Thread: ported manifolds

most would say not to waste any time on them, really.

In my experience the biggest restriction on the stock manifolds is the front manifold where it bends and restricts. You can't port it in that area and therefore.. a set of ported manis don't fix the issue.

Personally having done ported Em's in the past. I wouldn't do it again. I'd go straight to plog or headers.

i don't like the log style manifolds, even if they are better than stock.

how it is that hard to reproduce the stock bends and shape, with better diameter piping?

Originally Posted by Bio248

i don't like the log style manifolds, even if they are better than stock.

how it is that hard to reproduce the stock bends and shape, with better diameter piping?

Because its the stock bends that make it flow poorly.

they're tubular, how can the bends be bad?

make a plog...but make the bends pretty, kinda like how stock LOOKS.

I got a ported front manifold sitting in my garage that I got for free. Was wanting to put it on soon and hope I don't brake any studs. However, after reading this I might not bother, if it doesn't really do anything.

The obstructions in the manifold are in the primaries where they join...not the inlet that touches the cylinder head.

You can't really port that without cutting up the manifold and rewelding everything.

Would it hurt?

No.

Is it worth it?

Probably not.

I had a wrapped x-over...and I ported my front/rear manifolds at the same time I did a 3" DP.

I noticed a difference but it was probably all in the downpipe.