e_racer1999 Posted August 11, 2004 Share Posted August 11, 2004 basically i have an N47 head and i want to port it to have square exhaust ports.... has anyone ever done this and exactly how much trouble is it going to be? i want to port-match this head to an E88 header and i don't want to have to do the valve work on my E88 to get the bigguns in there... any info please!! Quote Link to comment Share on other sites More sharing options...
JMortensen Posted August 11, 2004 Share Posted August 11, 2004 Uh, don't the round port heads have the steel liners in them? And aren't they cast in really deep? I think you'd be better off cleaning up the exhaust ports and running your square port header. IIRC the square port header will seal a round port head, but you get a huge flow restriction if you use a round port header with a square port head. I'd say clean it up and run it, or get another head. Quote Link to comment Share on other sites More sharing options...
Pyro Posted August 11, 2004 Share Posted August 11, 2004 I have used square port manifolds and headers on round port heads without any problems. Hold the gasket up to the head and you will see that it will work. Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted August 11, 2004 Author Share Posted August 11, 2004 awesome... i think that's the best thing i could've heard! thanks guys! Quote Link to comment Share on other sites More sharing options...
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