BEN99W

@IamScottucus Thanks, that's a very useful answer.

I certainly get what your saying with regard to getting to know the car before changing anything, which is partly my enquiry. I cant get any answer to what specification of engine was used by Birkin. I could have anything from 100 to 160bhp. That's a big variation in a Seven.

Hi Ive recently bought a Birkin that was built in south Africa then exported to Japan and is now in New Zealand. Ive no details about it and wondered if anyone with experience of similar had an idea of the spec Birkin used. It has twin weber 40s with 32mm chokes and a long branch 4 into 1 exhaust which also has a cat which I find strange and is running some sort of Ford engine management via the distributor. Everything looks original on this car, its only done 15k km and hasnt been on the road for 15+ years. Im interested, because Im going to be in the UK shortly, and in a position to pick up some tuning parts if the factory specs were rather lowly. On the other hand, if they used a decent level of kit from the factory, then Ill limit myself to stockpiling consumables. It isnt even on the road yet and Im already anticipating upgrades Thanks in advance. Ben