Subject: [Tigers] Brake & Clutch pedal ratio modification

From: daniel doornbos via Tigers <[email-masked]>
Date: Mon, 28 Jun 2021 19:44:29 +0000

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All, I sent the question last week about the stock 4:1 to 6:1 pedal ratio. =
 Tom H as always has a great solution ready to go and he sent his work deta=
ils.  Tom's solution is great and well-engineered for those not wanting to =
alter the firewall.

I don't mind the firewall modifications and since my car is a body only in =
primer the firewall modification is easy.  Don't look at the photos if you =
don't want to see the cutting of a Tiger.  https://photos.app.goo.gl/aw8dta=
9RoA4uwKRk9

A quick run down of changes.

  *   stock pedal ratio is 4:1, clevis pin hole is 3" from pivot and the pe=
dal is 12" long.
  *   Needed to drill a new 1/4 in hole 2" from pivot (1" higher than stock=
) for the clevis.  I did build up and grind smooth some extra material with=
 the welder to match the thickness
  *   The plan is to use the standard pedal mount top hole in the firewall.
  *   Once the pedal was drilled the pedal bracket needed to be shortened a=
nd the lower mount hole moved up by 1" so I trimmed, drilled and welded the=
 braket to clear the higher clevis pin
  *   For the firewall I've cut a piece of steel plate and traced the stock=
 holes to overlay on the firewall
  *   I cut out two slots in the firewall leaving the perpendicular reinfor=
cement braces to allow for moving up the MCs and pushrods.
  *   I've ordered a 0.7 clutch and 15/16 Brake (Datsun) MC.  Once I have t=
hose and am sure of the mounting hole pieces I'll drill the plate bolt it i=
n place and weld it into position.   Then I need to sort out the pushrod pi=
n length and retention.

I'm really happy with how the work went over the weekend.  Please give any =
feedback if I'm overlooking something critical or if anyone has done anythi=
ng similar.

Also in digging through parts I was trying to decide if I should keep or tr=
ash parts.  Specifically, any reason to keep the original Master Cylinders,=
 Exhaust manifolds, or generator?

thanks for looking
dan

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<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
All, I sent the question last week about the stock 4:1 to 6:1 pedal ratio.&=
nbsp; Tom H as always has a great solution ready to go and he sent his work=
 details.&nbsp; Tom's solution is great and well-engineered for those not w=
anting to alter the firewall.</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);">
I don't mind the firewall modifications and since my car is a body only in =
primer the firewall modification is easy.&nbsp; Don't look at the photos if=
 you don't want to see the cutting of a Tiger.&nbsp;&nbsp;<a href=3D"https:=
//photos.app.goo.gl/aw8dta9RoA4uwKRk9" id=3D"LPlnk" style=3D"font-family: C=
alibri, Helvetica, sans-serif; font-size: 12pt;">https://photos.app.goo.gl/=
aw8dta9RoA4uwKRk9</a></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);">
A quick run down of changes.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<ul>
<li><span><span style=3D"color: rgb(0, 0, 0); font-family: Calibri, Helveti=
ca, sans-serif; font-size: 12pt;">stock pedal ratio is 4:1, clevis pin hole=
 is 3&quot; from pivot and the pedal is 12&quot; long.&nbsp;&nbsp;</span></=
span></li><li><span><span style=3D"color: rgb(0, 0, 0); font-family: Calibr=
i, Helvetica, sans-serif; font-size: 12pt;">Needed to drill a new 1/4 in ho=
le 2&quot; from pivot (1&quot; higher than stock) for the clevis.&nbsp; I d=
id build up and grind smooth some extra material with the welder
 to match the thickness&nbsp;</span></span></li><li><span><span style=3D"co=
lor: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: =
12pt;">The plan is to use the standard pedal mount top hole in the firewall=
.</span></span></li><li><span><span style=3D"color: rgb(0, 0, 0); font-fami=
ly: Calibri, Helvetica, sans-serif; font-size: 12pt;">Once the pedal was dr=
illed the pedal bracket needed to be shortened and the lower mount hole mov=
ed up by 1&quot; so I trimmed, drilled and welded the braket
 to clear the higher clevis pin</span></span></li><li><span><span style=3D"=
color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size=
: 12pt;">For the firewall I've cut a piece of steel plate and traced the st=
ock holes to overlay on the firewall</span></span></li><li><span><span styl=
e=3D"color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font=
-size: 12pt;">I cut out two slots in the firewall leaving the perpendicular=
 reinforcement braces to allow for moving up the MCs and pushrods.&nbsp;&nb=
sp;</span></span></li><li>I've ordered a 0.7 clutch and 15/16 Brake (Datsun=
) MC.&nbsp; Once I have those and am sure of the mounting hole pieces I'll =
drill the plate bolt it in place and weld it into position.&nbsp; &nbsp;The=
n I need to sort out the pushrod pin length and retention.</li></ul>
<div><br>
</div>
<div>I'm really happy with how the work went over the weekend.&nbsp; Please=
 give any feedback if I'm overlooking something critical or if anyone has d=
one anything similar.</div>
<div><br>
</div>
<div>Also in digging through parts I was trying to decide if I should keep =
or trash parts.&nbsp; Specifically, any reason to keep the original Master =
Cylinders, Exhaust manifolds, or generator?&nbsp;&nbsp;</div>
<div><br>
</div>
<div>thanks for looking</div>
<div>dan</div>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
</body>
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