Flex Fuel related Q
Flex Fuel related Q alright, so we all know about the flex fuel GM suvs with the 5.3s. what i want to know is how the computer deals with the varatable imput of fuel it needs to put into the motor. it dosent need to put in as much gas as it would 85% alcohol..
reason im asking is that id like to be able to use E85 in my car whenever i wanted. id have to upgrade the injectors, but i wanted to know if a 00-01 computer could be tuned or if i would need to get upgraded hard/software.
i figure i could make a motor with over 12:1 compression and run it on pump premium to drive around town in, having the motor pull spark to not get predetination and then having it so i could put e85 in it whenever i wanted. i dont want to build a high compression motor and then be out driving it and run low of E85 when im miles away from a station.
reason im asking is that id like to be able to use E85 in my car whenever i wanted. id have to upgrade the injectors, but i wanted to know if a 00-01 computer could be tuned or if i would need to get upgraded hard/software.
i figure i could make a motor with over 12:1 compression and run it on pump premium to drive around town in, having the motor pull spark to not get predetination and then having it so i could put e85 in it whenever i wanted. i dont want to build a high compression motor and then be out driving it and run low of E85 when im miles away from a station.
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From: Dallas, North Mexico
Also, since E-85 is 105 octane, you can easily turbocharge that high compression engine.
E-85 = boost
pump = low boost/no boost.
at 11 or even 12:1 compression, you'll have plenty of compression to run just fine off boost.
E-85 = boost
pump = low boost/no boost.
at 11 or even 12:1 compression, you'll have plenty of compression to run just fine off boost.
i dont care about the details, thats for my tuner to worry about. i just want to know if it can be done and what i have to replace.
no i dont have to replace fuel lines etc to run E85, there is a thread on here about how you can use stock fuel lines with E85
no i dont have to replace fuel lines etc to run E85, there is a thread on here about how you can use stock fuel lines with E85
Originally Posted by Alvin
The biggest hurdle would be running the proper AFR's for the fuel mixture.
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Originally Posted by SSpeedracer
A lambda meter would get there for regular cruising, stiochiometric. What is the ideal AFR for Power? Probably rich right?
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Joined: Aug 2003
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From: Tranås, Sweden
Originally Posted by Cop Car
can the sensor be retrofitted, and then does a wire just need to be ran to the computer or do i need another computer?
Check on a Tahoe which pin it uses on the PCM for input. But the PCM might not be the same that the one you have. Dont know if it is possible to update your PCM with the right program. Maybe it is possible to use a Tahoe computer in an f-body.
Originally Posted by MadBill
The entire fuel system is upgraded for alcohol due to corrosion issues: Stainless steel tank and lines, different pump, different seals, etc. Standard vehicles are designed for a maximum of 10% ethanol.
And how long would you say it would take an F-Body to go to crap from running E85 through it daily?
He is past the 2 year mark so far.
There have been people running e-85 in their vehicles for years. However i dont believe that it has much benifit other than the higher octane. Its less efficient than regular gas so lower mpg's.
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Joined: Aug 2003
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From: Tranås, Sweden
Originally Posted by 97BlackLT1TA
There have been people running e-85 in their vehicles for years. However i dont believe that it has much benifit other than the higher octane. Its less efficient than regular gas so lower mpg's.
Theorethically, the gain is 5% just by switching fuel. 350 hp X 5% = 15 hp, plus what can be gained from timing.