96 vmax. difference running regular or premium?

Y

yankeeslover

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Hello, thanks for the help, one last question for the board(for now) will I notice a difference in running 87 octane compared to 93 octaine? as far as I know, nothing special done to sled, as far as jets...Im in upstate Ny, and its all 10% ethanol..I have been running 93, but wondering if its waste of money, and if 87 is the same..thanks, Pete
 
in short.......

Pete that sled requires 88 octane(so says the manual)so just run 89 and call it a day buddy..if gas gets back up to $4 then you could run 87 yes.
 
I alternate between reg and premium on fill ups sometimes. Depends on town really. Poorer town I shy away from premium, as it gets old and you lose the benefit of higher octane.
 
i've read in a sled magazine a couple weeks ago, can't exactly remember what mag it was, but if your sleds manual says to burn 87 or what ever it is, that using say, premium or supreme, will decrease your hp by about .75-1hp i think, not much, im going by what i read in the magazine, thats just what they said, i dunno if its true or not.
 
bravo-guy said:
i've read in a sled magazine a couple weeks ago, can't exactly remember what mag it was, but if your sleds manual says to burn 87 or what ever it is, that using say, premium or supreme, will decrease your hp by about .75-1hp i think, not much, im going by what i read in the magazine, thats just what they said, i dunno if its true or not.
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using gas other than what your sled or vehicle is designed for is a waste of money.
 
daman said:
yup...
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And it is true that unless the CR is high enough to benefit from a higher octane fuel, then you not only are wasting $$, but getting less hp to boot.

It is also true that if you use a premium fuel, that it is much more likely that the gas is older than 87 octane. Gas is hydrophyllic, so the long it sits around, the more chance it has to absorb water, and water can cause engine damage.
 
horkn said:
And it is true that unless the CR is high enough to benefit from a higher octane fuel, then you not only are wasting $$, but getting less hp to boot.

It is also true that if you use a premium fuel, that it is much more likely that the gas is older than 87 octane. Gas is hydrophyllic, so the long it sits around, the more chance it has to absorb water, and water can cause engine damage.
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i my self have not experienced a loss in HP with over octaining but hey
anything is possible..
 
daman said:
i my self have not experienced a loss in HP with over octaining but hey
anything is possible..
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If you have not run it on a dyno you might not notice the loss, but a higher octane fuel ignites slower than a lower ocane fuel, essentially throwing off the ignition cycle.

Only my xc600sp , it has 2 ignition curves. 1 for premium, and one for regular. You get more HP from premium in the premium only key on position, and apparently like 4-5 hp less on regular fuel. 99.9% of the time I run regular, as I have yet to lose to bigger iron even on regular ignition setting with 87 octane. My manual also says that if the fuel is suspect at a station, use the regular ignition setting.
 
horkn said:
If you have not run it on a dyno you might not notice the loss, but a higher octane fuel ignites slower than a lower ocane fuel, essentially throwing off the ignition cycle.

Only my xc600sp , it has 2 ignition curves. 1 for premium, and one for regular. You get more HP from premium in the premium only key on position, and apparently like 4-5 hp less on regular fuel. 99.9% of the time I run regular, as I have yet to lose to bigger iron even on regular ignition setting with 87 octane. My manual also says that if the fuel is suspect at a station, use the regular ignition setting.
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Right..the butt dyno showed zero difference.
 
daman said:
Right..the butt dyno showed zero difference.
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At the moment I an un calibrating my butt dyno with liberal use of Jim Beam Black on the rocks with a splash of coke.


;):D
 
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