E85 diary
04-21-2011, 07:32 PM
#42
So today i filled 7.5 gals of 93 and 2.8 of E85. Added 10% across the entire map. I'm running half a point rich in vac and about a full point in boost...down to 11afr. So i'd assume 5% should be good for a 75-25 mix. It seems to be running smoother and with less hickups.
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05-05-2011, 06:59 PM
#43
Alrighty just an update, today was my 2nd partial fill up with more E85.
So my 1st tank i started with 5%, ended up adding it to 7% and it ran good. Today almost at empty i filled it with 2 gals 93 and 3 gals E85. I added 7% across the entire map ran rich so i removed 7% to get it to stock then added 5% and its good now.
Keep in mind 7% and then 5% is not just 13% as you'd expect.
1ms x 1.07 = 1.07ms
1.07 x 1.05 = 1.1235 not 1.13 as you'd get by just adding the total from above.
I've had to change boost also as it was running in the 13s so in boost its more like a 15% while in vac its only 12 so its not flat % across the entire map in other words you'll need to rework your map.
Now how the hell are u guys tunning the spark with that juice?
Personally i feel like its running smoother and quieter.
So my 1st tank i started with 5%, ended up adding it to 7% and it ran good. Today almost at empty i filled it with 2 gals 93 and 3 gals E85. I added 7% across the entire map ran rich so i removed 7% to get it to stock then added 5% and its good now.
Keep in mind 7% and then 5% is not just 13% as you'd expect.
1ms x 1.07 = 1.07ms
1.07 x 1.05 = 1.1235 not 1.13 as you'd get by just adding the total from above.
I've had to change boost also as it was running in the 13s so in boost its more like a 15% while in vac its only 12 so its not flat % across the entire map in other words you'll need to rework your map.
Now how the hell are u guys tunning the spark with that juice?
Personally i feel like its running smoother and quieter.
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05-06-2011, 02:09 AM
#49
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So although you may not detonate due to too much timing for the octane rating, the car will run uber rich on the gas compared to the ethanol blend.
Dann
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05-06-2011, 08:27 PM
#52
Not talking stock ECU's though. Don't know a stock Miata ECU that you can tune...
I found out today that Shell stations up here don't have any ethanol in their 91 yet. So if given the option for what gas to tune on (and run both once it's tuned) would you choose E10 gas or gas with no E? I'm thinking tune with 91 E10, and it should be fine to run 91 with no E?
I found out today that Shell stations up here don't have any ethanol in their 91 yet. So if given the option for what gas to tune on (and run both once it's tuned) would you choose E10 gas or gas with no E? I'm thinking tune with 91 E10, and it should be fine to run 91 with no E?
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05-06-2011, 08:34 PM
#53
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0.2 points? Its 30%. I ran mine dry a few weeks ago driving laps around a block a sevo was on, just to see what it did with just gasoline and a spanner to drop 15 odd degrees of timing out of it. It was uber rich.
Dann
Dann
Last edited by nitrodann; 05-06-2011 at 08:35 PM. Reason: Forgot to type my name at the end...
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08-03-2011, 11:21 AM
#57
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Still haven't properly tuned for power.
I am very interested in power vs mixture temp. E85 doesn't light off as easily if things are too cold. I think that temp is <50°-55°F. I'm wondering if water injection is detrimental to performance at a certain point. If/when I tune I'm planning on testing with and without WI.
I have to admit that I started to add MMO a few tanks ago. Might not be necessary but it probably doesn't hurt anything. Just hedging my bets. Any good two stroke oil is probably better but I use MMO because it's dirt cheap.
Gas mileage is around 22.5-23 mpg with a/c usage.
I am very interested in power vs mixture temp. E85 doesn't light off as easily if things are too cold. I think that temp is <50°-55°F. I'm wondering if water injection is detrimental to performance at a certain point. If/when I tune I'm planning on testing with and without WI.
I have to admit that I started to add MMO a few tanks ago. Might not be necessary but it probably doesn't hurt anything. Just hedging my bets. Any good two stroke oil is probably better but I use MMO because it's dirt cheap.
Gas mileage is around 22.5-23 mpg with a/c usage.
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08-03-2011, 01:55 PM
#58
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WI is absolutely unnecessary with E85. If I can find MBT at 17psi and 350whp through the torque peak on E85, water injection is doing absolutely nothing for you.
E85 is magical ****.
E85 is magical ****.
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