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Hello,
The N series needles are for the 1600. They are for the .09 jets. The M
series needles are for the .10 jets on the 2000. Once I find the best needles
for the 1600 I'll use the "convert" program in "haystack" to locate a similar
needle for the 2000. I wish someone near Las Vegas with a 2000 SU roadster
would let me experiment on it. Or if you want to parallel my efforts with
your 2000 I'll write up my methodology. Doesn't seem necessary for a bunch of
us to buy a lot of wrong needles. A couple of us should be able to sort it
out.
keith
In a message dated 8/4/00 9:04:18 AM Pacific Daylight Time, sochoux@yahoo.com
writes:
<< Hi Keith,
I'm interested to know you what needles you found to
work best. I'm in the same situation right now, did
the colortune thing and now have an O2 sensor rigged
up. I currently have N17 needles ('69 2000) and they
are way to lean in the midrange, they don't even
register on my meter! I've been trying to locate
charts of various needles but have not been successful
in locating more than a few. I'm looking at the M39,
M45, M66 but i don't know if these are just for the
1600.
Thx,
Stephan
>>
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Date: Fri, 4 Aug 2000 09:04:08 -0700 (PDT)
From: Stephan Sochoux <sochoux@yahoo.com>
Subject: Re: British SU needles in Hitachi/SU carbs
To: Keith0alan@aol.com
MIME-Version: 1.0
X-Mailer: Unknown
Hi Keith,
I'm interested to know you what needles you found to
work best. I'm in the same situation right now, did
the colortune thing and now have an O2 sensor rigged
up. I currently have N17 needles ('69 2000) and they
are way to lean in the midrange, they don't even
register on my meter! I've been trying to locate
charts of various needles but have not been successful
in locating more than a few. I'm looking at the M39,
M45, M66 but i don't know if these are just for the
1600.
Thx,
Stephan
--- Keith0alan@aol.com wrote:
> Hello Chris,
>
> Getting the Nissan needles is not a big problem
> in the U.S., the problem
> is that I don't like the profile of any of them.
> They are all rich at idle
> then lean out too much in the mid range. I first
> noticed this with the
> colortune and confirmed it with the oxygen sensor
> box. Some are better but
> none are really right. I am trying to find one that
> maintains the correct
> mixture across the entire speed range. If you
> compare the Nissan to the SU
> profiles you can see that they had entirely
> different design ideas. I like
> the SU design better, I just need to sort out which
> one is correct for the
> 1600 roadster.
>
> keith
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