What Air/Fuel Ratio for Supercharged LT1
#1
What Air/Fuel Ratio for Supercharged LT1
Ive got a 6psi Powerdyne and i recently dynoed 359 rwhp and held 11.4-11.5:1 until 5k where it tapered to 12.5:1 at 5500rpm. What is the ideal air to fuel ratio and how much extra power do you think i can pick up.
#4
Re: What Air/Fuel Ratio for Supercharged LT1
well the reason i ask is that i thought you made more power as well as it being better for the engine to be somewhat leaner around 12.5:1
the car doesnt get that great of gas mileage, probably around 17 avg and the exhaust tips are black from unburnt fuel.
the car doesnt get that great of gas mileage, probably around 17 avg and the exhaust tips are black from unburnt fuel.
#5
Re: What Air/Fuel Ratio for Supercharged LT1
12.5:1 might make slightly more power, but it doesn't give you much room for error. I've heard of some of the Mustang guys making the best power leaner than that, but unless you dyno, you don't really know for sure, and even then, it can be off by a bit. You're not in boost most of the time anyway, so if your mileage is sucky, look at the O2 sensors and see if they are doing their job.
#6
Re: What Air/Fuel Ratio for Supercharged LT1
Originally Posted by Kevin Blown 95 TA
12.5:1 might make slightly more power, but it doesn't give you much room for error. I've heard of some of the Mustang guys making the best power leaner than that, but unless you dyno, you don't really know for sure, and even then, it can be off by a bit. You're not in boost most of the time anyway, so if your mileage is sucky, look at the O2 sensors and see if they are doing their job.
#7
Re: What Air/Fuel Ratio for Supercharged LT1
Most of 'em like ~12.3-12.5:1 and that is safe. However, you need to be careful about your tuning conditions relative to your driving conditions. If you test in bad air and it's in the range I suggest, it will be too lean in good air. Also, a hot engine is going to need a richer mixture to help keep the heatr down.
Rich
Rich
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