[Fot] Valve Springs - GT6, Spitfire, Tr6

[van.mulders.marcel at telenet.be]

For a TR6 engine, I used Isky valve springs VWE005SP116 With 320lbs/in rate (5.72kgs/mm). With an installed height of 33.8mm and full open height of 21.3mm, seat pressure is 34kgs (about 75 lbs) and 105kgs (230lbs) at full lift. 
So lift is 12.5mm/0.49in and then the seat pressure is already rather low. Coil bind height of these springs is about 18mm so a bit more lift is possible. It there is enough material thickness, the seats for the springs can be reamed out to get the necessary clearance between the windings. 
Marcel 

Van: "fot" <fot at autox.team.net> 
Aan: spitlist at cox.net, "Scott Janzen" <sjanzen at me.com>, "fot" <fot at autox.team.net> 
Verzonden: Donderdag 31 oktober 2019 23:16:13 
Onderwerp: Re: [Fot] Valve Springs - GT6, Spitfire, Tr6 

Try British Frame and Engine. They are not as stiff as the Isky Springs, but can tolerate more lift. Be sure you have adequate seat pressure as well as sufficient pressure at full lift, per your cam specs. These work well with the Tilden 298 cam from Ken Knight. 


-----Original Message----- 
From: JOE CURRY via Fot <fot at autox.team.net> 
To: Scott Janzen <sjanzen at me.com>; Scott Janzen via Fot <fot at autox.team.net> 
Sent: Thu, Oct 31, 2019 4:19 pm 
Subject: Re: [Fot] Valve Springs - GT6, Spitfire, Tr6 

I bought my Isky dual spring set through Ted Schumacher to match his cam that he also sold me. Works great. Talk to him about the details. 



On October 31, 2019 at 11:49 AM Scott Janzen via Fot <fot at autox.team.net> wrote: 

I’m trying to accommodate a high lift cam/rocker combination and the Isky springs (VWE005/SP116) I’ve been using will be right at full bind with this combo. 
What are you all using - I’m looking for something that can handle about 0.54” of net valve lift. 

Let me know what spring mfr/part number you are using and I’ll take it from there. 

Thanks! 




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