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Chuck,
The duration on that cam seems really long but I=E2=80=99m 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=E2=80=99t do =
some good too.
Jim g
=20
=20
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Chuck Arnold =
and/or Kathleen Kelley
Sent: Monday, April 11, 2016 9:30 PM
To: Friends <fot@autox.team.net>; Schumacher <tedtsimx@bright.net>; Sam =
Halkias <atr6racer@hotmail.com>
Subject: [Fot] Tr6 Race CAr Cam
=20
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.
=20
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.
=20
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.
=20
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.
=20
=20
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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Chuck,<o:p></=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>The duration =
on that cam seems really long but I=E2=80=99m 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=E2=80=99t do some good =
too.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Jim =
g<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
Fot [mailto:fot-bounces@autox.team.net] <b>On Behalf Of </b>Chuck Arnold =
and/or Kathleen Kelley<br><b>Sent:</b> Monday, April 11, 2016 9:30 =
PM<br><b>To:</b> Friends <fot@autox.team.net>; Schumacher =
<tedtsimx@bright.net>; Sam Halkias =
<atr6racer@hotmail.com><br><b>Subject:</b> [Fot] Tr6 Race CAr =
Cam<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p =
class=3DMsoNormal><span style=3D'font-family:"Georgia",serif'>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.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Georgia",serif'><o:p> </o:p></span></p></div><=
div><p class=3DMsoNormal><span style=3D'font-family:"Georgia",serif'>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.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Georgia",serif'><o:p> </o:p></span></p></div><=
div><p class=3DMsoNormal><span =
style=3D'font-family:"Georgia",serif'>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.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Georgia",serif'><o:p> </o:p></span></p></div><=
div><p class=3DMsoNormal><span style=3D'font-family:"Georgia",serif'>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.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Georgia",serif'><o:p> </o:p></span></p></div><=
div><p class=3DMsoNormal><span =
style=3D'font-family:"Georgia",serif'><o:p> </o:p></span></p></div><=
/div></div></body></html>
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_______________________________________________
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http://www.fot-racing.com
Archive: http://www.team.net/archive
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