A stock B28E engine puts out 156bhp. This is the euro-spec engine the DeLorean would have had, should it have ever been sold in Europe. Not entirely sure where the 170bhp figure came from - although interestingly it is the output of the subsequent B280E engine (EFI) that came out in 1985 or so.

Jim was right with the different parts on the B28E - aside from the cams. We've compared them - they're the same as on the B28F.

From various dyno runs of cars in the UK with varying specs, it would seem that losing the cat and going to a freeflow exhaust can liberate perhaps 15bhp and adding the Volvo fuelling adds 5bhp. The higher compression is responsible for another 5-10bhp if you're lucky.