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

["Greg Solow" <Gregmogdoc@surfnetusa.com>]

A G-3 cam should have over 110 lbs pressure on the seat. With light valves 
and other gear, we use 105 on the seat with an F cam, which has more gentle 
action than a G-3. We use a rev limit of 6800 RPM.  With the "F" cam and 105 
on the seat, the valves will "float" at 7200 rpm.
                                                                            
                           Greg Solow
----- Original Message ----- 
From: "Tim Murphy" <timmurph@fastbytes.com>
To: "'Kas Kastner'" <kaskas@cox.net>
Cc: <ryan.murphy@fdlco.wi.gov>; <fot@autox.team.net>
Sent: Tuesday, May 08, 2012 2:50 PM
Subject: Re: [Fot] TR4 Valve spring - pressure, assembled height, suppliers


> 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@live.com
> [mailto:hotmail_b17abf0a244adefd@live.com] On Behalf Of Kas Kastner
> Sent: Tuesday, May 08, 2012 3:54 PM
> To: timmurph@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@fastbytes.com
> > To: fot@autox.team.net
> > Date: Tue, 8 May 2012 13:40:23 -0500
> > CC: ryan.murphy@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
> > _______________________________________________
> > fot@autox.team.net
> >
> > http://www.fot-racing.com
> >
> > Donate: http://www.team.net/donate.html
> > Archive: http://www.team.net/archive
> > Forums: http://www.team.net/forums
> > Unsubscribe: http://autox.team.net/mailman/options/fot/kaskas@cox.net
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe: 
> http://autox.team.net/mailman/options/fot/gregmogdoc@surfnetusa.com
_______________________________________________
fot@autox.team.net

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe: http://autox.team.net/mailman/options/fot/mharc@autox.team.net