CRF450 Leaded vs NON

[vAnS_77]

I was reading about leaded fuel vs unleaded, about 1 hour of reading and BAIS opinions everywhere. I need to know what is the best type of fuel to run in my CRF450 HYBRID with 12:5:1 comp. I can get 110 TORCO at my local BP @ 5.75 a gallon. Thanks.

[TrX450Rfreek]

i would run 110 at least i prolly would never run pump gas
when i get a fourstroke all i will run is 110
my friend runs 114 in his kxf250
ive seen wat happens when u run a 4stroke on pump gas not pretty

[400exrider707]

Originally posted by TrX450Rfreek
i would run 110 at least i prolly would never run pump gas
when i get a fourstroke all i will run is 110
my friend runs 114 in his kxf250
ive seen wat happens when u run a 4stroke on pump gas not pretty

Please explain this....


Most people run their four strokes on pump gas without issue so to say its not pretty makes no sense at all.




I think you guys are confusing two different things here. Higher octane doesn't mean its leaded. You can get 110+ unleaded and you can get 94 octane leaded if you want.

[Drewltr450]

The reason pump gas is unleaded is cause its worse for the enviornment to burn leaded gas. And also pump gas is 10% ethenal (idk how to spell it but you know what im talking about). Race gas im pretty sure is 100% gas

[bwamos]

Originally posted by Drewltr450
The reason pump gas is unleaded is cause its worse for the enviornment to burn leaded gas. And also pump gas is 10% ethenal (idk how to spell it but you know what im talking about). Race gas im pretty sure is 100% gas

No ethanol in the gasoline in Missouri.

Besides ethanol increases your octane rating. Some states use it in their blend in lieu of alkalites (sp?) to regulate the octane rating. Every state uses a different fuel blend. Bureaucracy at its finest. ;)

At 12.5:1 on a 450r (assuming you are in a normal dynamic compression range) you don't need 110 octane. I'd say around 100 should be more than fine. Heck 93 might be even be ok depending on overlaps, timing, etc.... It works fine at 12:1.

[vAnS_77]

I'm going to mix vp u4.2, with 93 at pump. Thanks guys!

[F-16Guy]

Aside from being worse for the environment, lead deposits can also build up in your engine over time and cause plug fouling and other problems. I think another potential problem with leaded fuel is that it's combustion byproducts are corrosive. Light aircraft that burn leaded fuel (100LL, etc.) use a special type of engine oil that minimizes the effects. If you change your oil on a somewhat regular basis, I doubt that would be much of an issue. Food for thought.

[Thumper1220]

Originally posted by bwamos
No ethanol in the gasoline in Missouri.


At 12.5:1 on a 450r (assuming you are in a normal dynamic compression range) you don't need 110 octane. I'd say around 100 should be more than fine. Heck 93 might be even be ok depending on overlaps, timing, etc.... It works fine at 12:1.

you seem to know what your talking about can you tell me what effect retarding the exhaust cam 3 degrees will accomplish?
I.E. raising the comp. or in the overlap, something idk. any help would be greatly appreciated. :)

[400exrider707]

Originally posted by Thumper1220
you seem to know what your talking about can you tell me what effect retarding the exhaust cam 3 degrees will accomplish?
I.E. raising the comp. or in the overlap, something idk. any help would be greatly appreciated. :)

Where in NY are you from?

[Thumper1220]

Originally posted by 400exrider707
Where in NY are you from?

around otisco lake