For the 1500 spit engine, the HS4s are the ones to
use. The HS2s are good for low end but HS4s are for
the upper end. the stock UK setup is the HS4s for the
1500 HS2s for the 1275.
Trevor...if in doubt...Ask Lawrie Alexander.
I do have a source for the HS4 manifolds from the UK
so if anyone is looking for one...let me know and I'll
send along the name and address of my source.
--- Trevor Boicey <email@example.com> wrote:
> Christian Stanton wrote:
> > What years Spitfire (uh-oh, wrong crowd) still
> used the 1500 with dual SU's?
> In a word, more or less none.
> The problem you are likely to see is that any
> Triumph dual SU
> manifolds you will find around are for dual HS2s,
> not dual HS4s
> like the Midget should be.
> I have seen a lot of Midget 1500 owners who have
> their "dual
> SU conversion" but more often than not they are the
> I think dual HS2s flow more air than a stock ZS,
> but they
> aren't all that they could be.
> As for getting one, just get them from the UK. Any
> there has a few sets, and generally not expensively.
> Trevor Boicey, P. Eng.
> Ottawa, Canada, firstname.lastname@example.org
> ICQ #17432933 http://www.brit.ca/~tboicey/