What fuel to run?? on boost

[Chadly]

I'm not trying to get into a pissing match with anyone but he can sell me LL to Jet Fuel and for me personally price is not an issue. They are one of the largest Fuel distributors in the Seattle area. A majority of race gas is made for high rpm's and to be run wide open hence you hear about bogging issues with high octane race gas. A majority of race gases are not designed for chopping the throttle like you do when sledding through terrain. The octane rating is a fraction of statistics that they make available on fuels and only has to do with detonation. As for stating heat is good for an engine that is the funniest thing I have ever read on a forum. Anyone who tells you that or thinks that needs to research how an engine operates. Believe it or not their is a reason why they put inter-coolers and "cold-air-intakes" on turbo engines. Heat not only is the number one horsepower killer it also is the number one thing that wears an engine out. I never argued anyone's experience with the LL in their sled. I just stated why it won't ever go into my turbo sled. I thought this was a forum to state opinions.... My bad!

 

[Wheel House Motorsports]

heat is bad?

I thought it is what drives an internal combustion motor... and the turbo.....

weird, must have been asleep the last few years.

proper heat in the right spots is key, like in your combustion event(see fuel)

 

[backcountryislife]

I'm not trying to get into a pissing match with anyone but he can sell me LL to Jet Fuel and for me personally price is not an issue. They are one of the largest Fuel distributors in the Seattle area. A majority of race gas is made for high rpm's and to be run wide open hence you hear about bogging issues with high octane race gas. A majority of race gases are not designed for chopping the throttle like you do when sledding through terrain. The octane rating is a fraction of statistics that they make available on fuels and only has to do with detonation. As for stating heat is good for an engine that is the funniest thing I have ever read on a forum. Anyone who tells you that or thinks that needs to research how an engine operates. Believe it or not their is a reason why they put inter-coolers and "cold-air-intakes" on turbo engines. Heat not only is the number one horsepower killer it also is the number one thing that wears an engine out. I never argued anyone's experience with the LL in their sled. I just stated why it won't ever go into my turbo sled. I thought this was a forum to state opinions.... My bad!

But you're not stating opinions, you're stating incorrect "facts" that are easily disproved by the majority of people who deal with high octane fuel on a daily basis.

Talking about fuel being "designed for chopping the throttle" is just another example of something irrelevant to the fuel In use.

Your comments about heat are wrong... as one who goes back and forth between the two fuels at different ratios... it's quite to the contrary. Second hand misinformation is an unfortunate thing to regurgitate.

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[backcountryislife]

backcountyislife, will ride mainly 7500'-10000' sometimes unloading around the 6500'.

At 7 psi that seems a bit excessive for 7500+, but a good starting point. I'd sure thank you could get away with pump at those levels, but you'll find the level that works for you... better to start with too much octane than too little!


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[Wheel House Motorsports]

the etec at that elevation and 7# can run straight 91 but might tap the det sensor every now and again around your unloading spots, splash in 2 gallons of av gas for the little low riding you might see and just flog that thing and enjoy it.

 

[Boyko]

I'm not trying to get into a pissing match with anyone but he can sell me LL to Jet Fuel and for me personally price is not an issue. They are one of the largest Fuel distributors in the Seattle area. A majority of race gas is made for high rpm's and to be run wide open hence you hear about bogging issues with high octane race gas. A majority of race gases are not designed for chopping the throttle like you do when sledding through terrain. The octane rating is a fraction of statistics that they make available on fuels and only has to do with detonation. As for stating heat is good for an engine that is the funniest thing I have ever read on a forum. Anyone who tells you that or thinks that needs to research how an engine operates. Believe it or not their is a reason why they put inter-coolers and "cold-air-intakes" on turbo engines. Heat not only is the number one horsepower killer it also is the number one thing that wears an engine out. I never argued anyone's experience with the LL in their sled. I just stated why it won't ever go into my turbo sled. I thought this was a forum to state opinions.... My bad!

The truth is you are rite on a few things. I do apologize for my other post I just do not like the sales pitch running av fuel down with insignificant rhetorical arguments. The two things some race fuels have over av is that av fuel produces less BTUs, it is weaker and makes less heat but not significantly. I don't think you will see it on a dyno because optimized ignition timing will have more of a effect on the out put. 2nd is av fuel has a greater specific gravity, it is heavier so essentially it does not atomize as well. I believe this is to keep it more stable at higher altitudes. Once again not significant

Anyone running race fuel should aware that the stuff can go bad and this is what will destroy your motor! If you want to store it for a season after it has been open it should be purged with nitrogen and sealed up. I have had av fuel sitting in a boosted muscle car for well over a year maybe 2 and it still is good, I also had to run my lawn mower on VP because it turned to $hit the next season.

For some reason folk selling race fuel don't mention the BTU thing nor the shelf life of some race fuels

 

[gus bohne]

Boyko is dead on right.
Fuel going bad in short periods of time is such a big concern for those of us who use it that even dynotech has spent the money to test rvp and octane ON SITE before we chase our *** for hours looking for lean spots or det issues that do not exist.

so much time is lost to fuel that has SOURED in plastic cans, or those convenient 5 gallon pails with the plastic crimp seal , as well as pistons and cranks hurt from stale fuel its a shame.

One of the things a person should keep in mind is shelf life or in tank life. avgas by its design is meant to hold for longer periods of time, the light ends used in it as well as the aromatics are much less. These things are what bleeds out of Race blends when exposed to air ( your sled tank vent is the air leak ) on the sled, the crimpseal on the 5 gallon pail is the leak there.

Avgas has a so much less of these additives it last much longer. ya maybe slightly less volatile but much more consistent.

airplanes falling fromthe sky due to weakened avgas is really bad for business..hence the reason it has to be more stabil IN TANK than our race fuels.

ALL of my mx guys use some sort of race fuel, we ALL love the highly oxyed fuels but must accept that when we open that fresh DRUM the bike is going to react differently that day than it will on the next pull from that drum due to dilution of the light ends. AND I DO use a nitrogen blanket from day 1 till the last pull of fuel..
thank you carl millen..

 

[jvb]

So I have couple questions. I have always ran Sunoco supreme in my 1200 and ususally run around 16-18lbs. Think you could run av gas or should stick with what I got. Usually ride around 3-6k . Also the shelf life thing. I have 55 gallons drums. One I opened last year and there is probably 15-20 gallons I obviously seeled it up but that was it. Think its good or should I discard it. Then I have a drum that is probably two years old but never been opened. Whats everyone thoughts.

 

[gus bohne]

imo, way toooo old to trust for a 2 stroke turbo using it.

is your 1200 a 4 stroke or a cat turbo big bore ? what is your octane requirement? av is only 105 ish motor octane..

 

[jvb]

imo, way toooo old to trust for a 2 stroke turbo using it.

is your 1200 a 4 stroke or a cat turbo big bore ? what is your octane requirement? av is only 105 ish motor octane..

yeah four stroke?

 

[kfa670]

the etec at that elevation and 7# can run straight 91 but might tap the det sensor every now and again around your unloading spots, splash in 2 gallons of av gas for the little low riding you might see and just flog that thing and enjoy it.

Couldn't be more accurate imo.

Over by Philipsburg, 2-3 gallons of AV per tank, sometimes more sometimes less, 7-8 lbs in the etec from 7000-10000. No problems at all.

AV imo is the way to go. Some seasons I get a lot of riding in, some I don't, but AV has a superior shelf life, excellent QC, and the price is right.

Hit me up sometime if you want to get out of the Bozo area and head 2 hours west.

 

[sledhead9825]

Chadly
Where you buying Trick 114 for $7.50? Is that at the pump or by the barrel? I was paying that last year,this year Small in Auburn is at $10.50 at the pump. If you are mixing av or race at 30% and 70% pump, to get your desired octane, it probably doesnt matter what fuel you go with. Running 100 % is a different story.