cus_deluxe
Commie Satan turd
I saw a saw on alcohol AND a pipe once. Dunno what the compression was tho.
honestly that thing has way more compression than it needs. never checked it.
I saw a saw on alcohol AND a pipe once. Dunno what the compression was tho.
ive seen time after time, vids of people disproving the idea that “race gas makes a stock engine faster”. seat of the pants feel is not a replacement for a stopwatch.
I’m guessing your high octane fuel is oxygenated. To get it to run properly, you’d need to open the screws enough to compensate for that. The saw needs 14.6 parts of oxygen to 1 part gas, and doesn't care which orifice it travels through.Maybe I was wearing thinner pants, yes that must be it!
I’m guessing your high octane fuel is oxygenated. To get it to run properly, you’d need to open the screws enough to compensate for that. The saw needs 14.6 parts of oxygen to 1 part gas, and doesn't care which orifice it travels through.
must be magic, cuz that sure doesnt jive with the science. now maybe on a saw that comes from the factory with higher than “normal” compression (typical with some dolmars it seems) then you MAY see a slight increase in “power”. but id bet the farm that you wouldnt notice anything significant running hi octane fuel.
In the motocross world 50cc bikes with high compression run race fuel up to 110 octane. Just thought it may cross over to the 50cc chainsaw world. I have ran VP U4.4 (105 octane) in my saws and have noticed an increase in power and torque over 93 pump gas, in a stock saw. Quicker revs and it doesn't bog as much under a load ether.
And morphed it has. The question was simply which of the two would you choose. Slightly higher efficiency with the higher comp or more displacement with the big bore kit.My question to the OP was an honest desire to know what he wanted/needed, and what he expected to gain by the mods he was talking about.
If you didn’t adjust the screws, your saw is running leaner due to the added oxygen. That’s why it ran fasterYes VP U4.4 is oxygenated fuel. But I changed nothing on the fuel settings.
Says it's 7.50 oxygenated.
VP fuel charts for all there motorcycle and ATV racing fuels as of 2019
The last time I used it was 2015 and the color was blue, (now it's green) there may have been more changes since 2015
https://vpracingfuels.com/master-fuel-tables/#fuel-tables
VP chart sheet for U4.4REG
https://3m5311q30z3nqc7x1a69xidu-wp...oads/2019/12/U4_4-REG-Spec-Sheets_100419A.pdf
They only list U4.4 REG vs. U4.4 that I was using back then.
When I started using VP fuel it was U4, then they changed it to U4.2, then changed it again to U4.4. It seems they have once again changed to U4.4 REG
What would be your choice to pep up a 357xp? One or the other. A 47mm big bore kit or a higher comp piston.
Joe
Raising compression raises torque. Raising octane creates less power. Octane is a measurement of a fuel’s resistance to combust. Higher octane fuels burn slower creating less power in a chainsaw.Upping compression and increasing octane creates more power.
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