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Re: SU varbs

To: "Thomas L. Burgin" <tburgin1@cox.net>, <mgs@autox.team.net>
Subject: Re: SU varbs
From: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
Date: Mon, 9 Oct 2006 15:16:52 +0100
Personally I can't think of anything where the HIFs are easier to work on 
than HSs, quite the reverse.  On HIFs the carbs have to be removed to get at 
the float chamber and valve, and a new O-ring fitted each time or the cover 
will leak.  On HSs the cover can simply be removed in-situ, and even though 
it has a gasket this is above the normal fuel level and so is not critical. 
On the HIF the choke or enrichment device is a separate valve, which can 
have its own problems like leaking O-ring seals, unlike simply moving the 
external main jet as on the HS.  Having a pair of each I'd say that the HIFs 
are slightly more difficult to get the correct mixture using the lifting 
pin.  The benefit of HIFs is that they are marginally kinder to the planet, 
and the temperature controlled main jet means that correct mixture is 
maintained across a wide temperature range, rather than tending to get a bit 
rich in hot conditions or a bit weak in cold.  Between the two, I always 
recommend HSs.

PaulH.

----- Original Message ----- 
> ...   HF4's might have even been better because they can be worked on 
> easier.




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