Adrian Pettitt

Do you think it’s low compression now with those test results? I wonder if it’s been tweaked a bit. Frankly I was surprised they were that good!

Thanks Peter, I’ll advance it up a bit when I fit the new needles and jets. Cheers Adrian

Hi Alan, there is a photo of my carbs on page 1 of this thread. They are the ones with the K&N filters. I had the pots off yesterday and those numbers were embossed in the casting underneath not on tags. I actually spoke to SU Burlen today. They identified the needles as only being used on the Rover SD1 2600 so we’re assuming that’s where the carbs originated from as well? They confirmed them as HS6. They confirmed the BEP needles are far too rich for a TR6 so I’ve ordered what they recommended. BAG needles, 100 thou jets and yellow springs. it’s a bit of a hotch potch I’m afra

Thanks Niall, is your engine ‘breathed on’ at all?

Hi, sorry to come back to this old thread after quite a while. My TR6 project has been very much on the back burner! I’ve revisited this particular thread as the advice I received from Magnus, Peter and others was brilliant. I wonder if you could help me again please. My TR6 has never run well and felt like it was strangled unless being really rich or assisted with some choke so I’ve gone back to basics. For info my TR has twin HS6 SU’s and potentially an American lower compression head from previous research. I have no idea what vehicle donated the SU’s. The car is not an import. So