Single plain intakes for small engine with FI

Bobzilla said

I just realized in the original post you say you are running an LD340 on a mostly stock 318. Now I wonder if you have enough port mismatch to cause a loss of airflow on your 318 heads. I bet a large port head to small port intake on low end would be amazing it properly blended. Top end would suffer.

Any chance of getting a cheap bore scope down those ports to check how much of step is present where the intake mates to the head?

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Engine is coming out in the next month for other reasons. ISO a proper intake with correct ports as we speak. I’ve read a few old magazines from back in the day that said there is no issues from port size but velocity has to decrease from going from one size port (273/318) to large port (340/360).

when I built the engine I was going for “period correct.” Not high performance. But like every gear head.... now that it runs- I want MORE! Lol!