[Fot] Tr6 Race CAr Cam

[Jim Gray]

Chuck,

The duration on that cam seems really long but I’m not a TR6 builder/driver either. 320 degrees seems really long for decent low/mid range. I wonder too if a little more lobe separation wouldn’t do some good too.

Jim g

 

 

From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of Chuck Arnold and/or Kathleen Kelley
Sent: Monday, April 11, 2016 9:30 PM
To: Friends <fot at autox.team.net>; Schumacher <tedtsimx at bright.net>; Sam Halkias <atr6racer at hotmail.com>
Subject: [Fot] Tr6 Race CAr Cam

 

Having now had several successful track outings, I have come to an observation about my car's performance.  It is a petrol injected TR6.  Flowed head, Goodparts header, and cam whose maker I now cannot remember.  320 degrees, .5 lift at valve, and pretty early and long symmetrical input/exhaust valve timing. 104 degrees lobe separation.

 

Car reves past 7000 rpm easily in 4th [4:11 rear end].  The problem is low/midrange torque..  I was slightly out dragged by good Spitfires coming out of turn 10 onto the straight at Laguna.  By turn 1 I was faster than them.  Power comes on too late and torque needs to improve at low end.  Looking for recommendations on a more appropriate duration and input/exhaust open/close timing.

 

More importantly, I need a recommendation for cam vendor/recommended grind.  Had a Kastner S9 in my last [now stolen] car -- but the gentleman who did the grinding  has pasted on and Moon Eyes no longer does them.

 

I know I have not said enough about the current cam -- just I am away from home and do not have the cam grind card with me.

 

 

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