E85 Powered VR4?

[a2j]

right now I'm running 50/50 mix so far so good. on stock fuel system. just normal driving. if something will go wrong I'll let you guys know.

[91vr4n00maxima]

Originally Posted by a2j

right now I'm running 50/50 mix so far so good. on stock fuel system. just normal driving. if something will go wrong I'll let you guys know.

on stock injectors you will be out of fuel at about 8-9 psi with e85.

[a2j]

Originally Posted by 91vr4n00maxima

on stock injectors you will be out of fuel at about 8-9 psi with e85.

well, I never had fuel cut so far. but I'm not flooring it anyway cuz I need a new clutch.

[runner4053]

Originally Posted by kihtay

Just curious, did you have problems with the evo running/ starting in the winter when it got cold? I've been running my Eclipse on it for the past 4 months, but now it's getting cold and seems to hate life (issues with starting)
But yuh, the dummy answer is larger fuel pump and larger injectors. I went up from 650s to 750s for enough flow (single evo3 16g- dsm). It makes a huge difference with spooltime as well

This spools faster? I was always under the impression that e85 will lessen the power of a vehicle. I guess that only applies to NA cars though.

[leet]

Originally Posted by runner4053

This spools faster? I was always under the impression that e85 will lessen the power of a vehicle. I guess that only applies to NA cars though.

yeah E85 burns faster then normal petrol, so you gain a little torque too

the local DSM shop that was near me when I lived in oklahoma used E85 in a ton of DSM's, 240's, and a bunch of other cars

on big laggy turbos they said they usually got about 200rpm or more faster spool


E85 will only lessen the power of a vehicle if it isn't tuned properly to run it

[ver fer]

Originally Posted by leet

on big laggy turbos they said they usually got about 200rpm or more faster spool


E85 will only lessen the power of a vehicle if it isn't tuned properly to run it

The decrease in spool is likely caused by the increase in fuel consumption.
more fuel = more exhaust
You can get more power if the vehicle is tuned to run on only e-85. Think alky drag cars.

[runner4053]

I've also been under the impression that E85 is seldom 85% ethanol. I've heard the mixture varies from pump to pump. Stock flex fuel cars compensate for this with a fast refresh rate on the 02s and I've also "heard" that there's a sensor which detects the ethanol percent before the fuel even reaches the engine. Is any of this correct?

[lethal_vr4]

Yes there are ethonal % sensors... but I imagine it would be hard to integrate with our currently available piggy back fuel controllers.

[runner4053]

So, if you can't guarantee what mixture you have in the gas tank, and we can't use a ethanol percent sensor, how could we ever have a consistent tune?

edit: I'm just trying to see if this is viable on a street driven vehicle. I like to get in my car and go. If I'm low on fuel, I just want to pump and go. Testing for composition would be a huge inconvenience.

[leet]

Originally Posted by runner4053

So, if you can't guarantee what mixture you have in the gas tank, and we can't use a ethanol percent sensor, how could we ever have a consistent tune?

edit: I'm just trying to see if this is viable on a street driven vehicle. I like to get in my car and go. If I'm low on fuel, I just want to pump and go. Testing for composition would be a huge inconvenience.

85% in the summer and 70% in the winter

that's the only switch there is