slowmo934

For some reason my engine builder did not put one under the intake seat??? It looks like I need to order 8 more any idea on part#/where to get? Thanks for the help. Somewhat new to this.


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KCS

iTrader: (20)

Which part are you talking about, the shim (copper color) or the spring locators (black color)?

slowmo934

The copper shim. He installed some beehive springs however, I wanted to step up to a dual spring PRC .650" spring kit. I got the PRC kit and was in the middle of installing it when I noticed these copper shims. I'm at the point now do I go without them or try to find 8 more, or leave it the way it is. They are supper thin and should not change anything. By the way this is a 390 built for boost and that was the reason for going with the dual spring to deal with the pressure better.

vettenuts

iTrader: (4)

It appears the original installer measured the installed spring height and made adjustments to get the correct seat value. If you are going to a different spring, then you need to measure installed height and figure out what shims (if any) are required to obtain the seat force you need for your setup. In other words, but a spring micrometer and take the measurements. Don't just add shims because they were there.

I usually put them in a spreadsheet so I can get all the springs close to each other in seat force.

KCS

iTrader: (20)

To answer that, you would need to know your installed heights and coil bind height. The cam you have now probably has more lift on the exhaust, which is why he didn't put a shim under the exhaust spring.

slowmo934

Crane Z-Cam 224/224 114.

slowmo934

Springs in there now have an install height of 1.800 and the new springs are 1.810" Installed Height. Do I need to worry about shims at all with this little difference?