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SU Carbs - Needle and Seat
- Thread starter RonR
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I have had leakage with the Gross jets. I use the Viton tipped needles now.
Bob_Spidell
Yoda
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I put Grose Jets in my BJ8 probably 30 years ago; they've worked flawlessly ever since. While trying to diagnose a fuel delivery problem--eventually found to be caused by a pinhole leak in the tank pickup tube--I tried a couple sets of GJs and they both stuck closed intermittently. Word has it the company was sold at some point and quality went into the loo. I have no idea what the current state is; you could try a set and maybe get lucky. Or not.
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Sorry. That was years ago. I don't recall.
Wouldn't you get gas overflow from the fuel bowls?
Recently rebuilt carbs and converted them back from fully functional gross jets to the newer Viton-tipped needles. Made float adjustment and consequently carb adjustments easier. Gross jets seemed to make the carbs run richer due to difficult float adjustment. Gonzo
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IIRC, the fuel bowl overflows are higher than the top of the carb jets, so the engine would flood instead, or fuel would run out the intake manifold drains.