W2 head installed valve spring height

I have a new 077 and 933 spring here.

Your chart shows:
933 - [email protected]/[email protected]
077 - [email protected]/[email protected]

My chart shows:
933 - [email protected]/[email protected]
077 - [email protected]/[email protected]

Obviously, taken at face value..... they’re way off from each other.

What they actually test at:
933:
[email protected]
[email protected]
[email protected]
[email protected]
Coil bind @ 1.300

So, that one is pretty close to the specs in my book.

The 077 on the other hand, isn’t even close. Tested with a retainer that has a .100 step for the inner spring:
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
Coil bind 1.200

The 077 spring is listed as for use with the MP590 cam.
If you ran it at 1.860 installed height you’d have not enough seat load, and more open load than really necessary.
It’s just not a good option, IMO.

On the plus side(not really), they’re pretty damn expensive.