Port matching
Turbo Mini Forums

I'm about to start a bit of tinkering on my exhaust manifold to blade the dividers at the end before it bolts to the turbo. I'm wondering if any benefit will be gained from matching the exhaust ports to the head so there's a perfect unrestricted flow from the head exhaust ports into the manifold. Any input is welcome as I want to get things as efficient as possible

Masturbation is not a crime its a hobby

In theory yes . In practice it is probably minimal providing the mismatch is not too large, although i'm more of the
opinion that the pipe size is much more important.

That sir, is not rust, it is the progressive mass reduction system

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There's often a pretty big mismatch from head to manifold as standard, the manifold often overhangs the port by a good few millimetres, more so when the head's ported.
I would definitely open the manifold to remove this restriction.

Phil.

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