[andyjboy]

I'm planning on building a short-stroke twin-plug 2.5 litre engine & have some initial questions. The engine will use high compression (10.3 or higher) pistons, S cams & the twin plug ignition will be supplied by an Andial-converted Bosch twin plug distributor.

Intended use is mainly road + occasional sprints/hillclimbs.

1) What port sizes should I go for - std S or larger ?

2) Should I base the engine on a pair of 7R crankcases or opt for the earlier aluminium crankcases & get all the updates (oil squirters, etc) carried out ?

3) What induction system should I opt for - Webers or mfi ? (I have a complete 2.4S as new mfi set-up, as new Weber 46 IDA's, 2.2E mfi with magnesium stacks ready to be bored out & a set of 40 IDA's)

4) What are the preferred conrods - 2.0 ? 2.2 ?