[Spridgets] hif-6 tuning

Guy Weller guy.weller at tiscali.co.uk
Wed Jan 16 02:46:13 MST 2008


Hi Andy,
I use that same set-up on my 1330 Sprite, using a
HIF44 and titan manifold

First, it sounds like your Titan is one for a
Mini, not a Spridget. The Spridget ones hold the
carb at a slightly lower angle  so there is no
clearance problem and there is still room for the
spacer (which also acts to reduce heat transfer to
the carb).
The Spridget ones are much rarer and quite hard to
find, but the mini ones can be made to work as you
have discovered!

As for flat spots - which needle are you using? I
have changed to using a BDL needle but I suspect
it is still a bit on the weak side. The real
answer is to get a rolling road session, which I
will do soon. - I just need to change to my 1.5
roller rockers first, then it is ready!

Guy

-----Original Message-----
From:
spridgets-bounces+guy.weller=tiscali.co.uk at autox.t
eam.net
[mailto:spridgets-bounces+guy.weller=tiscali.co.uk
@autox.team.net]On
Behalf Of Andy Webster
Sent: 16 January 2008 06:11
To: spridgets at autox.team.net
Subject: [Spridgets] hif-6 tuning


Greetings,
  I further bastardised my sprite on the weekend,
fitting a 1 3/4" HIF SU and a titan manifold.
  just fits under the bonnet, I mean just... I had
to omit the phenolic spacers to make it happen.
(it is a newish SU with the higher profile black
cap on the dashpot top..a slightly earlier HIF has
the flatter cap and would be less of a clearance
issue)

  It goes ok... but needs some tweaking.
  the low end response is better than with my
tired twins, but if I floor it there is a big old
flatspot, and the engine has to catch up before
the power kicks back in.
  Does this mean I am running too rich, or need a
different needle?
  Or have I just gone a bit over the top going
that big? (engine is a 1293cc, with a bit of a
cam, and headers)

  The carb doesn't have the piston lifting pin for
tuning, but i used a skinny screwdriver to lift
the piston a fraction and set the idle mixture to
somewhere in the range.

  any tips appreciated.
  Andy


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