E85 experts

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  • Outlaw86'd
    bite it you scum
    • Aug 2007
    • 3301
    #1

    E85 experts

    i had a conversation with my tuner last night about the evo sporty i am building right now and he suggested that running corn might get a few more hp/tq out of my setup. is this true even without having high compression/boost? the motor is 10:1 with flat top pistons, .490/.500 cams revs to 6.5k before power starts to fall off. it did have intermittent ping issues before, but i think that was because i was running champion plugs

    where do i start with jetting/ect to run ethanol and is it even worth it?
    Tags: None
  • TitaniumGT
    www.twolaneracing.com
    • Feb 2003
    • 11042
    #2
    You can run more timing with E85.. so there might be a little more power there.. I know its not that easy to find E85 always.. especially when you get out of the city. My roomate kinda has to plan his trips to make sure he can get to an E85 station since his car doesn't have a lot of range. just something to think about.. might not really be an issue for you.
    1993 Titanium Cobra (1 of never)
    AFR 165s, Cobra intake, FTI cam. NX N20
    Best ET 11.2 @ 123 on the 100 shot.
    446RWHP and 585RWT
    1998 Atlantic Blue Cobra convertible(1 of 1 built)
    Vortech S-trim
    346rwhp and 314rwtrq

    Comment

    • my1stang
      TCS Homer
      • Aug 2006
      • 803
      #3
      DB was able to get another 25hp/15tq out of my blown 2v on E85. I also had him tune on premium so that I could switch between the two tunes if I ever ran out of fuel with no E85 stations around.

      Comment

      • Outlaw86'd
        bite it you scum
        • Aug 2007
        • 3301
        #4
        Originally posted by TitaniumGT View Post
        You can run more timing with E85.. so there might be a little more power there.. I know its not that easy to find E85 always.. especially when you get out of the city. My roomate kinda has to plan his trips to make sure he can get to an E85 station since his car doesn't have a lot of range. just something to think about.. might not really be an issue for you.
        this bike isn't built for long trips

        does anyone know how to figure out how much i need to step up my jets?

        Comment

        • five0@minot.com
          TCS Homer
          • Feb 2008
          • 492
          #5
          Originally posted by 89DDgt View Post
          this bike isn't built for long trips

          does anyone know how to figure out how much i need to step up my jets?
          Roughly 30%.
          89 LX Hatch, DART 363,C4, 88mm turbo,ms3 Pro
          86 GT
          86 LX
          82 Capri RS
          72 Demon 340 4-speed
          72 Duster 340 4-speed
          73 Dart Sport 340, 410ci bracket racer.

          Comment

          • Outlaw86'd
            bite it you scum
            • Aug 2007
            • 3301
            #6
            Originally posted by five0@minot.com View Post
            Roughly 30%.
            and what about plugs? can i run the same OEM NGK's. do i need a hotter or colder spark for more timing?

            Comment

            • Guest's Avatar
              #7
              hotter

              Comment

              • theduckylittle
                Duck uber Alles
                • Jan 2003
                • 5435
                #8
                10:1 with flat-tops will probably not see a big advantage in E85. You'll see some, but I can't imagine a lot. Ethanol is nice because it brings its own oxygen to the party. More oxygen = more power.

                I've sorta moved away from E85, the mixes at the gas station just get too random for my setup. Either I get shitty idling or I get terrible top-end. Changes from tank to tank and without the proper oxygen sensor to adjust the fuel and timing appropriately it gets to be a pain.

                Of course, the Hi Tech guys have claimed to build some pretty drivable cars on the stuff without the dynamic tuning. They may know a secret handshake that I do not.
                1992 Mazda MX3: L3 100 BigYmp.

                Comment

                • LS2GTO
                  I'm an addict
                  • Jun 2007
                  • 378
                  #9
                  I love the E85, price is nice too. Car needs 28% more fuel at wide open throttle. Needed to upgrade fuel system for my N2O setup, larger injectors, larger fuel pump, and a KB boost-a-pump. I picked up 38rwhp on the change over, was able to advance 9 degrees of timing over 92 octane tune, stock LS2 10.8:1 compression, 606rwhp on spray and corn!
                  Originally posted by orange88
                  sounds like a whole lotta bench racing to me, and i know bench racing.

                  Comment

                  • Macs Stang
                    Dale Jr.
                    • Dec 2002
                    • 18269
                    #10
                    The only thing I hate about corn is the first initial start up when the car has sat for a while. Runs like poop. When the fuel is cold you'll know it as the car will feel like it isn't running correctly.
                    O.C.R.

                    I make horse powerz

                    Comment

                    • 68GTO
                      The Coach Z
                      • Sep 2003
                      • 15772
                      #11
                      The engine will need 30% more fuel ALWAYS as it contains 30% less energy per unit.
                      There is NO way to get around this. If you build an engine to take advantage of the resistance to detonation inherent in E85, then you can extract more power. E85 tolerates more compression/boost/timing...

                      Much worse mileage...
                      Captain Obvious reporting for duty.
                      • Bullet point mafia
                      There = a place
                      Their = belonging to someone, possessive
                      They're = contraction of they + are

                      Comment

                      • 1BADRZ28
                        X235
                        • Oct 2003
                        • 5189
                        #12
                        Originally posted by 68GTO View Post
                        The engine will need 30% more fuel ALWAYS as it contains 30% less energy per unit.
                        There is NO way to get around this. If you build an engine to take advantage of the resistance to detonation inherent in E85, then you can extract more power. E85 tolerates more compression/boost/timing...

                        Much worse mileage...
                        Tell me why my Tahoe gets 1 mpg less on e85? Instead of 18 I get 17.

                        Comment

                        • 289Notch
                          Lowballer
                          • Oct 2006
                          • 7340
                          #13
                          Originally posted by 68GTO View Post
                          The engine will need 30% more fuel ALWAYS as it contains 30% less energy per unit.
                          There is NO way to get around this. If you build an engine to take advantage of the resistance to detonation inherent in E85, then you can extract more power. E85 tolerates more compression/boost/timing...

                          Much worse mileage...
                          just to note, the (2) 30% mentioned above are not directly realated. The chemistry just happened to work out that way.
                          Mustangless!

                          Comment

                          • tim
                            TCS Homer
                            • Nov 2005
                            • 15463
                            #14
                            My roommate has a 2000 Night train that is built very well. He asked his harley mechanic, who has been porting heads and building all types of bikes for many many years, about this and he said that my friend Dave wouldnt gain much.

                            I would trust this guy with any type of motorcycle, he personally races a built Busa, and built big twin Harley all over the midwest. He is nationally known for his cylinder head porting services.

                            Give him a call, very nice guy and would be more than happy to answer your questions.

                            Ask for Dave
                            http://www.ijmimotorcycles.com/


                            This guy will probably be building my roommates 08 Street Glide over the winter and I am so tempted to buy his built Super Glide right now

                            Comment

                            • tim
                              TCS Homer
                              • Nov 2005
                              • 15463
                              #15
                              Originally posted by 68GTO View Post
                              The engine will need 30% more fuel ALWAYS as it contains 30% less energy per unit.
                              There is NO way to get around this. If you build an engine to take advantage of the resistance to detonation inherent in E85, then you can extract more power. E85 tolerates more compression/boost/timing...

                              Much worse mileage...
                              I know a lot of people that have flex fuel vehicles and they hardly notice a difference, maybe a mpg or two. Other people I have asked say they see more

                              Comment

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