SU carbs problems

[staggering]

Guys - having problems with my SUs.
Firstly, I cannot keep the dashpot oil to the correct level (basically I fill with 20 / 50 and 10 mins later the oil has disappeared (without even running the engine). When I then start the engine there is lots of blue smoke (which doesn't happen if I haven't put oil in the dashpots)
Please could someone advise me of what I have to replace / repair in the SU s to stop this "immediate" loss of dashpot oil into th cylinder bores, many thanks
Secondly, when on a run I have noticed on the "overrun" I get numerous backfires and exhaust popping (not when accelerating, only when in backing off/overrun situations) Is there a chance that this might be related to the lack of oil in the dashpots, i.e. under acceleration the mixture is ok but when backing off / on overrun the SU pistons don't move quickly enough for the reduction in engine revs etc - any help with these two situations would be very welcome, thanks

Kind Regards
Ian

[Dieter H. Marschall]

Hello Ian,

What type of SU carbs did you build in?

Kind regards,
Dieter.

[staggering]

Dieter - they were fitted by the previous owner - I think they are 2 x HF 16 Type, although not sure if I have the numbers right ??, thanks
Ian

[Dieter H. Marschall]

SU Carbs

Hello Ian,

normally there are little tags fitted to the screws holding the domes. What do they say? Pics would be very helpful,Stag HIF6 1.jpg too.

Personally I reckon you have HIF6 carbs installed. I will attache a picture of the ones in my Stag.

Best wishes,
Dieter - from Germany.Stag HIF6 2.jpg

[Peter Hills]

Ian,

You could try contacting Burlen Fuel Systems - who took over all SU carb manufacturing and support. They may be able to advise you. Check the carbs for the numbers Dieter suggests; they'll be necessary for Burlen to help you.

By the way, Burlen's web site gives details of these numbers against applications. I would suspect you have a set of Rover SD1 V8 carbs HIF16's. The Burlen web site also tells you how to service the carbs.

Hope this helps.

Peter

[staggering]

Thanks Peter - I will try the Burlen route - apologies, I should have put in first post that mine is an RV8 in the Stag, so the HIF 16 could be the ones, thanks.

Dieter - great photo - you're installation is a lot neater + they do look very similar to mine, main difference is mine has K&N cone type filters (not the "pancake" type you have) The only numbers I have found on one carb are (on a small ally tab screwed to the side of dashpot) is:FZX1316L-1-W17.

Thanks both of you again

Kind Regards
Ian

[Dieter H. Marschall]

Hello Ian,

So your carbs are the ones from the Rover SD1: SU HIF6 (not 16!). You can get parts from Rimmers, too. See here: http://www.rimmerbros.co.uk/Item--i-FZX1316L

Good luck!
Dieter - from Germany.