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727 front drum billet steel vs billet aluminum piston #2294302 04/26/17 02:22 AM 04/26/17 02:22 AM
Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan	Talked to John Cope today about billet steel front drum. The billet steel drum is available with a billet steel piston from John, but with billet aluminum from other vendors. Pros and cons of the piston material? Does it really matter? http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294344 04/26/17 07:26 AM 04/26/17 07:26 AM
Joined: Mar 2006 Posts: 9,836 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,836 MI, usa	I've run both. I like the aluminum drum. The billet steel is very heavy. I think the clutch and band wear is better with the aluminum. For sure my car was .10 quicker in the 1/8 back to back. Doug

Re: 727 front drum billet steel vs billet aluminum piston [Re: dvw] #2294398 04/26/17 11:12 AM 04/26/17 11:12 AM
Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan	Which aluminum drum did you use, full metal jacket or all aluminum. Again, curious to the piston material, billet steel billet aluminum. Does it make any difference? http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294414 04/26/17 11:25 AM 04/26/17 11:25 AM
Joined: Oct 2003 Posts: 11,684 W. Kentucky justinp61 I Live Here
justinp61 I Live Here Joined: Oct 2003 Posts: 11,684 W. Kentucky	My steel drum from CRT came with an aluminum piston.

Re: 727 front drum billet steel vs billet aluminum piston [Re: justinp61] #2294416 04/26/17 11:28 AM 04/26/17 11:28 AM
Joined: Jan 2003 Posts: 13,365 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,365 Marion, South Carolina [><]	Originally Posted By justinp61 My steel drum from CRT came with an aluminum piston. Pretty sure the billet steel A&A drum I bought from CRT came w/ an aluminum piston. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294430 04/26/17 12:07 PM 04/26/17 12:07 PM
Joined: Feb 2003 Posts: 2,560 S.E. Michigan cl440 master
cl440 master Joined: Feb 2003 Posts: 2,560 S.E. Michigan	I have run both billet aluminum and billet steel drum. The car lost nothing! Ran exactly the same #'s. Not having to change trans fluid every 25 passes like they say you should with the aluminum drum is a bonus. As far as the piston material goes? We have an aluminum piston but steel should be fine also. I wouldn't give the piston material a second thought.

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294432 04/26/17 12:07 PM 04/26/17 12:07 PM
Joined: Mar 2006 Posts: 9,836 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,836 MI, usa	Both drums came from A&A. Last inspection all clutches and bands looked new. It had 150 passes with no fluid change. Doug

Re: 727 front drum billet steel vs billet aluminum piston [Re: justinp61] #2294448 04/26/17 12:30 PM 04/26/17 12:30 PM
Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan	My mistake. went back to copes site and it does not list piston material, just says billet. He does offer an ultimate billet steel as well as a billet steel drum. More money for the ultimate, just curious to whats included with it. http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294502 04/26/17 02:21 PM 04/26/17 02:21 PM
Joined: Aug 2003 Posts: 43,181 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,181 Bend,OR USA	I would look for and buy the aluminum drum with the steel liner for the band I should buy several of them now before I need them, huh Last edited by Cab_Burge; 04/26/17 02:21 PM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294513 04/26/17 02:52 PM 04/26/17 02:52 PM
Joined: Nov 2015 Posts: 876 Missouri J jwb123 super stock
jwb123 super stock J Joined: Nov 2015 Posts: 876 Missouri	My vote is for the aluminum drum with the steel sleeve, and aluminum piston, light weight, is easy on the band. I never tried a back to back test on 1/4 mile times. But since the drum has to be stopped by the band for 2nd gear, the lighter the drum the less stress on the band. Plus it is better material so it will not explode like the stock drum at high RPM'S

Re: 727 front drum billet steel vs billet aluminum piston [Re: jwb123] #2294551 04/26/17 04:14 PM 04/26/17 04:14 PM
Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan	I talked to John Cope yesterday about that drum. He said he had one in the shop when they first came out. wasn't impressed with it and thought it looked cheesy. I haven't totally gave up on the full metal jacket just yet. Too bad their isn't someone on here that can give us first hand info on it. ya or nay. http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294663 04/26/17 08:31 PM 04/26/17 08:31 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	i have the billet steel drum in my scamp, and i recommend it highly. i got mine from cope. for what is the good life if not doing things thoughtfully?

Re: 727 front drum billet steel vs billet aluminum piston [Re: jwb123] #2294682 04/26/17 09:09 PM 04/26/17 09:09 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Originally Posted By jwb123 My vote is for the aluminum drum with the steel sleeve, and aluminum piston, light weight, is easy on the band. I never tried a back to back test on 1/4 mile times. But since the drum has to be stopped by the band for 2nd gear, the lighter the drum the less stress on the band. Plus it is better material so it will not explode like the stock drum at high RPM'S If you knew the facts about a stock drum blowing up you wouldnt say that last line of your statement.. a stock drum is fine IF you dont trash your over running clutch.. if you trash the over running clutch you then spin the drun 2.2 times the engine rpm.. DONT pedal the engine while your still in low gear( if you spin.. SHIFT).. if you trashed the over running clutch the drum can take ABOUT 6600 rpm before it reaches the point that centrifugal force will let it blow.. I'm still running a stock drum and have been since I started racing(a number of years now).. if you dont do stupid stuff you wont have a problem.. but of course a lot of people will say it will blow.. BS.. dont do stupid stuff... OK now all of you can say I'm wrong.. but I've still never blew one up.. and I turn at least 8200 rpm on every shift.. also this is in the same boat that if you put a bolt in sprag, your fine.. more BS.. a bolt in sprag is for one that spun in the housing

Re: 727 front drum billet steel vs billet aluminum piston [Re: justinp61] #2294717 04/26/17 10:44 PM 04/26/17 10:44 PM
Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio dartman366 I Live Here
dartman366 I Live Here Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio	Originally Posted By justinp61 My steel drum from CRT came with an aluminum piston. so did mine Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.

Re: 727 front drum billet steel vs billet aluminum piston [Re: MR_P_BODY] #2294722 04/26/17 10:50 PM 04/26/17 10:50 PM
Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio dartman366 I Live Here
dartman366 I Live Here Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio	Originally Posted By MR_P_BODY Originally Posted By jwb123 My vote is for the aluminum drum with the steel sleeve, and aluminum piston, light weight, is easy on the band. I never tried a back to back test on 1/4 mile times. But since the drum has to be stopped by the band for 2nd gear, the lighter the drum the less stress on the band. Plus it is better material so it will not explode like the stock drum at high RPM'S If you knew the facts about a stock drum blowing up you wouldnt say that last line of your statement.. a stock drum is fine IF you dont trash your over running clutch.. if you trash the over running clutch you then spin the drun 2.2 times the engine rpm.. DONT pedal the engine while your still in low gear( if you spin.. SHIFT).. if you trashed the over running clutch the drum can take ABOUT 6600 rpm before it reaches the point that centrifugal force will let it blow.. I'm still running a stock drum and have been since I started racing(a number of years now).. if you dont do stupid stuff you wont have a problem.. but of course a lot of people will say it will blow.. BS.. dont do stupid stuff... OK now all of you can say I'm wrong.. but I've still never blew one up.. and I turn at least 8200 rpm on every shift.. also this is in the same boat that if you put a bolt in sprag, your fine.. more BS.. a bolt in sprag is for one that spun in the housing I agree with you Mike. the only reason I put a steel drum in mine was the old stocker was junk so I needed one anyway and verytrue on the bolt in sprag too. Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.

Re: 727 front drum billet steel vs billet aluminum piston [Re: mopar dave] #2294759 04/26/17 11:48 PM 04/26/17 11:48 PM
Joined: May 2003 Posts: 13,189 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,189 aZLiViN	break a rear gear on launch, shock the driveline and roll the sprag.... what happened that was so stupid in this scenario??

Re: 727 front drum billet steel vs billet aluminum piston [Re: MR_P_BODY] #2294760 04/26/17 11:50 PM 04/26/17 11:50 PM
Joined: Nov 2015 Posts: 876 Missouri J jwb123 super stock
jwb123 super stock J Joined: Nov 2015 Posts: 876 Missouri	I have been racing since 1974, all but one car mopars. I never have broken a roller clutch, have never blown up a drum either. As you say proper burn out technique will keep the roller clutch in good shape. A broken drive shaft at the wrong time will destroy a roller clutch and no driving technique will stop that from happening. But two of my buddies in one year with just as much experience as me, did blow up their transmissions and it was not pretty, both were hurt, but fortunately not seriously. Both had carbon fiber shields and both got pieces in the car. The drum in a 727 is a bomb waiting to go off, the cost of a good drum is cheap insurance for your car and yourself. I know exactly the science why the drum can and does blow up and have seen the results several times. One night in a hospital will pay for several drums, the cost of a drum is cheaper than a whole transmission case in pieces on the track. Seems common sense to my to buy a good drum. I just figured my luck was no different than my friends.

Re: 727 front drum billet steel vs billet aluminum piston [Re: jwb123] #2294773 04/27/17 12:08 AM 04/27/17 12:08 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Originally Posted By jwb123 I have been racing since 1974, all but one car mopars. I never have broken a roller clutch, have never blown up a drum either. As you say proper burn out technique will keep the roller clutch in good shape. A broken drive shaft at the wrong time will destroy a roller clutch and no driving technique will stop that from happening. But two of my buddies in one year with just as much experience as me, did blow up their transmissions and it was not pretty, both were hurt, but fortunately not seriously. Both had carbon fiber shields and both got pieces in the car. The drum in a 727 is a bomb waiting to go off, the cost of a good drum is cheap insurance for your car and yourself. I know exactly the science why the drum can and does blow up and have seen the results several times. One night in a hospital will pay for several drums, the cost of a drum is cheaper than a whole transmission case in pieces on the track. Seems common sense to my to buy a good drum. I just figured my luck was no different than my friends. Then buy one if it makes you feel better

Re: 727 front drum billet steel vs billet aluminum piston [Re: MR_P_BODY] #2294798 04/27/17 01:09 AM 04/27/17 01:09 AM
Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,040 Mt Morris Michigan	I'm gonna buy the aluminum full metal jacket or the steel billet just for piece of mind. Starting with a fresh build so kinda a no brainer anyway. Just need to make up my mind and get the full order in by friday, my trans builder is waiting. http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: 727 front drum billet steel vs billet aluminum piston [Re: MR_P_BODY] #2294872 04/27/17 08:07 AM 04/27/17 08:07 AM
Joined: Oct 2003 Posts: 11,684 W. Kentucky justinp61 I Live Here
justinp61 I Live Here Joined: Oct 2003 Posts: 11,684 W. Kentucky	Originally Posted By MR_P_BODY If you knew the facts about a stock drum blowing up you wouldnt say that last line of your statement.. a stock drum is fine IF you dont trash your over running clutch.. if you trash the over running clutch you then spin the drun 2.2 times the engine rpm.. DONT pedal the engine while your still in low gear( if you spin.. SHIFT).. if you trashed the over running clutch the drum can take ABOUT 6600 rpm before it reaches the point that centrifugal force will let it blow.. I'm still running a stock drum and have been since I started racing(a number of years now).. if you dont do stupid stuff you wont have a problem.. but of course a lot of people will say it will blow.. BS.. dont do stupid stuff... OK now all of you can say I'm wrong.. but I've still never blew one up.. and I used to turn at least 8200 rpm on every shift.. also this is in the same boat that if you put a bolt in sprag, your fine.. more BS.. a bolt in sprag is for one that spun in the housing Fixed it for ya.

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