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I=92m afraid of scuffing too but today I got the manufacturer on the =
phone
twice (different people) and they told me, stay with set clearance.
I asked them why their pistons don=92t expand that much. Answer: Less
expanding aluminum, special shaped for well fitting. They are more oval.
They are made from Mahle. They do F1 pistons also and DTM cars pistons. =
I
hope they should know.
=20
=20
Von: tom strange [mailto:tstrange@sbcglobal.net]=20
Gesendet: Samstag, 20. September 2008 16:02
An: MadMarx
Betreff: Re: [Fot] Nuerburgring Nordschleife 400 km race
=20
Good morning,
I'm curious who are you getting pistons from? =20
I get mine from JE (I use the regular JE import car piston for the =
spit,
not the fancy JE Pros) They call a clearance something like this for =
street
use, and say you can run up to 4 or .0045 for a race application. I =
always
hone to .0055 to .006 clearance and have never had a piston problem. =
You do
get some scuffing with that much clearance, but it has never been a =
problem.
Running them too tight can be a problem. =20
I have had several engine problems over the years but never related to =
the
pistons. (mostly valve issues due to me insisting on designing my own =
cam
profiles and valve train in hopes of engineering myself to the back of =
the
pack ;>)
=20
=20
Tom
http://www.fot-racing.com/spit/caption/tom_strange.htm
#4 white spitfire
--- On Fri, 9/19/08, MadMarx <tr4racing@googlemail.com> wrote:
From: MadMarx <tr4racing@googlemail.com>
Subject: Re: [Fot] Nuerburgring Nordschleife 400 km race
To: "'Friends of Triumph'" <fot@autox.team.net>
Date: Friday, September 19, 2008, 3:41 PM
I have ordered new forged pistons and the manufacturer insists on 0.0024
piston to wall clearance.
=20
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<p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I’m afraid of scuffing too but today I got the =
manufacturer on
the phone twice (different people) and they told me, stay with set =
clearance.<o:p></o:p></span></p>
<p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I asked them why their pistons don’t expand that =
much. Answer:
Less expanding aluminum, special shaped for well fitting. They are more =
oval.<o:p></o:p></span></p>
<p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>They are made from Mahle. They do F1 pistons also and DTM =
cars
pistons. I hope they should know.<o:p></o:p></span></p>
<p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0cm 0cm 0cm'>
<p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>Von:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> tom strange =
[mailto:tstrange@sbcglobal.net]
<br>
<b>Gesendet:</b> Samstag, 20. September 2008 16:02<br>
<b>An:</b> MadMarx<br>
<b>Betreff:</b> Re: [Fot] </span><span =
style=3D'font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>Nuerburgring Nordschleife 400 km =
race<o:p></o:p></span></p>
</div>
<p class=3DMsoNormal><o:p> </o:p></p>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D0 =
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<tr>
<td valign=3Dtop style=3D'padding:0cm 0cm 0cm 0cm'>
<div>
<p class=3DMsoNormal>Good morning,<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal> I'm curious who are you getting =
pistons
from? <o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal> I get mine from JE (I use the regular JE =
import car
piston for the spit, not the fancy JE Pros) They call a =
clearance
something like this for street use, and say you can run up to 4 or =
.0045 for
a race application. I always hone to .0055 to .006 clearance and =
have
never had a piston problem. You do get some scuffing with that =
much
clearance, but it has never been a problem. Running them too =
tight can
be a problem. <o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal> I have had several engine problems over =
the years
but never related to the pistons. (mostly valve issues due to me
insisting on designing my own cam profiles and valve train in hopes of
engineering myself to the back of the pack ;>)<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><br>
<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal>Tom<br>
<br>
<a href=3D"http://www.fot-racing.com/spit/caption/tom_strange.htm";
=
target=3D"_blank">http://www.fot-racing.com/spit/caption/tom_strange.htm<=
/a><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><br>
<br>
#4 white spitfire<o:p></o:p></p>
</div>
<p class=3DMsoNormal><br>
<br>
--- On <b>Fri, 9/19/08, MadMarx =
<i><tr4racing@googlemail.com></i></b>
wrote:<o:p></o:p></p>
<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>From: MadMarx
<tr4racing@googlemail.com><br>
Subject: Re: [Fot] Nuerburgring Nordschleife 400 km race<br>
To: "'Friends of Triumph'" <fot@autox.team.net><br>
Date: Friday, September 19, 2008, 3:41 PM<o:p></o:p></p>
<pre><strong><span style=3D'font-family:"Courier New"'>I have ordered =
new forged pistons and the manufacturer insists on =
0.0024<o:p></o:p></span></strong></pre><pre><strong><span
style=3D'font-family:"Courier New"'>piston to wall =
clearance.<o:p></o:p></span></strong></pre></td>
</tr>
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style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p> =
</o:p></span></p>
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