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Re: 360 magnum/904 balance list [Re: GO_Fish] #740383
07/06/10 05:33 PM
07/06/10 05:33 PM
Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan Offline
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Oakdale CT
Quote:



With the weighted flexplate and a symmetric pattern, what stops you from mounting it in the wrong orientation??




"When the factory changed to a weighted flexplate they also changed to a symmetric 90° converter bolt pattern"

Since the weight is on the flexplate where the converter ends up doesn't matter. The converter has a neutral balance.

Re: 360 magnum/904 balance list [Re: gdonovan] #740384
07/06/10 06:01 PM
07/06/10 06:01 PM
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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goldmember Offline
master
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Gainesville,FL
Quote:

Quote:



With the weighted flexplate and a symmetric pattern, what stops you from mounting it in the wrong orientation??




"When the factory changed to a weighted flexplate they also changed to a symmetric 90° converter bolt pattern"

Since the weight is on the flexplate where the converter ends up doesn't matter. The converter has a neutral balance.


Correct.

Re: 360 magnum/904 balance list [Re: John_Kunkel] #740385
07/06/10 06:52 PM
07/06/10 06:52 PM
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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joedust451 Offline
super gas
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Branson, Mo.
Quote:

Quote:

All he needs if he's going to use a stock factory shortblock is a flexplate from a later model 360 magnum that has the weights on it, then he can run a "N" balanced converter,




When the factory changed to a weighted flexplate they also changed to a symmetric 90° converter bolt pattern, the 727 and 904 converters have one drive lug offset so the newer flexplate won't work on the 904 without elongating one hole.




Forgot about mentioning that too (i useally do), but still its a no brainer really, longgate the one hole & walla!! I ended up enlarging the holes on mine to exept the 7/16" bolts for my PTC, worked out great

Last edited by joedust451; 07/06/10 06:54 PM.

75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: 360 magnum/904 balance list [Re: goldmember] #740386
07/06/10 09:09 PM
07/06/10 09:09 PM
Joined: Jul 2003
Posts: 6,167
Maryland
GO_Fish Offline
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GO_Fish  Offline
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Maryland
Quote:

Quote:

Quote:



With the weighted flexplate and a symmetric pattern, what stops you from mounting it in the wrong orientation??




"When the factory changed to a weighted flexplate they also changed to a symmetric 90° converter bolt pattern"

Since the weight is on the flexplate where the converter ends up doesn't matter. The converter has a neutral balance.


Correct.




Duh, brain fart here...
I guess the Mag balancer crank bolt holes are still asymetric to make the balance goof proof.


Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph
Re: 360 magnum/904 balance list [Re: GO_Fish] #740387
07/08/10 07:49 PM
07/08/10 07:49 PM
Joined: Jan 2004
Posts: 684
Colorado
S
swingers_rock Offline OP
super gas
swingers_rock  Offline OP
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Posts: 684
Colorado
Great information! I did get my hands on a B&M 360 magnum-904 flexplate so i am set.

Thanks!

Re: 360 magnum/904 balance list [Re: swingers_rock] #740388
07/17/10 11:47 AM
07/17/10 11:47 AM
Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan Offline
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Posts: 10,847
Oakdale CT
Mopar has discontinued the torque converter weights package for the 5.9 magnum engine, no longer available.

Re: 360 magnum/904 balance list [Re: gdonovan] #740389
08/08/10 11:34 AM
08/08/10 11:34 AM
Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan Offline
I Live Here
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Posts: 10,847
Oakdale CT
An update warning- If you plan on using the factory flexplate be advised that the old school starter bendix strikes the tone wheel preventing the car from starting!

I think Chrysler moved the starter location on the A-500 and 42RH (overdrive 904 units) so the same flexplate could be used with the 518/46RE.

The mini-starter I have here will not fit with the 904, there is a section of the starter the strikes the block. There is a large "hole" at the rear near the oil pan rail, looks like 1/4 of the edge has to be removed.

The mini-starter does NOT have the large bendix like the old school starter does. I think I can grind off a section of the block and it just might work.

Otherwise you have to pull the motor out and have the tone wheel machined off.

What a pain..

Re: 360 magnum/904 balance list [Re: gdonovan] #740390
08/08/10 03:09 PM
08/08/10 03:09 PM
Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan Offline
I Live Here
gdonovan  Offline
I Live Here

Joined: Jun 2008
Posts: 10,847
Oakdale CT
Picture of problem.

6129309-starters.jpg (224 downloads)
Re: 360 magnum/904 balance list [Re: gdonovan] #740391
08/08/10 03:11 PM
08/08/10 03:11 PM
Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan Offline
I Live Here
gdonovan  Offline
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Posts: 10,847
Oakdale CT
The fix.

6129311-illfixyourass.jpg (181 downloads)
Re: 360 magnum/904 balance list [Re: gdonovan] #740392
08/08/10 03:13 PM
08/08/10 03:13 PM
Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan Offline
I Live Here
gdonovan  Offline
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
The results.

Car is running, 65 psi of oil pressure! Who would have thought a .480 lift cam would have been so darn quiet?? I feel so outdated, it use to be when you had a .480 lift cam you knew it! SOB idles like a stocker.

6129312-block.jpg (181 downloads)
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