Full Version: Race Gas Mixed With Pump Gas For A Two Stroke....
I am going to hate running straight race gas at $4 a gallon for 110 octane. I could save a little money by mixing the two 50/50. What are the pro's and cons if any?
it will be fine...thats what i did with my ktm 125, if you half it with 92 octane i think its like 102 or something.....
I did it in my banshee as well as my buggy right now. Works great and you don't spend so much on fuel..
cha
take the two octane ratings and add them together, divide by two then take the sum and add two. example 92 octane + 110 octane = 202 octane 202/2 = 101 octane, 101 +2 = 103 octane this will put you into the 95% correct ballpark. most pump gas octane ratings are close to the specified amount, but do fluctuate from station to station depending on fuel consumption. If a station is slow the octane rating in the main tanks will drop over time from water absorption. Also your race fuel will depreciate its octane level once you crack that vacuum seal. It is best to burn all the fuel you take with you. If you let it sit once opened for anything longer than a week you will run the risk of a poor octane level and possibly sieze an engine.
damn i divided wrong! lol st00pid algebra LOL!
Now say I order a drum of 110 octane race gas. Does that mean it will go bad in a weeks time after I open it? If so, thats alot of money down the drain. Even being stored off the ground on two by fours, how long can a drum last, siphoning out of it once a week or two and capping it back up?
it will prolly last about a week, but by then it mighta went down to 105 or something, just do what i do!! dont use it!! lol
I had a friend tell me that he had an idea of putting nitrogen or co2 as a gas barrier after the drum was opened. I'm not sure if this would help / work or not.
Be careful with high octane gas. I wouldn't use anything that's much over 102 in anything that has titanium valves (new Hondas?).
Because of some strict racing regulations, you cannot use gas over certain octane in some races. Because of that, race gas manufacturers have made oxygenated lower octane fuels that end up producing MORE HP than the higher octane stuff.
Just some food for thought.
Oh yeah, Check out all the VP literature on the different fuels they make. You'll go "WOW"
Because of some strict racing regulations, you cannot use gas over certain octane in some races. Because of that, race gas manufacturers have made oxygenated lower octane fuels that end up producing MORE HP than the higher octane stuff.
Just some food for thought.
Oh yeah, Check out all the VP literature on the different fuels they make. You'll go "WOW"
| QUOTE (Thelast929 @ Feb 16 2004, 10:23 PM) |
| I wouldn't use anything that's much over 102 in anything that has titanium valves (new Hondas?). |
It's a 2-stroke...
| QUOTE (Shovel Boy @ Feb 16 2004, 07:02 PM) |
| it will prolly last about a week, but by then it mighta went down to 105 or something, just do what i do!! dont use it!! lol |
It’s not that bad! It will degrade over time but you will loose the nice quick throttle response way before the octane goes down any significant amount. If you store the drum in a cool dark place and reseal it after every use it should last at least 6 months before you have to worry about it. And if you don’t use it all in that time for some reason you can still use it but you’ll have to increase your race to pump ratio.
The whole not using if it’s been sitting longer than a week is if it’s already been mixed with oil and that goes for any gas not just high octane. I usually try not to use it if it’s been in the bike or jug longer than 2 weeks as long as I freshen it up with at least a half tank of new (and shake like mad).
Just DON’T store it anywhere the sun can get to it!
Oh, and don’t set it next to the gas water heater in the garage!
you dfont need race gas unless u raised ur compression ratio dont waste money
| QUOTE (bansheen250r @ Feb 16 2004, 11:03 PM) |
| you dfont need race gas unless u raised ur compression ratio dont waste money |
He had engine work done that requires 100 octane (per the engine builder).
Union 76 used to sell 100 octane at the pump in some select gas stations. IIRC, it was about $3/gal when gas was around $1.50/gal. You might want to see if there is a station near you that still does this. That would solve several problems...storage, mixing, large quantity purchase/storage hassles.
I've heard that Union 76 story, but have yet to find one that actually sells the stuff. Probably not in L.A. County . . .
| QUOTE (South Bay @ Feb 17 2004, 08:45 AM) |
| I've heard that Union 76 story, but have yet to find one that actually sells the stuff. Probably not in L.A. County . . . |
It's more than a story...I actually put some in my jetski in a Las Vegas area one back in about 98ish...right out of the pump. I haven't had the need since about that time, so I don't know whether they still do it or not...
| QUOTE (BeachHead @ Feb 17 2004, 07:07 AM) |
| Union 76 used to sell 100 octane at the pump in some select gas stations. IIRC, it was about $3/gal when gas was around $1.50/gal. You might want to see if there is a station near you that still does this. That would solve several problems...storage, mixing, large quantity purchase/storage hassles. |
There's a place that sells Velocity race gas out of the pump around here...I think it's 104 octane. SD folks that care, it's right off the Mollison exit of the 8 passing through El Cajon.
union 76 still sells race gas at the pump in the vegas area... everytime i go up there the gas station down the street from where im at has it... 
Just so ya know... not that it helps any of ya'all out or anything..
Just so ya know... not that it helps any of ya'all out or anything..
The drum I've ordered is 76 110 octane. Unocal (Now just 76) doesn't make it any more. This stuff was bought up by a wholesaler. I am buying it for $210 in a 55 gallon drum. Works out to $3.81 a gallon. If I can get away with it lasting 3-4 months that will be fine. I'll blow through the 55 gallons in maybe 2-3 months during the season.
Bansheen250R: The base of my cylinder was turned down to raise the compression and change port timing. The bike pings on straight 91 down the drags so I need more octane.
This will be strictly for my CR500AF. The banshee still runs on 91 just fine and that's what she gets.
Bansheen250R: The base of my cylinder was turned down to raise the compression and change port timing. The bike pings on straight 91 down the drags so I need more octane.
This will be strictly for my CR500AF. The banshee still runs on 91 just fine and that's what she gets.
Small airports.
If you have a small airport around you they will have 100 octane fuel. The small prop job planes use it. Not as expensive as race fuel.
Rob
In the San Fernando Valley (Los Angeles) you can still get TRICK 100 at De Soto and Vanowen. The union 76 just off the 101 west of Valley Circle also has race gas from the pump. The TRICK is about $5/gal and I'm not sure what the 76 goes for.
sorry, I missed the 2-stroke part of the post 
sorry, I missed the 2-stroke part of the post
| QUOTE (Fireballsocal @ Feb 17 2004, 05:25 PM) |
| The drum I've ordered is 76 110 octane. Unocal (Now just 76) doesn't make it any more. This stuff was bought up by a wholesaler. I am buying it for $210 in a 55 gallon drum. Works out to $3.81 a gallon. If I can get away with it lasting 3-4 months that will be fine. I'll blow through the 55 gallons in maybe 2-3 months during the season. Bansheen250R: The base of my cylinder was turned down to raise the compression and change port timing. The bike pings on straight 91 down the drags so I need more octane. This will be strictly for my CR500AF. The banshee still runs on 91 just fine and that's what she gets. |
Canyou get anymore of those drums? I am getting ready to buy a drum of 110 in the next week or so, and that price seems quite appealing. The best price I have found so far is for vp c12, at $293 a drum.
Just call VP. Their 55 gallon drums will probably work out to about $4 a gallon.
76 doesn't make race gas anymore. I heard they lost their Nascar contract.
Ben, I've been running a 50/50 mix on my raised compression top end for years. Never pings. I even use gas that is a month old that's been mixed.....just freshen it up with some new mixed gas. The thing you have to worry about when mixed gas sits is that Octane (being alcohol based...I think LOL) with start to break down the oil in the fuel.
76 doesn't make race gas anymore. I heard they lost their Nascar contract.
Ben, I've been running a 50/50 mix on my raised compression top end for years. Never pings. I even use gas that is a month old that's been mixed.....just freshen it up with some new mixed gas. The thing you have to worry about when mixed gas sits is that Octane (being alcohol based...I think LOL) with start to break down the oil in the fuel.
| QUOTE (BamBam @ Feb 19 2004, 07:21 PM) |
| Just call VP. Their 55 gallon drums will probably work out to about $4 a gallon. 76 doesn't make race gas anymore. I heard they lost their Nascar contract. Ben, I've been running a 50/50 mix on my raised compression top end for years. Never pings. I even use gas that is a month old that's been mixed.....just freshen it up with some new mixed gas. The thing you have to worry about when mixed gas sits is that Octane (being alcohol based...I think LOL) with start to break down the oil in the fuel. |
I wish! I called them, and they gaveme there local distributor, and he told me $375 for a drum!
So, I got it from vw paradise for $300.
Hmm, that's a little high.
I have to run race fuel in my quad as well, because of the work that has been done on it. I just go to the 76 Station and they sell it there for $3.79 a gallon.
Thanks for the info you guys!!
Thanks for the info you guys!!
buy it in bulk...its cheaper. and mixing pump and race gas won't hurt anything.
| QUOTE (BamBam @ Feb 21 2004, 08:36 AM) |
| Hmm, that's a little high. |
If you know where to buy c12 cheaper, please show me. I'm all ears. I called around quite a bit last week, and the best price I found was $300.
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