UK Karting - Notice Board (2-Stroke Karting) : Explanation

Notice Board (2-Stroke Karting)

Explanation
Posted by 'itpro' on 13 Aug 2010 @ 12:42

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itproJoined: August 2001
Total Posts: 6
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Top feed is UNDOUBTABLY the best! Make sure the 'dangly pipe' remains FLEXIBLE!

When cornering hard, you will take somewhere between 1g and 3g assuming there are NO bumps which can raise the 'g' to 5 or 6.

At 1g, the fuel would sit at 45 degrees in the tank..... at 3g it's up at around 68 degrees...... Hit a bump and it's at the TOP of the fuel tank with NONE on the bottom.....

So.... if you have a bottom feed tank and are only half full....... guess what the fuel is doing.....!

A top-feed tank has 'weight' (sometimes called a 'clunk' from the word 'clunk-tank') on the pick up pipe which suffers and moves in EXACTLY the same way as the fuel does..... if the fuel 'sloshes' to the right, so does the clunk.... if it shoots forward under braking.... so does the clunk.... and so on.....

Now you can see why there is NO contest.... botton feed is CR*P! With complex and subtle 'valving' and multiple pick up points, bottom feed CAN be made to work.... but it's DIFFICULT!

If you MUST use bottom-feed..... lose weight and FILL the tank to the top!

Ian

Message Thread:

Fuel Starvation? by 'poddy' (11 Aug 2010 @ 19:32)

Re: Fuel Starvation? by 'Attack2001' (11 Aug 2010 @ 20:59)

Re: Fuel Starvation? by 'iant' (11 Aug 2010 @ 21:07)

Re: Fuel Starvation? by 'HigginsRally' (11 Aug 2010 @ 21:20)

Re: Fuel Starvation? by 'colingray' (11 Aug 2010 @ 21:34)

Re: Fuel Starvation? by 'Liam' (11 Aug 2010 @ 22:17)

Re: Fuel Starvation? by 'poddy' (12 Aug 2010 @ 8:21)

Explanation by 'itpro' << You are here!

Re: Explanation by 'davidmc' (13 Aug 2010 @ 13:35)

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