SBC to stroke or not...
09-15-2011, 07:52 AM
#11
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Don't sweat the fuel economy in marine applications. That's like looking for virtuosity in a whore house.
A 350 is gonna get around 3 mpg on average. The 383 will get about 3 mpg.
I highly recommend adding to displacement via a stroker kit.
I would argue you'd be closer to the 300-350 hp with a mild cam.
Good luck with your project!
A 350 is gonna get around 3 mpg on average. The 383 will get about 3 mpg.
I highly recommend adding to displacement via a stroker kit.
I would argue you'd be closer to the 300-350 hp with a mild cam.
Good luck with your project!
Even at 300 - 350 hp, it will likely have better low and mid-range torque than the 350. I will just try remember not to hammer it coming out of the hole and back off if I am jumping any big waves
Len
09-15-2011, 07:57 AM
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Cobra Power has a decent looking rotating assembly that I am considering to build a pair of 383's for mine.
http://www.cobrapower.com/rotating-a...-balanced.html
What do you think...look like a pretty good set up for the $$$?
http://www.cobrapower.com/rotating-a...-balanced.html
What do you think...look like a pretty good set up for the $$$?
09-15-2011, 11:07 AM
#13
I forgot about the Alpha drive issue, but even so, the boat will respond well to the increased displacement and torque. In the end I don't believe creating a stroker motor will cost significantly more.
I'd hate to get it all back together and go "Gee, I wish I had gotten the extra 27-33 extra cubes."
It will be fun regardless. Good luck.
I'd hate to get it all back together and go "Gee, I wish I had gotten the extra 27-33 extra cubes."
It will be fun regardless. Good luck.
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09-16-2011, 09:22 PM
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fixx
another option,choose a cam and lifters ,,comp cam xtreme marine 268h if you want a lope idle go with the 270h,,then bolt them into this short block and install your heads and assorys..
http://www.competitionproducts.com/C...tinfo/SB383-L/
http://www.competitionproducts.com/C...tinfo/SB383-L/
09-16-2011, 11:14 PM
#18
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another option,choose a cam and lifters ,,comp cam xtreme marine 268h if you want a lope idle go with the 270h,,then bolt them into this short block and install your heads and assorys..
http://www.competitionproducts.com/C...tinfo/SB383-L/
http://www.competitionproducts.com/C...tinfo/SB383-L/
Any issues with the external balance requirement ? Which coupler/flywheel would be used ?
Last edited by sprink58; 09-16-2011 at 11:27 PM.
09-17-2011, 01:22 PM
#20
Crower hyd roller cams would be another option. They have a NOS/Forced induction/EFI line of roller cams with a wider LSA.
Something like the Crower 481 or 482 cam, maybe even the 483.
Regarding compression my stock Merc was 9.3:1 and 87 octane rated with iron heads. Currently I'm running 9.35:1 with iron heads but now use 91 for insurance.
Something like the Crower 481 or 482 cam, maybe even the 483.
Regarding compression my stock Merc was 9.3:1 and 87 octane rated with iron heads. Currently I'm running 9.35:1 with iron heads but now use 91 for insurance.
