ausmini
https://www.ausmini.com/forums/

twin webbers on a mini????
https://www.ausmini.com/forums/viewtopic.php?f=5&t=1956		 Page 1 of 1
Author:  lobby69 [ Sun Sep 19, 2004 10:04 pm ]
Post subject:  twin webbers on a mini????
hey,

was out at oran park marshalling on saturday,

fella by the name of HEYDON had twin webbers/dellortos fitted to his S mini, how hard is it to fit, besides hacking into the firewall???

would it really be worth it on an almost statndard 1100 K?

would these be able to fit a mini if it was on a custon manifold???
http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 65132&rd=1
cheers

blake
Author:  thommo09 [ Sun Sep 19, 2004 11:04 pm ]
Post subject: 
unless he was running an 8 port head the chances are they were split webers, not twin. the difference being that split webers use just one choke of each carb and hence the carb and port can be lined up better. Twin webers were used on 8-port crossflow heads because there were 4 induction ports. I've never actually seen a split setup in the flesh but from what ive read/heard unless the donk is HARD tuned then a single 45 will o the job

i'm sure the doc will have some advice though :wink:
Author:  Morris 1100 [ Sun Sep 19, 2004 11:29 pm ]
Post subject: 
There were two reasons for the split webber setup, the first reason was to get a straight flow into the head without any bends that divert fuel into number 1 and 4 and miss number 2 and 3.

The second reason was slightly different.... Back in time some classes of racing had a rule that you could run any carb but you had to keep the original inlet manifold so you could adapt two webbers to fit where the twin SUs once lived.

I would not recomend fitting a split setup for road use as it would just make things harder under the bonnet with little extra power.
Author:  min13k [ Mon Sep 20, 2004 12:09 am ]
Post subject: 
it is a sports sedan dayrl(?) heydon owns it nice car his 15 16 year old son races a one to seen them at a few mcc supersprints dad drives in front at a reasonable pace to teach the young bloke the lines
makka
Author:  1310/71 [ Mon Sep 20, 2004 7:45 am ]
Post subject: 
Split weber system was on ebay within the last twelve months for around $900 (didn't sell from memory).
I agree with the comment not for road use. Seems a waste of two perfectly good webers to me.

KB
Author:  aaron [ Mon Sep 20, 2004 8:18 am ]
Post subject: 
A webber is not really worth putting on a stock 1100, and if you did you would probably only need a 38 or a 40. Even then they stick those on much bigger cars. Webbers and the like will give you better throttle response down low if there set up right, but then again the difference between a well setup SU and a webber is minimal down low. it is only when your up high in the rev range that there may be a difference. My suggestion would be not to waste your money. Save up and build a motor that would be worth putting a webber on.
Author:  Lillee [ Mon Sep 20, 2004 8:48 am ]
Post subject: 
There are two types, twin webbers and split webbers, the ebay one above is twin webber setup and you'll need an 8 port head to bolt that on (from memory an 8 port head alone was worth $5000?)... or a 7 port head (4 intake, 3 exhaust?) not to mention bulk head hacking...

The other type is when you cut 2 webbers in half and weld em back together so that the 2 half webber trottles line up perfectly with the standard mini induction ports without having to use curved manifolds etc. therefor eliminating intake manifold restrictions. These where used in works mini's back in the day I think... only read about them so I am just regurgitating info :wink:

The vizard book has an example of a split webber I am pretty sure...Seems like a total waste of 2 webbers as the gain is probably VERY little. I guess the Works guys could afford to hack up 2 webbers :?
Author:  drmini in aust [ Mon Sep 20, 2004 1:56 pm ]
Post subject: 
68Delux wrote:
There are two types, twin webbers and split webbers, the ebay one above is twin webber setup and you'll need an 8 port head to bolt that on (from memory an 8 port head alone was worth $5000?)... or a 7 port head (4 intake, 3 exhaust?) not to mention bulk head hacking...

The other type is when you cut 2 webbers in half and weld em back together so that the 2 half webber trottles line up perfectly with the standard mini induction ports without having to use curved manifolds etc. therefor eliminating intake manifold restrictions. These where used in works mini's back in the day I think... only read about them so I am just regurgitating info :wink:

The vizard book has an example of a split webber I am pretty sure...Seems like a total waste of 2 webbers as the gain is probably VERY little. I guess the Works guys could afford to hack up 2 webbers :?


Actually no welding involved.
One carb is cut away to `miss' the other. In Vizard's HTMYM it shows how to do it without major hacking.
The 2 unused barrels have their jet holes all plugged up.

Most of the fast race Minis running 5 port heads don't bother with splits any more. I think the days are gone when they gave more power... :wink:

<edit> There was a Manx Racing conversion in UK years ago, where the 12G940 head was modded to take 2x 40DCOE Webers. He split the 2 ports into 4 somehow.... I doubt you would find one now though.
Waggott Engineering used to do it here too, on Holden `red motor' heads.
Author:  9YaTaH [ Mon Sep 20, 2004 3:00 pm ]
Post subject:  Waggott!!
drmini in aust wrote:
68Delux wrote:
<edit> There was a Manx Racing conversion in UK years ago, where the 12G940 head was modded to take 2x 40DCOE Webers. He split the 2 ports into 4 somehow.... I doubt you would find one now though.
Waggott Engineering used to do it here too, on Holden `red motor' heads.


Doc, believe they still have that old holden in-jine sitting in their showroom in Alstonville!! :shock:
Author:  drmini in aust [ Mon Sep 20, 2004 5:28 pm ]
Post subject: 
Mick,
A friend of mine years back had a Prince Skyline GT with a 186 Holden block, a 12 ported (Waggott) red motor head and triple Webers. Power was around 240BHP and it drove thru the 5 speed Skyline GT box.
It weighed only 19.5cwt (under 1,000kgs) and man, it flew! I had a drive.. :P

Waggott used to braze weld a strip of steel sheet down the middle of the 3 siamese inlet ports, to make 6 separate ones.... :wink:
Author:  lobby69 [ Wed Sep 22, 2004 7:03 pm ]
Post subject:  cheers
thanx for all the comments!!!,

it was a white mini, with heydon on it, and the sons was a gold one with heydon....(coincidence???!) heheh,

i wouild love to go big set up but $$$$ is short!!!

cheers all!

blake
Author:  supercharged 850 [ Fri Sep 24, 2004 2:34 am ]
Post subject: 
do what i do - spend it before you get it :wink:

i only bought my split webers cos i dont want to box the firewall to suit a long single weber manifold
Author:  HistoricRacingS [ Sun Sep 26, 2004 7:38 pm ]
Post subject: 
I recommend spend your money on a decent Camshaft and cylinder head before getting to anything as exotic as twin webers!

HRS
Author:  meeni [ Sun Oct 03, 2004 5:07 pm ]
Post subject: 
hi

try finding the "tuning bl's a-series engine" manual by david vizard. it will tell you everything you need to know about getting the most out of your 1100 aswell as telling you about twin and split webbers. as some people have said the s was either running an 8-port head or he had split webbers. make sure you think about the mod before fitting them though. my 1100 runs perfectly with the twin s.u setup.

cheers

sean
Page 1 of 1 All times are UTC + 10 hours
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/