I own a 1990 s2 RST running a 2.0 zvh on the original MFI system. It runs fairly well and made 232bhp at 14psi.

I'm thinking about going for EFI and making this upgrade while the car is in the garage over the winter.

I'm not planning on running more boost, just want it to run smoother and be safer for the engine.

I've been thinking about either FRST or COSSIE management and am wondering what the difference is between these two set ups? What benifits does cossie management give over frst?

I'm not very familiar with this conversion so am looking for as much info and advice as possible.

Cheers for your help, Mark