Rom Tune ? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

steve shadows · 04-23-2007, 05:45 PM

Quote:

Originally Posted by timtiminy

okay I think the whole 12.5:1 afr subject can be put to death as the person that replied to me that has used his ecu said that his sr was running a bit rich so there is no way it was running a 12.5:1 afr. hopefully we can get jason on here and he can answer questions and give us all a bit of insite on his tunes. Hopefully he'll do a zilvia.net special on his tunes in order to get zilvia.net feedback. I think that would be a good idea for his bussiness.

Yeah your explanation is too vague in the first place.

I mean how does he know its running rich? by smelling it?

If he does a zilvia special i hope he can at least tell us what type of

lamda meter he uses to tune by.

PS. AFR is ok

but LAMDA is a btter rule to tune by

johngriff · 04-23-2007, 06:19 PM

afr is directly proportional to cylinder temp. Heat is the main cause of detonation, and it is the function being controlled by fuel tuning. We all would love a complete burn, but are very limited by poor octane fuel. There are no mainstream ROM's for racegas, that is why all the rom's you see will be in the 12's for na and 11's for turbo (jwt 10.8 z's in the 90's.. rofl).

04-23-2007, 06:19 PM	#2
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	afr is directly proportional to cylinder temp. Heat is the main cause of detonation, and it is the function being controlled by fuel tuning. We all would love a complete burn, but are very limited by poor octane fuel. There are no mainstream ROM's for racegas, that is why all the rom's you see will be in the 12's for na and 11's for turbo (jwt 10.8 z's in the 90's.. rofl). __________________ [email protected]