[Fot] Dual Valve Springs

[Tylerpthompson at yahoo.com]

I had a miss at high rpms.  My distributor had a lot of wobble at the top of
the shaft so replaced it. Although it ran stronger at low speeds, the miss at
high rpms was still there. I pulled the valve cover and found the number 4
inner valve spring was broken. Thanks to Jim Gray (again) for suggesting I
check this.

I am wondering what may have caused this.  I am also wondering if I should
pull the head to see if it caused any damage but since it ran very smooth at
low rpms, I am thinking I was just getting some valve float at high rpms.

I am going to replace all the springs at this point to make sure.  I think I
can raise the piston to TDC for each cylinder, and use the valve spring
compressor for on head removal.  Have others done spring replacements this way
or should I just pull the head?

Finally, what springs do folks use?  In searching the web, it seems rare to
see a valve spring break, but I have not heard what experiences other FOT
users have had. I have a Paeco 6600 rpm cam, titanium retainers, and chrome
moly push rods as well as a rebuilt rocker assembly, but those roller rockers
sure do look nice!

Thanks in advance for your helpful advice and Happy Fathers Day to all the
dads out there.

Ty


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