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

[Tim Murphy]

The cam is a Kastner G3 and the rockers are stock TR4 with 1.55:1 ratio.
The measured cam lift is 0.342 giving a measured valve lift of 0.480 with
0.016 tappet clearance.  This gives an actual ratio of 1.45:1, valve lift +
tappet clearance to cam lift.  We use a "red line" of 6000 RPM.

 

I checked Good Parts but he only lists TR6 parts, at least that I saw.  Are
the TR6 and TR4 valve springs, retainers, keepers and spring seats
interchangeable?

 

Thanks,

 

Tim and Ryan

1961 TR4 #317

 

From: hotmail_b17abf0a244adefd at live.com
[mailto:hotmail_b17abf0a244adefd at live.com] On Behalf Of Kas Kastner
Sent: Tuesday, May 08, 2012 3:54 PM
To: timmurph at fastbytes.com
Subject: RE: [Fot] TR4 Valve spring - pressure, assembled height, suppliers

 

i cannot help you with a parts without a lot of photos which I might not
recognize anyway, BUT, that is way way to low a seat pressrue.  I don' know
your cam, but if it is high lifter from Larry or something like my old G-3
then you want about 125 pounds on the seat.

Never be beaten by equipment
 

> From: timmurph at fastbytes.com
> To: fot at autox.team.net
> Date: Tue, 8 May 2012 13:40:23 -0500
> CC: ryan.murphy at fdlco.wi.gov
> Subject: [Fot] TR4 Valve spring - pressure, assembled height, suppliers
> 
> 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?
> 
> 
> 
> Thanks,
> 
> 
> 
> Tim and Ryan
> 
> 1961 TR4 #317
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