X2 carby numbers and correct jetting

[reddo]

Hi All

Have just finished fitting a stock 186 in my EK ute. I scored a pair of X2 headers and fitted them along with an original X2 manifold that is fitted with what i believe is 2 original strommies.
Can someone supply details of the correct carb numbers they ran originally on the 179s and also the best jetting to suit the 186
The carbs are BXUV-2 i think the numbers are 2376050 they have 30mm throats???.
have fitted them up and they run rich no matter where i set the mixture screws???have checked float levels etc. havent touched jetting as the bloke i bought them from said they ran ok on his car... Not that we believe everything we are told .
Also chasing a new "W" clip that links the 2 carbs together. Some Gorilla overtightend the tiny bolts and broke the spring steel clamp on one side of the "W" clip.
Would really like to set these carbs up with the same set up the old 138 had on its twins. that is a remote rod mounted outside of the carbs and two tiny rose joints like tie rod ends on seperate rods for individual idle adjustment of the carbys. This way there is no chance of carbs getting out of tune due to shaft slip between the two.

Until i sort this out i am happily running on a single carb and manifold.
Enough dribble .. its over to you lot
Reddo

[Trev]

Hi Reddo, I've just taken my x2 set up off my red motor, only because the motor is the most stock motor you would ever come across and I thought it was a bit over carbed (2 x 149 size carbs), although it ran really well. So now I've put a single carb and standard manifolds on, the power increase is incredible , I may even be able to spin the wheels in the pooring rain , I just hope the fuel ecconomy is better now also,
Trev . ps; X2 set up for sale .

[smooth]

Trev,

Does it have the holden manifold and linkages?
If so PM me with the price etc.

Air cleaner/s?

Regards, Smooth

[FB MAD]

G'day Reddo,

Just had a look at my GREGORYS FX to HR shop manual.

According to it:-


X2 Engines used twin stromberg BXUV-2 carbies which are the same as originally fitted to 149 and 161 engines.
They had the same venturi diameter as 149/161 as well which is stamped on the side of the main carburettor body and will be 1 3/32.

Differences to standard 149/161 are only fairly slight.

These are:

Idle tube X2 is number 70 drill (149/161 is 68 drill )

Idle air bleed X2 is 52 drill (149/161 is number 53 drill )

So.... in a nutshell it looks like you might need a pair of original 149/161 1 3/32 carbies.

It might not be so simple as just wacking on a pair of 149 carbies but they might run better than what you have at the moment.

Have a look on the carbie bodies you have at the moment and let us know what they are.If they are the 179/186 originals they will be BXV-2 and 1 5/32 will be stamped on the carburetter main body.

Ive got a 138 red motor here with original carby as well as a 149 with original carby so will have a look at the sizes they run.
I've also got a small plastic tub here with some carby's so will have a look at whats there and if there's any 1 3/32 carby's you can grab 'em when you come up to my house to play this Saturday.

Hope this helps, and is correct, but I'm sure someone will correct any errors I've made .

Terry.

[Trev]

Trev,

Does it have the holden manifold and linkages?
If so PM me with the price etc.

Air cleaner/s?

Regards, Smooth

The manifold has Holden on it with the number 7428490 on the middle intake pipe.
I don't know how to tell if they are holden linkages.
Sorry no air cleaner, just a couple of after market chrome 4" jobbies.
How about I bring them to the nationals with me so you can check them out?
Trev

[FB MAD]

Just back from the shed.

138 red motor runs BXUV-2 1 3/32 as does the 149 red.

Grey motors run BXOV-2 1 1/32.

I've seen twin grey motor carbs on a red motor ( I think it was a 161 ??) a few years ago but the carb base to manifold holes have to be slotted to fit as the red motor carb base is wider than the grey motor carb base.

Trev, Part number 7428490 is a HD X2 inlet manifold according to my Master Parts Cattledog.

Terry

[smooth]

Trev,

Does it have the holden manifold and linkages?
If so PM me with the price etc.

Air cleaner/s?

Regards, Smooth

The manifold has Holden on it with the number 7428490 on the middle intake pipe.
I don't know how to tell if they are holden linkages.
Sorry no air cleaner, just a couple of after market chrome 4" jobbies.
How about I bring them to the nationals with me so you can check them out?
Trev

Yeah mate, that would be sweet.

Regards, Smooth

[reddo]

Hi All
Thanks for the great response overnight. my computer at home is on the fritz so i disdnt pick these replys up until i got to work.
My carbs have BXUV-2 on them as well as 2376050

I have about six other carbs and they all have either 2376060 or 2376061. i am pretty sure these are all 179 and 186 carbs with 35mm bores on them
the 2376050 has a 30mm bore so i am almost certain they are 149 or 138 red carbs.
I havent had a chance to check out the 3/32 v 5/32 numbers yet but again i think they are 3/32.
When i had the car running with the twins on it ran rich no matter where i set the mixtuire screws. Perhaps i have a blockage up one of the airways or something??. Will probably have to do a full "Autopsy" on them to find out whats going on. while they are apart i will check jet sizes against what
Terry has quoted from his "gregorys manual"

Meanwhile i spent last night setting up the single carb witha VC commie throttle cable. works great and pedal pressure is smooth as silk.
Sorta makes ya wander why i wanna keep stuffin about with the "terrible Twins" ... fuel is expected to hit a buck fifty in Sydney very shortly so us country bunnys will be payin a buck sixty....
Someone needs a bowser hose jammed up their ar#e

Once again thanks for the replys
Reddo- onecarb