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904/727 behind a 5.7
#2496494
05/15/18 03:27 PM
05/15/18 03:27 PM
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Joined: Mar 2005
Posts: 1,545 Michigan
Kiddart
OP
pro stock
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OP
pro stock
Joined: Mar 2005
Posts: 1,545
Michigan
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I know its not a direct bolt up but what is needed to go with a 727 and a 904 to a 5.7.
Thank you Kiddart
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Re: 904/727 behind a 5.7
[Re: Kiddart]
#2496542
05/15/18 05:12 PM
05/15/18 05:12 PM
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Joined: Jan 2003
Posts: 2,032 MD
RTSE4ME
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,032
MD
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Re: 904/727 behind a 5.7
[Re: Kiddart]
#2496655
05/15/18 09:44 PM
05/15/18 09:44 PM
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Joined: Mar 2005
Posts: 1,545 Michigan
Kiddart
OP
pro stock
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OP
pro stock
Joined: Mar 2005
Posts: 1,545
Michigan
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and that was it? Cool no spacers for the convertor? last question for tonight. is there a list of required items to have on hand or that are needed. I have seen one but cant seem to find it as always
Thank you Kiddart
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Re: 904/727 behind a 5.7
[Re: Kiddart]
#2497301
05/17/18 06:28 PM
05/17/18 06:28 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,618
Rio Linda, CA
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It seems that a lot of folks were bolting up the trans without the spacer until somebody discovered that the 5.7 crank flange extended further from the block than the LA/Magnum.
The INTERNET, the MISinformation superhighway
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Re: 904/727 behind a 5.7
[Re: Kiddart]
#2497326
05/17/18 07:52 PM
05/17/18 07:52 PM
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Joined: Jan 2005
Posts: 12,406 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
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I put a straight edge across a crank flange on both a 5.9 mag and a 5.7 hemi and the 5.7 crank mounting surface does not go out as far on the 5.7 so a spacer would make things worse not better all else being the same.
The hemi does use an 8 bolt plate instead of a 6 bolt SB pattern and the 5.7 has the same 8 bolt pattern as a 4.7. Seems like you could use the 4.7 or 5.7 flex plate and just take off the starter ring gear on the converter. Edit At least on a 727 as the ring gear is the same diameter.
Last edited by HotRodDave; 05/17/18 07:56 PM.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 904/727 behind a 5.7
[Re: Kiddart]
#2497435
05/18/18 02:32 AM
05/18/18 02:32 AM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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You can buy flexplate from mancini for $70. With one of my torque converters i needed to make a spacer, changed converter than didn't need a spacer. Changed trans and another converter and didn't need a spacer. Mock it up outside the car first
Last edited by sixpackgut; 05/18/18 02:32 AM.
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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