I seem to have tracked down the hot starting problem I've been having on my '65 B18 w/SU's 122.

The car wouldn't start back up after reaching operating temperature and sitting for about five minutes. If I tried restarting immediately, OK. If I waited 15-30 minutes, also OK.

I had two filters on it, pre and post-pump. First removed the post-pump filter, no change. Second replaced the Grose Jet Valves with the old Viton-tipped valves and BINGO! Problem solved. Car still wants to have the throttle opened up at start after reaching temperature but starts with no fuss.

So I'll be buying new OEM float valves in place of the Grose Jets. They sure seem to be a good idea but mine don't seem to seal. Tested with vacuum gauge and they bleed down from 15" in about ten seconds.

I'm guessing that they were bleeding the residual fuel pressure into the carbs and flooding them, causing the restart problem.

Hopefully IPD will work with me concerning these valves, they really didn't perform for me.

Hope this helps someone out there.

-Mario E.

Portland, OR