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Old 10-30-2007, 08:16 PM   #11
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Differences on most (if not all) flex fuel engines:
  • Fuel Pump
    Fuel Tank
    Fuel Lines
    Fuel type sensor (you don't have it, to determine what fuel/mix of fuel is in your tank)
    Fuel injectors,
    Many GM Flexfuels have different cyl heads than the std gas models

This isn't even considering the computing differences necessary to adjust timing, and knock sensing/reduction for different fuels, the multitude of fuel maps, etc.

Any retrofit kit isn't a true retrofit. It might make a car last a while with E85 in it'* system, and might run ok, but it'* not gonna be reliable, or super long lasting.

As mentioned E85 has a lower MPG due to lower potential energy...
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Old 10-30-2007, 08:22 PM   #12
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Quote:
Originally Posted by BonneMeMN
Differences on most (if not all) flex fuel engines:

<snip>
There'* a few other things that we've found causing issues... best advice is to just avoid it if it wasn't built for it. A real biggie is the valve seat area (and valves, depending on specific program). Not sure how our iron heads will fare with E85 - they may be just fine, it may wreak havoc.
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Old 10-30-2007, 08:24 PM   #13
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I'd bet on the wreak havok. Since alcohol is corrosive I wouldn't run it anything not designed for it, thats for sure.
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Old 10-30-2007, 08:30 PM   #14
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Quote:
Originally Posted by mkaake
Quote:
Originally Posted by BonneMeMN
Differences on most (if not all) flex fuel engines:

<snip>
There'* a few other things that we've found causing issues... best advice is to just avoid it if it wasn't built for it. A real biggie is the valve seat area (and valves, depending on specific program). Not sure how our iron heads will fare with E85 - they may be just fine, it may wreak havoc.
I didn't wanna get too indepth on it, but yeah, there is more...

You wouldn't put diesel in a 3800, don't do E85...
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Old 10-30-2007, 08:43 PM   #15
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Quote:
Originally Posted by BonneMeMN
Quote:
Originally Posted by mkaake
Quote:
Originally Posted by BonneMeMN
Differences on most (if not all) flex fuel engines:

<snip>
There'* a few other things that we've found causing issues... best advice is to just avoid it if it wasn't built for it. A real biggie is the valve seat area (and valves, depending on specific program). Not sure how our iron heads will fare with E85 - they may be just fine, it may wreak havoc.
I didn't wanna get too indepth on it, but yeah, there is more...

You wouldn't put diesel in a 3800, don't do E85...
Alright thanks. All very helpful information.
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