Re: [Fot] Rebuild

[fubog1 via Fot <fot@autox.team.net>]

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  Welcome Rod, looks like you got baptized into the cult of racing TRs...!T=
hat engine probably has more wrong with it than the obvious hole in the pis=
ton and 0-ring seal damage between #1 & 2.The 1st thing that you might do i=
s to read all of the late, great Kas Ks books, all you could ever want to k=
now about Spitfires.
Re spare engine, just a few points-I would go with a conservative mild-spec=
 engine to start with so you can get some seat time; doing a full-race spec=
 will guarantee that you spend more time in the pits than on track.The rear=
 gear ratio will determine RPM range, so if it has a 4.10 it'll be pretty "=
buzzy", =3D shorter service life.
As mentioned, use good parts, rods, pistons, bearings, etc.Pay very close a=
ttention to clearances during assembly.Balance all recip & rotating.
Crank thrust is weak area, several mods can be done.I advise accusump & obe=
rg be fitted.Crack-check the crank on a regular basis, TBD by RPM range you=
 run.Driveline-The gearbox is a POS.Use GT-6 gears for good ratio but it's =
still a POS.Driveshafts are VERY sensitive to imbalance, make sure it's don=
e right.
NOTE-Rear axles are more important than ANYTHING else on a racing Spitfire,=
 when one breaks you're likely going over, and we have numerous members of =
that club right here.
I wouldn't consider putting a Spit on track for serious competition w/stock=
 axles, and the availability of replacements is limited.
Also once all is done get the car on a good maintenance & inspection progra=
m.
Just a few points to consider that may help maximize track time, hope it he=
lps, others will jump in with more.
Glen Efinger
ps- attaching a copy of my checklist, don't know if it will work, if not em=
ail me if you want a copy
=20
=20
-----Original Message-----
From: Rod Pierce via Fot <fot@autox.team.net>
To: fot@autox.team.net
Sent: Sun, May 2, 2021 7:57 am
Subject: [Fot] Rebuild

Hello Everyone,
I am a new member and new to racing Spitfires.=C2=A0 In fact, my first expe=
rience with racing, competition school in Waterford MI, didn't=C2=A0 end we=
ll for my engine (see attachment).
I am planning to rebuild an extra small journal 1300 and I am requesting ad=
vise from the very knowledgeable people on this site.=C2=A0 I have all the =
spare engine parts I could ever need and a great machine shop near by so ma=
inly I am interested on advice on where to buy parts( pistons, rods ,rings =
etc..).
There are many sources on the internet but since I have never built one of =
these before I am interested in your input.
Also, while I'm at it, I would like to improve my transmission and rearend.=
=C2=A0 I am open to anything from minor improvement to a complete swap of m=
y transmission or rearend.
Thanks for you help.
























































































   =C2=A0 engine.jpg   =20
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<div style="color:black;font: 10pt Arial, Helvetica, sans-serif;">
<div> 
<div> <font size="2">Welcome Rod, looks like you got baptized into the cult of 
racing TRs...!</font></div>

<div><font size="2">That engine probably has more wrong with it than the 
obvious hole in the piston and 0-ring seal damage between #1 &amp; 
2.</font></div>

<div><font size="2">The 1st thing that you might do is to read all of the late, 
great Kas Ks books, all you could ever want to know about Spitfires.<br>
</font></div>

<div><font size="2">Re spare engine, just a few points-</font></div>

<div><font size="2">I
 would go with a conservative mild-spec engine to start with so you can 
get some seat time; doing a full-race spec will guarantee that you spend
 more time in the pits than on track.</font></div>

<div><font size="2">The rear gear ratio will determine RPM range, so if it has 
a 4.10 it'll be pretty "buzzy", = shorter service life.<br>
</font></div>

<div><font size="2">As mentioned, use good parts, rods, pistons, bearings, 
etc.</font></div>

<div><font size="2">Pay very close attention to clearances during 
assembly.</font></div>

<div><font size="2">Balance all recip &amp; rotating.<br>
</font></div>

<div><font size="2">Crank thrust is weak area, several mods can be 
done.</font></div>

<div><font size="2">I advise accusump &amp; oberg be fitted.</font></div>

<div><font size="2">Crack-check the crank on a regular basis, TBD by RPM range 
you run.</font></div>

<div><font size="2">Driveline-</font></div>

<div><font size="2">The gearbox is a POS.</font></div>

<div><font size="2">Use GT-6 gears for good ratio but it's still a 
POS.</font></div>

<div><font size="2">Driveshafts are VERY sensitive to imbalance, make sure it's 
done right.</font></div>

<div><font size="2"><br>
</font></div>

<div><font size="2">NOTE-</font></div>

<div><font size="2">Rear
 axles are more important than ANYTHING else on a racing Spitfire, when 
one breaks you're likely going over, and we have numerous members of 
that club right here.<br>
</font></div>

<div><font size="2">I wouldn't 
consider putting a Spit on track for serious competition w/stock axles, 
and the availability of replacements is limited.</font></div>

<div><font size="2"><br>
</font></div>

<div><font size="2">Also</font><font size="2"> once all is done g</font><font 
size="2"><font size="2">et the car on a good maintenance &amp; inspection 
program.</font></font></div>

<div><font size="2"><br>
</font></div>

<div><font size="2">Just a few points to consider that may help maximize track 
time, hope it helps, others will jump in with more.</font></div>

<div><font size="2"><br>
</font></div>

<div><font size="2">Glen Efinger<br>
</font></div>
<font size="2">ps- attaching a copy of my checklist, don't know if it will 
work, if not email me if you want a copy<br>
</font></div>

<div> <br>
</div>

<div> <br>
</div>

<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font 
size="2">-----Original Message-----<br>
From: Rod Pierce via Fot &lt;fot@autox.team.net&gt;<br>
To: fot@autox.team.net<br>
Sent: Sun, May 2, 2021 7:57 am<br>
Subject: [Fot] Rebuild<br>
<br>

<div id="yiv4841547360">
<div>Hello Everyone,
<div><br>
</div>

<div>I am a new member and new to racing Spitfires.&nbsp; In fact, my first 
experience with racing, competition school in Waterford MI, didn't&nbsp; end 
well for my engine (see attachment).</div>

<div><br>
</div>

<div>I am planning to rebuild an extra small journal 1300 and I am requesting 
advise from the very knowledgeable people on this site.&nbsp; I have all the 
spare engine parts I could ever need and a great machine shop near by so mainly 
I am interested on advice on where to buy parts( pistons, rods ,rings 
etc..).</div>

<div><br>
</div>

<div>There are many sources on the internet but since I have never built one of 
these before I am interested in your input.</div>

<div><br>
</div>

<div>Also, while I'm at it, I would like to improve my transmission and 
rearend.&nbsp; I am open to anything from minor improvement to a complete swap 
of my transmission or rearend.</div>

<div><br>
</div>

<div>Thanks for you help.</div>

<div><br>
</div>

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</div>

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