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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
Online
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.