RE: Roller rocker arms - Spitfire??

["Vincenti, Ross" <Ross.Vincenti@transamerica.com>]

Clark wrote:
Any thoughts on use of "roller rockers"?
Needle bearing type or bronze bushing?
Clark
++++++++++++++++++
Clark -

Roller rockers are pretty damned expensive for Spits, about $650 or so.  I 
looked at them when rebuilding my 1147cc motor and gasped at the price.  
While nice, and they do help somewhat, at that price they simply are not 
worth it UNLESS you are building a full blown race engine.  For street use 
you would be better off spending $650 on things like some head work, hotter
cam, free flow exhaust and lightened flywheel, suspension upgrade, etc.  
$650 goes a long way......

With respect to bronze bushes between the rockers, on the older Spits (and 
maybe on the later ones, too) Triumph used springs as spacers to keep the 
rocker arms in place.  The springs obviously rely on friction to separate 
the arms and thus the use of precision machined bronze bushings is a good 
relatively inexpensive substitute for the springs.  I know somebody offers 
these, but can't remember who.
Ross D. Vincenti
Asst. General Counsel/Asst. Sec'ty.
Transamerica Home Loan - Legal Dept.
Los Angeles, CA 90015
(213) 742-4756 phone
(213) 741-7231 or 741-6945 fax
ross.vincenti@transamerica.com
64 Spitfire 4
64 Porsche 356C Coupe