Installing emi thunder manifolds on my 88 242ls problems wont fit ?
Trying to install a set of EMI Thunder manifolds on my 1988 242 LS with a silent thunder and am having nothing but problems. I have everything all mocked up and the risers do not line up with the transom exhaust holes. The risers are 28 1/8" center to center and my boat is about 25 1/2 center to center. Eddie marine part number #EMI-552 States that it will fit and is a direct replacement for most alpha and bravo drives, but one of their tech guys just told me that all the riser spacing on their manifolds are 28 1/8" has anybody installed these on there earlier boat with the silent thunder or does anybody know standard alpha/bravo center to center ? I don't want to re-do the exhaust holes in the transom ! Worst part is I am committed already having relocated the control cable plate & remote oil filter and cutting all the hoses for their manifolds ! Some help would sure be a prescient it thanks !!
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I have emi exhaust on small blocks in 88272 sr1. what power do you have?
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Ooops should have said that it's a 7.4 454
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Was your 242 originally a small block boat? Small blocks are narrower. I can measure mine to see what they are later today. You may need to fab up some 4 inch stainless offsets.
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If you could measure Mr Maine that would be cool, nope the boat is original 330hp 7.4 with a bravo 1, was thinking the same thing either flex or soft wall exhaust hose instead of the factory hard wall rubber exhaust hose !!
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I have EMI Thunder exhaust on my 242. I needed them 3 inches taller than stock risers. I had stock height risers and they were too low. here is a few pics.
http://i880.photobucket.com/albums/a...07138298_n.jpg http://i880.photobucket.com/albums/a...46907571_n.jpg |
FRICK !?!? I don't get it ?? My problem is not the height but to wide, my center to center is 25 1/2" on the transom and the manifolds are wider, wide enough to make the rubber hose not line up . Do you happen to know what your center to center on your transom ? do you have a Silent Thunder ?
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My small block is 24 on center at the transom, the big block is 27.5 on center. Stainless marine on the small and gils on the big. Formula 206 and 311
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Does the Silent Thunder on my boat have something to do with my 25 1/2" center to center ??
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My guess is the split the difference between the spacing of the BBC and the sbc since the boat came with both. I have a friend with a 242 BBC with sm exhaust no issue. I can have him measure his but we have snow coming so may be a couple days
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