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Approximate E85 BSFC
Posted: Sun Mar 23, 2008 12:37 pm
by enyawix
What would a approximate BSFC be for E85? I am in the home work faze of an E85 engine build.
Posted: Sun Mar 23, 2008 4:26 pm
by Minami Kotaro
My research indicates the rule of thumb is ~1.3 times the BSFC for gasoline.
For example, NA gasoline BSFC typically .4 - .5. For E85, .52 - .65.
Posted: Mon Mar 24, 2008 11:32 am
by AR 67202
on the other hand, you can run more advance on the spark, possibly giving more power... also you can run more compression improving the BSFC again...
Posted: Fri Mar 28, 2008 9:48 pm
by enyawix
So what size Injectors will I need for 590 at the crank compression will be 11:1. boost will be what ever I need for for engine dyno to read 590. Block is being balanced.
Posted: Sun Mar 30, 2008 2:10 pm
by S.Bretz
If you are trying to figure the injector size you will need, go to the megamanual and look at the ethanol page. There is calculator there.
Posted: Sun Mar 30, 2008 7:38 pm
by enyawix
S.Bretz wrote:If you are trying to figure the injector size you will need, go to the megamanual and look at the ethanol page. There is calculator there.
I used the calculator and got 65lbs sound correct?
Posted: Tue Apr 01, 2008 2:03 pm
by Minami Kotaro
I can't find an ethanol page. The only reference to ethanol is in a table of AFRs for different fuels.
Posted: Tue Apr 01, 2008 2:34 pm
by devastator
As I remember it, I calculated my injector size for a turbocharged engine on gasoline, then multiplied the required fuel times 1.4 for E85.