Rocker Stud Girdle?
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From: HONOLULU HAWAII
Rocker Stud Girdle?
When would these girdles be required???...The new roller cam going in is almost 600 lift.....Max RPM would be some where between 6000 and 6500.
If I need one I'll like to get the order in and here before Sept.... :flag :seeya Cappy
If I need one I'll like to get the order in and here before Sept.... :flag :seeya Cappy
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From: Waterloo ontario Canada
Re: Rocker Stud Girdle? (8T1-7T9 BIONIC VETTE)
I don't know when one is required but I liked the idea of supporting the rockers on the top so I went for the stud girdle which also required the taller valve covers which would/could cause interference with the power brakes.
Mine is a crane girdle and I adjust the valves once at the start of the summer and they stay put until fall when I back them off again.
Mine is a crane girdle and I adjust the valves once at the start of the summer and they stay put until fall when I back them off again.
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From: HONOLULU HAWAII
Re: Rocker Stud Girdle? (norvalwilhelm)
Thanks for the reply....I have the tall valve covers and the hydroboost brake system so no problem as far as clearance goes.
Gkull is coming over to help put this engine together for me......I'd like to have all the parts available prior to his arrival. :flag :seeya Cappy
BTW.....E-mail system has been down last few days.....so I'll keep checking back every now and then......Anyone have messages for me send via I-M......Looks like E-mail will be down for a while......a virus hit the provider and they don't know how to fix it......
Anti-Virus Companies....and competitors DSL and trying to put Road Runner cable out of business in this town.......Apparently they are the only ones who don't have a clue where the virus is coming from. :yawn: :flag :seeya Cappy
Gkull is coming over to help put this engine together for me......I'd like to have all the parts available prior to his arrival. :flag :seeya Cappy
BTW.....E-mail system has been down last few days.....so I'll keep checking back every now and then......Anyone have messages for me send via I-M......Looks like E-mail will be down for a while......a virus hit the provider and they don't know how to fix it......
Anti-Virus Companies....and competitors DSL and trying to put Road Runner cable out of business in this town.......Apparently they are the only ones who don't have a clue where the virus is coming from. :yawn: :flag :seeya Cappy
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Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: Rocker Stud Girdle? (8T1-7T9 BIONIC VETTE)
Stud girdles are only required if the tip of the stud exceeds .030 deflection when rotating the motor over by hand. It’s easy to measure with the valve cover off and all the rockers loose. Place a straight edge down the studs. They should all touch. Then as you crank down each rocker nut the springs that are fully compressed (Your max lift height) you will see how far it bends the studs.
Only two things affect how far they bend. Spring pressure and valve lift. Find out from AFR what your 210 heads spring pressure is. If you ordered them with the larger springs for a roller cam. You probably need a stud girdle.
The truth is hardly anybody on the street uses them. I only use stud girdles because the deflection of my larger diameter ARP studs is unacceptable. It would eventually destroy the aluminum head stud threads and the side loading of the valves in the guides would ware them out quicker.
When you purchase a stud girdle they come with their own set of Allen locking rocker nuts. I had to machine every locking nut with my Crane cam stud girdle to fit my combination of crower and comp cams 1.65 and 1.6 roller rockers. The Crane stud girdle is nice. It’s not a wimpy unit like some of the others.
[Modified by gkull, 3:09 PM 8/11/2003]
Only two things affect how far they bend. Spring pressure and valve lift. Find out from AFR what your 210 heads spring pressure is. If you ordered them with the larger springs for a roller cam. You probably need a stud girdle.
The truth is hardly anybody on the street uses them. I only use stud girdles because the deflection of my larger diameter ARP studs is unacceptable. It would eventually destroy the aluminum head stud threads and the side loading of the valves in the guides would ware them out quicker.
When you purchase a stud girdle they come with their own set of Allen locking rocker nuts. I had to machine every locking nut with my Crane cam stud girdle to fit my combination of crower and comp cams 1.65 and 1.6 roller rockers. The Crane stud girdle is nice. It’s not a wimpy unit like some of the others.
[Modified by gkull, 3:09 PM 8/11/2003]
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From: HONOLULU HAWAII
Re: Rocker Stud Girdle? (gkull)
Gkull,
I did order the AFR 210's with high lift roller cam springs.....looks like a PITA to install.
I got you I-M......I'll hunt down some .021 head gaskets.....If I can't find....can you get them up there and bring with you? Also bring the set of ARP Header studs....I'll gladly reimburse you....Cappy
I did order the AFR 210's with high lift roller cam springs.....looks like a PITA to install.
I got you I-M......I'll hunt down some .021 head gaskets.....If I can't find....can you get them up there and bring with you? Also bring the set of ARP Header studs....I'll gladly reimburse you....Cappy
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: Rocker Stud Girdle? (8T1-7T9 BIONIC VETTE)
Cappy ask on this forum about a multi layered head gasket. I don't have the best for what your doing. I got FlatOut Racing .021 thick silicone coated copper. They are about $62 a piece delivered. I've run copper for years and the occasional spitting out water out of one pipe doesn't really bother me. They last for a couple a years and then the first overheating problem you get water in a cylinder or two
I don't worry about it because I can have a new one installed in a about an hour. It gives me a reason to tear the motor down and inspect the parts. That's why I found the pitted roller lifter and dinged up billet cam. It's not a big deal when your motor is designed to be torn apart quite often. I would get sick with a blown head gasket on some of the late model Vettes I've looked at. More like 1/2 a day later even if you know what your doing.
I don't worry about it because I can have a new one installed in a about an hour. It gives me a reason to tear the motor down and inspect the parts. That's why I found the pitted roller lifter and dinged up billet cam. It's not a big deal when your motor is designed to be torn apart quite often. I would get sick with a blown head gasket on some of the late model Vettes I've looked at. More like 1/2 a day later even if you know what your doing.
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From: delmont pa
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Re: Rocker Stud Girdle? (8T1-7T9 BIONIC VETTE)
if you run a solid lifter cam make sure you get a stud girdle that you can set the lash with the girdle clamping bolts tight because if you have to looosen the clamping bolts to set the lash when you retighten the clamping bolts it could cause the lash to change because it will pull the studs one way or another. :chevy
[Modified by clem zahrobsky, 5:52 PM 8/12/2003]
[Modified by clem zahrobsky, 5:52 PM 8/12/2003]
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: Rocker Stud Girdle? (clem zahrobsky)
Clem, I know that you have been around cars for a long time. All the stud girdles I've ever seen hold the tall round Allen locking nuts. It pinches down enough that you can't rotate or change the valve lash setting without loosening the girdle locking bolt.
That one of the falsies about sollid roller cammed motors and lots of valve adjustments. I sometimes let mine go 5000 miles.
Like my crane cam girdle. You loosen the nut for two studs at a time. When your rocker is in it's loose posistion the stud is not deflected at all. so you set one or both of them and move on to the next st. You never loosen more than one nut at a time. You install the stud girdle with none of the rocker nuts turned down.
That one of the falsies about sollid roller cammed motors and lots of valve adjustments. I sometimes let mine go 5000 miles.
Like my crane cam girdle. You loosen the nut for two studs at a time. When your rocker is in it's loose posistion the stud is not deflected at all. so you set one or both of them and move on to the next st. You never loosen more than one nut at a time. You install the stud girdle with none of the rocker nuts turned down.
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From: delmont pa
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Re: Rocker Stud Girdle? (gkull)
i have been out of the bussiness for about 10 years now but they were available back then. because studs are not in true alignment when you retighten the girdle it will pull the studs as much as to change the lash .003. if your stud is leaning towards the side that you loosen the clamp it will move the stud back when you retighten the bolts. these girdles just allowed enought clearance to still allow you to turn the adjustment nuts. they were a slip fit over the adjustment nuts. these girdles just had slip fit holes bored into a solid bar and you tapped it onto the studs. it had set screws on the end to lock the up and down movement of the girdle. if you use a girdle that clamps the adjustment nuts and you loosen them to do the adjustment i would cleck the lash after you tighten the girdle.
[Modified by clem zahrobsky, 5:57 PM 8/13/2003]
[Modified by clem zahrobsky, 5:57 PM 8/13/2003]
