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*DandyMax* · 07-02-2007, 06:35 PM

eng92 is correct in that timing is the key, and if you need to be richer to run higher timing then it's worth it to do so.

Having said that however, it's my opinion based on my experience (and others like Jime) that VQ's (3.0 and 3.5) can get away with running optimal timing at a lean-ish AFR of 13.0 to 13.2 on 94 octane. Richening up to 12.2 or 12.5 doesn't seem to gain anything further. If you are using 91 octane, then maybe you will need to go a bit richer than 13. I can't verify that as I use 93/94 exclusively.

07-02-2007, 06:35 PM	#32
DandyMax 3.5 in the works 98 Maxima SE Join Date: Jun 2004 Location: Ontario, Canada iTrader: (7) Posts: 2,458	eng92 is correct in that timing is the key, and if you need to be richer to run higher timing then it's worth it to do so. Having said that however, it's my opinion based on my experience (and others like Jime) that VQ's (3.0 and 3.5) can get away with running optimal timing at a lean-ish AFR of 13.0 to 13.2 on 94 octane. Richening up to 12.2 or 12.5 doesn't seem to gain anything further. If you are using 91 octane, then maybe you will need to go a bit richer than 13. I can't verify that as I use 93/94 exclusively. __________________ 2000. 3L. 5-spd. Black on black. SE. (DD) 1998. 3L. 5-spd. Sterling Mist. SE. (fun car) 1/4 mile stats (all N/A VQ30): Best 60': 1.73 Best ET & trap: 12.61, 108.98 mph Click to see the video. More videos also here. Mods list and dyno here (as of May 9/08). My EU writeup can be found at VQ Power.