[Fot] SU HS6 problems during hard braking

Phil Gott vfracing at aol.com
Sat Jul 13 19:15:43 MDT 2019


Jason;
What sort of Fuel pressure are you running? Should be 1 1/2 to 3 psi, although a Spitfire driver and I run 6 with no apparent ill effect. More than that could be causing you some of this problem.
Phil Gott

Sent from my iPhone

> On Jul 13, 2019, at 8:57 PM, Jason Sukey via Fot <fot at autox.team.net> wrote:
> 
> Hello FOT,
>      Running my GT6 at the PVGP historics this weekend.  I've sorted the braking system and installed new tires since the last time out.  Now that I'm actually able to brake hard, I'm suffering from what seems to be fuel flooding, possible sloshing in the float bowls and dumping out the jet into the intake...
> 
> During and immediately after a hard braking zone, the engine goes completely "off" and I can smell raw fuel.  After a few seconds it clears out and runs strong in all other conditions, no indication of over rich or starving for fuel. Starts normally, no issues idling.
> 
> Original fuel level in the floats was about 1/8" below the top of the jet.  By reducing the fuel level in the bowls from there, the problem has somewhat improved, but it's still significant.  Every session I adjust them a little further, but I'm not sure this is the right fix...maybe a band aid.
> 
> Has anyone experienced this with the HS carbs?  
> 
> Jason Sukey
> 
> 
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