Anyone ran E98?
#21
for the record, I've ACTUALLY tried this with Toms FFTHUPERCHARGER. cause when I call someone a moron, and their whole forced induction method moronic, I like to speak from experience.
200-220F at cruise, 250-280F at 8psi of boost, on e85, and car made absolutely no friggen power cause it was ingesting lava
200-220F at cruise, 250-280F at 8psi of boost, on e85, and car made absolutely no friggen power cause it was ingesting lava
Good look. This is what I needed to hear.
#31
i.e. if we tune for E85 then blend the maps back for lower E content. So the tune isn't more aggressive at E85 vs E70? Or that an aggressive E70 tune reaches MBT and therefore there's nothing more to gain up to E85?
#33
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Is there any real data on the relationship between ethanol content and knock prevention/timing advance.
I have heard 3rd hand that the guys at English Racing tune flex fuel very conservative. I.E. as soon as you don't have a certain amount of ethanol (E70? E80?) they dump a bunch of timing out. But I hate information like that, impossible to trust.
I assume you can tune the fuel mix quite linearly because you are just trying to hit ideal AFR's, but I don't know if timing follows the same curve.
I have heard 3rd hand that the guys at English Racing tune flex fuel very conservative. I.E. as soon as you don't have a certain amount of ethanol (E70? E80?) they dump a bunch of timing out. But I hate information like that, impossible to trust.
I assume you can tune the fuel mix quite linearly because you are just trying to hit ideal AFR's, but I don't know if timing follows the same curve.
#34
I don't really think there can be a "universal chart" like that.
There is e85, then there is e85, hundreds of pumps with varying content and purity and quality, and the bottom line is it's way better to be conservative and do what ER does than to risk it with a more linear transition.
But that's all subjective opinion.
There is e85, then there is e85, hundreds of pumps with varying content and purity and quality, and the bottom line is it's way better to be conservative and do what ER does than to risk it with a more linear transition.
But that's all subjective opinion.
#37
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The only place around that we have e85 is called Jay's garage. And they cater to the "enthusiast". I'd be willing to be that it is someone constant, they seem like the kind of place that would pride themselves in that and advertise it.
#39
From what I've read vlad hit a good point with the part about needing gasoline. It lubes stuff in ways that alcohol doesnt. (there is a dirty joke in there somewhere)
You have to go to extreme limits to get e85 to knock.
Jays garage is like $3.00 a gallon for e85. Show up with a 55 gallon drum and spend half the price.
You have to go to extreme limits to get e85 to knock.
Jays garage is like $3.00 a gallon for e85. Show up with a 55 gallon drum and spend half the price.
#40
this could be a good compromise. If e30ish is where you cap out on timing then it would make sense to keep it at those levels. If I have the science right the fuel map would need less compensation and the injectors would be taxed less. Also slightly better gas mileage. The major inconvenience would be the mixing but if you were to get a drum of e98 and keep a few gallons in a separate jug in the trunk you could just get whatever gallons of e10 plus 2 gallons of e98 equal 30 and just verify you are close by monitoring your sensor. I'm sure there is a tolerance of a few points.
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