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Off idle is a bit abrupt... SU or linkage ?
- Thread starter DetomasoLee
- Start date
datsfun
Club Member
There was a super nice offering by a member here who designed a "kit". Hopefully he will pipe in soon or look up the search functions
uk66fastback
Club Member
It was 240L31 who developed the cable throttle kit - I had one from him that I still have to fit. Not sure he had any more though ...
OK, I’m going to look at my links now as I’m pretty sure they are worn more than the OP’s 
But FWIW - my first thought was it’s running too lean - when playing with carb needles and tuning, I found the needles with a wide taper at the top part made the car very sensitive to throttle inputs when cruising or at low revs.
It’s worth looking at the tune and making it a half turn richer to see if it makes a difference. But ideally you would do that with a gas analyser (friendly local MOT garage or AFR sensor).
So in summary, yes if the pistons are rising too fast you can have this issue - buy the official SU carb damper oil from Burlen or off eBay for £12 and / or have a quick play with the mix - but make sure you don’t put your carbs out of balance I.e. jets at different heights on each carb.
But FWIW - my first thought was it’s running too lean - when playing with carb needles and tuning, I found the needles with a wide taper at the top part made the car very sensitive to throttle inputs when cruising or at low revs.
It’s worth looking at the tune and making it a half turn richer to see if it makes a difference. But ideally you would do that with a gas analyser (friendly local MOT garage or AFR sensor).
So in summary, yes if the pistons are rising too fast you can have this issue - buy the official SU carb damper oil from Burlen or off eBay for £12 and / or have a quick play with the mix - but make sure you don’t put your carbs out of balance I.e. jets at different heights on each carb.