airjunky

Havent seen one either . Or an explamation why the bbf super cobra jet intake works so well on the std port heads .or if my 088' with 2.25 intakes are going to work as good as tom's heads.do the 525 heads have the same exhaust valve p/n as the std 502 mag?

airjunky

Definetly havent seen a blower on a set of gmpp crate 502 aluminums or eddys aluminum ovals . Not sayin its never been done

HaxbySpeed

Holley/weiand makes one. It's pretty $$ though, and probably not worth anything for what you're doing. I used one years ago on a 525sc with eddy marine heads.

MILD THUNDER

http://www.summitracing.com/oh/parts...1win/overview/

ealesh33

Good to know thanks Mild. I didn't really look for one once I was told that it wouldn't matter.

ealesh33

Have you used a square port intake on oval port heads before as well? If so did you notice a difference in the port mismatch? I was told we could weld the intake and head match it, but it would have little to no effect, and I would never notice it. A guy posted earlier in this thread that the square port intake actually did better then the oval on oval heads, not taking it as the gospel for sure, but with the amount of info I have it would be a waste of $680 unless my intake needed replaced.

MILD THUNDER

They are not cheap manifolds that's for sure. I know many have ran rectangle port intakes on oval port heads and it works. However I've never seen any data on if switching it for a port matched intake is worth power.

I have a slight mismatch from my rect intakes to rect heads as the ports are slightly different shape. It drives me nuts knowing its like that lol. Sooner or later I plan to pull them and do a nice port match. I wouldn't be able to sleep knowing I have a big rectangle port intake on an oval port head.

Have you seen any hard data that "it doesn't matter" for your application ?

Budman II

Sorry, had it in my mind for some reason that it was a procharger type setup instead of a roots style. Yeah, not a lot of options for oval port intakes for roots blowers.

Budman II

I just remember being told by several high profile builders that it would be a waste for me to run a great flowing head like my AFR 265's with a huge intake port mismatch. So I went the other way and ran an oval port intake on my "rovals".

ealesh33

Well every aspect counts for sure, but the question is what is measurable between the 2 in terms of gains or losses. For that question I have no data determining that, but from what I am hearing is that its pretty small. Its easy enough to modify the square port intake to match, but the question is, is it worth spending $680 for an oval intake, or the time and money to modify the square port. Lets compare cost to gains, is it worth spending $680 for 5-10hp? For me that answer would be no at this point with the budget, with a "open wallet" my answer would be yes its worth it, and I would buy the oval port intake. Now if we are talking 25-30hp gain that changes the answer for me to yes. However this is something that can be changed in the boat at anytime, and I would venture to say that it could be an easy swap with no other changes necessary besides maybe my tstat housing and/or adapter as the location is different on my merc intake vs the automotive/street intake.