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      10-03-2018, 10:51 AM   #23
aann
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Originally Posted by gab24m3 View Post
You are correct! I thought I put 21.1. Well I added 3 gallons today and on the butt dyno, I did feel more power. Iíll have to confirm with my dragy. I will add four gallons next time and record results.
So basicly you add ethanol only 4 galons to full tank on 91 octane ?
Any 100-200 km/h numbers ? Is there any improvment ?
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      10-03-2018, 12:44 PM   #24
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Originally Posted by aann View Post
So basicly you add ethanol only 4 galons to full tank on 91 octane ?
Any 100-200 km/h numbers ? Is there any improvment ?
The short answer is yes and if you are looking for data to back it up, use the
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      04-11-2020, 12:08 PM   #25
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Originally Posted by gab24m3 View Post
You are correct! I thought I put 21.1. Well I added 3 gallons today and on the butt dyno, I did feel more power. Iíll have to confirm with my dragy. I will add four gallons next time and record results.
Any issues after running 4Gals of E85 for a while now?
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      05-07-2020, 11:16 PM   #26
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To all these people in California putting a few gallons of e85 in their M6 and feeling a difference, is this on the same map or are you switching to a 93 octane map? Will it be bad to put a couple gallons of e85 on a stock tune no mods?
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      05-07-2020, 11:25 PM   #27
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Originally Posted by ThatKidDavid View Post
To all these people in California putting a few gallons of e85 in their M6 and feeling a difference, is this on the same map or are you switching to a 93 octane map? Will it be bad to put a couple gallons of e85 on a stock tune no mods?
Not sure this you (or your car) would benefit from it, but at least my owners manual says that you can fill up with fuel with less than 10% ethanol. I believe E85 is 15%, but if itís only a small portion of the whole tank should be ok...
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      05-09-2020, 02:28 PM   #28
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Originally Posted by M6Roar View Post
Any issues after running 4Gals of E85 for a while now?
No problems for me. I ran 20% ethanol in my M5 for 2 years without an issue. I am now doing the same in my M6. There is significant performance difference for both cars not running E20. Both cars have Mission stage 1 tune. I have never gone beyond 20%.
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      06-05-2020, 07:10 AM   #29
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I opened this thread 2 years ago , and im still confused 🤔
Yesterday i had my hands on Vp ms109 fuel , i throw 5 gallons in half tank on my m6 f13 stage 1+ hcp , the car behave very weird , it felt heavier and my gps data were slower , with 93 octane my 100-200 km/h was 6.2 seconds (62-124 mph ) , with the Vp ms109 my car now is doing 100-200km/h in 7.4 seconds .
Anybody can explain to me whats wrong here ??🤔
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      06-05-2020, 01:17 PM   #30
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Originally Posted by Doubledingo View Post
No problems for me. I ran 20% ethanol in my M5 for 2 years without an issue. I am now doing the same in my M6. There is significant performance difference for both cars not running E20. Both cars have Mission stage 1 tune. I have never gone beyond 20%.
Interesting data point.
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      06-18-2020, 05:16 AM   #31
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Originally Posted by aann View Post
I opened this thread 2 years ago , and im still confused 🤔
Yesterday i had my hands on Vp ms109 fuel , i throw 5 gallons in half tank on my m6 f13 stage 1+ hcp , the car behave very weird , it felt heavier and my gps data were slower , with 93 octane my 100-200 km/h was 6.2 seconds (62-124 mph ) , with the Vp ms109 my car now is doing 100-200km/h in 7.4 seconds .
Anybody can explain to me whats wrong here ??🤔
Anyone can help , my car becase noticably slower .....??
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      06-18-2020, 02:57 PM   #32
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Quote:
Originally Posted by aann View Post
I opened this thread 2 years ago , and im still confused 🤔
Yesterday i had my hands on Vp ms109 fuel , i throw 5 gallons in half tank on my m6 f13 stage 1+ hcp , the car behave very weird , it felt heavier and my gps data were slower , with 93 octane my 100-200 km/h was 6.2 seconds (62-124 mph ) , with the Vp ms109 my car now is doing 100-200km/h in 7.4 seconds .
Anybody can explain to me whats wrong here ??🤔
Could be a number of reasons...did you speak with your tuner prior to running the fuel? The tune SHOULD adapt to the added fuel/timing but its always good to double check. Spark plugs - have you changed/gaped them since adding a tune? Misfiring maybe? Weather conditions...Were your test ran with similar DA's?

I personally run boostane on occasion. Going from 93 to 98oct yielded a gain of .30 secs on my 60-130 in similar conditions. Could likely drop another .3/4 secs if running on 100.
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      07-06-2020, 05:21 AM   #33
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Originally Posted by Flo1989 View Post
Could be a number of reasons...did you speak with your tuner prior to running the fuel? The tune SHOULD adapt to the added fuel/timing but its always good to double check. Spark plugs - have you changed/gaped them since adding a tune? Misfiring maybe? Weather conditions...Were your test ran with similar DA's?

I personally run boostane on occasion. Going from 93 to 98oct yielded a gain of .30 secs on my 60-130 in similar conditions. Could likely drop another .3/4 secs if running on 100.
Yes i contacted him , my tune is from HCP , recentlly its very difficult to contact him, dont know why .
I usually run 98oct for my tune and the car made 100-200 km/h in 6.2 best time .
Now its defferent , my best time is 7.2 s' .....
I didnt check the spark plugs or changed them , is there any way to know if my spark plugs are bad , becuase other than that the car drives fine ....
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      10-15-2020, 10:26 AM   #34
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Quote:
Originally Posted by Flo1989 View Post
Could be a number of reasons...did you speak with your tuner prior to running the fuel? The tune SHOULD adapt to the added fuel/timing but its always good to double check. Spark plugs - have you changed/gaped them since adding a tune? Misfiring maybe? Weather conditions...Were your test ran with similar DA's?

I personally run boostane on occasion. Going from 93 to 98oct yielded a gain of .30 secs on my 60-130 in similar conditions. Could likely drop another .3/4 secs if running on 100.
New update after a while, i changed the spark plugs whith stock gap , and did a service include oil and filters , also changed the airfilters , but still my car feels slower , also my 100-200 km/h is slower ,my best is 7.4 s' instead of 61-6.2s' 🤷

Last edited by aann; 10-15-2020 at 10:43 AM..
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      10-15-2020, 12:35 PM   #35
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All things equal, higher octane will decrease power. The only benefit to running higher octane levels is if you increase boost or timing to take advantage of the detonation resistance of the octane levels. So if you weren't already having knock issues, this result is expected IMO. There is an entirely different discussion regarding fuel chemistry vs power, beyond just octane measurements.
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      10-15-2020, 08:09 PM   #36
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Originally Posted by patchesj View Post
All things equal, higher octane will decrease power. The only benefit to running higher octane levels is if you increase boost or timing to take advantage of the detonation resistance of the octane levels. So if you weren't already having knock issues, this result is expected IMO. There is an entirely different discussion regarding fuel chemistry vs power, beyond just octane measurements.
All things equal this is true but the M6 can read octane and adjust accordingly. Even on stock tune you can increase the octane and the benefits are noticeable. Confirmed with my tuner. On a stage 2 91 map I can fill up to e30 and the dme will auto adjust
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      10-15-2020, 08:13 PM   #37
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Originally Posted by aann View Post
New update after a while, i changed the spark plugs whith stock gap , and did a service include oil and filters , also changed the airfilters , but still my car feels slower , also my 100-200 km/h is slower ,my best is 7.4 s' instead of 61-6.2s' 🤷
Gap to .022 and maybe your high pressure fuel pump cant keep up 🤷*♂️ try just 2 gallons and see if the car runs stronger
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      10-16-2020, 07:45 AM   #38
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Quote:
Originally Posted by ThatKidDavid View Post
All things equal this is true but the M6 can read octane and adjust accordingly. Even on stock tune you can increase the octane and the benefits are noticeable. Confirmed with my tuner. On a stage 2 91 map I can fill up to e30 and the dme will auto adjust
That is pretty interesting. Do you have any info on how it does this measurement? Can your tuner point us towards the ECU tables that control timing and boost vs measured octane?
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      10-16-2020, 11:40 AM   #39
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I have an e85 station right by my house, and run 4 gallons of e85, the rest 91, every time I fill up. There is most definitely a difference, specially right now that it is 100 degrees in the middle of October here in Los Angeles. I ran the car for one full hot day on just 91, the car felt sluggish. then came back and pumped 4 gallons of e85 the same day as soon as my gas tank had the space; I can confirm it is not just my imagination lol.
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      10-17-2020, 11:12 AM   #40
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This thread has intrigued me enough to head out and see what the ethanol content in the fuels I have access to. I religiously run BP 93 in my car as it's the highest octane available without being cost prohibitive. Does anyone know what the ethanol content in BP's 93 octane is? Is it just E10 or is it less? I have seen some mentions in Google searches of it possibly being lower.

Conversely, does anyone know what the true ethanol content of E85 from Speedway or Holiday is? It's stated that the content can be between 51% and 83% but I'm sure it varies based on the 'brand'. Also the octane content available in the E85 at these stations. Can't seem to find this info anywhere and want to make sure I'm putting in the right ratios to stay under 20% ethanol in the tank
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      10-19-2020, 11:12 PM   #41
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Ljohnson32 I have three gas stations near me here in The Valley in Los Angeles that sell pump e85, and none of them have ever been over 78%. Never lower than 75, I know this because I also have a GT-R setup with E85 content analyzer. Recently I pumped right under 5 gallons on accident into the M6, and I noticed no difference other than the same power bump I usually feel by adding 4 gallons, nothing funny happened ever and I finished the entire tank.
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      11-07-2020, 09:38 AM   #42
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Originally Posted by ThatKidDavid View Post
Gap to .022 and maybe your high pressure fuel pump cant keep up 🤷*♂️ try just 2 gallons and see if the car runs stronger
Still , the car feels weaker , even in colder tempreture's in these days , the thing is that my tune is in the car for about 2 and half years so maybe the car became weaker with time ??? Or should i just retune the car or flash the car with another tune ??
I still have the stage 1 + file , i can flash the cars home but i dont wanna waste my time doing it if the result will be the same !!!!
Im currently running a stage 1 + tune with 22 psi boost ...
Anyboy can thing of something ?

Last edited by aann; 11-07-2020 at 09:55 AM..
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