haha!! exactly! i dont htink i could ever learn to fully tune my car. And the guys who know how to do it i give mad props too. lol!

 

yea for real real! I would love to learn more about it but damn who has time mad props to matt, iam broke, byt, term, and many others

 

there is an external program you can use for logging with the tactrix cable. I also can log the TF tune myself with HPT.

 

I asked you to order the cable so you can load updates yourself, and also load your 91 OCT TF tune when you don't have E85 around. Its so you always can revert back when you need to. The E85 tune is either E85 or E85

 

There are a group of students at a university doing this, mostly inline with the findings from the Delphi paper on E85 and to study economy. I think they are running something like 12:1 or something like that.

 

ahhhhh!!! lmfao! gotcha now! lol! yeah that would be great to be able to do! lol!

 

Lmao! This guy....

 

This guy with out coilovers!! lmfao!! jk man!!

 

/threadjack

 

yeah I use it for logging any canbus J2534 vehicle in either scanXL or sometimes ECUflash if I'm tinkering with a DSM

 

More Peak horsepower, of course. Average Horsepower under the curve might not read so clean cut.

I read the whole paper. It's one of the most interesting ones I've read in a while. They Ran E50 up to 12.5:1 on a NA motor with absolutely maxed out ignition and cam timing, IIRC. The paper focused a lot on the fact that E50 gets you most of the benefits of E85 as far as knock resistance, but also gets you better power density from its higher gasoline percentage. I'd like to see one with a 50/50 mix of ethanol and butonal.

Regardless, if you're looking for driveability, and not just peak horsepower, raising the LNF's compression seems to me to be the next step. I'm still confused about the fact that GM thought it was ok to run 9.5:1 compression on a supercharged, port injection engine, but dropped down to 9.2:1 on a direct injection, turbocharged car. There is no reason those numbers shouldn't have been reversed. At first I thought that GM was having a problem tuning to higher compression, or that the piston design was preventing them from raising it, but they are running 11.4:1 on the LAF with no issue. And considering both engines are designed for the "cat-****" that passes as 91 octane gaoline here in the states, it only seems reasonable both could do even better with a better blend of fuel.

PS- Mazda's new Sky engine runs 14:1 compression in Europe & Japan, but our fuel here is so bad, they are dropping it to 12:1 to run off it here in the States.

 

I would have to disagree.

 

I agree with your disagreement

Case being K20 + 8PSI is more powerful than an LNF or LSJ + 8 PSI on the same turbo.

Built high comp K20 + 20 PSI > Built low comp LNF or LSJ or low compression K20 on the same turbo with same PSI level.

its all limited by the strength of the internals.

powerband is also better on a high comp low boost engine

 

If we were talking strictly on pump gas, your numbers work in your favor.

If we are comparing high boost and low boost engines with the same turbo, we are not tuning to the strengths of each build.

But, I'd like to see a good comparison of 2k-4k rpms betweent these builds when E85 or E50 was the fuel. I have no doubt that above 4-5k the higher boost engines make more power, I'm simply doubting the low to midrange.

Those numbers prove my case, not his... ?

 

What kind of gains are expected from running e85 compared to just 93 octane

 

looks like about a 30WHP increase

 

Not bad at all just for switching fuels. Does everyone seem to be having good luck with this so far? I'm thinking about doing this myself here in the next few weeks

 

I am so far. ive already killed a 1/4 of a tank with no issues

 

So you must not have driven very much


I keed.

 

I did do a spirited pull to over 160 on a closed course on a mexican airstrip

 

will be getting a e85 file from ya soon vince i want that extra bump everyonce in a while being that theres no freggin e85 around me :/

 

Wow awesome work Vince. I just read every last word of this thread lol. I'm hoping some big turbo guys step in to test the earlier injection start on E10. I feel much better about starting the injection earlier than running 2800+PSI fuel pressure.

 

Still waiting for the 09 file to try out. Im actually heading to the pump today to fill back up, so it would be a perfect time to try the layer out Ill be easily able to goto full E85 today.

 

Im getting my file in a couple days. Right now Im running the gas out of my car.

 

Of course the off-boost performance is better with high compression. There is a sacrifice that has to be made when dropping compression to add a lot more boost. Fortunately, I spend 0% of the time at 2k-4k rpms when I am racing.