Seems like 1000 cc/min injectors would not be sufficient for an ETS 58 mm with E85. What AFRs and IDCs are you logging? Anyhow, if AFRs are around 12:1 (gasoline calibration), then E85 pretty much doesn't knock, so just keep adding timing until the car doesn't make any more power. Then back it off one deg. At least that's what I'd do on the stock ECU that has very reliable knock detection. I'd be a little more leary of tuning an AEM EMS, but not too leary because as I said, E85 doesn't really knock at 12:1 AFR.

 

these are the dyno graphs which you can see the boost, A/F, hp, and tq....I basically took the car right to the dyno after I bought it to see what kind of "baseline" numbers I could get. I smoothed out the boost curve already which is now 29-30psi steady. MY inj. ducty cycles don't seem to be right either as per the EMS they are less than 40% max. I was told the tune that came with the car was for E85, but it's looking more and more like it's not. My A/F's are ok even with this crappy tune

 

My timing map is ridiculous on E85. Some of these E85 maps posted look pale in comparison to the timing digits I have.

-E

 

The "typical" peak timing I see goes something like this:

Stock turbo / FPgreen:

Evo 9 = 18-19*
Evo 8 = 22-23*

50trim / BBK / etc:

Evo 9 = 16-18*
Evo 8 = 18-20*

35R / FP3065 / etc:

Evo 9 = 14-15*
Evo 8 = 16-17*

Of course every Evo is different and keep in mind I am not listing boost pressure or mods.

here is another example showing average difference between 91 pump and E85 timing: (keep in mind boost pressure is almost always much higher on E85 as well)

 

That tune is a mess, and it makes me wonder if you bought someone else's disaster. I suspect that the injectors are very close to maxed out. According to my calcs, they should be right near 100% at peak HP. At any rate, the AFR is not going lean, so fuel is ok for now. Need to get that boost spike under control, lean out the AFR to 12:1, and assuming you can monitor knock, then start increasing timing.

 

I did some tuning and datalogging today on my EMS. I now spike 30psi and hold 29psi with some quick changes to my boost/wg duty cycle map. I also messed around with timing so from spool up/peak tq. i'm running around 1* adv. and now running around 12*timing up top/redline. I have no knock at all and think I will keep on going. I haven't touched my A/F's and they sit at 10.8:1 pretty much the whole way from peak tq. to redline. Everyone is telling me I should be out of inj. with E85 and the boost/power i'm running, but so far the A/F are rock steady. I bought this car a few weeks ago and with a few adjustments she feels much much better! I think I'm going to go back to the dyno for some final tuning

 

What peak IDC are you seeing?

 

12:1 will yield more power and is more knock resistant. I know it sounds strange, but lots of people have seen this when tuning E85. I get up to about 5 knock counts in mid-rpms when at 11:1, and when I lean it out to 12:1, no more knock.

Remember to watch power when increasing timing. With E85 its possible to go right past MBT without knock, so the way to tune it is to increase timing until no additional power is made and then back it off a deg.

 

Isn't 12:1 peak A/F's? Why would you want to run on that high of a threshold. It looks like in NY the ethanol content is only a class 3/70% until may which it goes up to the Class1/80%. I think fine tuning on the dyno might be the way to go so I don't go with too much timing and stress the stock internals too much

 

I'll get back to ya on that with more logging...read post below as I did some more logging at am seeing 100% duty cycle at 7500rpms or so...Bigger inj. on the way....just need to know how big

 

12:1 (gasoline calibration) is near the upper range of the maximum power AFR for E85, but it reduces knock, so more timing is possible. If the E85 in your area is closer to 70%, it might be better to run slightly richer. Maybe other people who have E70 can chime in.

 

thx for the help/info....hope more people that have experience tuning with E85 can give some feedback.

I'm getting 0 knock right now where i'm at so I will go up from here...I'll probably lean the A/F's out some and start to increase timing as well

 

E85 is slightly more dangerous than gasolene because it won't knock, even when lean (at least on my cars). Gasolene is nice on a stock evo because it will ping well before you reach mean brake torque with too much timing. On E85 and even E70 in chilly weather (or just a good charge air system) you can easily surpass MBT with no detonation. You can also run lean with no detonation. You probably won't hurt much of anything by running lean (except your ego when your car is breaking up all the time under load). However with too much timing you are putting a lot more strain on the bottom end and the headgasket/headbolts. Your compressing an expanding air/fuel charge as it approaches TDC and basically trying to push the head off the engine.

 

Im seeing 100% duty cycle at 7500rpms...I need bigger inj. I just don't know how I still have plenty of fuel left on the raw fuel table on the EMS, but I'm 100% IDC? Can someone explain this to me? thx!

 

At 100% IDC your injectors are beyond their ideal operating limitations. The rest of your fuel system may still have plenty of remaining capacity, but you can't get the fuel into the motor without either, larger injectors, much higher fuel pressure, or both.

I'd say you need larger (1,600cc ??) injectors for sure.