Shim or stretch valve springs

Shimmed yes, stretched no. Stretching will yield absolutely nothing as the spring will return to its original, or weaker, rating once being ran.

-Shannon
 
sCREamnClones said:
Both methods are illegal for/in BSP.
Click to expand...

I think he means the valve seal by "shim" which is legal on the exhaust valve.

GoFastHP said:
Shimmed yes, stretched no. Stretching will yield absolutely nothing as the spring will return to its original, or weaker, rating once being ran.

-Shannon
Click to expand...

Agreed^

Stretching is a waste of time..you'll see a change and then it snaps right back. You need to buy a few sets of valves, and retainers...start measuring and swapping valves/retainers and this will get your installed height where you want it..that's for the shimming part of the questin..but stretching part is for pressure..and if you are having a pressure issue or not meeting the 10.8 rule then buy some more springs or different type as streching won't help.
 
Yep..a couple years back before there was an .815 , when the rule was only 10.8 @ .850 I shimmed mine..modified 5/8 flat washer=.060..too bad the springs weren't as good then as they are now.
 
You must log in or register to reply here.
Back
Top