Octane for 450R
#1
02-25-2006, 12:44 AM
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Octane for 450R
Can anyone tell me the best octane rating for a stock 05 TRX450R minus the baffle at around 5000 ft. elevation? I'm mixing 111 octane VP race fuel with 91- 93 octane pump gas, I will play around with different octane levels after I install my HRC kit and my new exhaust, I was just wondering if anyone had any idea what runs best stock.
#3
02-27-2006, 08:52 AM
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#5
02-27-2006, 03:16 PM
Red Rider
Honda, accept nothing less!
Honda, accept nothing less!
Octane for 450R
Manual specs 91. I bump that up a little with Klotz Octane Booster for a bit of insurance against detonation. The Klotz also has some other nice features like an ester synthetic lubricant for the top end, fuel preservative (up to 1 year!), and it absorbs any moisture that is in the fuel.
Absolutely don't run 89! Detonation in this engine will have devastating consequences!!!
Absolutely don't run 89! Detonation in this engine will have devastating consequences!!!
#6
02-27-2006, 04:30 PM
Octane for 450R
Can anyone tell me the best octane rating for a stock 05 TRX450R minus the baffle at around 5000 ft. elevation? I'm mixing 111 octane VP race fuel with 91- 93 octane pump gas, I will play around with different octane levels after I install my HRC kit and my new exhaust, I was just wondering if anyone had any idea what runs best stock.
#7
02-27-2006, 05:42 PM
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#8
02-28-2006, 12:56 AM
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Octane for 450R
I am running the stock 10.5:1 piston. I ran 98 octane in it this weekend and it ran great. I noticed considerable improvement over when i was running 91. After i get my HRC kit and pipe on it i'm switching to a 13:1 piston, then i'll bump it up to about 102 and see how it runs then.
#9
03-01-2006, 10:33 PM
#10
03-02-2006, 12:56 AM
Pro Rider
Has been here a long time!
Has been here a long time!
Octane for 450R
Using high octane fuel on a stock compression piston will actually cause a loss of power and needlessly drain your wallet. There is such a misconception out there that dumping race fuel in your bike is going to make you go faster. It will not! Higher octane fuels burn slower than lower octane fuels in order to prevent detonation. You will make best power running the lowest octane you can just before detonation occurs. Raising octane beyond that point only creates a slower burn and thus less power.
Besides compression, cam specs as well as elevation also play a role in octane requirements. The higher you go in elevation the lower octane you can safely get away with.
With that said Fixitman69 should not be running ANY type of race gas at 5000ft elevation on stock piston 450R. Run what your owners manual says you should be running and save your race fuel money for other things.
Besides compression, cam specs as well as elevation also play a role in octane requirements. The higher you go in elevation the lower octane you can safely get away with.
With that said Fixitman69 should not be running ANY type of race gas at 5000ft elevation on stock piston 450R. Run what your owners manual says you should be running and save your race fuel money for other things.