you are correct.... i have done the su swap and found the stock set up to be
the same.... even webers don't do much unless the motor is built for the
carbs.... change the oil pan and put in the tr6 motor....changes the whole
issue
----- Original Message -----
From: "scotts junk" <smacsjunk@hotmail.com>
To: <triumphs@autox.team.net>
Sent: Tuesday, August 12, 2008 4:05 PM
Subject: Re: [TR] GT6 carbs?
> All GT6 models came equipped with Zenith-Stromberg CD150 carbs (1.5").
> Thre's
> been lengthly, but as far as I can tell inconclusive debate regarding
> whether
> or not there is any benefit switching to SU HS4s (equivalent size to
> CD150).
> As I read it, maintenance/tuning "MAY" be slightly easier, performance
> change
> will be nil. I assume the reason that he is going to a TR6 manifold is to
> be
> abe to fit 1 3/4 carbs (CD175 or HS6). If so, he should be aware that
> there
> are several flavours of TR6 manifold and I don't think any of them will
> fit
> under a GT6 bonnet without the carbs interfereing, especially HS6s. It
> will be
> necessary to add a blister (a la TR4/250) or hood scoop to provide
> clearance.
> The long runner manifolds may also interfere with the wheel arches. It is
> possible to get adapters or, with a little dilligent fill welding,
> grinding,
> drilling and tapping, modify the GT6 manifold to match HS6s and still
> (barely)
> fit under the hood. Going to 1 3/4 carbs is a non-trivial modification and
> only worth the effort if all the co-dependant mods are also made: porting,
> chamber cleanup, valve work, tubular exhaust, uprated cam, balancing, etc.
> If
> the complete set of upgrades are not done, the performance increase will
> be
> negligable. cheersScott> Date: Mon, 11 Aug 2008 20:37:14 -0400> Subject:
> [TR]
> GT6 carbs?> > A neighbour has a 70 GT6 Mk II engine in a Spit, and does
> not
> know what the> correct carbs should be. He has Strombergs on there now and
> would prefer> SUs. He says the head will receive the same manifold as a
> TR6,
> if that helps.>... Thanks,> Jim>
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