FUEL vapourisation -- ilustrations
 

Hi ppl

I've read a lot about fuel vapourisation and how to avoid it, but i'm having problems understanding it. It's because i can't understand some of the technical language applied. Do you know any site with drawings or photographs illustrating it!
thank you

GPais
KTM "DesertFox" Adventure r

Are you talking about vapor lock?

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A.B.
www.ShortWheelbase.com

My understanding is that the fuel vapourises in the the transparent fuel filter due to the heat and hence cannot reach the carb in this form, or prevents the flow of liquid fuel. I wrapped my fuel filter in aluminium foil tape to refelct the heat and never experienced a problem with fuel in three months in NW Africa.

Hi,

Usually a vapour-lock will only happen when you have a fuel-pump.
This is becourse a fuelpump can not (or very difficult) pump air (or vapour).

Most of the time it happens when your speed is low (no cooling air). The fule become's hot. So hot it strat's to vapourise and create's bubbles in the fuel-line and pump. When it happens, just put a wet cloth on the fuel-line and pump. Wait a bit and the problem is (usually) solved.

When you have a car and a diesel-engine... you are in a bit more trouble, but since most of us drive bike's... and most bike's don't run on diesel... it's not a major problem.

Maarten

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- www.maartensworld.tmfweb.nl -

Thanks....

Actually vapor lock can happen in the carb without a fuel pump in very hot conditions. Happened to a friend of mine in the Pharaohs Rally a few years back. He made a makeshift air baffle to redirect the hot air passing through the cylinder head away from the carb and the bikes worked fine.

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A.B.

OasisPhoto.com – Images from the Magical Sahara.
ShortWheelbase.com – Jeep preparations.