Adam Here since the start... Lifetime Members 10,282 Member For: 21y 7m 2d Gender: Male Location: Victoria Posted 03/02/13 08:34 AM Share Posted 03/02/13 08:34 AM No one here can tell you if it's safe or unsafe. Peak power is generally considered to be around 12.5, but with all things there's variation. It's not as simple as lean = unsafe and rich = safe.If you're lucky Ratter or one of the other guys with tuning knowledge will pop in and be able to explain it better. Link to comment Share on other sites More sharing options...
qik1 Silver Donating Members 2,720 Member For: 16y 6m 17d Gender: Male Location: Loitering in SEQ Posted 03/02/13 08:35 AM Share Posted 03/02/13 08:35 AM I'm pretty sure my car ran 11.5 afrs on e85, which I thought was quite low.that's erring on the very safe side especially on e85, can afford to lean on it a little harder, definatly see more power on e85 when leaned out a touch compared to what you'd see on 98. 12.5 is a pretty happy place & before you say it JET yes its done in lambda but you can convert that for them if you like Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 5m 28d Gender: Male Location: Adelaide Posted 03/02/13 08:41 AM Share Posted 03/02/13 08:41 AM 1 Link to comment Share on other sites More sharing options...
djqc Member 291 Member For: 13y 1m 19d Posted 03/02/13 08:45 AM Author Share Posted 03/02/13 08:45 AM Is there a huge difference between 12.5 and 12.8? Is that the difference between the car popping or not? Link to comment Share on other sites More sharing options...
xr6t_ute Donating Members 2,281 Member For: 17y 5m 3d Gender: Male Location: south east suburbs Posted 03/02/13 08:51 AM Share Posted 03/02/13 08:51 AM I do not understand why they would push the car that hard, you have all the supporting mods, why not have some safety in the tune , you will lose around 10 rwkw, but it will help your motor in the long run. Link to comment Share on other sites More sharing options...
qik1 Silver Donating Members 2,720 Member For: 16y 6m 17d Gender: Male Location: Loitering in SEQ Posted 03/02/13 09:00 AM Share Posted 03/02/13 09:00 AM are ya sure ya heard them right, got a dyno chart with afr's on it, that's a pretty amatuer misktake to do that intentionally??? Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 1d Gender: Male Location: @ my laptop Posted 03/02/13 09:18 AM Share Posted 03/02/13 09:18 AM Adam is correct, a car can be run at 13.5:1or leaner if the spark table is set up for it, although combustion temps, (not coolant temp) will get higher with a lean mixture.To those quoting AFR's on other fuel bseide unleaded, are you sure the dyno was set up to read the other fuels stoich value???? bet you don't know for sure, if you talk lambda we know things are reading correctly 3 Link to comment Share on other sites More sharing options...
f6mark Member 2,908 Member For: 13y 9m 14d Gender: Male Posted 03/02/13 09:20 AM Share Posted 03/02/13 09:20 AM 12.0 AFR safe mate. I like mine about 11.8 on pump fuel. who tune the car mate.?? Link to comment Share on other sites More sharing options...
F6Fury Member 135 Member For: 12y 3d Posted 03/02/13 10:14 AM Share Posted 03/02/13 10:14 AM 11.5-11.9 is good for pump, 12-12.5 can be ok depending on how much timing you have 1 Link to comment Share on other sites More sharing options...
Mr_4.0 Member 1,096 Member For: 13y 10m 9d Posted 03/02/13 10:46 AM Share Posted 03/02/13 10:46 AM Exactly ratter!! So many people forget this still!! 3 Link to comment Share on other sites More sharing options...
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