318/392 Stroker Motors

Trowerpower
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Joined: Sun Dec 07, 2014 8:50 pm
Location: Northern Kentucky

318/392 Stroker Motors

Postby Trowerpower » Wed Oct 18, 2017 2:53 pm

Happy to report our 392 stroker motors have 140 hours on them, still running great with no oil consumption and good oil pressure!
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

Fastjeff
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Re: 318/392 Stroker Motors

Postby Fastjeff » Fri Oct 20, 2017 6:05 am

Outstanding!

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

martindesign
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Re: 318/392 Stroker Motors

Postby martindesign » Sat Oct 21, 2017 5:19 pm

What kind of speeds are you seeing?
Machanic, fabricator, carpenter, plumber, electrician, designer, hotrod builder and glutton for punishment. :ugeek: current boat; 1969 Marinette 32 express bridge 440's
Catawba Oh

Trowerpower
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Posts: 110
Joined: Sun Dec 07, 2014 8:50 pm
Location: Northern Kentucky

Re: 318/392 Stroker Motors

Postby Trowerpower » Sun Oct 22, 2017 9:21 pm

29 mph on the GPS at 4,000 rpm. Please note I have full iesenglass on the fly bridge, large batteries for my house setup that weigh 410 lbs, 6.6kw generator. Etc. I am looking to try different props next year. Running 16 x 15 three blades presently. 1:52 × 1 trannies.
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

jralbert
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Posts: 459
Joined: Fri Jul 11, 2014 9:15 pm

Re: 318/392 Stroker Motors

Postby jralbert » Sun Oct 22, 2017 11:32 pm

That is very good performance - 29 mph at 4,000 with a lot of wind resistance up top and extra weight below. We had a similar boat with 318's, same props and trans and settled for 24mph at best.
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD

Fastjeff
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Joined: Sat Jul 12, 2014 5:06 am

Re: 318/392 Stroker Motors

Postby Fastjeff » Mon Oct 23, 2017 2:06 am

My old 32 footer did 32 mph with stock 360s. (No flybridge or gen set and only two aboard.) It was stable at that speed, by the way. Felt my wallet beginning to disintegrate so I slowed right back down to cruise speed!

I seem to recall John Hall saying his 32 footer (w/ 325 hp S B Chevies) approached 40 mph with his trick Aussie props (but was a bit "tender" at that speed).

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

martindesign
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Re: 318/392 Stroker Motors

Postby martindesign » Thu Oct 26, 2017 6:44 am

Those numbers are solid for that rpm, I assume u weren't trying to push it? Those motors should make enough torque in that setup to run up to about 4800 rpm and that'll put you at about 35mph. I'm seeing 43-44 mph @4400, but it is not overly stable at that speed. Where we boat the water is only right for that kinda running about once a year.
Machanic, fabricator, carpenter, plumber, electrician, designer, hotrod builder and glutton for punishment. :ugeek: current boat; 1969 Marinette 32 express bridge 440's
Catawba Oh

Fastjeff
Site Admin
Posts: 867
Joined: Sat Jul 12, 2014 5:06 am

Re: 318/392 Stroker Motors

Postby Fastjeff » Thu Oct 26, 2017 5:07 pm

.." I'm seeing 43-44 mph @4400, "

Wow! That's freakin' awesome.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

martindesign
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Re: 318/392 Stroker Motors

Postby martindesign » Fri Oct 27, 2017 6:31 am

1:1 velvets lots of torque and a little extra cup, prop magic. Doesnt hurt that the 69 has the old flat pad hull. Speed is about all it's good for.
Machanic, fabricator, carpenter, plumber, electrician, designer, hotrod builder and glutton for punishment. :ugeek: current boat; 1969 Marinette 32 express bridge 440's
Catawba Oh