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Anyone have a fuel map to run E85 on a XB9R?

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burton9010

Member
Joined
Mar 15, 2011
Messages
14
I have seen a few people around here have done it. I have ECMSPY and the cable but I do not know the program well enough yet to be able to make a fuel map for E85. Does anyone have a map already made up they can send me?
 
You would lose fuel economy fyi. So what you save at the pump would just be lost in mpg. If thats what youre looking for.
 
I understand you loose fuel econonmy if you run it as is. It also burns a lot cooler to keep your engine temps down and burns a lot cleaner. You can also go more aggressive on your timing curve to gain more power.
 
anyone? If I knew of a dyno shop in the sacramento area that could tune buells I would just take it to them.
 
There's a shop up here (Redding) that can do dyno tunes. I know they owner pretty well. His son races Jr Dragsters and he has a nitro harley.
 
An easier way might be to bump the fuel pressure up, a lot of after market turbo kits do that to squeeze more flow out of stock injectors. I just got a ECM Spy cable, I might have to try this out. I've got a lot of experience with efi tuning on cars.
 
If I knew what everything in ecmspy did I would mess around with it myself. I am looking to just get it to run on E85 for now and not worried about max dyno power tuning. E85 has a stoch of 9.7/1 and seems to run best right around 35%-38% more fuel flow then regular gas. If anyone is pretty good with ecmspy and knows how to do this everywhere on the fuel curve that would work too.
 
All you would have to do is load your current map with Ecmspy and save it. Then multiply each cell in the map by like 1.37 and then save that map down to the ecu again. I haven't loaded up ecmspy yet but I plan on messing with it soon. Biggest thing would be to watch the injector duty cycle at WOT in the higher rpms to make sure they are not open more than 80% or so. If I get to it ill post my maps or a howto video. It's still April so it is too rainy to ride here in Detroit.
 
i have thought about doing this with my s3 tuber, i use the ecmspy and could figure it out but e85 is not at many stations in the south east. as for a good shop in cali jim higgens has a shop at infineon raceway area. he races at bonneville, smart guy with ecmspy and buells.
 
@etx - that's a pretty ingenious way of adjusting the fuel map...what would the O2 sensor see when running e85 though? Would it try to adjust the values again to possibly compensate?
 
my XB9R doesnt have O2 sensors so it would be good. What do the numbers on the fuel maps represent? If I just multiply them by 1.3 or 1.35 it will be flowing 35% more fuel?
 
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