Waxstat jets adjust the mixture of the gas automatically as the engine heats
up. The problem arises when the jet is older and worn. You can then start
getting a lean mixture at operating temp and can be even worse on hot days.
I'm not an expert but I figure you should do at least the following to
HS4's:
Bush the throttle shaft
Replace the butterfly to get rid of the idle bypass valve (can suck to tune
if spring is weak)
Change jets to standard from waxstat.
Anyhow, this is only my opinion and I'm sure there are countless people out
there who are happy with the waxstat jets.
-----Original Message-----
From: owner-spitfires@autox.team.net
[mailto:owner-spitfires@autox.team.net]On Behalf Of Trevor Boicey
Sent: Monday, February 05, 2001 5:43 PM
To: Huw Upshall
Cc: Chris DeStaffany; spitfires@autox.team.net
Subject: Re: su waxjets
Huw Upshall wrote:
>
> Duh, What about the rest:
>
> You want to get rid of the waxstat jets and replace with regular jets.
They
> were an attempt at early emmission control and they sucked.
Can you put into words how they sucked?
I have ex-euro HS4s on my 1500, and since they were clean
and tight, I just put them on and it seems fine, waxstats and
all.
...or at least they seem fine, maybe I am just not being
terribly observant.
--
Trevor Boicey, P. Eng.
Ottawa, Canada, tboicey@brit.ca
ICQ #17432933 http://www.brit.ca/~tboicey/
"You might want to crane your necks upwards now to save time." - Homer
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