--===============4241003767851539213==
Content-Language: en-US
boundary="_000_IA0PR10MB6891605991AE05E6B507D18887D3AIA0PR10MB6891namp_"
--_000_IA0PR10MB6891605991AE05E6B507D18887D3AIA0PR10MB6891namp_
Content-Transfer-Encoding: quoted-printable
This is interesting... As I understand it, the input gear drives the laysha=
ft. Lock the input to the output and you have 1:1 4th gear. To make a clos=
e ratio box, they could have changed the input-layshaft ratio, in which cas=
e the input shafts would not be interchangeable between the spit and GT6, b=
ut the 1-3 gear sets could be. Alternately they could also use the same inp=
ut-layshaft gearset and then change the three lower ratio gearsets. In the=
latter case the input shafts could indeed be interchangeable...
If you look at the 1-3 ratios in Joe's link, the Spit and GT6 ratios do not=
scale by a fixed factor - indicating it is not simply a change of input-la=
yshaft ratio. This means that the 1-3 gearsets are different, and the input=
-layshaft could be common. Of course it's also possible they changed both t=
he layshaft and the 1-3 ratios..
Thank you,
Andrew
________________________________
From: Fot <fot-bounces@autox.team.net> on behalf of Barr, Scott via Fot <fo=
t@autox.team.net>
Sent: Thursday, October 12, 2023 10:35 AM
To: JOE CURRY <spitlist@cox.net>; Barr, Scott via Fot <fot@autox.team.net>;=
Rod Pierce <rpierce141@gmail.com>
Subject: Re: [Fot] GT6-Spitfire Transmission Conversion
And yet it worked fine. Perfectly. Go figure.
Scott (B.)
From: JOE CURRY <spitlist@cox.net>
Sent: Thursday, October 12, 2023 9:33 AM
To: Barr, Scott <sbarr@McCarty-Law.com>; Barr, Scott via Fot <fot@autox.tea=
m.net>; Rod Pierce <rpierce141@gmail.com>
Subject: Re: [Fot] GT6-Spitfire Transmission Conversion
Since the GT6 gearbox has a different gearset than the Spitfire has, I can'=
t see how that would work. The first gear for the 3-rail Spitfire has a ra=
tio of 3.75 compared to 2.65 for the GT6, therefore the input shaft gear wo=
n't mesh with the gears in the GT6 box. Here is a link to the summary of w=
hat I did way back in 2000 when I adapted a Mk3 GT6 gearbox to work with a =
small journal 1296 that I used in my autocross prepared Mk1 Spit: https://=
www.geocities.ws/MotorCity/Speedway/1080/gt6boxtospit.html.
Joe
t@autox.team.net>> wrote:
When I had this done some years ago, I took the job to a local racer-transm=
ission guy. After fiddling with it a bit, he just put the Spitfire input s=
haft into the GT6 trans and it worked fine. GT6 gearbox for my Spit racer,=
no cutting, welding, etc. required. It worked great for a few seasons unt=
il I pulled it to install an overdrive trans.
Could just be luck? I understand that there are a number of variations of =
gear constructions and maybe I just happened to bring him two that matched?=
Who knows. But it worked for me.
Scott (B.)
n Behalf Of Rod Pierce via Fot
Sent: Thursday, October 12, 2023 7:57 AM
Subject: [Fot] GT6-Spitfire Transmission Conversion
I have a GT6 transmission in my spares collection and I have heard they can=
be converted to run in a Spitfire.
I'm interested in accomplishing this over the winter and I am looking for i=
nformation/advice on the best way to do it.
It is my understanding that you can have the GT6 input shaft either machine=
d to fit or you can cut the input shafts from a GT6 and a Spitfire and weld=
the Spitfire on the GT6 transmission.
Thanks
_______________________________________________
http://www.fot-racing.com<http://www.fot-racing.com/>
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
net
--_000_IA0PR10MB6891605991AE05E6B507D18887D3AIA0PR10MB6891namp_
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
This is interesting... As I understand it, the input gear drives the laysha=
ft. Lock the input to the output and you have 1:1 4<sup>th</sup> gear.=
To make a close ratio box, they could have changed the input-layshaf=
t ratio, in which case the input shafts would
not be interchangeable between the spit and GT6, but the 1-3 gear sets cou=
ld be. Alternately they could also use the same input-layshaft gearse=
t and then change the three lower ratio gearsets. In the latter case the in=
put shafts could indeed be interchangeable... </div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
If you look at the 1-3 ratios in Joe's link, the Spit and GT6 ratios do not=
scale by a fixed factor - indicating it is not simply a change of input-la=
yshaft ratio. This means that the 1-3 gearsets are different, and the input=
-layshaft could be common. Of course
it's also possible they changed both the layshaft and the 1-3 ratios..</di=
v>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
</div>
<div id=3D"Signature">
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
Thank you,</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
 =
; Andrew</div>
</div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
<br>
</div>
<hr style=3D"display: inline-block; width: 98%;">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><span style=3D"font-family: Calibri, =
sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Fot &l=
t;fot-bounces@autox.team.net> on behalf of Barr, Scott via Fot <fot@a=
utox.team.net><br>
<b>Sent:</b> Thursday, October 12, 2023 10:35 AM<br>
<b>To:</b> JOE CURRY <spitlist@cox.net>; Barr, Scott via Fot <=
;fot@autox.team.net>; Rod Pierce <rpierce141@gmail.com><br>
<b>Subject:</b> Re: [Fot] GT6-Spitfire Transmission Conversion</span>
<div> </div>
</div>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">And yet it worked fine. Perfectly. Go figure.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">Scott (B.)</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<div style=3D"padding: 3pt 0in 0in; border-top: 1pt solid rgb(225, 225, 225=
);">
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"><b>From:</b> JOE CURRY <spitlist@cox.net><br>
<b>Sent:</b> Thursday, October 12, 2023 9:33 AM<br>
<b>To:</b> Barr, Scott <sbarr@McCarty-Law.com>; Barr, Scott via =
Fot <fot@autox.team.net>; Rod Pierce <rpierce141@gmail.com><br>
<b>Subject:</b> Re: [Fot] GT6-Spitfire Transmission Conversion</p>
</div>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">Since the GT6 gearbox has a different gearset than the Spitfire has, I ca=
n't see how that would work. The first gear for the 3-rail Spitfire h=
as a ratio of 3.75 compared to 2.65 for
the GT6, therefore the input shaft gear won't mesh with the gears in the G=
T6 box. Here is a link to the summary of what I did way back in 2000 =
when I adapted a Mk3 GT6 gearbox to work with a small journal 1296 that I u=
sed in my autocross prepared Mk1 Spit:
<a href=3D"https://www.geocities.ws/MotorCity/Speedway/1080/gt6boxto=
spit.html" id=3D"OWA0d86b803-bd25-ff79-4fe6-154fa4c6d0e5" class=3D"OWAAutoL=
ink" shash=3D"AR4Y5bYgph9Dsip74/9TkobXNifULdCtd0nhT5zOZcQ4XVcWZZ8AZjTGC9mtG=
yA1VVwMPZ8r/oG2sMYcM87kqCxAZAs69Yv+YS18RS7q8i/z9tgF/t9CVc2iyUYOM3DiKaoYPP8I=
lCLbhjKh1DRrfi/oKZ4PJEN+vb1f1xwK4rk=3D" originalsrc=3D"https://www.geocitie=
s.ws/MotorCity/Speedway/1080/gt6boxtospit.html" data-auth=3D"Verified" styl=
e=3D"margin-top: 0px; margin-bottom: 0px;">https://www.geocities.ws/MotorCi=
ty/Speedway/1080/gt6boxtospit.html</a>.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">Joe</p>
<blockquote style=3D"margin-top: 5pt; margin-bottom: 5pt;">
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">On 10/12/2023 9:31 AM EDT Barr, Scott via Fot <<a href=3D"mailto:fot@a=
utox.team.net" id=3D"OWA08b5827b-34b6-1756-6f02-1105b8ca7af9" class=3D"OWAA=
utoLink" style=3D"margin-top: 0px; margin-bottom: 0px;">fot@autox.team.net<=
/a>>
wrote:</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">When I had this done some years ago, I took the job to a local racer-tran=
smission guy. After fiddling with it a bit, he just put the Spitfire =
input shaft into the GT6 trans and it worked
fine. GT6 gearbox for my Spit racer, no cutting, welding, etc. requi=
red. It worked great for a few seasons until I pulled it to install a=
n overdrive trans.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">Could just be luck? I understand that there are a number of variati=
ons of gear constructions and maybe I just happened to bring him two that m=
atched? Who knows. But it worked for
me.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">Scott (B.)</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<div style=3D"padding: 3pt 0in 0in; border-top: 1pt solid rgb(225, 225, 225=
);">
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"><b>From:</b> Fot <<a href=3D"mailto:fot-bounces@autox.team.net"; i=
d=3D"OWA4e1d1880-8bf4-da35-6bb9-acb65e8c1ebe" class=3D"OWAAutoLink" style=
=3D"margin-top: 0px; margin-bottom: 0px;">fot-bounces@autox.team.net</a>>=
;
<b>On Behalf Of </b>Rod Pierce via Fot<br>
<b>Sent:</b> Thursday, October 12, 2023 7:57 AM<br>
<b>To:</b> Rod Pierce via Fot <<a href=3D"mailto:fot@autox.team.net=
" id=3D"OWA32dca18e-9eda-cee0-f2ec-b97a62cc3d00" class=3D"OWAAutoLink" styl=
e=3D"margin-top: 0px; margin-bottom: 0px;">fot@autox.team.net</a>><br>
<b>Subject:</b> [Fot] GT6-Spitfire Transmission Conversion</p>
</div>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">I have a GT6 transmission in my spares collection and I have heard they c=
an be converted to run in a Spitfire. </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">I'm interested in accomplishing this over the winter and I am looking for=
information/advice on the best way to do it.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">It is my understanding that you can have the GT6 input shaft either machi=
ned to fit or you can cut the input shafts from a GT6 and a Spitfire and we=
ld the Spitfire on the GT6 transmission.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
">Thanks</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
"> </p>
<p style=3D"margin: 0in 0in 12pt; font-family: Calibri, sans-serif; font-si=
ze: 11pt;">
_______________________________________________<br>
<a href=3D"mailto:fot@autox.team.net"; id=3D"OWA7dcb56e7-fb97-0d16-30ed-1dd9=
bad86d1a" class=3D"OWAAutoLink" style=3D"margin-top: 0px; margin-bottom: 0p=
x;">fot@autox.team.net</a><br>
<br>
<a href=3D"http://www.fot-racing.com/"; id=3D"OWAea9a551a-f537-60f7-a7de-168=
415f54798" class=3D"OWAAutoLink" shash=3D"EslrTjg+KbLJ9zB0hqDg52pY8XUZjgKKl=
cHUWdC51qO/R9+rN/Eieb622vJmB+i1K48gvupR2jHdwrcvt86V5HZTYS8S3aJCCXjBIr1YmIXo=
marsZQrk4vsBvO29bl3IWuowmnNbgIMCBOYSRORd0inrlFbFNwd2YL54zr2FWgQ=3D" origina=
lsrc=3D"http://www.fot-racing.com/"; data-auth=3D"Verified" style=3D"margin-=
top: 0px; margin-bottom: 0px;">http://www.fot-racing.com</a><br>
<br>
b60f-8681-27344c760200" class=3D"OWAAutoLink" shash=3D"Jx0mzLTDRmV8OA5wHBTA=
pAqoiv57jt7MVTxZn5jz3gQbrKJh9boejPlKnJIfNg0ELqh78RzvsuVQKiBQLQWc08OgX71FyiH=
3hnrKBgapWfU7DDlI9hnmFRd1hKj7ZwzlAIWk60FWBOFn+qeM1/ncNKap7hmh0jG9FMeZh9eY65=
0=3D" originalsrc=3D"http://www.team.net/donate.html"; data-auth=3D"Verified=
" style=3D"margin-top: 0px; margin-bottom: 0px;">
Archive: <a href=3D"http://autox.team.net/archive"; id=3D"OWA92a1acf4-51a8-4=
832-e5f5-7b87f53e5891" class=3D"OWAAutoLink" shash=3D"dKuWMROyY9Sf8V5ARcmMt=
HUiJL7lg02dTZM9Oyu/BM/jhM8YO+cB0pWSnPYXYed7XOOYRzQfM1XjZByxPrHAZWclNkeFy4MK=
iSj7YFgUe/0Q+2Aah3QO+p9OjqTCnxghmd8b1hc8uCamJo2Ke5T98R9RBLznCe4kt9VsLxxVTlM=
=3D" originalsrc=3D"http://autox.team.net/archive"; data-auth=3D"Verified" s=
tyle=3D"margin-top: 0px; margin-bottom: 0px;">
http://autox.team.net/archive</a> <a href=3D"http://www.team.net/pipermail/=
fot" id=3D"OWA8b6c7bc8-c227-6ca2-c5ae-ffcb0a4057b8" class=3D"OWAAutoLink" s=
hash=3D"Mr4TmNFzE4fOAYtAWilJuGLsHz62jHMWcdd0keN4ylRQaKFIMWivDiMMGxYb93rtJXH=
/o38XGc38mV1JGIqdsHo9oVGcCDZ/1izBCm5Eg1zX3bn7Xlf1M6YZL5xY+/vV0pC4J12NrfJpDf=
zLTd1jE9vlOrWftMbJyoZ7OGHrnGU=3D" originalsrc=3D"http://www.team.net/piperm=
ail/fot" data-auth=3D"Verified" style=3D"margin-top: 0px; margin-bottom: 0p=
x;">
http://www.team.net/pipermail/fot</a><br>
itlist@cox.net" id=3D"OWA7b86e523-b43b-5db0-489a-0c82cc1c5a93" class=3D"OWA=
AutoLink" shash=3D"BUBHsKOE/8pxSsGACaGs6GH+PNcbVH/h/yJo0aQnx8TJ/qX5xcY9o/2Z=
kjXQAMsStrBcOGWjn+Ty6fWYHnRFyBnzcCHKc+yn3w/RbglqjH/PGhxAfEwTa2K0ZJqbEpt3zqL=
8u4jdYxZp1+XsyMsz14Lq2FoulwdYxg0WQV5TceI=3D" originalsrc=3D"http://autox.te=
am.net/mailman/options/fot/spitlist@cox.net" data-auth=3D"Verified" style=
=3D"margin-top: 0px; margin-bottom: 0px;">
http://autox.team.net/mailman/options/fot/spitlist@cox.net</a><br>
<br>
</p>
</blockquote>
</body>
</html>
--_000_IA0PR10MB6891605991AE05E6B507D18887D3AIA0PR10MB6891namp_--
--===============4241003767851539213==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
--===============4241003767851539213==--
|