Ian (Now wth ball and chain)   |
| Thu Jun 17, 2004 5:54 pm |
| Re: Nope... |
The 250 engine is a high compression engine.
No one here has ever said anything to the contrary.
BUT, because of the size of the pistons, the length of the stroke, and other matters inside the combustion chamber, high octane fuel IS NOT REQUIRED for a stock engine under typical operating conditions, in most areas, with name brand fuels of good quality.
If your local gas station waters down the gas, or you're climbing a hill with a pair of 200 lbs people on it, in 6th gear, at 40 miles an hour, then yes, that engine will ping, knock, and protest like a mofo.
Normal riding, and even pretty damn spirited riding won't require higher octane.
Porting the heads, changing the pistons, jet kit, pipes, etc will change the characteristics of the engine.
Make the engine run leaner and hotter due to the installation of pods and an exhaust, without rejetting it, and high octane fuel might be the only thing keeping the engine from tearing itself apart.
Ian.
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whats a 91 ex250 suppost to run on 89? or 87? (n/t) — Chris, Thu Jun 17, 2004 6:16 pm -
87 (RON+MON)/2 (US pump octane), 91 RON (n/t) — KarlP, Thu Jun 17, 2004 6:51 pm
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Re: Nope... — paulpaul77, Thu Jun 17, 2004 4:58 pm
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Re: Nope... — Ian, Thu Jun 17, 2004 5:54 pm
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Re: Nope... — paulpaul77, Thu Jun 17, 2004 6:08 pm
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Re: Nope... — BrianM, Thu Jun 17, 2004 6:58 pm
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uugh... — KarlP, Thu Jun 17, 2004 5:39 pm
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It's your money, waste as you see fit.
(n/t) — BrianM, Thu Jun 17, 2004 5:37 pm -
Here we go AGAIN.... — Ken, Fri Jun 18, 2004 4:39 am
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Re: Here we go AGAIN.... — Brett the other one here, Fri Aug 13, 2004 6:41 am