I'm pretty excited about this. A friend that tunes my car has always praised the merits of ethanol, and I've always been a chicken to try. Glad I finally listened. He's doing a fantastic job!

Mods:
Blouch Dom2.0XT
ID1000cc injectors
Aeromotive stealth 325 fuel pump
Grimmspeed 3 port
E40 tune
Tomei DP
T1R 76S cat back and test pipe
Sakura FMIC, upper and lower IC piping, and intake
Turbosmart dual port in full recirc

Thanks for looking! The car really rips for such a mild setup.

 

Nice work brotha. How's the clutch?

 

 

this like a bbx full?

 

Bit smaller than an old BBX full. Kind of a midway point between it and the lite. Spool is great, clutch is totally fine. It's like stock snail torque with everything phase shifted over to the right, so you get way more horsepower. Loves to rev.

 

That's a nice power band for a street car!

 

Somewhere around E50 and around that power level the ID1000 would run out. I am curious what your injector duty cycle was and how do you tune for E40 and then make sure the next tank of gas is close enough in ethanol content ? Are u using an ethanol content gauge ? Tephra mod for flex fuel ?

 

It's basically being used for knock resistance. The tune is 98% the same as his 93 oct tune.

His IDC is 87% at 7300 RPM.

Here is a log of it if you would like to take a look:

http://datazap.me/u/razorlab/seth-e4...12&zoom=11-117

The other questions I will let him answer.

 

See Bryan's post directly above on IDCs. He's the one tuning my car.

As far as E40 mixture, it's an easy mathematical equation. 3 parts 93 (E10) to 2 parts E85. For the first tank, that was 5.8 gallons and the remainder (8.7) 93 octane, topping off. After that, I wait until I have just under 1/4 tank and just put in 4 gallons of E85 and 6 gallons of 93. It won't fill completely, but I don't care.

I've also ordered two VP Racing 5 gallon containers so I can premix 3 gallons 93 and 2 gallons E85 and have some at home. This way, there's always a consistent mix. If they reformulate E85 for summer, I'll be watching my trims, but I'm sure it'll run a little funny. I have Tephra V3 and might go flex fuel eventually, but the consistency of this mixing method is unlikely to let me down.

The station is only 2 miles from my house, so even without the containers, it's pay for 4 gallons of corn, reswipe card and 6 gallons of 93 on top. Cake.

 

Bro I did not know you know how to tune lol you're in alameda right?

 

So your not going nuts with timing and fueling, but rather have a fixed scaling number for ID1000's for around E40 or so mix ? Your using the ethanol for margin and some power, but not an all out tune.
I abandoned going E85 because I didn't want to take the plunge for an E85 gauge and bigger injectors (I have ID1000's too). You have found a fantastic way around all that. I like it

Out of curiosity what is that scaling number you ended up with for E40?

I wonder how much variance a fixed injector scaling number can handle? 10% swing in ethanol content or 20% ?
So if you mix up E30 or E50 by accident I wonder how much the fueling would be off.

~Jaraxle

 

It's running an extra 2 degrees timing up top, boost and fueling are slightly different as well, but really close. It just pulls through the rev range so much cleaner and I don't have to worry about the 3-4 counts I was getting sporadically on pump gas.

My E40 injector scaling is 770.

The only way it will swing that much is if they go to a summer blend of e85. I can't imagine it varying more than 15% ethanol (70 winter and 85 summer), which would put me E34 at the lowest and E40 in the highest. I won't alter the way I am doing the mix, and am monitoring the trims very often.

Bryan mentioned that since the tuning differences are pretty small, the risk of danger is much lower. We've talked about the flex fuel setup, but I don't have an Android phone, and I can't run more than E40 with these injectors anyway, so it makes sense in the short term just to watch it.

Sludge on the east coast scares me, so I will definitely put a tank or two of 93 after 3-4 E40 fillups.

I also have an ethanol friendly sock en route to replace the OEM one I reused on the end of my Aeromotive pump.

 

I noticed your comment about sludge. I had injector dynamics on the phone one day, and I asked about the sludge black tar that people randomly seem to get on the injectors (thus clogging them). The injector dynamics tech said that it was from the incorrect rubber type fuel hose being used to carry E85 SOMEWHERE in the fuel system. Whether it be in the tank, or the return line, etc. I have not done E85 yet, so I cannot comment myself; but I thought that was interesting since they probably have a LOT of experience on the issue (cleaning and refurbishing injectors and all).

I like what you did with this E40 setup. The mixing is slightly a pain, but you avoid spending 900 more on injectors + a gauge and sensor and your talking around 1200 bucks or more. Please post back if you have to change your scaling from fuel trim swings when the summer mix of E85 hits the stations. I am curious, and am thinking I might have to try this same method.
Thanks for posting. Also I looked at your tune logs - they look GREAT. Your AFR is locked in and you basically have no knock with nice clean timing. Do you know about what RPM you make 200 lb-ft of torque. That is a good measurement of "lagness" and that turbo seems to be friggin awesome. It was on my radar if I don't end up with an EFR.

~Jaraxle

 

Thank you for the kind words. The quality of the tune is all Bryan's skill. I can't say enough good things about his work.

I'm not sure where 200tq would be. I usually wait until almost 3500 or so to start the run in third gear with Evoscan. Since these cars are geared so short, its very quick in 5th gear accelerating from interstate speeds.

The only time I noticed a little lag was letting the clutch out in first from a stop sign at like 1000rpm, then trying to accelerate hard when an intersecting car surprised me and came over a hill pretty fast. It was a little scary for a couple seconds, lol.

 

Bryan,

Are you tuning again? I got a Dom 2.0 for you to do if you're back at it again

OP sorry to go off topic for a second.


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