[HPA Q&A] How much ignition advance should I use with E85 (ethanol) fuel?

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  1. High Performance Academy
  2. 31-07-17
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[HPA Q&A] How much ignition advance should I use with E85 (ethanol) fuel?

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Комментарии
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Why is this channel not more popular? It's really should be. Keep up the good work.

HellaNorCal
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Would it be generally safe tho?To add 2 degree to the whole map? If the low octane tune was considered “safe”

madvtecyo
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I have a turbocharged engine at 15°, gazoline SP98. So I must go to 13° with e85? I have unburn fuel that "pop" in exhaust manifold at low rpms. Thanks.

alundrasrt
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I've read and had discussion with engine professionals about the E85 ignition timing. While the ethanol fuel will indeed have a greater flame front velocity, the delay from spark to ignition is greater than that of gasoline. This seems to make the total combustion period longer and thus requiring more ingition advance throughout the map. You're saying that there are areas where you'd actually need to reduce timing. Where and in what conditions is this so?

gnaloin
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Nice vid! Question: If running on a Apexi Power FC Ignition map (that's based on E85) and regular Shell V-Power gasoline on a 1JZ-GT, is it correct to drop the whole ignition map by 2 degrees or so? Or is there another procedure I should follow? I do have some knock on the hand controller (about 43).
Ps. I'm just an amateur and we don't have a DYNO in my country... Thanks in advance!

ShifarAbdoelaziz
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Great information. Im actually in the process of tuning 2 cars on pump fuel and we are on the verge of doing Ethanol maps on both. This will really help a lot. Is it correct by saying that we need the LEAST amount of advance where we make the most bhp?

kevinrheeder
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Can tractive force measured from the dyno give an indication as to when the engine is knocking? i.e. If the engine is knock limited can MBT still be obtained by advancing timing into the knock region or does detonation inherently have a significant reduction on BMEP?

albietbeck