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727 - Valve Body / Bolt in Sprag ???'s
#1410747
03/29/13 01:50 PM
03/29/13 01:50 PM
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Joined: Jul 2005
Posts: 336
Creston, Iowa
340man4ever
OP
enthusiast
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OP
enthusiast
Joined: Jul 2005
Posts: 336
Creston, Iowa
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Need to build a new 727 for a 440 and have a few questions..... What are my options for a manual valve body, forward pattern, with Low Band Apply Also rear sprag for BB 727 Is the factory sprag press in? Is there a factory bolt in sprag? ( I know there are aftermarket bolt in sprags ) Which bolt in sprag would be best for a mild bracket car (10 sec 3300 lb car) Thanks in advance 
Last edited by 340man4ever; 03/29/13 02:08 PM.
Curator at Adams County Speed Shop
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Re: 727 - Valve Body / Bolt in Sprag ???'s
[Re: 340man4ever]
#1410751
03/30/13 07:30 PM
03/30/13 07:30 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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ALL factory sprags were/are press in... a normal bolt in sprag is NO BETTER than the press in sprag.. the bolt in sprag was developed for if you spun a sprag in the case... the super sprags made by a couple of companies have a lot more rollers and wont allow it to roll over.. as for the valve body there are numerous that make a good valve body... in my opinion if you use a super sprag you dont need the LBA valve body but if you do go with it it will slow you car on decell in low gear where a non LBA wont 
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Re: 727 - Valve Body / Bolt in Sprag ???'s
[Re: John_Kunkel]
#1410757
04/01/13 01:11 AM
04/01/13 01:11 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
in my opinion if you use a super
sprag you dont need the LBA valve body
There's a guy on another Mopar forum who has killed 3 Supersprags with a LBA valve body. Like a belt and suspenders, both isn't a bad idea. 
I think he has a problem building his tranny or he
is doing something SERIOUSLY wrong.. like I've said
many times I still have a stock drum and never broke
any trans in 45 years of racing... but you cant do
stupid stuff... no LBA ... get out of low as soon
as possible
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Re: 727 - Valve Body / Bolt in Sprag ???'s
[Re: dusturbd340W5]
#1410759
04/02/13 03:22 PM
04/02/13 03:22 PM
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Joined: Jan 2003
Posts: 25,995
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,995
Rio Linda, CA
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OK, what driving technique would kill Supersprags with a LBA valve body?
The INTERNET, the MISinformation superhighway
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Re: 727 - Valve Body / Bolt in Sprag ???'s
[Re: MR_P_BODY]
#1410760
04/02/13 03:31 PM
04/02/13 03:31 PM
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Joined: Jul 2008
Posts: 30,491
Florida STAYcation
dOc …
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,491
Florida STAYcation
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Quote:
I still have a stock drum and never broke
any trans in 45 years of racing... but you cant do
stupid stuff... no LBA ... get out of low as soon
as possible
904 trans ?
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Re: 727 - Valve Body / Bolt in Sprag ???'s
[Re: loaderpro]
#1410763
04/03/13 03:18 PM
04/03/13 03:18 PM
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Joined: Jan 2003
Posts: 25,995
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,995
Rio Linda, CA
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None of the things you mention would explain failure with LBA. Anecdotal experience varies. I can add myself to the list of people who abused stock factory sprags to the limit (Clutchflite, 40 lb. flywheel, launch a WOT, 3000 lb. car, no LBA) and never had a failure of any kind and, yet, I personally witnessed big time failures in cars with less abusive use than mine.  This merely illustrates the difference between doing it wrong and getting away with it versus doing it right.
The INTERNET, the MISinformation superhighway
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Re: 727 - Valve Body / Bolt in Sprag ???'s
[Re: dOc …]
#1410765
04/03/13 04:10 PM
04/03/13 04:10 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
I still have a stock drum and never broke
any trans in 45 years of racing... but you cant do
stupid stuff... no LBA ... get out of low as soon
as possible
904 trans ?
You know damn well I run a 727
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