I had a pull over 53% IDC at 2200 psi last night with some inj window misfire popping. I'm at full E85 and cut the DAL's back to 23 lbs. boost but no improvement. No CEL's for low fuel rail pressure but I think I hit the fueling wall again.

Interested to see your results soon Nick!

Here you can see the STFT's start to climb as the fuel can't keep up with demand...

 

So I don't know tons about this and I know the point of this thread is 100% e85 ... However over the last few months it seems as though e50 to e85 won't really yield that much more power if any... Also running e50 doesn't encounter all the fueling issues since it's a higher percentage of gas... So shouldn't we be happy we can make basically the same power with no issues? It seems with e50 (47) everything runs great... Obviously if vince can make e85 work with no issues that's awesome and he's doing great work but I don't think anyone should be disappointed if we can't get e85 Because it seems e50 can give us the same benefits...

 

A lot of people don't like the split fill up issue, so if we can get the same performance from E85 and open up the E10 93 fueling for the big turbo guys then it's all good.

I figure I'll be going back to E60 (2:1) if Vince has nothing else up his sleeve (until I find a larger HPFP) but I am happy to help with the improvement process along the way.

 

I dont mind the dual fillup. If this will still work on the E blend without having to skew the MAF then Im still very interested in it.

 

The fuel mass would need to be tweaked depending on the blend you choose to keep the MAF freq table in line.

 

I understand what you are saying, but, I'm just trying to show both sides of the picture, and I doubt anyone here with daily driver type cars can say they spend 0% of the time below 4k rpm, not to mention the benefits to fuel economy higher compression would yield.

 

think you missed my point.

 

So the 93/e85 blend will make close to the same power as fill e85?

 

Of course those things are true, but that wasn't the topic. Yes, for best fuel economy, the LNF should have 12:1 compression and run less than 6psi boost. Driveability would be better as well. However, I'm not sure how that changes what I said- "In the case of a larger turbo where there is a lot more boost/airflow to be had without maxing the turbo, then less compression and more boost will result in more hp." The only statement that I made was that it would make more power. Off boost response, fuel economy, idle quality, and other characteristics could all decrease, but it still wouldn't make my statement false.

 

There are gains to be had by going past 50% E. There is a curve, however, and the majority of the gains are in by that point. For example, you might pick up 25whp by switching from 93 to E50, but only 5whp more by going all the way to E85.

 

my theory is "the closer your car is to stock.... the better the full E85 tune will work"

I still have no issues, and I have been flogging on my car

 

the exhaust valve corrosion thing has got me concerned a bit,, otherwise this is great

 

just ordered mine today. cant wait to receive it.. now i have to go waste the 5/8 tank of gas i have left!! LOL

 

I guess the question is which way would he the safest yet still get great gains in the long run

 

Well, I'm not talking only 6 PSI, I'm talking 20 PSI versus 30+ PSI that so many people want to run that is not generally very reliable long-term in the first place.

There is a lot bigger difference between 12:1 + 6 PSI Than you'd see between 10.5:1 + 20 PSI and 9.2:1 + 35 PSI.

PS- Matt, I've never said your thoughts for Maximum Power were wrong in anyway, I'm just trying to keep people's eyes open to the fact that dynamic compression can be balanced between static compression and boost, and results for 91 Octane Gasoline are not going to be reflected the same with E85.

The fact that only 30 horsepower is being picked up with the switch, is itself, a big reminder of how poorly the engine in its current configeration is tuned for alcohol fuels.

 

File coming my way

 

Mine also

 

even if were not able to run 100% e85 would this layer file help us guys that are running bigger turbos even if we stay with the 50/50 mix?

 

this is also my question

 

Bigger turbo on 50/50 should be good. Bigger turbo on full E probably not since the stock turbo guys that are testing this on full E are still running into intermitten fueling issues. We have to remember that Vince is still ironing out the kinks and trying to find a balance between fuel PSI and injection window

 

thats what i plan to do i just would like this new layer file i like the longer injection window with psi set at 2200 better than running stock injection window at 2800 psi less strain on the pump

 

Yeah, it basically evens itself out. Stock turbo=Full E. Bigger turbo=50/50. But this is still new and all that may change, or someone may find a way to tune a bigger turbo on full E in such a way that it doesnt pop a CEL.

 

ya run ZZP's dual fuel rail

 

LOL without having to do THAT.

 

Yea! We need more input! I sent Vince an EZFlash log of a pull today that had some issues.

Yea again!!!