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Re: 727 BURNT UP! [Re: Leon441] #1021648
06/29/11 10:26 AM
06/29/11 10:26 AM
Joined: May 2008
Posts: 1,238
North Cackilacky
S
sdaurity Offline
pro stock
sdaurity  Offline
pro stock
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Joined: May 2008
Posts: 1,238
North Cackilacky
I could run that many with nitrous, but had to stack the drums with the turbo for it to last.


One day I will have something cool here.
Re: 727 BURNT UP! [Re: instigator] #1021649
06/29/11 12:37 PM
06/29/11 12:37 PM
Joined: Jan 2003
Posts: 16,925
NC
440Jim Offline
I Live Here
440Jim  Offline
I Live Here

Joined: Jan 2003
Posts: 16,925
NC
Quote:

I had already machined the front drum feed hole in the pump support...


Are you guys talking about the feed passage between the rings on the pump support (reaction support)? This applies/holds the front clutch pack.

I have seen a couple methods, including Griner's milling the space between the rings flat all the way down to the feed hole. This pic shows it simply "V" shaped to improve flow (during the engagement).

Re: 727 BURNT UP! [Re: 440Jim] #1021650
06/29/11 12:45 PM
06/29/11 12:45 PM
Joined: May 2008
Posts: 1,238
North Cackilacky
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sdaurity Offline
pro stock
sdaurity  Offline
pro stock
S

Joined: May 2008
Posts: 1,238
North Cackilacky
Quote:

Quote:

I had already machined the front drum feed hole in the pump support...


Are you guys talking about the feed passage between the rings on the pump support (reaction support)? This applies/holds the front clutch pack.

I have seen a couple methods, including Griner's milling the space between the rings flat all the way down to the feed hole. This pic shows it simply "V" shaped to improve flow (during the engagement).





Yes, I'm pretty sure they are. I had to use steel sealing rings and shim it up TIGHT (end play and clutches)and modify the drum for 7 clutches to keep high gear in more than one pass. Again this is around 1100 rwhp 3300lbs. I am going to turn it up somemore when I get it back out.


One day I will have something cool here.
Re: 727 BURNT UP! [Re: sdaurity] #1021651
07/01/11 02:52 AM
07/01/11 02:52 AM
Joined: Jan 2003
Posts: 296
Ontario Canada
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Hutch Offline
enthusiast
Hutch  Offline
enthusiast
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Joined: Jan 2003
Posts: 296
Ontario Canada
Im no 727 guru but for what its worth here it is. You will need 175 psi , use the 4.2 arm and do not use more than 5 clutch's in the front drum. 4 in the rear drum should be fine but 5 won't hurt just be careful when rev tuning in neutral. More than 5 in the front will just slow the car down and likely burn up anyway with the thin steels.If the front clutch's are burning I would suggest you have a build error not a lack of clutch capacity. If its all melting down , I would look at oil level accuracy. If your trying to use a Lokar dipstick , take your time reading it carefully.


Hutch

Re: 727 BURNT UP! [Re: Big Squeeze] #1021652
07/01/11 03:46 AM
07/01/11 03:46 AM
Joined: Sep 2003
Posts: 1,260
Netherlands
72Challenger Offline
pro stock
72Challenger  Offline
pro stock

Joined: Sep 2003
Posts: 1,260
Netherlands
Quote:

You might talk to John @ CRT......I know he's in the middle of making a VB with a brake and it may be nearing completion.....




+1

My buddy runs one of his 727's behind his 1200hp Hemi with no problems at all. Just a check in the off season and races the whole season again. Has lived in a 35-3600lbs roadrunner too.


'
Re: 727 BURNT UP! [Re: 72Challenger] #1021653
07/01/11 10:23 AM
07/01/11 10:23 AM
Joined: Dec 2006
Posts: 235
Tucson AZ.
RADAMX Offline
enthusiast
RADAMX  Offline
enthusiast

Joined: Dec 2006
Posts: 235
Tucson AZ.
I found it is the perfect width to use a 12 inch chop saw and I just grind a shallow U-groove 1/2 down the hole for max flow.
not saying it is the safest way but I do it by hand in about 30 seconds.

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