Microtech A/F RATIO on boost
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Joined: Jan 2003
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From: new zealand
A/F RATIO on boost
i have a ltx8s runing a std s5 motor with a hybrid turbo and 850cc sec injectors
the car is making 240rwhp but is using a lot of gas even when off boost. when it was last on the dyno it got a a/f ratio of 10 which seens rich as hell to me
the car is making 240rwhp but is using a lot of gas even when off boost. when it was last on the dyno it got a a/f ratio of 10 which seens rich as hell to me
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Joined: Aug 2002
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From: Bay area
maybe a bit.
you're mostly just wasting gas, especially if it's that rich outside of boost. outside of boost in heavy load go for 12.5:1, outside of boost in light load like cruise conditions go leaner to save gas, 13's. Your 10:1's in boost @ WOT will waste gas but the extra gas can have an intercooling effect and actually make more power, it also helps prevent detonation. It's a bit excessive @ 10:1, really have to take the boost levels and your intake temps (after intercooler) into consideration to decide on a ideal safe AFR for boost.
you're mostly just wasting gas, especially if it's that rich outside of boost. outside of boost in heavy load go for 12.5:1, outside of boost in light load like cruise conditions go leaner to save gas, 13's. Your 10:1's in boost @ WOT will waste gas but the extra gas can have an intercooling effect and actually make more power, it also helps prevent detonation. It's a bit excessive @ 10:1, really have to take the boost levels and your intake temps (after intercooler) into consideration to decide on a ideal safe AFR for boost.
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