HD12VS springs

jedeka

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Joined
Oct 14, 2009
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1,413
Can you tell me the O.D. of these valve springs? Any work needed to the spring pocket? Thanks.
 
I am on the dyno today, I can get you measurements tomorrow.

They do not require any machining unless you are running a cam with .360" or more lift and you don't have enough installed height.

For the big cams over .360" you need at least 1.880" installed height minimum.

Zach
 
Sorry, been a little hectic. I am working from home tomorrow and won't be in unitl after noon. If you need an answer early call Ryan at 1-512-778-9418 and he will get you all of the info. Otherwise I will get that info later in the afternoon.


Zach
 
Last edited:
1.398" +/- .005 depending on where it is measured. Diesel jet had not had his coffee yet.

Zach
 
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