Oxygenated Fuel with Stock Tune
05-29-2017, 01:32 AM
#21
Le Mans Master
Yeah, but he hasn't! ;)
In my expeirence the volume required for MS109 is not that much more than non oxygenated fuels like VP 100 unleaded. Maybe a few percent. Stock tuning is probably fine but stock tuning plus an intake, like running E15 or E20, might work for some cars and might trigger faults in others. The actual AFR variance is going to be minimal and you're on high octane so I would not worry too much about detonation from the AFR running a little leaner.
Like most problems easy to fix with a tune, of course.
Like most problems easy to fix with a tune, of course.
Last edited by johnglenntwo; 05-30-2017 at 07:13 AM.
05-29-2017, 08:24 AM
#22
Race Director
Member Since: Jul 2007
Location: Texas Hill Country
Posts: 10,763
Received 2,379 Likes
on
1,238 Posts
http://archive.jsonline.com/business...145462735.html
Older article from MIlwaukee, WI newspaper talking about issues with speciality blend required. Also shows map outlining areas of the country required to burn this blend per EPA. Years ago we added MTBE ,per EPA, to local 93 octane but caused huge problems with ground water contamination.
Older article from MIlwaukee, WI newspaper talking about issues with speciality blend required. Also shows map outlining areas of the country required to burn this blend per EPA. Years ago we added MTBE ,per EPA, to local 93 octane but caused huge problems with ground water contamination.
It does say a summer blend vs winter blend, which is done in all the major metroplexes across the US. As best I can tell that's all the "reformulated" gas is that the article is talking about....nothing new, since the 90s.
Here's another earlier article about summer blend.
http://www.slate.com/articles/news_a...blend_gas.html
Difference between summer and winter blends:
http://newsroom.aaa.com/2013/06/what...lend-gasoline/
And modern day fuel that is sometimes referred to as "oxygenated" just means "with ethanol." Most (almost 100%) of the country runs E10, talks of moving to E15, and of course E85 available in many places now as well (which turned out to be a cheap race gas for many gearheads).
So while your local paper makes it sound like a unique geographic need, so do other local papers everywhere else.
We use summer blend/winter blend and ethanol fuels in Texas also, at least in the places there are actually people....
05-29-2017, 08:38 AM
#23
Le Mans Master
Lean fuel trims!!!!
1.) Check - PCV, MAF.....
https://www.yourmechanic.com/article...-blake-griffin
2.) Check your aftermarket tune!
CALIBRATION!
They aren't reformulating the fuel for you so "Why stroke it!"
https://www.yourmechanic.com/article...-blake-griffin
2.) Check your aftermarket tune!
CALIBRATION!
They aren't reformulating the fuel for you so "Why stroke it!"
Last edited by johnglenntwo; 05-29-2017 at 08:55 AM.
05-29-2017, 09:56 AM
#24
I use ms109 now and have used it when the Callaway had their tune in it, no issues with codes.
John
John
05-29-2017, 03:50 PM
#25
Instructor
Thread Starter
Just what I needed to know....thanks OnPoint and h3mpking. It was either a fluke or I have something else going on. I've probably run another 700 miles since reset and plenty of hard pulls and it hasn't come back so I assumed it had to be the fuel. I've run VP 109 /91 blend at Mojave with great success, but this was first time with VP MS 109 /91 blend. Guess I will have to wait and see if it reappears.
05-29-2017, 04:04 PM
#26
Le Mans Master
Fuel trims +-10%!?
PCV or something eats up say 7%.....
I've seen benign problems throwing this code tuned out by artificially downsizing the injectors.
PCV or something eats up say 7%.....
I've seen benign problems throwing this code tuned out by artificially downsizing the injectors.
Last edited by johnglenntwo; 05-29-2017 at 04:29 PM.
05-29-2017, 04:45 PM
#27
Instructor
Thread Starter
05-29-2017, 05:18 PM
#28
Just what I needed to know....thanks OnPoint and h3mpking. It was either a fluke or I have something else going on. I've probably run another 700 miles since reset and plenty of hard pulls and it hasn't come back so I assumed it had to be the fuel. I've run VP 109 /91 blend at Mojave with great success, but this was first time with VP MS 109 /91 blend. Guess I will have to wait and see if it reappears.
Hopefully it never comes back. What was your standing mile speed?
05-29-2017, 05:20 PM
#29
Le Mans Master
Wow, that's fantastic! ;)
But, please do take another view then it being the standard better fuel, because that at least has been proven truly pointless!
So in synopsis your car and/or the fuel were too out of spec. If it happens again at different gas stations look at your car!
Last edited by johnglenntwo; 05-30-2017 at 07:15 AM.
05-29-2017, 06:08 PM
#30
Instructor
Thread Starter
I'm embarrassed to say but will. 177 mph. At Mojave (roughly 2500 ft elevation) I ran 190.1mph at the one mile point. NORC one mile is held just outside of Ely NV at 6500 ft elevation and altitude sure doesn't help. Last year I ran 180 mph in NV but had the stage 2 caps on the front splitter vs the stage 3 canards this year and that could explain the 3 mph delta. In all cases I have taken the stage 2&3 wickers off the rear deck for the speed events. My rationale for running S3 canards was wanting full aero for the 90 mile event because I was running their new 155 mph target class. Swapping out the canards in the field is a PITA, so next year I'm going to run both the mile and 90 mile events with all the aero off.