496 exhaust on a 502 mpi
#12
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I got mine on, I was able to use the oil bracket that was there. Now I am in the process of building brackets for ecm and shift cables. hadley I have a bracket that I will give to you if you want it, just cover the ride.
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Hadley your pm is full. I just sent the part to you. Don't worry about shipping its not enough to mess with. Just pay it forward. Hope it works for you.
Travis
Travis
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Workin on the exhaust now. I am polishing the risers, Lot of work getting in all the tight spots. I also stripped the paint off the manifolds. They look pretty good without any polishing. I picked up used a remote filter mount off of a Merc. 420. Mounts to the back of the port head. Will need to get new oil lines made up. I cant seem to find a fitting that fits on the stock oil cooler. It is a male inverted flare. Going to mount the shift bracket to the transom. Will probably make some aluminum brackets to mount the module and electrical connectors to the manifolds. Excited to get on the water and see how much faster the boat is. Probably at least 6 mph with the new manifolds
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Nice to hear your project. I would not advise getting to over excited about seeing a +6mph speed increase alone from an exhaust upgrade alone, kinda think you should be thrilled to see 2-3 mph if you are lucky enough to achieve that though.
Best Regards,
Ray @ Raylar
Best Regards,
Ray @ Raylar
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Thanks Ray. I was only kidding about the 6 mph. I would be happy to see any gain. I am guessing that I will be gaining about 15 horsepower, What do you think?
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Took the boat out today with the new exhaust. Gained 1 mph. Which I am happy with but I have a new problem now. I burnt a hole thru the top of the starboard exhaust hose. The 496 exhaust is about 2 to 3 inches taller than the 454 exhaust which was not a problem for the stock rubber hose to bend that far. Apparently it was to much of a bend to not burn thru. Still trying to figure out a solution to this problem without spending another $500 on silicone hose or custom adapters. I may cut and weld some aluminum tubing to compensate for the offset.