01-10-2018, 03:30 PM
Hi JonE,
I've done a couple of these, one being a Reliant downdraught type. The only extra thing I did was to hacksaw down to the manifold stud holes either side of the inlet ports. I did hear a while back that on flow testing, the restriction in the cross over part of the side valve engine was such that the other parts, including the eye in the inlet flange, didn't cause any ill effect. Matching ports has little effect on oversized ports like the A7. If you want to do something just make sure the downstream side - the block port - is slightly tapered so that any square edge at the join is on the upstream side rather than facing into the airflow.
Hope of use, Dave
I've done a couple of these, one being a Reliant downdraught type. The only extra thing I did was to hacksaw down to the manifold stud holes either side of the inlet ports. I did hear a while back that on flow testing, the restriction in the cross over part of the side valve engine was such that the other parts, including the eye in the inlet flange, didn't cause any ill effect. Matching ports has little effect on oversized ports like the A7. If you want to do something just make sure the downstream side - the block port - is slightly tapered so that any square edge at the join is on the upstream side rather than facing into the airflow.
Hope of use, Dave