| KAAMA |
10-22-2002 09:22 PM |
88 Mach,
I know of some guys running the Eddie Marine EMI cast aluminum manifolds. They do make more power over the stock Merc cast iron exhaust manifolds and are much lighter as well. However, ALL the Mercs and some styles of the Eddie Marine manifolds have like a 2.5 inch collector with several 90* bends which really narrows down the exhaust flow. This is also where the water is introduced into the exhaust pipe and mixes with the exhaust gases. This isn't really the best system if you're looking for more power and performance. I think Eddie Marine offers it this way so that a person can still use the existing stock Merc exhaust hose that will fit the Eddie Marine collect that is identical to the Merc. The difference between the Eddie Marine and the Merc exhaust system is that the Eddie Marine manifolds have a different design within the manifold itself. The primary exhaust tubes are seperated more vs the stock Merc maniflolds which translates into more power. However, if the collector size was more like 3.5 inches or larger vs the stock 2.5 inche size; you would see even more power because the engine is capable of breathing much better. Eddie Marine may offer a style of manifold with a bigger collector, but will probably require a different tail pipe (or riser). Otherwise, Stainless Marine offers a good one the would work well for you with the bigger collector size---plus you can get them with jacketed stainless steel tailpipes in dry stack form. Plus they have a better "elbow" riser design over the Merc which makes a smoother transition from the manifold to the collector/tailpipe. But like I said; Eddie Marine may offer something like this too.
The thing you want to stay away from are the 90* bends and small 2.5" diameter collectors. Hope this has helped a little. :)
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