chsherma

Have anyone converted a C5 to run on E-85 Flex fuel?

dsmlights

yes it is not hard if you have hptuners or efilive.

chsherma

I have a hpturner i dont know what size injetors or fuel pump i need

chsherma

I have a hp turner I dont know what size injetor or fuel pump I need?

0chris@sfcc

there are literly TONS of posts on here about it and an even bigger (and more technical) thread over at the HPTuners board. I'd start there.

It's 100% doable and depending on what you've done to your motor you may or may not need to move injector sizes.

chsherma

I have a 427 with 12:1 compression they told me I could pick more hp with the E-85 fuel

0chris@sfcc

Well, that's possible. Are you yanking a bunch of timing and/or having detonation problems? Likely unless you have a strong desire to run e85 switching won't net huge gains but with 12:1 you should be able to get some for sure if it's tuned for 91 octane. Unless you understand what e85 lets you do (timing changes etc) you won't gain anything from just scaling your injectors to use it. I'd find a tuner who's had some experiance with e85 and have them do the tune, or tell your current tuner to re-optomize the tune with the understanding that e85 takes more fuel but can be tuned more like race gas due to it's higher octane.

your injector duty cycles will determine if you need more injector, figure 30% more fuel with e85 vs regular gas.

Also for clarification there are a few tuners who have got an actual 'flex fuel' style tune where you can run either e85 or regular, but most of the time you're locking yourself into e85 so make sure you understand that ahead of time.

Hope that helps.

chsherma

Im trying to get the most hp out of my engine I heard of people picking up all kinds hp just by changing there fuel

0chris@sfcc

"changing their fuel" isn't likely what's doing it, it's optimizing the tune for the fuel, running more timing, more boost or more compression without the negative side effects of low-octane street gas.

chsherma

Im running the ms-109 raceing fuel each time I go to the track the car speeds up I was told to go to methanol to pick more hp I talk to the guy that tune my car he said that the E-85 could basiclly do the same thing an be more easier to tune.

Milan

^ nice English

jobberone

Yep. And a lot cheaper, too.

0chris@sfcc

If you're using this for a racing application I would STRONGLY CAUTION you to remember that e85's ethanol content changes from winter to summer and so does the octane. Where are you located? I'd see if you can get an ethanol plant to sell you some 100% Ethanol and run that as race gas.

Do not put your tune on the ragged edge while tuning with summer blend e85 and then put winter blend e85 into it!!

Good luck in your pursuit for those last tenths- e85 is a very attractive race fuel alternative.