Race oil.

[mercman440x]

TF 580 is synthetic like I said before it's made locally in Rome ny in small batches not all fancy labels or anything mix ratios are right on the back thanks

[Vintagesleds.com]

[petawawarace]

So if I run 1:32 I should gain a ton of power and get a chicken dinner as well? Hope someone can supply the plugs for me. 

If you can get it to run on that, you'll need to up the compression a few hundred percent. Probly won't need spark plugs, but glow plugs instead.

[AHood]

proper jetting and a good ignition  eliminates almost all fouling even at oil ratios of 20:1 or 25:1  which i consistently run even in my rider.  only time it didnt make it back from a ride is when i sank it in a lake.

[KKWILL]

Running mix ratio's of 20:1 or 25:1 isnt that pretty COSTLY?? I mean whats the reason in running good oil if you have to run such ratio's???

[snowracer]

Only one of ya's got it correct, I said 1:32. More oil, more power!

[AHood]

Running mix ratio's of 20:1 or 25:1 isnt that pretty COSTLY?? I mean whats the reason in running good oil if you have to run such ratio's???

Because the highest specific power engines need it and want it. It makes more power and extends the life of all engine components. It may not make sense in a trail putter but the title was race oil.

I'll give you another example methanol motors have roughly double the fuel flow of a gasoline engine. They still run mix ratios between 25:1 to 32:1.   That equates to 12:1 to 16:1 compared to a gasoline engine. And boy do they run. Ask yourself why that is.  Its not because the guys are rich and they don't care about the cost of the oil.  On the contrary they care very much about the cost of their engines. Which may be astronomical compared to bolting together an engine for a vintage rider.
Engines like oil don't deprive them....

[_FIII]

I talked to an engine builder near me and he said it shows on the dyno that more oil means less friction = more hp.

Winner winner chicken dinner.

Had my dads stock 1977 SKI-DOO RV 340 rotary motor on the dyno two years ago. We got it as good as we could with jetting and ignition timing on my 50:1 mixture. My dyno guy says we should try a different oil ratio. We worked down to 20:1 and saw a gain of 2.8hp from my original 50:1. I'm not smart enough to know why but my dyno sheets say that's the sweet spot for this particular motor.

[VintageElanGuy]

I talked to an engine builder near me and he said it shows on the dyno that more oil means less friction = more hp.

Winner winner chicken dinner.

Had my dads stock 1977 SKI-DOO RV 340 rotary motor on the dyno two years ago. We got it as good as we could with jetting and ignition timing on my 50:1 mixture. My dyno guy says we should try a different oil ratio. We worked down to 20:1 and saw a gain of 2.8hp from my original 50:1. I'm not smart enough to know why but my dyno sheets say that's the sweet spot for this particular motor.

When you went from 50/1 to 20/1, did you change the jetting at all?

[AllenJ]

Exactly FIII.  Oil =power in a 2 stroke. and yes a jetting change maybe required.

[redbastrd]

I will be the oddball here. Nobody has mentioned Schaeffers Oil. I have used it for years with great results mixed at 40:1

[Ski of Plenty]

I talked to an engine builder near me and he said it shows on the dyno that more oil means less friction = more hp.

Winner winner chicken dinner.

Had my dads stock 1977 SKI-DOO RV 340 rotary motor on the dyno two years ago. We got it as good as we could with jetting and ignition timing on my 50:1 mixture. My dyno guy says we should try a different oil ratio. We worked down to 20:1 and saw a gain of 2.8hp from my original 50:1. I'm not smart enough to know why but my dyno sheets say that's the sweet spot for this particular motor.

When you went from 50/1 to 20/1, did you change the jetting at all?

Not only less friction but the additional oil in a higher performance engine with tighter squish tolerance would equal more BTUs in that mixture. If jetted and timed correctly that would add some extra power.

[snowracer]

Now wouldn't less friction equate to less heat and more BTU's mean more heat? Just asking. 

[Reimond]

Motul 800 with ester

[AHood]

Now wouldn't less friction equate to less heat and more BTU's mean more heat? Just asking. 

yeah.  heat from friction can not be recovered.  heat from oxidizing more "fuel" can be or at least partially recovered.

[popatopracing86]

Who ever runs 100to 1 or 72/1 is leaving a ton on the table  there is not a fat chance that 72/1 is gona make as much power as 20/1   In the same motor.