pewe
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| posted on 11/8/09 at 10:07 AM |
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Carb baffling...
Since I turned my engine N/S from E/W the carb starves momentarily on right hand corners.
I think this is to do with the fact the float chamber is long and narrow so can't cope with the amount of fuel required on sharp right handers.
My first step was to increase the needle-jet so it refreshes faster but that hasn't worked completely.
Does anyone have any suggestions please as to how to overcome this problem?
I was thinking that maybe it's possible to baffle the float chamber internally (if space allows) so it reduces the surge when cornering.
BTW it uses a high pressure pump as standard so that's not an option.
Thanks in anticipation.
Cheers, Pewe 
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Guinness
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| posted on 11/8/09 at 10:17 AM |
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Could you "adjust" the inlet manifold to increase the angle of the carbs? In effect tipping them up? So more fuel stays at the right
end?
?
Mike
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Mr Whippy
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| posted on 11/8/09 at 10:20 AM |
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can't say I've ever seen any problems with carbs at high bank angles, even in the landys etc more likely to be the fuel tank pickup
sucking in air.
Fame is when your old car is plastered all over the internet
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Mr Whippy
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| posted on 11/8/09 at 10:23 AM |
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quote:
Originally posted by Guinness
Could you "adjust" the inlet manifold to increase the angle of the carbs? In effect tipping them up? So more fuel stays at the right
end?
?
Mike
actually easier just to fit a tapered/wedge shaped spacer under the carb.
Fame is when your old car is plastered all over the internet
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James
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| posted on 11/8/09 at 10:25 AM |
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If it is the carb as opposed to Whippy's suggestion or anything else, how about fitting a small piece of fuel tank baffling foam.
Fozzy has it in her tank.
That might be easier than fitting solid baffles etc.
HTH,
James
------------------------------------------------------------------------------------------------------------
"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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Xtreme Kermit
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| posted on 11/8/09 at 12:50 PM |
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fundamental question - but are your float heights ok?
If the level is low in the float chamber, you could get starvation under load/cornering.
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pewe
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| posted on 11/8/09 at 07:34 PM |
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Thanks for the replies, guys.
Reckon the tank foam and/or angling the carb sounds worth a look.
Good thought about float height but reckon it's OK - at least according to the info I've found on-line.
Cheers, Pewe
Thanks, Fozzie. I'll look at tank end once all carb issues resolved ATB Pewe
[Edited on 12/8/09 by pewe]
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Fozzie
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| posted on 12/8/09 at 06:41 PM |
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I think, I would look more toward the fuel tank side of things first.
Firstly, is your pick-up pipe located low and to the side?
If it is a bit short on the inside of the tank, this could be your problem.
I do not think your problem is carb end 
So.....As James rightly said, I have 'foam' in my tank.
Stops corner 'surge' and 'starvation'......
I fitted it when I made my tank....so you do need access.
I just googled this.....(I don't know the company) .... tank foam linky
HTH Fozzie 
Edited to add..... I would advise getting the intermittent 'starvation' problem sorted as soon as possible, as it could potentially damage
your engine .... 
[Edited on 12-8-09 by Fozzie]
'Racing is Life!...anything before or after is just waiting'....Steve McQueen
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les
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| posted on 15/8/09 at 08:45 PM |
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i have this problem in left hand corners-
R1 CARBS on the right hand side of the engine (zetec).
I am pretty sure its not the tank end as I have fitted a swirl pot set up. I have increased the angle of the carbs, but have to wait for the next
track day to try it
(cant reproduce it on the road)
would be v interested if you find a solution. how would I check the float levels?
les
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