Posted by James Rumph on July 25, 2010 at 04:17:53 from (96.27.101.101):
In Reply to: gasoline octane.. posted by mike paulson on July 24, 2010 at 12:15:57:
I have to agree with Pete he has a handle on it.
There is a formula that shows the power that any fuel gives off when burned. The higher octane fuels tend to give off lower power numbers due to the way they work "slow".
"Spark knock" pre ignition , you need better fuel or the timing curve reset.
With high octane fuels more timing is required in the motor to get it threw and reep the benefits of it .
Based on this we have tried differnt fuels and timing curves on and in my "M" on the dyno.
Once the cylinder presure starts getting up over 160 or more then fuel is a issue.
In this case if it is a stock tractor then the octane is not needed and may actually hurt the performance.
So in short your good and don't worry.
The only thing that we all have to worry about is todays oil. They are taking more and more "zinc" out of it causing engine failure.
Will it effect our older toys , hard to say.
Do your homework on oils and there zinc content , this is becoming a bigger problem.
GM requires a special oil and or additive in the Corvette motors etc etc etc due to the roller cams wiping out do to not enough zinc in the oil made today.
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