Pete and list:
FYI, AFAIK the matched set theory is only applicable to SU carbs, as they
use no diapraghm for sealing top to bottom. Thus, a machine tolerance
finish is required!!
I have swapped internals on my GT6 150 CDs (put the guts of a set of 67
carbs into the body of a 72 spec to get the non-adjustable needles for
racing) with no problem.
HOWEVER, I found that the top of the carb and the piston should be
matched. A swap here may allow the piston to hang up or run stiff oncethe
carb is re-assembled. To cure this, I emery cloth refaced the carb body
lightly, and polished the piston on a buffing wheel. The tolerances became
sympathetic, all is well, and the diapraghm keeps vacuum where it should be.
NEVER try this with an SU.
Dave T
-----Original Message-----
From: Pete & Aprille Chadwell <dynamic@transport.com>
To: triumphs@autox.team.net <triumphs@autox.team.net>
Date: Thursday, May 20, 1999 7:51 AM
Subject: Re: 1972 TR6 Stromberg piston needed?
>
>You wrote:
>>I am looking for a new piston for my Stomberg carb anyone have one they
>>are willing to part with??
>
>Chester:
>Dunno what to tell you here. My understanding is that piston and carb
>bodies are matched to each other in some way. So, it is not advisable to
>swap pistons between carbs. I don't really know how crucial this is, as
>I've never swapped 'em and then noted the results. In theory, it won't
>work very well. But, maybe that's exaggerated.
>
>In any case, depending on what's wrong, it might be that you'll be looking
>for a whole new (used) carb. And then I'm wondering if anyone will want to
>sell just one. I've got a spare set of Strombergs... not sure if I'd want
>to part with 'em or not, but I think I would definitely want to sell BOTH
>of them if at all.
>
>I'm sure we'll get this straightened out with some other input from more
>knowledgeable folks!
>
>Pete Chadwell
>1973 TR6
>
>
>
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