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Brian,
The hot running oil pressure of 100 is a little high and you can change this
with modifying the bypass spring pressure. The cold starting oil pressure
issue is more of a concern to me. Are you by chance running an oil cooler
without a thermostatic valve? Different brands of cooler take off heads
circulate the oil in various manners depending on how the by-pass is
engineered into the filter head.
Steve Yott
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Brian
Sent: Wednesday, October 05, 2016 6:10 PM
To: FOT
Subject: [Fot] Gt6 oil pressure?
New motor. 12:1 comp. At cold start up oil pressure fluctuates from
20-60psi. Once warm (approx 180 deg Fahrenheit) pressure is consistent with
rpm increase. At idle hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is
were it will rev during race condition.
Now FYI - this is the first motor by the book with precise measures.
Previously it's been "well this is what I can afford" . Getting older and
get tired working the wheel so thought I'd try something a little different.
My concern is the cold oil psi fluctuation and the higher than previous high
rev psi.
Thoughts please. Before I tow it to northern VT for hill climb next week.
Thanks,
Brian
Foster, RI
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<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Brian,<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
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<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The hot running oil pressure of 100 is a little high and =
you can
change this with modifying the bypass spring pressure. The cold =
starting
oil pressure issue is more of a concern to me. Are you by chance =
running
an oil cooler without a thermostatic valve? Different brands of =
cooler
take off heads circulate the oil in various manners depending on how the
by-pass is engineered into the filter head.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Steve Yott<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
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color:#1F497D'><o:p> </o:p></span></p>
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0in 0in 0in'>
<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Fot
[mailto:fot-bounces@autox.team.net] <b>On Behalf Of </b>Brian<br>
<b>Sent:</b> Wednesday, October 05, 2016 6:10 PM<br>
<b>To:</b> FOT<br>
<b>Subject:</b> [Fot] Gt6 oil pressure?<o:p></o:p></span></p>
</div>
</div>
<p class=3DMsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>New
motor. 12:1 comp. At cold start up oil pressure fluctuates from =
20-60psi. Once
warm (approx 180 deg Fahrenheit) pressure is consistent with rpm =
increase. At
idle hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is were it will =
rev
during race condition. <br>
Now FYI - this is the first motor by the book with precise measures. =
Previously
it's been "well this is what I can afford" . Getting older and =
get
tired working the wheel so thought I'd try something a little different. =
<br>
My concern is the cold oil psi fluctuation and the higher than previous =
high
rev psi.<br>
<br>
Thoughts please. Before I tow it to northern VT for hill climb next =
week.<br>
Thanks, <br>
Brian <br>
Foster, RI<o:p></o:p></span></p>
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http://www.fot-racing.com
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