Unusual valve springs

B+Bogus · May 30, 2013

HI all,

I'm going through a Combat head - which seems to be in very good shape - and I was a bit surprised to find these lurking inside.
Whoever had it before clearly cared about these things, as it also has titanium collars and some natty Teflon-lined seals on the intakes.
Never seen anything like these before...

Any Ideas?

grandpaul · May 30, 2013

I'll bet they have something to do with the cam, and I'll bet it's not a stock piece...

pete.v · May 30, 2013

I am guessing it's a Comnoz thing. He supplied me with those very nice teflon valve seals.

rvich · May 30, 2013

I am clueless as usual. But it looks like something one would want if they were concerned about the springs interfering with each other on compression. Or to help keep them in column.

Just curious, have you tested them with a scale?

Russ

kommando · May 30, 2013

Looks like some sort of guide to stop the springs bending or bulging out.

comnoz · May 30, 2013

The flat band between the coils is a friction damper. It makes contact with both springs to quell the surge that happens at certain "resonant" frequencies. Normally it is only used with racing type valve springs as it causes wear that shortens the valve spring life.
I have installed springs of that type before -but not for a long time. Jim

Unusual valve springs

B+Bogus

grandpaul

pete.v

rvich

kommando

comnoz

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