Swapping Back to 93

[galaxy]

Yes, that's exactly what I was asking. I wasn't stating it was bad, I was asking how would it be (bad)? Sorry for the confusion.

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[SheepDog]

Yes, that's exactly what I was asking. I wasn't stating it was bad, I was asking how would it be (bad)? Sorry for the confusion.

Yeah, you're good to go with e20 in the tank, indefinitely if you want. The PCM can adjust fuel trims at this ethanol content, safely and without a tune.

 

[ModernSVO]

This is just a minor advantage, but take a gas can and pump a half gallon into that before filling up to get the 87 out of the hose.

I always done that, just so I have gas at home for mower, or snow blower, depending on season. But I don't think the quart or two of maybe 87 or 91 is going to change much in a 15 gallon load of fuel.

 

[galaxy]

This is just a minor advantage, but take a gas can and pump a half gallon into that before filling up to get the 87 out of the hose.

This is assuming the person in front of you didn't get 93 LOL ;)

 

[jcm3]

I reached out to PBD on this question, and their response (which makes perfect sense) is that when going back to 91, a few gallons of E85 left in the tank is not an issue.

Going the other way, obviously, is different.

 

[galaxy]

Swap is done. I drove down to a gauge indicated 2 miles left to empty. I did the file swap at the pump and filled up with 93. Thr start up and initial drive off was, uummm, less than smooth. Could certainly tell something was afoot. Not bad, just off. Within a mile or so, we were rockin and rollin.

 

[galaxy]

I want my e85 baaacckkk

Holy cow!

 

[chuckhammer]

I know the feeling, brother. Those extra degrees of timing BTDC make a significant difference.

 

[galaxy]

The other thing I’ve noticed is this. E85 removes that heat soaked feeling you get throttling along in traffic or in town on a 90° day. I just can’t believe how overall, all spectrums, the car ran on the gas I had. Looks like I just have to budget for a couple barrels of Sunoco from now on to get me through summer!

 

[Grimreaper]

Key for flashing back is to not do it at the pump. Bring down the tank to zero. Fill up on 93, then go driving for 5-10 miles. Then pull over and flash back to 93 tune. That will allow time for the E85 to make its way through the fuel systems, and the 93 to get to the injectors. Its not instant. So dont flash back until you have ran the car for a while on 93. And again a while means like 5 miles of driving.

This.

No point in flashing until the fuel trims show the 20-30% swing. Poor starts would be avoided everytime. I drive all the way home and load the tune there. Usually 10-15+ minutes of driving depending on lights. Drive it like a Camry and it won't matter. From e to 93 or 93 to e.

 

[jpjr501]

I go back / forth from 93 to E85. Actually yesterday went back to E85. My 93 tune is just for under 3000 rpm normal driving for like trips where there are no E85 stations. It stinks, no literally it stinks. E85 doesn't have that you're gonna die of carbon monoxide.

My car just runs overall better on E85 and I'm not talking performance. Just the idle, stays cool, just feels so smooth.

I also don't have access to E85 stations that are close. I have to travel or go get cans of it.

 

[galaxy]

My car just runs overall better on E85 and I'm not talking performance. Just the idle, stays cool, just feels so smooth.

This X 1,000! Spot on my experience and sentiment. Being back on 93 this past couple weeks sucks. It’s soo hard and unavailable to get, my ONLY e85 sessions so far has been on the 55 gal drum of Sunoco I picked up (to the tune of ~$8.50 a Gallon) expecting it to be a novelty and one time good deal. Now I’m not soo sure and seriously contemplating another drum for summer at least.

 

[JoeCee]

I want my e85 baaacckkk

Holy cow!

Does it make that much of a difference in the butt dyno?

 

[JTM88]

Does it make that much of a difference in the butt dyno?

Before going ESS I had an E85 N/A tune, and every time I switched back and forth it was a noticeable difference.

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