To Crate or not to Crate
I've got a mid 90's Formula 382 with carbed 502s standard 415hp. At a point where I have to either rebuild or replace one. I have seen several Crate engines around the web but after reading posts on OSO not sure about reliability of GM's contractors assembling them. Good or bad would like to get some input.
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Mercruiser black motors are all gm marine series engines. So they would of come assembled by gm. Just make sure it is thier marine motor and you should be ok as long as you understand it is a stock replacement and not a hp unit.
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If you are not looking to upgrade power, there is nothing wrong with GM crate power.
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Yep, and the latest Gen VI 502's have been dyno'ing between 445-465hp depending on induction and exhaust. That's on 87 octane. Nothin wrong with that.
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Originally Posted by 336Formula
(Post 3595555)
I've got a mid 90's Formula 382 with carbed 502s standard 415hp. At a point where I have to either rebuild or replace one. I have seen several Crate engines around the web but after reading posts on OSO not sure about reliability of GM's contractors assembling them. Good or bad would like to get some input.
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Thought about boring the old block to 540 to bring it up around 550hp. Which brings up another question. If i did only one side this season am I going to see a lot of issues with 550hp on one side of the boat and 100 horses less on the other?
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Originally Posted by Griff
(Post 3595824)
If they are Merc 502's then they are 390hp. IMO, its probably more cost effective to rebuild what you have.
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the new crate engines you see listed all over are NOT assembled by GM, they have a outsourced place doing the assembly...and the quality is shaky, bought 2 had a bad experiance with one and after doing research some others have as well...have a good machine/engine shop redo what you have...
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Originally Posted by offshoredrillin
(Post 3595874)
I would go this route as well, not even to 540, make them 509's with stout parts and you'll be miles ahead. might even be able to reuse your crank. with the right cam/head combo you could easily have more hp and great reliabilty.
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Originally Posted by HaxbySpeed
(Post 3595783)
Yep, and the latest Gen VI 502's have been dyno'ing between 445-465hp depending on induction and exhaust. That's on 87 octane. Nothin wrong with that.
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