitch, or should I say "NOOB"? :awwyea: