Running E85

JDM ego2033 · 2022-10-16T07:53:50-0400

I know this is kind of a controversial topic depending on who you ask but im curious on everyones thoughts on running E85 on our Groms. I have a 2022 and have been running E85 for a while now. I have a 160cc 8 hole injector, CJR bigger fuel line thats E85 compatible, aRacer Super2 with my own map (about 1 part richer across the board with some extra timing despite my high compression bbk) and with aRacer I obviously also run an AF2 wideband module. I monitor my temps and afr with a Sport-D display. Im curious what everyone else that's running E85 also runs to support it as well as how they go about tuning it. Im considering getting a separate wideband specifically for E85 also

Adamconda · 2022-10-26T10:40:20-0400

dyno it , see what kind of numbers you get .... go to riders bolk

JDM ego2033 · 2022-10-26T12:56:07-0400

Unfortunately I don’t live anywhere near them 😫 I actually don’t even know if any motorcycle dyno’s near me. I know there has to be something near me I just have to find one

Grom31 · 2022-10-26T22:35:21-0400

JDM ego2033 said:
Unfortunately I don’t live anywhere near them 😫 I actually don’t even know if any motorcycle dyno’s near me. I know there has to be something near me I just have to find one

Where are you at?

JDM ego2033 · 2022-10-27T03:31:29-0400

Grom31 said:
Where are you at?

New York maybe an hour away from NYC

Grom31 · 2022-10-31T00:33:15-0400

JDM ego2033 said:
New York maybe an hour away from NYC

The motorcycle shops in your area should have dynos. It is a fairly standard piece of shop equipment in the U.S. these days.

rmoreaux1 · 2022-11-21T08:54:21-0500

JDM ego2033 said:
I know this is kind of a controversial topic depending on who you ask but im curious on everyones thoughts on running E85 on our Groms. I have a 2022 and have been running E85 for a while now. I have a 160cc 8 hole injector, CJR bigger fuel line thats E85 compatible, aRacer Super2 with my own map (about 1 part richer across the board with some extra timing despite my high compression bbk) and with aRacer I obviously also run an AF2 wideband module. I monitor my temps and afr with a Sport-D display. Im curious what everyone else that's running E85 also runs to support it as well as how they go about tuning it. Im considering getting a separate wideband specifically for E85 also

Any time you run E85 you only experience gains if you add timing, do not worry about your compression ratio because E85 does not care, it is very resistant to knock. There are certainly a lot of dynos around your area and you do not need to limit yourself to a motorcycle shop with a dyno as many "car" dynos can run motorcycles. I have tuned several bikes on a Dyno Dynamics "car" dyno and they are a far better brand for accurate readings and consistent readings that a dyno jet which every motorcycle dyno I have ever seen was. If you do not add timing when using E85 you are not making any extra power and are actually losing power. Any time you increase octane rating without needing it, you lose power. I tune high hp engines all the way down the low Grom engines. I have about 350 dyno runs and testing on just the Groms.

JDM ego2033 · 2022-12-25T06:15:00-0500

rmoreaux1 said:
Any time you run E85 you only experience gains if you add timing, do not worry about your compression ratio because E85 does not care, it is very resistant to knock. There are certainly a lot of dynos around your area and you do not need to limit yourself to a motorcycle shop with a dyno as many "car" dynos can run motorcycles. I have tuned several bikes on a Dyno Dynamics "car" dyno and they are a far better brand for accurate readings and consistent readings that a dyno jet which every motorcycle dyno I have ever seen was. If you do not add timing when using E85 you are not making any extra power and are actually losing power. Any time you increase octane rating without needing it, you lose power. I tune high hp engines all the way down the low Grom engines. I have about 350 dyno runs and testing on just the Groms.

oh im with you on that completely, i run the dhm 149 bbk with a high comp piston and have my ignition timing set to 0 (directions state to run 93 with -6 timing across the board) granted I can probably add a bit more timing than to just leave it at 0 but i would like a dyno and knock sensors to determine where i start getting knock and to tune it more accurately. 0 across the board has made a noticable difference still though

Running E85

Top Contributors this Month