LNF Ethanol Experiment

[Iam Broke]

I've been posting this at HPT since we really didn't have a place until now... Here's a summary of what I've found on my not quite stock LNF SS/TC.

I started out with a mix of E10 93 and E85 and over time have increased the percentage to the point where I was up to 33% Ethanol by volume yesterday. Thanks to Steddy & Terminator I learned the max injection ms window is 5.6 ms @ 6k rpm.

The LNF has no Lambda table for fuel type available in HPT so to compensate for the change in fuel Lambda the MAF freq table was shifted positive as needed as the ratio increased. At 33% E the MAF freq shifted positive 6.5%. Note that I am running a blow through MAF.

My slobalt has always suffered from more KR than most on the 93 in my area even seeing knock logged as low as 12* advance on 93. This experiment has solved that issue and I am currently running .90 PE lambda with 21* advance at 6300rpm & up. No KR logged at 280% air load to date.

My setup boosts 24psi at 4k tapering off to ~19psi @ 6500 depending on load & conditions. MAF freq dialed in I log ~35 lb/min airflow at 24psi at times. Stock turbo, 'nuff said.

I am currently at 5.3 ms ID at 35 lb/min @6k. Trimmed over .5 sec off of my 60-100mph ricer run times in high humidity and ambients of 85-100*, IAT2's logged up to 115* with no KR on my tune.

While blending the percentages requires 2 card swipes at the pump, the results are worth it.

The ratios I calculated by volume are as follows, please correct me if you find them in error.

E10 to E85 blend %E by volume:
6:1 is 20%E
5:1 is 22.5%E
4:1 is 25%E
3:1 is 29%E
2:1 is 35%E

I increased the ratio to 29% E today, time will tell.

Gimpster has been experimenting with his stock sedan with good results also.

Too bad we lack injectors & fuel pressures to allow us to run E85.

[BackyardTurbo]

I wish I had a station anywhere close to me to try it out as well. Im liking the results you've been posting

[F_Imports_09tc]

Good info. Too bad there is not E85 near me

[Gimpster]

Hey, I guess living in the sticks has its advantages after all!

My car is stock down to the airbox snorkle, and I've been very happy with the results so far. Especially considering its been 95-100oF + 75%+ humidity here as well. I'm sure that alcohol being directly injected is very good for LNF owners. I would like to mod the car a bit and throw more boost at it, but im in a situation where I can't do a clutch job right now.

Anyway, hopefully some folks who are close to pumps might give it a whirl.

[occsdude]

would be nice if i could even get e85

[Iam Broke]

I found this locator to be accurate for my area at least.

http://drivealternatives.com/

[BackyardTurbo]

Sorry, no E85 stations near here. LAME!


It says there is one 25 mins away from where I work tho. Maybe one day Ill take a trip and try it out. Have you noticed you burn thru gas faster??

[Iam Broke]

Average commute MPG by the dash avg dropped from 30.4 on my commute to 29.2 as of today. I reset it at each fill during this test. Not enough to complain about when it's $2.09/gal here for E85 vs. $2.99 for E10 93.

[elecblue06]

I wish I had a station anywhere close to me to try it out as well. Im liking the results you've been posting

come by me if you want to experiment

[YelloEye]

Interesting

[Iam Broke]

^^^Damn nice avatar thar.

[YelloEye]

Thanks, I found it thru google I think lol

[Steddy]

ZZP already tried full on e85 on the stock turbo.

Didn't work out too well

But this is the best way to introduce more meth to the system

When you use meth through the ports you lose the efficiency of the the DI

[Gimpster]

Steddy, you must have been the post I saw the other day saying that. Over on the HPT forum oldskool was wondering why we weren't injecting.

Honestly I just trust this WAY more than some ancillary pump from China. Maybe thats stupid of me, but thats how I feel.

[Steddy]

Steddy, you must have been the post I saw the other day saying that. Over on the HPT forum oldskool was wondering why we weren't injecting.

Honestly I just trust this WAY more than some ancillary pump from China. Maybe thats stupid of me, but thats how I feel.

I didn't read it, just kinda always made sense to me

[Iam Broke]

5.2 ms Inj duty @ 6k today, .90 PE lambda but 115* IAT2's. 95* ambient, very humid, Dew points still in the mid 70's. Thin air, less fuel. A few tenths slower on 29% E in the heat. I'll need to compare on a bit cooler day. I did see a few degrees KR at throttle tip in on the second pull.

[Gimpster]

Went to the track tonight, trapped a 106.94 as my best in 97F heat. IAT2's were approaching 130 the middle of 3rd gear.1.5* of retard when the IAT2's got above 115 basically.

All in all I was pretty happy considering the sedan is mechanically stock, and I was pulling 2.4-2.5 60's (heh... fail) not to mention it was like 97 out. When I got into the car to head to the track the OAT said 103! Got on the highway and it backed down to 99-100.

This was still on 30ish % E85. Kinda wish I had tossed in another gallon before going now.

[Steddy]

5.2 ms Inj duty @ 6k today, .90 PE lambda but 115* IAT2's. 95* ambient, very humid, Dew points still in the mid 70's. Thin air, less fuel. A few tenths slower on 40% E in the heat. I'll need to compare on a bit cooler day. I did see a few degrees KR at throttle tip in on the second pull.

Are you on the stock tune?

If so, that should pretty much always happen.

Tuned yourself, have your turned off the tip in retard? Be careful, because its kinda meant for the midrange punch, but once you adjust the timing accordingly it's better than leaving it ramped up and relying on the tip in to do your business

[M-Dub]

Damn you must really have some **** gas by you to get knock on 13* of timing....

I am running 21* right now on 93 pump no knock whatsoever and no meth at the moment. Good results thus far with it... keep us updated....

[Iam Broke]

Are you on the stock tune?

If so, that should pretty much always happen.

Tuned yourself, have your turned off the tip in retard? Be careful, because its kinda meant for the midrange punch, but once you adjust the timing accordingly it's better than leaving it ramped up and relying on the tip in to do your business

No, far from stock. Tip in retard table runs out of the pic at around 2800-3k on my setup, I forget. This happened at a punch around 3700 in third. My LTFT's are still about 2% off so I'll leave it until I get that settled in again.