Todd Montgomery wrote:
> Does anyone know of a source for a hardened rocker shaft for a Spitfire
> 1147? I have needle bearings but I can not run them on a stock shaft.
Can't speak to a hardened shaft, but there is a guy in CA who does a
pretty good job on the stock shaft. Company name is Rocker Arm
Specialist. The contact information is in the monster list.
What he does (for a damned good price, I might add) is take the
stock shaft and rockers and rework them. The stock shaft is checked
for trueness, oil reliefs ground in the rocker area, then
hard-chromes the rocker shaft and installs bronze bushes in the
stock rockers and reams them to fit and radiuses the rocker noses.
Obviously, you need something a bit different than that if you're
running non-stock rockers. But, you might call him and ask if he can
grind and chrome your shaft to properly fit your needle-bearing
rockers. That might be an alternative to finding (or having made) a
high-hardness rocker shaft.
The only concern I would have about chroming is the depth--too thin
a layer of chrome might induce some spalling and flaking.
If you can't find anyone supplying hard-surface shafts, you might
call the guy and explain your needs.
Cheers.
--
Michael D. Porter
Roswell, NM
Never let anyone drive you crazy when you know it's within walking
distance.
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