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Re: [TR] J vs D Type Overdrives

To: jmbs46@comcast.net, triumphs@autox.team.net
Subject: Re: [TR] J vs D Type Overdrives
From: ptegler@verizon.net
Date: Mon, 09 May 2016 11:08:58 -0500 (CDT)
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
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<div style=3D"FONT-FAMILY: Arial; COLOR: rgb(0,0,0); FONT-SIZE: 12px"><div>=
you can still purchase j-type mainshafts for the GT6 box. <br />...obviousl=
y this means a total rebuild since you have to restack the gears on the new=
 shaft.<br />the d and j type adapters (mount the o/d to&nbsp; the box) als=
o must be swapped.... and a single rail adapter moded to fit under the shif=
t lever...so hunt down an earlier ('74?) 3 rail j-type adapter (spit versio=
n is fine) <br /><br />current calculations says FIS6 is still around 136hp=
.&nbsp; mild head work and a cam,,,BUT fuel injected.&nbsp; FI does NOT add=
 HP.&nbsp; It only makes the rest of the system more efficient. BUT breathi=
ng losses are less (doesn't have to 'suck' as hard to get fuel mixutres int=
o the cyls...so it HAS to add HP?... much less induction loses involved)<br=
 /></div><div>&nbsp;</div><span>Paul Tegler<br />ptegler@verizon.net<br />w=
ww.teglerizer.com</span><div>&nbsp;</div><div style=3D"border-top:1px solid=
 #bcbcbc;margin:5px 0px;"></div><span style=3D"font-size:12;font-family:ari=
al;color:#000000;">On 05/09/16, <span>Joao Simoes<jmbs46@<span class=3D"mis=
spelled">comcast.net&gt;</jmbs46@<span></span> wrote:</span><div>&nbsp;</di=
v><div style=3D"font-size:12;font-family:arial;color:#000000;">Hello, all.<=
br /><br />As mentioned before, I am building a Spitfire bodied GT6, using =
a 73 GT6 chassis and running gear.<br /><br />I have 2 questions:<br /><br =
/>1- The GT6 has a 3 rail trans that can be mated to a D type overdrive. I =
was told the J- type overdrive is stronger and was used on 74 and later Spi=
tfires with the new, single rail, 'Marina' gearbox.<br />I happen to have b=
oth transmissions and was curious if I could adapt a J type overdrive to go=
 on the 3 rail trans, or use the single rail on the GT6. Any tips?<br /><br=
 />2- I mentioned before I am also building the 2.0 liter inline 6 to be 'w=
armer', hoping for say 130 hp. Any recommendations on a cam and if I would =
need head work, better con rods, induction or exhaust improvements? <br /><=
br />Thanks for any wisdom you can impart. And also does anyone live near t=
he Ann Arbor area?<br /><br />Take care,<br /><br />Joao<br /><br />** <a c=
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