How do I find out if I need 3/8 or 7/16 Rocker Studs?

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caseywan

Member

Apr 7, 2006

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Chicago, IL

Mar 16, 2007

#1

• Mar 16, 2007

• #1

I bought my heads used and they didn't come with rockers, and am trying to figure out which I need, 3/8 or 7/16. They are TFS Twisted Wedge heads, and the following are the only numbers I see on the heads but I can't match them up with anything on TFS's website.

TFS-SBF-1
Pat. No. 587664
63919-2
4058

If anyone could help me out that would be great.

Thanks, Dan

 

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getusummm

Member

Dec 26, 2004

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Mar 16, 2007

#2

• Mar 16, 2007

• #2

do they have rocker studs in them already? if so, then just measure the threaded part. it will be 3/8 or 7/16. if it doesnt have studs, then get some that match whatever rockers you buy. the bases are all 7/16, only the top changes.

 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

15 Year Member

Nov 11, 2003

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Northern KY

Mar 16, 2007

#3

• Mar 16, 2007

• #3

getusummm said:

do they have rocker studs in them already? if so, then just measure the threaded part. it will be 3/8 or 7/16. if it doesnt have studs, then get some that match whatever rockers you buy. the bases are all 7/16, only the top changes.

Click to expand...

If you have the option (like if you haven't bought studs or rockers) you might wanna opt for 7/16, but that doesn't mean the 3/8 are bad or anything.

 

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getusummm

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Dec 26, 2004

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Mar 17, 2007

#4

• Mar 17, 2007

• #4

I agree with getting the 7/16 if you dont already have any. They will hold up better underload with less flex than the 3/8. I dont think you will see much difference in prices.

 

C

caseywan

Member

Apr 7, 2006

157

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Chicago, IL

Mar 18, 2007

#5

• Mar 18, 2007

• #5

Oh ok, I was under the impression that the threaded whole in the head made the difference as to wheter you needed 3/8 or 7/16.

So I take it studs usually don't come with the rockers?