dhollin3
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| posted on 3/8/07 at 09:37 AM |
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Track day at Mallory Park
Morning all,
I am running a ST Blade which has been jetted at TTS, so the engine is running well. But when cornering around Gerards (a long fast right corner) it
feels as though i have got fuel starvation i.e. no power until i get back onto the straight!!!
Anyone have any ideas why?
Thanks
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Coose
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| posted on 3/8/07 at 09:41 AM |
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No baffles in the tank?
Float heights incorrect?
Spin 'er off Well...
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smart51
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| posted on 3/8/07 at 09:59 AM |
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Was your fuel tank full? Is the fuel tank exit on the right hand side? No? Is your engine carbed? perhaps the float levels are wrong.
Gerrards is one long corner, and a fast one. It will find problems that don't exist on the road. The exhaust side of your engine is on the
outside of the corner, the equivelent on a bike of braking hard on a steep down hill. Perhaps the carbs are not designed to cope. Or perhaps all the
fuel is surging to the wrong end of your fuel tank.
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dhollin3
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| posted on 3/8/07 at 10:05 AM |
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ah ok. I will check to see which side the pipe comes out of the tank.
There are some baffles in the tank which should slow down the transfer.
I will also check the floats.
Thanks
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ned
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| posted on 3/8/07 at 10:38 AM |
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Although not ideal I know people who've fitted a small header/collector tank near the carbs as high as possible on a cec to overcome similar
issues, basically making sure there's always a head of fuel incase of surge issues with the main tank/pickup.
Ned.
beware, I've got yellow skin
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gingerprince
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| posted on 3/8/07 at 11:27 AM |
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Not sure how well it works (though I've never had a starvation issue through cornering), but the tank in my Indy was custom made. It has a
small recess in the bottom before the pickup so it's technically a small "resevoir" that shouldn't be as affected by surge in
a low-fuel situation. Hopefully it holds enough for a long corner 
+-------------------------------------+
|......................................|
|......................................|
|......................................|
|......................................|
|.....+-------------------------------+
|.....| <- resevoir
+----+
| <- pickup
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Hellfire
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| posted on 3/8/07 at 04:37 PM |
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Gerards is known to be one of the most gruelling corners on any race track - with negative camber, medium radius and cornering G's very high -
you will need baffles to stop starvation. BEC's are known to go on this corner too.... this is obviously due to oil surge. Message there
I'd say!
Steve
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