Using rectangular port intakes on oval port heads

[HS PROFESSOR]

Just think of all the wasted money people spend on PORT MATCHING intake manifolds !!!!

[nuch_ss396]

[ QUOTE ]
Just think of all the wasted money people spend on PORT MATCHING intake manifolds !!!!

[/ QUOTE ]

The more people that respond to this thread, the more
amazed I become.

Well, to be more specific, I am starting to believe that
there may be some kind of "special" relationship between
the rectangular port intake & the oval port heads. This
phenomenon may not be the same with other set-ups. It just
seems to smack in the face of: Who would've thought that
would happen!

When I think of all the books and magazine articles I've
read over the years about engine building & especially port
matching, etc. I have to laugh. Kind of makes you really
wonder about what is true, and what is nice to have.

I sure wish we had some of the Chevy Engineering Staff from
"back in the day" to bounce this off of. Oh well......

Steve

[HS PROFESSOR]

I'm sure when you get up into the high horsepower stuff say 500+ , it becomes much more critical. But on the average 300-400hp big block it doesnt seem to matter.I had a dart oval intake on my 600 hp bracket 454,and picked up a full .01 and 1.5 mph going to a squareport victor jr.My new motor makes closer to 700hp and i'm sure my old oval dart wouldnt keep the pace.

[jasonL78]

Ok this sounds good I have oval port heads on my 68 and would like to put a 163 intake on it. What intake gasket set do you use, oval or rectangular.

Jason

[Keith Tedford]

Use the rectangular port gaskets or you will have a huge air leak. Snap an oil shield under the intake while you have it off. Keeps hot oil off the underside of the intake. Block the heat crossover as well.