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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Crf250 Fuel
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[QUOTE="Studboy, post: 843734, member: 26867"] slodsm, there are big differences between a bigblock and a CRF250. The CRF250 has a much shorter intake tract with much less heat for starters, not to mention that it also runs at much higher rpms. In short (this isn't the Rich tech version!) what happens is that a lot of that pump fuel isn't vaporizing completely because of the high temperatures needed because of the distillation curve. This effect occurs more an high RPMs where the time to vaporize isn't as great. The C12 vaporizes more effectively because of it's lower distillation curve (more suited for the application). In your bigblock the intake tract is long and the relative heat is high so it will have more time and heat to fully vaporize the pump fuel. To add another one up for the C12, it is much more consistant than the pump fuel could ever dream of being. Now, I know that I screwed that one up somewhere...I'm sure that Rich will fill in for my mistakes! :) [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Crf250 Fuel
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