[cameron.arnott]

Hi guys

I am currently running a 2.4 engine - 70mm crank, 2.2 S pistons, S heads & cams with carbs.

Thinking about going twin plug and using my old 2.2 T heads and wondering if there are any benefits in going any larger than the standard 36/36 for the S porting?

Also is it worth polishing the ports while they are at it or is this only for full race applications?

Lastly any thoughts on facing the heads for a slight compression bump? Or is this likely to cause valve clearance problems?

The car is revved to the 7300 redline only.

Use is a little street, track and tarmac rally.

Thanks for your help