Went by a local gas station the other day and seen that this gas station is selling 110 octane racing fuel at the pump for $8.50 a gallon. Never seen that before at any any gas station but probably never looked that hard cause too busy buying the cheap 87 non-ethanol octane. Does or has anyone ever tried this high octane fuel in a stock clone engine or is this fuel considered to be the same as alky? Don't know if i should try it it my stock predator engine or wait till i get my current hemi predator with ss valves installed built and see what kinda performance the results will be. Any comments anyone ? ?
We were replying to the thread starter in his question regarding a stock clone engine. Even with those stainless valves installed, unless you are increasing the engine's compression (milling the head, domed piston, i.e. decreasing the cc capacity of the combustion chamber to increase compression, you will NOT see any performance gains.
i put vp racing gas in it once but that was before i milled the head and put in the f grind cam didnt seem to do much performance wise but it did seem to run better will have to try again .but in my professional opinion higher octane gas is better allows higher compression and more timing.
Yes, exactly-that is what the higher octane is for. With a
high-compression engine, you will actually
need it to prevent knocking. We were referring to the common misunderstanding that using high octane gas in
stock, mid compression engines
(or in the case of older flat head engines, like Briggs & Stratton or Tecumseh, pretty low compression) engines) results in any type of performance gain-
it absolutely and unequivocally does not. I think part what makes the high octane attractive to these people trying higher octane with the stock engines stems from the (mis)belief of "you get what you pay for" and higher octane being more expensive, it MUST be better .
ut:
From the Wikipedia entry ON
http://en.wikipedia.org/wiki/Octane_rating
"Octane rating or octane number is a standard measure of the performance of an engine or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating (igniting). In broad terms, fuels with a higher octane rating are used in high performance petrol engines that require higher compression ratios."
ALSO: "Many high-performance engines are designed to operate with a high maximum compression, and thus demand fuels of higher octane. A common misconception is that power output or fuel efficiency can be improved by burning fuel of higher octane than that specified by the engine manufacturer. The power output of an engine depends in part on the energy density of the fuel being burnt. Fuels of different octane ratings may have similar densities, but because switching to a higher octane fuel does not add more hydrocarbon content or oxygen, the engine cannot develop more power."
Hope that clarifies it a bit... :thumbsup: High octane gas sure does smell good though..... lol. :laugh: