[crenbbf]

Originally Posted by blykins

Well, you have a mismatch, but it's not a really bad mismatch. You may be leaving a few ponies on the table, but the roof of the intake runner is below the roof of the cylinder head port, so you're not going to see any "bad" symptoms there.

I've seen engines built by other builders where if you were to look down into the intake with a scope, you'd see cylinder head sticking into the intake runner. You can imagine that if the air/fuel charge were heading down the runner, it would "hit a wall" and it would possibly cause some reversion.

In your scenario, you have a mismatch, but the intake opening is essentially smaller than the head opening. Depending on the size of the engine and the intake you're working with, this may not necessarily be a bad thing. Sometimes velocity is good...

Hi Brent

I was more concerned with the ports not being centred compared to the heads would this be an issue?

cheers Kiel