Stud Girdle
02-20-2017 | 09:27 AM
#61
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Posts: 2,399
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From: Toronto, Canada
02-20-2017 | 10:59 AM
#62
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Joined: Feb 2009
Posts: 8,356
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From: NW Michigan
Kinda sucks I had two sets of crane golds ready to go. I've gotta look into those rockers rookie was talking about. I kinda figured I might have some issues with the crane rockers and girdle fitment unless I used crane girdles.
02-01-2019 | 10:41 AM
#65
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something to consider. When ordering a set of girdles, make sure to ask what size base the included polylocks have. Some are .550, some are .600. You want them to match the rockers you are running. If you order a set that comes with .550 locks, and need .600 locks, the locks themselves are kinda pricey.
When running these you put the regular poly locks on then the extended poly locks that go through the girdle go on top OR the extended poly locks replace the original poly locks?
02-01-2019 | 11:09 AM
#66
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Joined: May 2012
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From: Midwest & T-Rock
most if not all girdle sets come with the long poly locks, ( two different lengths for intake and exhaust ) discard the old ones
Last edited by F-2 Speedy; 02-01-2019 at 11:11 AM.
07-11-2019 | 10:50 AM
#67
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Joined: Oct 2013
Posts: 140
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From: Chesterfield Twp., MI
this is one I have used twice, and as far as when needed, after talking to Bob M. at length I thinking starting at a 500hp would not be a bad idea..
http://www.ebay.com/itm/PROFORM-Big-...FXroAR&vxp=mtr
http://www.ebay.com/itm/PROFORM-Big-...FXroAR&vxp=mtr
07-11-2019 | 11:16 AM
#68
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Joined: Nov 2005
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From: Toronto, Canada
many variables here, cam profile, length of valve/pushrod/geometry... the farther off the pedestal the rocker sits, the more deflection the stud sees at rpm, sometimes this is just where it needs to be for the working mechanism to be "happy" thus it becomes fundamental for the use of a girdle, or better yet a shaft rocker system if budget allows.
just my $.002
just my $.002
07-11-2019 | 11:25 AM
#69
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Joined: Jul 2004
Posts: 11,332
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From: chicago
I measured deflection of the stud , just rolling the engine over by hand against spring pressure, it was eye opening. Now imagine the exhaust valve, that not only has to overcome spring pressure, but also has to overcome extremely high cylinder pressure to open.
07-11-2019 | 02:39 PM
#70
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Joined: Oct 2013
Posts: 140
Likes: 15
From: Chesterfield Twp., MI
many variables here, cam profile, length of valve/pushrod/geometry... the farther off the pedestal the rocker sits, the more deflection the stud sees at rpm, sometimes this is just where it needs to be for the working mechanism to be "happy" thus it becomes fundamental for the use of a girdle, or better yet a shaft rocker system if budget allows.
just my $.002
just my $.002
