Using balanced flywheel on a Magnum 360
- Thread starter poorhouse
- Start date
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If the engine hasn't been internally balanced I wouldn't run it with a neutral balanced flywheel
I use one of these with a neutral balanced flywheel to run Magnum 360s on my run stand.
Cley
Cley
PRH
Well-Known Member
It’s not like you’ll be making high rpm power pulls……..
if that’s what I had on hand, I’d do it.
if that’s what I had on hand, I’d do it.
Balance to what and how? Internal balanced? External balanced. They are ALL balanced. If you're talking about using a neutral balanced flywheel on a 5.9 Magnum, I advise heavily against it.
I don't think I'd break a cam in that way!
Cley
Cley
Have one on a 360, on the engine run stand now.
I should pull it off and make up some more.
Works with Flywheel or Flex Plate for the automatics... does not care if it's 904 or 727.
Yeah have started them up on the floor without to see if the engine runs, not the end of the world.
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Can't you get the factory flexplate from a salvage yard or parts store?
1994-1995 Dodge Ram 1500 Flex Plate - ATP Z-341 - PartsGeek.com https://share.google/Koi4ekc1ERs4EMwry
Firstly, thank you for all the replies. Appreciate it. To be clear, this is for a running (reported) take out 360 Magnum w/ auto trans. So, l have the external balanced flex plate, but that doesn't help me on a run stand. The various solutions appear impractical as to drilling-tapping-welding-$$$ for a 2 minute test run. George Jets is on to something more practical that l would consider, but like products have been discontinued. Sooo...if George has got one for sale, lemme know
, if not-there may be some tidal influence due to a 360 Mag in orbit. Best to have some sand bags filled in coastal regions.
, if not-there may be some tidal influence due to a 360 Mag in orbit. Best to have some sand bags filled in coastal regions.
If you have the automatic trans that came with the magnum engine, put them back together and start it up on the floor.
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Here is the template to mount your mopar starter to the magnum engine without a transmission. On your Run Stand.
Print it out to size so the holes match up to the bell housing bolt pattern. Then make one up out of steel plate. Trace, Cut, and Drill.
Better Template Pic ^^^
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Print it out to size so the holes match up to the bell housing bolt pattern. Then make one up out of steel plate. Trace, Cut, and Drill.
Better Template Pic ^^^
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Do the same with this RM-531 360 balance weight template. Size it up to fit the crankshaft register.
Then Trace, Cut, and Drill.
Print this template picture out, then see how much you need to expand it up to fit the crankshaft > then good to go.
We Make Everything...
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Then Trace, Cut, and Drill.
Print this template picture out, then see how much you need to expand it up to fit the crankshaft > then good to go.
We Make Everything...
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^^^
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Notice the handy Slotted bolt for holding the balance plate in place to easily mount the heavy flywheel... all lined up.
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Do you have a zero balance flywheel? You might be able to piggyback your flexplate.Firstly, thank you for all the replies. Appreciate it. To be clear, this is for a running (reported) take out 360 Magnum w/ auto trans. So, l have the external balanced flex plate, but that doesn't help me on a run stand. The various solutions appear impractical as to drilling-tapping-welding-$$$ for a 2 minute test run. George Jets is on to something more practical that l would consider, but like products have been discontinued. Sooo...if George has got one for sale, lemme know
View attachment 1716472981
thank you George for all the suggestions. WAY beyond my fab/skill level though. Not afraid to try new stuff-but reasonably confident between copying, printing, tracing, drilling, mounting...sumpin' goin' get F'd up
Have been playing around this evening with pictures of the RM-531 Balance Plate and some photo edit software to come up with a pattern to make the balance plates.
Just so happens I have a 318 crankshaft here in the house for fitting the balance plate pattern to.
Don't have a good straight on picture of the RM-531 at the moment, that would keep things in the proper proportions to make the pattern.
Rough Draft for now...
This pattern is actually on upside down > need to flip it to get the offset of the bolt holes to line up correct, and have the weight in the right position for balance.
Half the fun is thinking through it and see what you can come up with.
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Would be much easier just to take the actual RM-531 part off my engine run stand 360 and take it over to my Minnesota neighbor who works sheet steel.
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Just so happens I have a 318 crankshaft here in the house for fitting the balance plate pattern to.
Don't have a good straight on picture of the RM-531 at the moment, that would keep things in the proper proportions to make the pattern.
Rough Draft for now...
This pattern is actually on upside down > need to flip it to get the offset of the bolt holes to line up correct, and have the weight in the right position for balance.
Half the fun is thinking through it and see what you can come up with.
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Would be much easier just to take the actual RM-531 part off my engine run stand 360 and take it over to my Minnesota neighbor who works sheet steel.
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well, l'll be your 1st customer!
It's really something, every supplier I checked has discontinued that 360 balance plate, all across the board.
They definitely work as I have run a 360 with a neutral torque converter and trans on the floor just to hear that it would run. Shook just a little kind of like a miss at low rpm/idle.
Then I ran a 360 stock build on the Engine Run stand with the balance plate and it ran nice and smooth, no shaking.
Kind of wonder why demand dropped off so quick on those? Now none to be found.
Unless they all got bought up what was left of the stock after they stopped making them cause people wanted them for the 360s.
They really need 1/8" longer than stock crank bolts to hold properly for the long haul.
Sure would be easy to duplicate them if a person had the part in hand.
Always learning something...
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