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swan neck
https://www.ausmini.com/forums/viewtopic.php?f=2&t=62571		 Page 1 of 1
Author:  mini is my ride [ Mon Apr 19, 2010 10:46 pm ]
Post subject:  swan neck
Hi

getting two different views here

swan neck manifold good or bad?

and are su's better/easier than dellorto/webber?

cheers
Author:  drmini in aust [ Mon Apr 19, 2010 10:54 pm ]
Post subject: 
Depends on what you call a `swan neck' and what motor it's going onto.
If you mean the real `lynx' Weber swan neck, it's not that bad on a smallbore but is useless on a 1275 or bigger.
If you mean the Redline 3005 (and the previous Warneford, same manifold) I'd call them short, but not swan neck. They are pretty good on a road car, can handle up to 125HP with a 45DCOE or 45DHLA when ported properly. I run one on the 1360... :P
They will fit in (including a Ramflo filter) with no firewall cutting.

As for SU vs Weber it depends what you want. You can get good power with either, but the music only comes with a Weber (or Dellorto).:mrgreen:
Author:  subwayseth [ Mon Apr 19, 2010 10:58 pm ]
Post subject: 
http://www.spridgetmania.com/web/SCatag ... ticleV.cfm

this may help....if you follow along it shows the different manifold readings on a flow bench, a pretty interesting read too
Author:  Fat Boy Dave [ Tue Apr 20, 2010 10:13 am ]
Post subject: 
I'm no expert but I've got a redline 3005 manifold with a weber on a 1275 and it's a cracker. Induction roar is definitely a feature.
Author:  Flute [ Tue Apr 20, 2010 10:27 am ]
Post subject: 
"Induction roar is definitely a feature."

Yeah, that's why I haven't bothered putting a stereo in my car! It's even worse / better now while I have the sound deadening out to start the resto. It is definitely something to consider though, my missus won't get in the car now and on long drives my mates reckon they will go deaf!

I was running the original twin SU's and was continuously having to adjust or fix them. Since putting in the 45 Weber I haven't had to touch it. I'll keep the SU's in the shed just in case originality beocmes a priority later. At least with the redline manifold I havent had to cut the firewall.

Thanks again to the Doc for his advice along the way, it all worked well.
Author:  Lockie91 [ Tue Apr 20, 2010 1:40 pm ]
Post subject:  Re: swan neck
mini is my ride wrote:
Hi

getting two different views here

swan neck manifold good or bad?

and are su's better/easier than dellorto/webber?

cheers


ok, my view, if you want power and go, go the webber or dellorto, but if u want just a nice neat package go the su's, but bear in mind unless its a very good motor with good high specs, you wont get as much power with a su, as u would with a webber or dellorto. also u wont get that nice sucking sound like a webber does, and you will be continuelly tuning the su, and its mixture.. Depends wat u want mate....

A lynx swan neck manifold is the way to go on ur small bore if you dont to cut into the firewall...

It comes down to what you really want outta your motor...
Author:  VulcanBB18 [ Tue Apr 20, 2010 5:36 pm ]
Post subject: 
start nitpick

Quote:
you will be continuelly tuning the su, and its mixture..


I don't think that is at all true. Once an SU is set you barely ever have to touch it apart from checking the dashpot oil.

A lot of people pour crap on SUs but in reality they are an excellent carb, only bettered by the weber/dellorto if you are chasing all-out power. They will even give you induction roar if that's what floats-yer-boat, but not in the same class of roar as a weber ;)

cheers

Jacob

end nitpick
Author:  slide [ Tue Apr 20, 2010 5:39 pm ]
Post subject: 
My Cooper S with 45 Weber on Warneford manifold with Brownriggs and Cooper S Lukey single box....sound to die for.

By comparison my van with HIF44 on an Oselli with Maniflow2 and two box RC40 sounds comparatively lame (although much better than any ricer).
Author:  Lockie91 [ Tue Apr 20, 2010 5:50 pm ]
Post subject: 
VulcanBB18 wrote:
start nitpick

Quote:
you will be continuelly tuning the su, and its mixture..


I don't think that is at all true. Once an SU is set you barely ever have to touch it apart from checking the dashpot oil.

A lot of people pour crap on SUs but in reality they are an excellent carb, only bettered by the weber/dellorto if you are chasing all-out power. They will even give you induction roar if that's what floats-yer-boat, but not in the same class of roar as a weber ;)

cheers

Jacob

end nitpick


Well i find that here in QLD where the temperatures change all the time of the year, the car always will like to be adjusted now and again with SU's, also due to the wear of the engine, they like to be tweeked, especially if they are being used for daily drivers like me, and long distance driving.
Author:  MG Rocket [ Tue Apr 20, 2010 5:54 pm ]
Post subject: 
SUs I believe do not deserve this unreliable and in need of constant tuning reputation.
The thing with SUs is that they are mostly very old and the problem is that they continue to perform quite well when worn out.
In good condition once tuned there nothing to adjust.
Author:  blue_deluxe [ Tue Apr 20, 2010 5:55 pm ]
Post subject: 
Lockie91 wrote:
VulcanBB18 wrote:
start nitpick

Quote:
you will be continuelly tuning the su, and its mixture..


I don't think that is at all true. Once an SU is set you barely ever have to touch it apart from checking the dashpot oil.

A lot of people pour crap on SUs but in reality they are an excellent carb, only bettered by the weber/dellorto if you are chasing all-out power. They will even give you induction roar if that's what floats-yer-boat, but not in the same class of roar as a weber ;)

cheers

Jacob

end nitpick


Well i find that here in QLD where the temperatures change all the time of the year, the car always will like to be adjusted now and again with SU's, also due to the wear of the engine, they like to be tweeked, especially if they are being used for daily drivers like me, and long distance driving.


By that logic any mechanical fuel delivering system must be adjusted to suit the conditions. This includes all carburettors, weber, su, stromberg. The only way around this is fuel injection.

The biggest problem is people not getting them set up on a rolling road and having the whole package working together. How many cars do you see with bigger carbs, a lumpy cam, a bit of head work then a stock dizzy?
Author:  MG Rocket [ Tue Apr 20, 2010 5:56 pm ]
Post subject: 
Lockie91 wrote:
Well i find that here in QLD where the temperatures change all the time of the year, the car always will like to be adjusted now and again with SU's, also due to the wear of the engine, they like to be tweeked, especially if they are being used for daily drivers like me, and long distance driving.

This would be a problem with any carb motor, it is just you can adjust a SU easily.
Author:  VulcanBB18 [ Tue Apr 20, 2010 5:57 pm ]
Post subject: 
Doh! MG beat me to it.

I'm a Qld-er too and used minis for daily and/or long driving, summer or winter.

As MG said once the worn bits are replaced and it's tuned correctly, they are simply great! No pump-jets, venturi tubes, idle circuits, etc just simplicity!

If folks are looking down the weber/dellorto route to cure tuning hassles, they've made a wrong turn somewhere!

cheers

Jacob
Author:  drmini in aust [ Tue Apr 20, 2010 7:34 pm ]
Post subject: 
I've had a 45 Dellorto and Redline 3005 on my 1360 for 15 years.
I put a kit in it 10 years ago.
Apart from fitting smaller main jets since last dyno day I've not touched it for years.
This includes the idle stop screw, and the idle mixture screws. It idles and runs fine, summer or winter.
It ain't broke, so I ain't fixing it.

But...
The 1412 stroker is going in it in a couple of weeks, and it's getting a single HS6 on a RE7" manifold.
Why? Because it made the same HP on the dyno as the 45 Dellorto did, but with lots more midrange torque.
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