Magnum 360 CPS and flywheel Question

[littlejeepr]

Does anyone know if the cps counts the teeth on the flywheel to determine timing or does the magnum flywheel have a cog on it that thes CPS picks up on. ALso can you use the old style flywheel on the new 360.

[Hero]

IIRC the CPS keys off the teeth on the flywheel. I do not think the non Magnum flywheel will work with a Magnum engin. Could be wrong on that tho. My experiance is from a Magnum 318 to 360 swap.

[BigGreenMonster]

i am fixin to put an old style flex plate on a magnum 360. i know the flex plates are diffrent as far as the converter bolt holes but i do not see the cranck holes being diffrent... i should put that on in the next day or 2. i will post back up with the info

[lmagee]

BGM, the motor will not run with the pre magnum flywheel. the outer edge of the flywheel is notched and thats what sends the signal to the CPS You will have to modify the 727 bellhousing so that the cps will go through it and read off the flywheel. And from what your are saying I gather the 727 tourque convertor will not bolt up to the 46re flywheel. Probably have to take the 46re flywheel to a machine shop and have it redrilled to match the 727 convertor

[Elwenil]

If I remember right, MP sold a flexplate with the holes stamped in the outer edge. As a matter of fact, I have one laying here in the floor that I bought and never used...

[crashnzuk]

The magnum 360 and the older 360 do not have the same amount of imbalance. I think you can get a B&M flexplate for the magnums so you can use a neutral torque converter.
Travis..

[BigGreenMonster]

BGM, the motor will not run with the pre magnum flywheel. the outer edge of the flywheel is notched and thats what sends the signal to the CPS You will have to modify the 727 bellhousing so that the cps will go through it and read off the flywheel. And from what your are saying I gather the 727 tourque convertor will not bolt up to the 46re flywheel. Probably have to take the 46re flywheel to a machine shop and have it redrilled to match the 727 convertor

ahhhh, i know there is a hole for the cps in the bellhousing but that is an easy fix... the flex plate is another story tho... i was under the impression the cps read the teath on the flex plate. i know the 727 had equal spacing between the converter holes... were the 46re has a rectangular pattern... i will look into the cps deal tonight or tomorrow then.

[Elwenil]

Just as a note the Magnum flexplate I have has the weights welded on it for the 360 Magnum engine already.

[The Rockslut]

Just run the magnum flexplate. You can get a torque converter from a late model 727 that will have the same bolt pattern as the magnum plate. Cant remember the exact application for the converter. If I find it I will post up.

Have this current setup in my buggy.

[littlejeepr]

I guess I'll try to hut down a manual flywheel to be on the safe side?

[Tufiremn]

The CPS reads the holes on the top of the flex plate. On a 360 the flex plate has wieghts on it for the external balancing that it needs. The flex plate for a 318 does not have the added weights. If your planning on running the Magnum 360 with MPFI, and a differnt trans than the 46re, you will need a PCM out of a 2500 with a 360 and manual trans.. Or so I've been told.

[littlejeepr]

I know that the 318 is internally balanced and the 360 is externally balanced it's been that way for a long time. I was just wondering if it read the teeth or needed the sensor dimples in it for the sensor to read. I'll find out soon enough about the computer thing but I can get my hands on a Mopar performance cpu for a manual. This truck had a three speed auto in it so I don't think the computer will matter enough to worry about for now.

[BigGreenMonster]

i have a 96 manual trans mopar performance comp for mine. i am fixin to go inspect both of the plates right now... post up the site for those converters. i hope that is not what i have to do but at least there is an option if the plates do not swap...

[BigGreenMonster]

aight, both my plares were the exact same except for the new one has the square bolt pattern for the 727 and the old one had a rectangular pattern for the 46re... both had the holes for the cps and they both had the offset crank bolt holes... so far so good!

[440scout]

i'm trying to swap a 96 360 into a 1970 a-100 w/727.... so all i would need is the notch for the cps the stock 96 flex plate and a later model (what year???) 727 torque converter? now doesn't the later 727 trans use a lockup converter that also has a different input shaft? i was looking at the 46re trans that i took off and it looks like it has a different starter location and size also plus the way the torque converter looks it looks like it (the ring gear for the starter)would sit farther away from the engine... the only reason i mention this is because i had thought of having a custom torque converter built but i assume i would have starter issues ... i thought this would be a common swap so there must be some way to remedey this.....

[littlejeepr]

Is there a difference between the auto CPS ansd the Manual CPS other than maybe a couple degrees of timing.

[BigGreenMonster]

i'm trying to swap a 96 360 into a 1970 a-100 w/727.... so all i would need is the notch for the cps the stock 96 flex plate and a later model (what year???) 727 torque converter? now doesn't the later 727 trans use a lockup converter that also has a different input shaft? i was looking at the 46re trans that i took off and it looks like it has a different starter location and size also plus the way the torque converter looks it looks like it (the ring gear for the starter)would sit farther away from the engine... the only reason i mention this is because i had thought of having a custom torque converter built but i assume i would have starter issues ... i thought this would be a common swap so there must be some way to remedey this.....

i matched my 46re and m 727 flex plate up and it was a perfect match acept for the converter holes... i will give the the part number and phone number to the place i got it... they do a bunch of mail order now... all the rest of my stuff seem to match up. my ord addapter should hopefully be here this weekend so i will let you know for sure when my junk is runnin

[440scout]

ok thanks

[440scout]

i found in the mopar performace catalog that they make a flexplate for the 360 to a regular 727 and it has the slots for the cps along with the weights for the counter balance so you can use any torque converter without worrying about having to weld those other weights ones onto the torque converter ... the part # is p4876706

[robbins18]

Magnum flex plate (1993) has square holes on the outer that is where the cps get's is counts from.It will only fit a magnum torq converter.( I think ??)
The cps it selve, standard is shorter. AT is longer.

The torq converter its selve (1993) is balanced.
I've been there done everything on a 1993 mag lots of wasted money :laughing:

[robbins18]

For my prerunner
GOD i should have gone chevy engine & trans i might still rip every thing out and redo it.
Its really sucks there is not more suff on the market for dodge.

[440scout]

ive heard from a few people who have done this swap and was told that these will still bolt right up to an earlier converter, unfortunately they have all done the earlier obdI style computer system wheras mine is the later obdII ....right originally the 360 has the balance weights on the converter but the mopar performance flexplate moves those weights to the flexplate thats alot easier if youre using an aftermarket torque converter or youre swapping the 360 in place of a 318 which is internally balanced ... thats the only reason i posted it ..... im not putting a 350 in anything i got its just too generic for me ....

[robbins18]

No i did not inply to use chevy Just soooooooo much more stuff on the market for them.

My swap was very painful (1993) to 1984 tranny I did not have the internet nor did i have anyone with a brain (parts house)to help me.
Installing the converter was a pain in the ass after 4, 4th being the write one.
Anyways if i was too do it again i would NOT.

Right now the engine has a mefi 3 gm efi system on it ( marine engine system)Everything is good just have to get the ecm programmed.Why i went with a mefi 3 gm system SIMPLE harness.1 simple harness on the engine thats it.
But am a marine tech to i have my hands on all that stuff real easy.

[robbins18]

:D did you every get the answer to your ?

STD flywheel has the square holes in it for cps count.
AT has the holes in the flexplate
Now am talking about 1993 5.9 mpi
1994 & up shit i have no idea.

[440scout]

the 97 i have is still the square slots in the flexplate also.. the main thing with this is that im putting this in a 1970 a-100 pu so its already a 318 so mounting exhaust etc etc will be a bolt in its just this wiring that im leary about if i was doing a custom fab setup where i had to make all these things plus the wiring i probably wouldnt use the mopar setup either ... i thought with as many of these things around there would be more info on swapping somwthing like this we cant be the first people to try this, since the magnum was released in 92 right???

[robbins18]

Yes there is nothing out there for wiring help some jeep stuff but not much UNLESS i missed it :D
Painless makes nothing, Just the hemi the have stuff for i called them asked the gave me a couple phone # thoughs other place's just said the samething 1 even told me good luck with a smart ass laugh LOL!!!
I did do it just i used every wire out of the old truck (1993)
Dash harness
engine harness
chassis harness
engine compartment harness
gauge panel (check engine light is in it)
panel that has the 4x4 & brake light & abs light.

[robbins18]

Don't forget about the fuel pump
In my ramcharger i just got a new tank to install the new pump and sender screw in type stock dodge.
But 1 year later i had a engine harness problem.
Make a long story short dodge harness N.L.A.
Junk yard no luck trucks looked so bad i did not waist my time with them.
So i pulled every wire out and wired my selve.