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SVTPerformance's Chain of Restaurants
The Distillery
gasoline to e85 DIY tuning, and a few other tuning Q's.
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<blockquote data-quote="harvboi05" data-source="post: 10269115" data-attributes="member: 88199"><p>first off, i just want to say i think its great to have a the new tuning section here on svtp. im considering converting to E85 in my vehicle and wanted to get a thread going for the DIY tuners here. im using PRP, and tuned my car to what i would consider acceptable standards on pump fuel. </p><p></p><p>my question is this, for swapping to ethanol, would i only change the stoich air/fuel ratio, and then continue with fine tuning the MAF transfer function? also, as far as ignition advance, its typically 4-8* of advance added from what i found. anyone have any experience with this? obviously id fine tune that on a dyno as well. just trying to get an idea of what to expect incase i actually follow thru with the swap, and just want to get some good info/dialog out there for people to search.</p><p></p><p>on a somewhat related note of closed-loop targets, im running E10 now, stoich is 14.1 for this fuel. so thats what im running for a target air/fuel ratio. i was considering leaning the target out to 15 for improved mpgs and etc. does anyone have any furious objections to doing so? ha.</p><p></p><p>I also need to rescale my load axis for my ignition values, for when i swap pulleys. what are people running for load values in their max allowed tables? i was going to scale mine the same as an 03/04 table upto 1.9 and then interpolate my current, dyno tuned ign values, but just wanted to throw it out there and see what people are up to. my top two load rows are 1.25 and then 1.6, which is certainly less than ideal; i need more resolution. especially because im already logging load values upto ~1.2.</p><p></p><p>thanks in advance guys.</p></blockquote><p></p>
[QUOTE="harvboi05, post: 10269115, member: 88199"] first off, i just want to say i think its great to have a the new tuning section here on svtp. im considering converting to E85 in my vehicle and wanted to get a thread going for the DIY tuners here. im using PRP, and tuned my car to what i would consider acceptable standards on pump fuel. my question is this, for swapping to ethanol, would i only change the stoich air/fuel ratio, and then continue with fine tuning the MAF transfer function? also, as far as ignition advance, its typically 4-8* of advance added from what i found. anyone have any experience with this? obviously id fine tune that on a dyno as well. just trying to get an idea of what to expect incase i actually follow thru with the swap, and just want to get some good info/dialog out there for people to search. on a somewhat related note of closed-loop targets, im running E10 now, stoich is 14.1 for this fuel. so thats what im running for a target air/fuel ratio. i was considering leaning the target out to 15 for improved mpgs and etc. does anyone have any furious objections to doing so? ha. I also need to rescale my load axis for my ignition values, for when i swap pulleys. what are people running for load values in their max allowed tables? i was going to scale mine the same as an 03/04 table upto 1.9 and then interpolate my current, dyno tuned ign values, but just wanted to throw it out there and see what people are up to. my top two load rows are 1.25 and then 1.6, which is certainly less than ideal; i need more resolution. especially because im already logging load values upto ~1.2. thanks in advance guys. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
gasoline to e85 DIY tuning, and a few other tuning Q's.
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