[6pack] Triple SU Size

[Todd Bermudez]

Hi Greg,

Goodparts does offer a triple GT6 manifold which will
work with the 1.5" carbs...it's just swept downward to
clear the GT6 bonnet, but should work just fine on the
TR6/TR250.  Not sure about port spacing though.  Why
don't you ask Richard & see if he'll make somethin' up
for you.

Cheers,

Todd Bermudez
'68 TR250
'70 TR6
'68 Triumph 2000
'68 GT6 RHD


--- Greg Dito <dito9561 at bellsouth.net> wrote:

> AHHH!  The $60,000 question!  That I will need to
> investigate unless someone 
> knows already.  I was considering using the 1-1/2"
> thick carb to manifold 
> insulators and putting a chamfer on the ID to lead
> into the manifold.  From 
> photos the carbs appear the same except for the
> throat diameter.
> 
> Thanks, Dick.
> 
> Greg
> CD6250L
> 
> ----- Original Message ----- 
> From: "Sally or Dick Taylor" <tr6taylor at webtv.net>
> To: "Greg Dito" <dito9561 at bellsouth.net>;
> <6pack at autox.team.net>
> Sent: Tuesday, December 16, 2008 8:32 PM
> Subject: Re: [6pack] Triple SU Size
> 
> 
> > Greg---I think your premise is correct on all
> accounts. Would the carb 
> > flanges bolt up to the manifold?
> >
> > Dick
> >
> >
> > -----Original Message-----
> > From: Greg Dito
> > Sent: Tuesday, December 16, 2008 5:08 PM
> > To: 6pack at autox.team.net
> > Subject: [6pack] Triple SU Size
> >
> > Listers,
> >
> > Does anyone have some knowledge as to whether it
> makes sense to use 1-1/2"
> > SUs (HIF38 or HIF4) on a Goodparts triple manifold
> versus 1-3/4"?  The
> > 1-1/2" x 3 has more than enough CFM capacity for
> the engine but because 
> > the
> > throat is smaller I would expect there to be
> greater negative pressure
> > across the carb jet resulting in a more thorough
> mix of air and fuel at
> > greater velocity going into the combustion
> chamber.  Is my premise correct
> > or not?
> >
> > Thanks in advance.
> >
> > Greg Dito
> > CD6250L
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