[TR] TR4A - OK, so this is weird..

[Tony Drews]

I think it's a sudden richness issue too.  Fuel sloshes in such a way 
that the float drops, fuel level rises suddenly, now it's pouring out 
of the jet tube and the car runs funny.  Since the fuel line is under 
pressure it can happen very quickly.  I think you'd need a big load 
to block the vent into the float bowl.  We put in EGT gauge to figure 
out what was going on, but it's been so long ago that I don't 
remember how they acted.  Actually I think we figured out the problem 
before putting in the EGT's anyway.

Cheers, Tony Drews.

At 04:15 PM 12/15/2014, Mark J Bradakis wrote:
>Back when I was the VTR Autocross Advisor I had someone call me 
>about this problem. He was having a little
>trouble visualising the float geometry I was trying to explain to 
>him. But yes, having fore - aft float
>orientation rather than side to side virtually eliminates it.
>
>As I recall my theory back then was that the sloshing of the fuel 
>covered a vent hole, so if the needle
>valve was closed and the vent momentarily blocked there was no way 
>for the fuel to get out because no air
>could get in. But since then I've gone to the sudden richness theory.
>
>mjb.
>
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