So how many if any ofyou guys have ported and polished the intake manifold?

Would it be worth doing? What do you think the gains would be? Loose lower end gain upper end? Or vice versa?

I knew of someone making tubular intake manifolds a while back over in Sweden I believe. I might be wrong on that. But I haven't seen anything really. Other then the manifold that VMS sells, but there isn't much info about it.

Can some one elaborate on VMS's product?

Anyone?

I would think you would have to port and polish your exhaust manifold as well.

I think porting refers to smoothing or actually changing the size or shape of the intake and exhaust ports on the head(s) of a car. Polishing is just that, smoothing any rough surface on intakes or exhaust manifolds to improve air flow. If you port an engine, best let someone do it who knows what they are doing and has access to a flow bench. You can really screw up a head if you dont get the intake and exhaust matched with what is happening in the combustion chamber. Polishing on the other hand is much less exacting and can be done by anyone with a Dremel and the proper bits.BJ

I know all that. I was asking if someone around here has done it and what the results were like. I wouldn't do it myself I don't have thr skill.

Never done it on a Volvo. Have had head ported on a Mazda 626GT and have polished both intake and exhaust manifolds on same car . Two results car picked up 10 hp on dyno and ran much smoother.Car was turboed so I assume same results possible on other vehicles.Sorry, did not mean to sound condescending on other post. BJ

to port and polish the intake and exhaust is ok, but the biggest gain will be from cams and gasket matching. if your gonna open up those ports really big, i hope you have a nice intake manifold, a big turbo and big intercooler as well as a big exhaust which = big $$$$$

usually port/polish is done on n/a engines, because there is no turbocharger to force the air into the intake manifold and force it out of the exhaust.

my father told me he did it in Ukraine long time ago on n/a engine, he said you can feel it a little bit, not that much, but I think it's worth it. pretty cool experience, if u do yourself.

Oleg

HAD THE HEAD'S PORTED ON MY CHEVY NOVA WITH A 350 V-8 AFTER I GOT IT BACK TOGETHER IT RAN LIKE A RAPED APE. IT MADE A HUGE DIFFERANCE.

^Your self or at a shop?

Because correct me if i'm wrong, you gotta get the heads ports and polished at a shop with a flowbench. Because you can seriously mess things up if you don't do it right...

I bought them that way i would probably screw it up if i did it.

Well, I'll be seeing if I screwed stuff up or not, as I'm just finishing the build of my motor. I gasket matched and Ported and Polished myself. The Head, Intake, as well as new R exhaust manifold. Here's a link to some photos if you care to look. ; http://rides.webshots.com/album/563883893OGxoym
August 8th, I'm taking everything up to IPD for them to do a swap and add their stage III kit. I'll let you know how it turns out. I'm keeping a photo record of the project at the site I left you, so it will be updated a lot shortly during the week of August 11 - 18, 2008.