Tired 1987 Martinique 351-Rebuild/Replace |
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Mike Parmley
Newbie Joined: July-11-2016 Location: Wichita, KS Status: Offline Points: 28 |
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Posted: January-12-2018 at 3:05pm |
So I have a 1987 Martinique with PCM 351 and around 1450 hours. It runs and drives fine but is low on power. Compression is consistent in 7/8 cylinders @ 105-115. The other cylinder moves air but does not register.
I am looking at pulling and either rebuilding or replacing the motor. I would like to get more power out of the motor that I put back in. I am looking for suggestions on rebuild/replace and upgrades if rebuilt or vendors for the remanufactured option. Any advice is appreciated. |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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It's been pretty well documented here you'd just have to do a search. Just like a car- a bump in compression with flat top pistons,a Cam Research cam,GT 40P heads,Edelbrock intake manifold would make you happy
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MourningWood
Gold Member Joined: June-13-2014 Location: NorCal Status: Offline Points: 885 |
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I'm currently rebuilding a 351. They are readily rebuildable (providing the block is in good condition) and can use standard or upgraded automotive components, as well as aftermarket performance pieces. Know your engine's rotation. Several pieces are rotation-specific, most notably the camshaft.
Master engine rebuilding kits (in either direction) begin around $500. Another option is to build a stroker motor, increasing displacement and power. Many, many options available. |
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1994 Ski Nautique "Riot"
1964 Dunphy X-55 "One 'N Dun" 'I measured twice, cut three times, and it's still too short!" |
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5693 |
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As these guys mentioned lots of options... as they say in the picture shows speed is just a question of Money, how fast do you want to go?
Pick a hp level and there is likely a proven way to get there with a 351 platform - As for your engine I would at least pull the valve covers and see if you can find a root cause for your dead hole. Might be something relatively easy to fix in the valve train. If it is then a quick set of gt40 p heads along with some rockers and an intake might get you a lot more pep for an afternoons work and minimal cash outlay... |
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Jonny Quest
Grand Poobah Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2840 |
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Your 351W is likely a reverse rotation engine. Keep that in mind when you think about a rebuild or a re-power.
JQ |
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