Oh sorry trotter, I'm in New Zealand :) Also ordered a BFM needle, yellow spring, and proper damper oil direct from Burlen, which are now fitted and made no difference. As I was informed all the recommended needles BDL, BFM, BBZ are so close together that the engine should run fine on any of them an...

HIF6 is basically identical to the HIF44, its just measured in the old 1inch + X/8ths sizing (ie 1-6/8th or 1-3/4 = 44.4mm :) ) Yup have read that thread plenty of times along with any other tuning guides for SUs I can find. Have owned 2 cars with BMC engines and never had a problem tuning either, t...

Very cliche, but long time reader first time poster :) So a quick background, I brought my SJ as a blank canvas, rolling body with nothing in the engine bay. Already intrigued by the SU conversion, it happened that the G16 engine I picked up for it already had an SU on it but had 'carb problems'. Wh...