E85 calibration for emissions testing

[rkreigh]

Originally Posted by Marc Haibeck

Hi Ron,

All that should be needed is to flow about twice as much fuel compared to E10. I think that the oxygen sensors would still switch at 14.7:1 so they would need to be shut off and run open loop.

I would be concerned about the effect that the E85 would have on the fuel system hardware if exposed to it for over a week.

thanks Marc,

the plan would be to warm up the car, drain the gas, switch the memcal, , put a few gallons of e85 in it, run it through the test, , an then come home and immediately drain it out. so the exposure wouldn't be too long. a couple of hours tops.

an open loop calibration would be just fine.

I'll probably try some fresh cats (as I have them) to see how close I can come as you advised. but with the tough 48 HC standard, my bet is that it won't pass at idle.

this would be plan B. very interested in E85 though for a turbo ZR-1

yes, the entire fuel system would need to be upgraded, but the power possibilities are there. problem is the "hassle" associated with storing a car for any period with e85 it would have to be driven very frequently or drained when not in use.

thanks for any tips or advice

[XfireZ51]

Originally Posted by rkreigh

thanks Marc,

the plan would be to warm up the car, drain the gas, switch the memcal, , put a few gallons of e85 in it, run it through the test, , an then come home and immediately drain it out. so the exposure wouldn't be too long. a couple of hours tops.

an open loop calibration would be just fine.

I'll probably try some fresh cats (as I have them) to see how close I can come as you advised. but with the tough 48 HC standard, my bet is that it won't pass at idle.

this would be plan B. very interested in E85 though for a turbo ZR-1

yes, the entire fuel system would need to be upgraded, but the power possibilities are there. problem is the "hassle" associated with storing a car for any period with e85 it would have to be driven very frequently or drained when not in use.

thanks for any tips or advice

Even in O/L, wouldn't you need more than a couple of hours to get the tune right using a WB calibrated for E85?