Eriks,
This is the data I found on the needle profiles. I can't explain the
differences, I am just copying information from my SU book.
Needle AAC Needle M
1 .089 .089
2 .0855 .0855
3 .0835 .0832
4 .0811 .0808
5 .0788 .0785
6 .0765 .0763
7 .0742 .0745
8 .072 .0726
9 .0698 .0707
10 .0676 .0688
11 .0655 .0669
12 .0631 .065
13 .061
14 .059
15 .057
16 .055
Have fun.
Bill
-----Original Message-----
From: Eriks Skinkis <eriks@netspace.net.au>
To: William M. Schickling <bugeye@dreamscape.com>
Date: Wednesday, December 09, 1998 11:18 PM
Subject: Re: SU Needle difference
>Hi Bill,
>
>Only one pair of the carb's still have their tags and are stamped AUD136F
and
>AUD136R, these are form a 67 Midget and have the "M" needles.
>
>The other pair of carb's no longer have their tag but are from a ex-US 70
>Midget which originally had pollution gear and air pump on the engine,
these
>are the spring loaded needles "AAC".
>
>I would assume both needles are original for each car.
>
>I am rebuilding the later pair of carb's with new floats, gaskets, etc...
and
>would just like to find out what the difference between the needles might
be
>(if any), other than the latter ones being self centering.
>
>Thanks,
>Eriks.
>
>William M. Schickling wrote:
>
>> Eriks,
>>
>> I have a great SU book that lists the correct needles for every type of
SU.
>> Do you know yhe number on the little plate attached to the float chamber.
>> AUD XXX for example.
>>
>> I can look up the needles for you.
>>
>> Bill
>>
>> -----Original Message-----
>> From: Eriks Skinkis <eriks@netspace.net.au>
>> To: spridgets@autox.team.net <spridgets@autox.team.net>
>> Date: Wednesday, December 09, 1998 6:31 PM
>> Subject: SU Needle difference
>>
>> >I have two sets of 1.25" SU carb's. Looking at the needles one pair has
>> >the later type spring loaded needles stamped "AAC" while the other pair
>> >has the earlier type fixed needles stamped "M".
>> >
>> >Is there much difference between the "AAC" and the "M" needles, would
>> >one be better than the other?
>> >
>> >Thanks,
>> >Eriks.
>> >
>> >Midget '70
>> >
>
>
>
>
>
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