True Octane of 50/50 AV Gas

[GNDAN]

Hello,

I have an interesting situation here... I ride my sled the majority on the trails to get to our riding fun spots up north and from establishment to establishment (Yeah yeah I know your guys' take on trails).

Regardless I would like to run 6-7 PSI Boost and I understand I will need to mix 50/50 with AV Gas (98 Octane) to run these boost levels at 0-3000'.

I recently came across 7 gallons of Xylene at the Local Lowes for $3/gal (Not a typo) on clearance so I picked up every gallon they had in stock to mix since I see this as being a great option since I will need to carry at least 10-11 gallons worth of fuel mix on board when we go out riding.

With averaging (What the online calculators use) I am seeing 94.5 Octane Mixing 100LL (98Oct) 50/50 with 91.

I see mixing 1.3 gallons (Gas rack gas can size) of xylene to 8.7 gallons of 91 I am getting 94.5 octane. This would also yield me 20 gallons of fuel from an attitude gas rack.

I used to do this very often back in the day with my Buick Grand National and it worked very effectively at suppressing detonation. In this specific case it would be VERY a very cost effective option and I would have a bunch of fuel worth on board.

Is there any negative to mixing like this in a 2-stroke other than Xylene typically being $19/gal? I will run 1oz/gallon of oil as well so I would think this would make up for the "Drier" fuel.

Thanks In Advance, Dan

 

[carms]

whats the point of this..run straight vp c12 so you don't have to worry about anything. Why spend money on a turbo and cheap out on gas?

 

[m8magicandmystery]

lets stick to answering the questions he asked....

and if I could I would..

 

[GNDAN]

whats the point of this..run straight vp c12 so you don't have to worry about anything. Why spend money on a turbo and cheap out on gas?

That wasn't the question I asked, fuel cost isn't the issue here... I wouldn't hesitate to run 100% Leaded 110 since I can get it for $6 a gallon down the road from my house, but as I originally posted this sled will need to carry about 10 gallons worth of fuel mix on board.

Thanks, Dan

 

[noxis]

110

Where are you getting 110 for 6 $ a gallon

 

[GNDAN]

http://www.racegas.com/loc/3125

,Dan

 

[carms]

your mixing fuel bud, clearly cost is an issue. read your original message. I don't know anyone who would buy cheap fuel from Lowe's. And yes i did answer your damn question..CHEAP!

 

[Boyko]

Your motor is tuned for a specific octane, depending on boost and elevation. Nothing wrong with mixing in some pump to get there. To much octane and your throttle response gets soggy, altitude + to much octane and it really gets soggy. I surprised you don't know this carms. The problem is this dude has to haul fuel to mix with pump gas, you did not answer his question.

I’m not a fan of octane boosters, you can try your Xylene and see if you deto sensor picks up a problem.

 

[GNDAN]

your mixing fuel bud, clearly cost is an issue. read your original message. I don't know anyone who would buy cheap fuel from Lowe's. And yes i did answer your damn question..CHEAP!

I am not sure where you are going with this... I also fail to see how this in any way answered my question? I never said anything about race gas being too expensive or anything of that nature... What I did say is mixing 50/50 with a higher octane fuel would not net me much extra fuel which in MY CASE IS A PROBLEM. I stated that with the cost of the Xylene I found I will be trying it and ASKED FOR INPUT ON ANY ILL EFFECTS OF USING XYLENE IN A 2-STROKE..

If you have no useful input please stop interrupting my post.

,Dan

 

[GNDAN]

Your motor is tuned for a specific octane, depending on boost and elevation. Nothing wrong with mixing in some pump to get there. To much octane and your throttle response gets soggy, altitude + to much octane and it really gets soggy. I surprised you don't know this carms. The problem is this dude has to haul fuel to mix with pump gas, you did not answer his question.

I’m not a fan of octane boosters, you can try your Xylene and see if you deto sensor picks up a problem.

Thanks Boyko, I will be tuning for a 1:6 mix of Xylene and that is what I plan to run if it works out well. Even at full price this might not be a bad idea to keep going with since it would make the fuel about $7 a gallon which is a little over race or 100LL gas around here but I will be able to get 8 gallons out of every gallon I have on board which fits my criteria perfectly.

I was just hoping someone out there would have tried this at some point in time and could give me a definite yes or no. I guess when your not riding a couple hundred miles a day and don't have 91 fuel stations readily available along the way though there is no need to exploration this option.

Thanks,Dan

 

[harf69]

Try calling twisted turbo's. I believe Shane Stanger was using something of that sort with his turbo kits. I don't have his # sorry but just look up twisted turbo's .Why do some peeps just have to be puds

 

[JonezyBones]

From the little research I did on Xylene it seems comparible to Toluene. Toluene has an AKI of 114 and can be found at your hardware store for about the same price. Toluene can significantly help in turbo applications because it has a denser smoke that can actually aid in spinning the turbine. But the downside of solvents are that they can eat away at your fuel pump, fuel lines, and any other rubber components. Also some solvents sometimes dont burn as well unless they are pre heated before being ignited. Looking for an easier alternative it could be worth a shot. Let us know how it works out!

 

[GNDAN]

I am looking to find some information right now on weather or not it will truly wipe away the oiling on the rod bearings in a CFI application and have bad results. I am thinking that since the fuel is already mixed with some oil and then the oil is directly sprayed onto the bottom rod bearing the "Cleaning" affects of the oil on the bearings from the Xylene should have minimal negative affect. I am trying to verify this before hand.

Thanks, Dan

 

[guidoxpress]

any updates on using Xylene?

 

[allblowdup]

FYI AV gas is only guarenteed to be at least 100 octane. I have never seen a batch that was. I have seen all the way from 103 to 112. Every batch comes with a test sheet to be recorded for that batch(you know the FAA) Not that it will cause you a problem but you can't assume a number. Mixing fuel is always a bit of a crap shoot. Not saying it is bad just a few unknowns.

 

[sledhead9825]

FYI AV gas is only guarenteed to be at least 100 octane. I have never seen a batch that was. I have seen all the way from 103 to 112. Every batch comes with a test sheet to be recorded for that batch(you know the FAA) Not that it will cause you a problem but you can't assume a number. Mixing fuel is always a bit of a crap shoot. Not saying it is bad just a few unknowns.

Why is mixing fuel a crap shoot?

 

[allblowdup]

Cause just like I explained you never know for sure what the octane will be in the end. If you arror on the wrong side you are buying pistons or worse.

 

[sledhead9825]

Cause just like I explained you never know for sure what the octane will be in the end. If you arror on the wrong side you are buying pistons or worse.

50/50 mix example. You add Race gas octane + pump octane =___ divided by 2 =____. If you error on the wrong side you get a det light. If you have to run AV gas work from 100 octane and you will be safe. If you go to the gas station and buy midgrade,it is premium and regular mixed in the pump.
I run Trick or Sunoco race gas always tests well. I have heard that VP doesnt always test well but could be rumors.