661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[bwalker]

Its not pavement

I am well aware of what hill climbing is like because I have done it...
For grins look up the distillation curve for av gas and that for one of vp's two stroke specific mx fuels. You.will.ntice some rather large differance in the low boiling points between the two.

 

[Mastermind]

It is my understanding that AV gas is for planes only.......

But much of what I thought I knew is coming unraveled.

 

[bwalker]

I would like to see the test ran with a carbed saw that is tuned for the fastest cut in the wood with each ratio. It still would have a ton of variable, but would be better.

 

[porsche965]

Can you do this test for us all bwalker? I'd like to see it.

 

[bwalker]

Can you do this test for us all bwalker? I'd like to see it.

I could....

 

[bikemike]

Where do you notice throttle response is slow for these bikes. Like i said hillclimbs. Wish i had vids of my old bike in action at the nationals

I am well aware of what hill climbing is like because I have done it...
For grins look up the distillation curve for av gas and that for one of vp's two stroke specific mx fuels. You.will.ntice some rather large differance in the low boiling points between the two.

So is the av gas the high boil point do the less pressure at elevation? I know i have good luck with it at the katocycleclub nationals and my bike took 3rd over all in redwing 450cc and under singles.

 

[bikemike]

Where do you notice throttle response is slow for these bikes. Like i said hillclimbs. Wish i had vids of my old bike in action at the nationals

So is the av gas the high boil point do the less pressure at elevation? I know i have good luck with it at the katocycleclub nationals and my bike took 3rd over all in redwing 450cc and under singles.

Guess what i was getting at is a high octane that dont ash up like cool blue 110 and other track fuels.

 

[mdavlee]

Interesting conversation with the belray tech.

 

[Marshy]

I hear acetone is an effective octane booster.

 

[bwalker]

Where do you notice throttle response is slow for these bikes. Like i said hillclimbs. Wish i had vids of my old bike in action at the nationals

So is the av gas the high boil point do the less pressure at elevation? I know i have good luck with it at the katocycleclub nationals and my bike took 3rd over all in redwing 450cc and under singles.

A fuel designed for a two cycle application like mx will have low end boiling points much lower than avgas. Avgas has the higher boiling points because throttle response isn't an issue, but vapor lock is.

 

[Outlaw5.0]

It is my understanding that AV gas is for planes only.......

But much of what I thought I knew is coming unraveled.

You are correct, its a high attitude burn rate deal. Many people still use it in their cars...............and many burn up their motor's.

 

[bwalker]

You are correct, its a high attitude burn rate deal. Many people still use it in their cars...............and many burn up their motor's.

BS. When I lived in the CA bush and all we could get was avgas we ran it everything from outboards to four wheelers to trucks. Will poison cat converters very fast.

 

[bikemike]

A fuel designed for a two cycle application like mx will have low end boiling points much lower than avgas. Avgas has the higher boiling points because throttle response isn't an issue, but vapor lock is.

Av gas is used in 2 and 4 stroke engines the rotax is a major part of the small personal aircraft feild for ultra lights and and small kit sport planes

 

[bwalker]

Av gas is used in 2 and 4 stroke engines the rotax is a major part of the small personal aircraft feild for ultra lights and and small kit sport planes

True, but there are also operated at steady throttle, so response isn't an issue.

 

[Trx250r180]

I have heard it is made for up in the sky also ,so have not run it .

 

[bwalker]

If some one sends me a email I will post pictures of that H1R piston I have.

 

[bwalker]

I have heard it is made for up in the sky also ,so have not run it .

You can run it just fine, it just feels alittle dead when on and off the throttle.

 

[bikemike]

I have heard it is made for up in the sky also ,so have not run it .

I just know that i have run it in a 2 cycle it wasnt run for long periods but it did make plenty of power for the 3 minutes the bike ran for warm up hole shots and race on the hill

 

[flyinghunter]

I don't understand how oil can lower octane rating if a diesel motor (all oil) can run compression of over 20:1. Is 2 cycle oil in some way different?

If adding gas to oil raised the octane, you could safely add gas to diesel (don't try this at home!!!).

Diesel octane is quite low, can't remember off the top of my head but around 60? Burns as it's hitting the hot compressed air.

 

[flyinghunter]

Where do you notice throttle response is slow for these bikes. Like i said hillclimbs. Wish i had vids of my old bike in action at the nationals

So is the av gas the high boil point do the less pressure at elevation? I know i have good luck with it at the katocycleclub nationals and my bike took 3rd over all in redwing 450cc and under singles.

Yes. Boiling point lowers with less air pressure.