[Fot] TR4 Valve spring - pressure, assembled height, suppliers

[J.C. Hassall]

On 5/8/2012 2:40 PM, Tim Murphy wrote:
> The machinist doing the work on our cylinder head tells me that we only have
> about 70 pounds of pressure on the seats.  He thinks this is pretty low, in
> his experience with other engines.  He also asked if I had the assembled
> height of the springs, i.e. how much compression when assembled to the head.
> He usually has this spec and shims the spring to obtain the specified
> height.  Lastly, the alloy retainers are pretty beat up and the origin of
> the springs are unknown and he thinks they look questionable.  Who are the
> suppliers of valve springs, retainers, keepers and spring seat hardened
> washers for racing purposes?
>    
Tim, Isky has been one recommended source.  If you go that way, be sure 
they have the matching retainers.  I ordered a set of their springs to 
go with the 777 cam I was using, only to find that they wouldn't fit 
standard TR retainers and they didn't have their own retainers in 
stock.  But if I wanted to order 5K of them, I'd have been good to go.  
Instead, I went to BFE and Ken fixed me up with his springs and 
retainers - great combination.  Good man there.

BTW, I'm using 110# seat pressure.

jim

-- 
Jim Hassall
Blacksburg VA
'63 TR4 in autox preparation
99% finished, 90% to go