Supercharging 6.2l Mag engines
#1
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Thread Starter
Supercharging 6.2l Mag engines
Not sure if this is a good idea. Have messages to Wipple and Young Marine to see if there is a package that works with engines equipped with catalyst exhaust. Seems that there are packages for the everything non-catalyst exhaust, and maybe the 350 mag with ECT....but nothing out there for the 6.2l Mag.
I have thought of an engine exchange, even to an LS platform, but the cost is just too high. The idea of a supercharger seems like a good one from a cost standpoint(compared to engine replacement). Of course, the goal would be to not have a serious impact on durability of the package. Engines currently have around 125hours on them, so there is a lot of life left in them. Making sure there is a proven tune for the catalyst exhaust is another challenge.....and I do not want to be the test bed. I would like a mild addition of power(maybe +100HP from the stock 320) to 420hp. I think that this would make a BIG difference in the drivability of the boat, planning times, and to some extent, top end.
Any thoughts to share?
I have thought of an engine exchange, even to an LS platform, but the cost is just too high. The idea of a supercharger seems like a good one from a cost standpoint(compared to engine replacement). Of course, the goal would be to not have a serious impact on durability of the package. Engines currently have around 125hours on them, so there is a lot of life left in them. Making sure there is a proven tune for the catalyst exhaust is another challenge.....and I do not want to be the test bed. I would like a mild addition of power(maybe +100HP from the stock 320) to 420hp. I think that this would make a BIG difference in the drivability of the boat, planning times, and to some extent, top end.
Any thoughts to share?
#3
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Mercruiser warranty expired? Do any marine police have a way to check your emissions? Or even know the diff? Take the cat exhausts off and put them in the attic. Then get real exhausts and a better tune-fuel map.
#4
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That's a great package but I feel the original 6.2 is not strong enough for the superchargers . We've made good power with their set up . Here's something we've worked on which started life in the 6.2 but we had to step it up to get it to hold.
#5
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Good morning Laz. Really enjoyed some of your recent threads in the Q&A section. I'm surprised the 6.2 isn't supercharged more in marine applications. You mention in your post above you had to "step it up to get it to hold". How involved is this? Pistons, connecting rods, crankshaft, valvetrain??? Also the OP mentioned a 100 HP a side is plenty. If you bolt on some intercooled Whipples with 4lbs of boost surely this would satisfy the goal. I use to track a supercharged Rousch Mustang with stock 4.6 and 4lbs of boost with zero issues for 18K miles. I know street and marine are apples and oranges but the track environment is a brutal environment as well.
#6
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Good morning Laz. Really enjoyed some of your recent threads in the Q&A section. I'm surprised the 6.2 isn't supercharged more in marine applications. You mention in your post above you had to "step it up to get it to hold". How involved is this? Pistons, connecting rods, crankshaft, valvetrain??? Also the OP mentioned a 100 HP a side is plenty. If you bolt on some intercooled Whipples with 4lbs of boost surely this would satisfy the goal. I use to track a supercharged Rousch Mustang with stock 4.6 and 4lbs of boost with zero issues for 18K miles. I know street and marine are apples and oranges but the track environment is a brutal environment as well.
#7
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Pistons and 4.5 qt. oil capacity/no oil cooler are definite limiting factors on supercharging the 6.2L MPI in stock form.