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Re: tr-6 camshaft specs

To: paisley@boulder.nist.gov
Subject: Re: tr-6 camshaft specs
From: "Randell Jesup" <jesup@scala.scala.com>
Date: Mon, 18 Sep 95 17:34:34 EDT
Cc: triumphs@autox.team.net (Triumph Mailing List)
> > Does anyone out there in Triumph-land have the camshaft timing 
>specifications 
> > for a '74 1/2 TR-6 (Engine # CF28236UE); i believe this has the 'later' 
>spec 

>Make           Lift    Timing  Dur     Band            Bhp/L   Bhp
>----           ----    ------  ---     ----            -----   ---
>TR5/6(PI early).360    35 65   280     2500-5500       57      142
>TR6  (PI late) .340    18 58   256     2000-5000       50      126

>Unfortunatly, I don't think this table really answers your question,
>as I don't think any of these specs really match the USA spec'd cars.
>I think this as none of the USA cars had 158 bhp.

        Cams were different, and later TR6's ('72 and later) had low-
compression heads (7.5:1, earlier were 8.5:1).  Later US TR6's had a better
cam, so they didn't lose much HP, though they lost some torque I think.
The later US TR6 cam might be the earlier PI cam.  US TR6 HP was ~105, torque
in the 140+ range.  The Strombergs lose out to FI bigtime above 4000-4500 RPM.

-- 
Randell Jesup, Scala US R&D, Ex-Commodore-Amiga Engineer class of '94
Randell.Jesup@scala.com

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