do I need a stud girdle?

jerry S

New Member

Sep 3, 2003

1,365

1

0

52.22N 5.12E

Jun 29, 2005

#1

• Jun 29, 2005

• #1

I am upgrading to full roller rockers. I have 3/8 screw in studs on my RPM Performers. It has been suggested to me to put a stud girdle on while I am at it. I don't turn past 6300 rpms. At what point would a stud girdle be recommended?

 

HistoricMustang

Active Member

Apr 11, 2003

2,359

0

46

Confederate States of America

Jun 29, 2005

#2

• Jun 29, 2005

• #2

jerry S said:

I am upgrading to full roller rockers. I have 3/8 screw in studs on my RPM Performers. It has been suggested to me to put a stud girdle on while I am at it. I don't turn past 6300 rpms. At what point would a stud girdle be recommended?

Click to expand...

IMHO they are not needed unless you run top RPM's for extended periods or do the serious 1/4 mile stuff.

I have never put them on my road racer as my personal feeling is that they help retain heat in the valve train which is not needed.

However, they sure look cool!

HistoricMustang
www.historicmustang.com

 

G

grego37

New Member

May 12, 2004

576

0

0

Fresno CA

Jun 29, 2005

#3

• Jun 29, 2005

• #3

not needed, save your $$

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

6

0

south louisiana

Jun 29, 2005

#4

• Jun 29, 2005

• #4

If anything you could have gone with 7/16" studs. Those would be more appropriate than a stud girdles. Unless you've already ordered or bought the rockers, you'd do well to get the larger studs.

 

HistoricMustang

Active Member

Apr 11, 2003

2,359

0

46

Confederate States of America

Jun 29, 2005

#5

• Jun 29, 2005

• #5

D.Hearne said:

If anything you could have gone with 7/16" studs. Those would be more appropriate than a stud girdles. Unless you've already ordered or bought the rockers, you'd do well to get the larger studs.

Click to expand...

Good point "D".

When I upgraded from 3/8" to 7/16", half of the smaller were bent.

HistoricMustang
www.historicmustang.com

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

6

0

south louisiana

Jun 29, 2005

#6

• Jun 29, 2005

• #6

For me it was a no-brainer when it came to picking studs for my Canfield heads. The only drawback to 7/16 on a small block was there's a smaller choice in roller rockers that fit 7/16" studs. Especially when you're looking for 1.7 rockers. But they are out there. I went with Comp Cams 1.7 rockers in their "engine builder's" line. These aren't listed in the retailer's catalogs, they're a few dollars less than their retail line. I think mine were $230 for the set.

 

jerry S

New Member

Sep 3, 2003

1,365

1

0

52.22N 5.12E

Jun 30, 2005

#7

• Jun 30, 2005

• #7

I would like to clarify; are you suggesting that I

1. tap the threads in the cylinder head and rethread to 7/16? or
2. get a combo stud with a 3/8 base thread and a 7/16 rocker arm thread?

 

rbohm

Founding Member

Apr 12, 2002

6,698

550

204

tucson,az

Jun 30, 2005

#8

• Jun 30, 2005

• #8

all of this is a moot point if you are not running excessive valve spring pressures. if your springs have no more than around 300lbs and max lift, you are fine even with 3/8" studs. if you opt for 7/16" studs you will need to open up the holes the studs reside in now to 7/16 threads.

 

jerry S

New Member

Sep 3, 2003

1,365

1

0

52.22N 5.12E

Jun 30, 2005

#9

• Jun 30, 2005

• #9

rbohm said:

all of this is a moot point if you are not running excessive valve spring pressures. if your springs have no more than around 300lbs and max lift, you are fine even with 3/8" studs. if you opt for 7/16" studs you will need to open up the holes the studs reside in now to 7/16 threads.

Click to expand...

ARP has a stud that has a 3/8 base and a 7/16 rocker arm thread, part number ARP-135-7102. The price of the studs is the same as for the 3/8 top and bottom stud and the price for the comp. cams 1.6 ratio pro magnum roller rocker is the same whether I get it in 3/8 or 7/16. Is the 3/8 bottom/7/16 top stud stronger than the 3/8 top and bottom stud? If so, with the price being equal, why not get the combo stud since I still have to purchase?

[edit]

well, I just priced the studs. $31.90 for 2. I need 16, which means an extra $255. I am already at $265 for the roller rockers and $200 for the chrome valve covers. Looks like I am sticking with the 3/8 ones that are in there.

 

HistoricMustang

Active Member

Apr 11, 2003

2,359

0

46

Confederate States of America

Jun 30, 2005

#10

• Jun 30, 2005

• #10

jerry S said:

Looks like I am sticking with the 3/8 ones that are in there.

Click to expand...

Jerry, you will be just fine.

HistoricMustang
www.historicmustang.com

 

Attachments

• banner5270x457bw.webp

  2.8 KB · Views: 140

jerry S

New Member

Sep 3, 2003

1,365

1

0

52.22N 5.12E

Jun 30, 2005

#11

• Jun 30, 2005

• #11

HistoricMustang said:

Jerry, you will be just fine.

HistoricMustang
www.historicmustang.com

Click to expand...

If it comes from you H, then it is Gospel. THanks to everybody for your advice and input. I will stick with the studs that came with the heads and pop the rocker arms on there along with the new valve covers and be happy.

regards,

jerryS: another Stangnet tech forum satisfied customer.

 

Attachments

• banner5270x457bw.webp

  2.8 KB · Views: 157

D

D.Hearne

New Member

Sep 29, 2000

11,730

6

0

south louisiana

Jun 30, 2005

#12

• Jun 30, 2005

• #12

rbohm said:

all of this is a moot point if you are not running excessive valve spring pressures. if your springs have no more than around 300lbs and max lift, you are fine even with 3/8" studs. if you opt for 7/16" studs you will need to open up the holes the studs reside in now to 7/16 threads.

Click to expand...

NO, no , no , no, ALL screw in studs have 7/16" bottom threads. The 3/8" studs are 3/8" on top, 7/16" on bottom. Any head that's drilled and tapped for screw in studs will accept either one. So in effect that's why I suggested he go with 7/16" studs, they cost the same, but the 7/16" studs are much stronger. Now, if he's already bought the 3/8" rockers, he might as well keep them and use 3/8" studs. If not, it cost's nothing more to go with 7/16". Studs are the same price as are the rockers.

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

6

0

south louisiana

Jun 30, 2005

#13

• Jun 30, 2005

• #13

Ok, I was wrong, some studs have 1/2" bases, some ( very few) have 3/8" bases. I'll bet your Performer RPMs have 7/16" bottom threads. My Canfields have 7/16" threads in the head.

 

jerry S

New Member

Sep 3, 2003

1,365

1

0

52.22N 5.12E

Jun 30, 2005

#14

• Jun 30, 2005

• #14

D.Hearne said:

Ok, I was wrong, some studs have 1/2" bases, some ( very few) have 3/8" bases. I'll bet your Performer RPMs have 7/16" bottom threads. My Canfields have 7/16" threads in the head.

Click to expand...

I have verified that I have 7/16 bottoms and 3/8 tops. I am satisfied that I don't need to upgrade.