SU article
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OVERDRIVE
Joined: Jul 2006
Posts: 7,037
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From: Melbourne, FL
SU article
early holiday gift from Classic Motprsports
a bit of SU info (basics really)
online artice only @ http://classicmotorsports.net/articles/simple-carbs/
a bit of SU info (basics really)
online artice only @ http://classicmotorsports.net/articles/simple-carbs/
Last edited by Capt_bj; Nov 20, 2008 at 01:09 PM.
Neutral
Joined: Sep 2008
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Glad you liked it Capt!
We have a Mini profile up, too:
http://classicmotorsports.net/articl...small-package/
And of course there's David's Innocenti Mini project car, and various other Mini stuff. We love Minis.
We have a Mini profile up, too:
http://classicmotorsports.net/articl...small-package/
And of course there's David's Innocenti Mini project car, and various other Mini stuff. We love Minis.
6th Gear
Joined: Dec 2002
Posts: 1,539
Likes: 0
from declann over at Minimania:
Perhaps some of you have noticed a gent named AC Dodd who has started posting to this board fairly recently. He is a genuine A-series expert comparable to Keith Calver who participates in several forums and seems to have endless time and energy when it comes to helping out the Mini community. One of his most useful offerings is what he refers to as: "AC's SU Custom needle profile service". This is a free service and AC operates it from a forum, the excellent ML Motorsports Forum at this location: http://specialistminiforums.yuku.com/topic/4131?page=1
In order to post to this forum, you will probably need to register with YUKU by merely supplying a user ID, password and email address. No big deal.
This service is so popular that it has consumed an amazing 20 pages of forum posts. You may even be able to find an engine similar in build spec to yours in the thread so that you can use the needle/spring/damper combination recommended by AC. If not, just enter your specs and wait for AC's reply.
Once you get there, you will see this description of AC's service described thusly:
Due to the obvious need for a proper needle advice service, I will dedicate this thread to recommending needle profiles to people. Post up your full spec including cam, compression ratio, capacity and I will write down a profile that would be pretty close, giving no flat spots etc. Please also state which carb piston damper is fitted. It is of course impossible to get these things spot on by guessing or calculating, so the profile will HAVE to be checked. I will not of course except any responsibility of engine damage etc as you will still need to check and maybe tweek the profile on a rolling road.
I will write the profile up and it will be up to you the user to have your needle profiled to the spec. I will of course put down a needle that can be modified to suit the suggested profile. I will also state a suggested spring.
Please remember that no needle will be able to cure the ills of a worn carb. As a rule, if you are serious about economy and performance/general good manners, if the carb is more than 5 years old have it fully rebuilt or a fit a new unit. It is only when the carb in in A1 condition that you can then calibrate the unit to give the best mixture control.
So thats it really if you have needle issues post away and I'll do my best to help.......
In order to post to this forum, you will probably need to register with YUKU by merely supplying a user ID, password and email address. No big deal.
This service is so popular that it has consumed an amazing 20 pages of forum posts. You may even be able to find an engine similar in build spec to yours in the thread so that you can use the needle/spring/damper combination recommended by AC. If not, just enter your specs and wait for AC's reply.
Once you get there, you will see this description of AC's service described thusly:
Due to the obvious need for a proper needle advice service, I will dedicate this thread to recommending needle profiles to people. Post up your full spec including cam, compression ratio, capacity and I will write down a profile that would be pretty close, giving no flat spots etc. Please also state which carb piston damper is fitted. It is of course impossible to get these things spot on by guessing or calculating, so the profile will HAVE to be checked. I will not of course except any responsibility of engine damage etc as you will still need to check and maybe tweek the profile on a rolling road.
I will write the profile up and it will be up to you the user to have your needle profiled to the spec. I will of course put down a needle that can be modified to suit the suggested profile. I will also state a suggested spring.
Please remember that no needle will be able to cure the ills of a worn carb. As a rule, if you are serious about economy and performance/general good manners, if the carb is more than 5 years old have it fully rebuilt or a fit a new unit. It is only when the carb in in A1 condition that you can then calibrate the unit to give the best mixture control.
So thats it really if you have needle issues post away and I'll do my best to help.......
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