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Old 07-02-2008, 03:48 PM   #1
07tr
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Default E85 Maps

Anyone know if there are any e85 maps floating around to purchase? I've looked everywhere and cant seem to find any. I know pdx tuning is doing them for access port, but im just not ready fork out 5 to 6 hundred bucks for one yet.
Thanks for any help
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Old 07-02-2008, 11:49 PM   #2
lukeskywrx
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You can take a working gas map and given enough injector capacity just decrease the scalar by 25-30%, then tune to 12-12.5/1 gasoline afr, then give it a bit more timing. That will get you running just about right.
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Old 07-03-2008, 08:13 PM   #3
eminehart
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what injectors are you running.
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Old 07-03-2008, 09:23 PM   #4
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Quote:
You can take a working gas map and given enough injector capacity just decrease the scalar by 25-30%, then tune to 12-12.5/1 gasoline afr, then give it a bit more timing. That will get you running just about right.
That is a bit lean for a start up map at WOT, to be safe it would be better to shoot for WOT high load mixtures in the 11.0-11.5 gasoline AFR range, and start out with timing you would use on the same setup for Pump premium to 100 octane Sunoco GT1.

A first attempt map should always be on the safe side of both timing and fuel air mixture. You can push those boundaries after you can get it on a dyno or do some logging to verify you are getting the actual mixtures and timing you think you are.
Safe starting maps are much cheaper than just a little too far maps.

Larry
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Old 07-03-2008, 11:19 PM   #5
07tr
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right now im running the stock injectors, thanks for all the information. i think im gonna have to give it a try. are my stock injectors ok or will i have to replace them first?
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Old 07-03-2008, 11:40 PM   #6
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Originally Posted by 07tr View Post
right now im running the stock injectors, thanks for all the information. i think im gonna have to give it a try. are my stock injectors ok or will i have to replace them first?
They will not flow enough. Unless you just want to do it for gas price reasons. You would have to run at wastegate boost or youll max out the stockers in no time. Log you're Injector Duty Cycle if it goes above 55% then you will need bigger injectors. You will need a walbro fuel pump as well.
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Old 07-04-2008, 01:10 AM   #7
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You should contact Tim Bailey with Surgeline Tuning I was just talking to him today about e85. He said he tuned an STi last night using it and was hella impressed ( My words not his haha) I do a e85 mix tune but its not as common here as it is out in the nw
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Old 07-04-2008, 02:11 PM   #8
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Originally Posted by robbieshonda View Post
You should contact Tim Bailey with Surgeline Tuning I was just talking to him today about e85. He said he tuned an STi last night using it and was hella impressed ( My words not his haha) I do a e85 mix tune but its not as common here as it is out in the nw
E85 can get some serious performance advantages and it's cheaper than premium.
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Old 07-06-2008, 02:11 PM   #9
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Originally Posted by eminehart View Post
They will not flow enough. Unless you just want to do it for gas price reasons. You would have to run at wastegate boost or youll max out the stockers in no time. Log you're Injector Duty Cycle if it goes above 55% then you will need bigger injectors. You will need a walbro fuel pump as well.
The stock injectors on the 06+ WRX are fine for running E85 on the stock turbo. E85 flows around 30 percent more fuel then non-oxy fuel, where did you get that 55% number?
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Old 07-06-2008, 02:29 PM   #10
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Originally Posted by Bullwinkle1983 View Post
The stock injectors on the 06+ WRX are fine for running E85 on the stock turbo. E85 flows around 30 percent more fuel then non-oxy fuel, where did you get that 55% number?
sorry I have had an exhausting week. my math wasn't working. But the number is around 60% any higher and you run high IDC or you lean out the tune to the point that an off the shelf tune would not be safe only a custom tune could be the safest option. I just don't know what kind of IDC on a 06-07 WRX stage 2

Last edited by eminehart; 07-06-2008 at 02:49 PM.
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Old 07-06-2008, 11:24 PM   #11
robbieshonda
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Ive tuned a few cars on e85 but all were carbed. they made great power. You just have to drive 45 minutes to get it here... and I have a race gas dealer right across the street
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