Mercury 700sci 2009 model, manifolds
11-23-2015 | 08:29 PM
#22
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Joined: Jun 2009
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From: Chicago
That`s good info, i have a set of the close manifolds but they hit my valve covers because the valve covers sit higher due to the spring oilers. So I had to get exhaust spacers.
Did not know about the one bolt riser clamp , that would be nice. Mine keep scratching the valve covers
11-24-2015 | 09:57 AM
#23
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Custom Marine told me that the headers in my boat are all custom taller leaned headers specific to that build. All 4 are "straight back" style, the front are 3" taller style, and the inside header on each engine is leaned (front leaned in, back leaned out).
I believe I have to go to the same root, which is CMI reproducing the same staff as they did for Mercury. Otherwise we will have to change all tubes after mufflers I believe, OEM will not fit.
Have sent email to Stainless marine with photos of my engine bay as well, I wait to see what they say if it fits and then decide.
You are all right about the reliability staff, it probably will be a big blow if water leaks in the cylinders in quantity..
I believe I have to go to the same root, which is CMI reproducing the same staff as they did for Mercury. Otherwise we will have to change all tubes after mufflers I believe, OEM will not fit.
Have sent email to Stainless marine with photos of my engine bay as well, I wait to see what they say if it fits and then decide.
You are all right about the reliability staff, it probably will be a big blow if water leaks in the cylinders in quantity..
11-30-2015 | 08:40 AM
#26
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From: Cleveland, Ohio
I believe they were cut already, at least there was not much more we could do (no stock left to cut), in order to make them fit. Believe me, we tried everything, we even though about moving the engines apart because we had room with the driveshafts. In the end, it was more expensive to buy "new" manifolds. I think we even found out that one motor had been "tilted" away or rotated in order to make them fit on the old 454s. It was a crappy day when I got that phone call.
12-01-2015 | 07:18 AM
#28
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From: Cleveland, Ohio
I cannot remember the exact measurement, but 35"+ comes to mind.
Off topic but what props are you running? I forget. I did the BAM calculator with what Gil told me he ran the boat at just testing, it was coming up around 10% of slip which I thought was a good number. I know the boat is underpropped now, I may pick up a pair of 32s before next season. Just curious what your baseline numbers are seeing as we have a pretty similar setup. I want to get an idea if I can push big diameter 32s just under the limiter.
Off topic but what props are you running? I forget. I did the BAM calculator with what Gil told me he ran the boat at just testing, it was coming up around 10% of slip which I thought was a good number. I know the boat is underpropped now, I may pick up a pair of 32s before next season. Just curious what your baseline numbers are seeing as we have a pretty similar setup. I want to get an idea if I can push big diameter 32s just under the limiter.
12-02-2015 | 07:11 AM
#30
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From: Cleveland, Ohio
^^ That's what I'm going to move up to, what diameter are they? So, if you can spin them to 5700rpm, you're right at 100mph in perfect conditions, pretty cool. So are you calculating about a 10% slip? That's about where I think I am.
