I'd disagree on the Earlier Head and Manifolds being better, It's my
understanding the later Heads flow better. The only bad thing about the
post 74 Exhaust
Manifold is the EGR injectors pissing in the wind. A late Head is basically
the P/I Head
cast thicker to allow for deeper Combustion Chambers knocking the
compression down to 7:75 to 1 or
whatever. This is easily overcome by machining the Head to the desired C/R.
Most
believe the Circle B and Diamond W Head Castings are the best starting
point for a modified
Engine. Of course this makes the late Intake Manifold needed if you stay
with 2 CV Carbs.Which is said to flow better
I think the older Carbs are better too.
. The only other differences is if someone wants to change the Cam. I
used a 74 Exhaust Manifold, plugged the Emissions Pipe Port on the Intake,
Changed the
Stromberg's with SU's w/K&N's and put in a Pertronix, and it had the ANSA
Dual Exhaust when I got it. No
Rocket Ship but she goes sweet, and gets 24 mpg on the Country Roads I
bring her to work
daily on. I kept the C/R stock when I had the Head off. 87 Octane agrees
with her fine @ 10 degrees BTDC Timing.
Cheers,
Wayne Lee
64 TR4
75 TR6
> ----- Original Message -----
> From: "oliver" <sumton@sbcglobal.net>
> To: <Triumphs@autox.team.net>
> Sent: Thursday, April 09, 2009 1:45 PM
> Subject: Re: [TR] [6pack] Karmann declares bankruptcy
>
>
>> Jim - you are very correct on the tr250, but if you don't mind allow me
>> to expand on the tr6.
>>
>> rumor has it that some of the delay was "translating" the car into SAE
>> because Karmann did the whole car in metric.
>>
>> the TR5 PI engine was continued in the tr6 for everywhere except north
>> america, where we got the carb'd version as in the TR250. the cam and
>> horsepower are also different, the PI doing substantially better,
>> supposedly around 150 hp whereas the carb'd vers was more like 105.
>>
>> the pollution equipment, the head, the exhaust and manifolds, and then
>> even the carbs changed over time for the worse as BL didn't know how to
>> work within the ever more stringent pollution standards except by
>> strangling the car more and more. this was also true for the spitfire,
>> mgb, midget, etc.
>>
>> also there are the issues of ride height and the rubber bumpers, a
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