52 replies to this topic

[Petro1head]

Hi

I have a pair of SU HS4 carbs on a SPC manifold fitted to my 1330 engine in a 1967 mini.

The problem I have is the fuel bowels are fouling on the bulkhead.

I have a couple of ideas to overcome this:

1) replace to and bottom engine steadies with adjustable ones. Cost will be fairly high thought at about £60 inc del

2) figure out how to move the carbs closer to the engine. The is a fairly thick insulating spacer between the carbs and manifold so could get thinner ones, but where from? And/or machine the carb face of the manifold,

Any thoughts or suggestion please

[ANON]

what thickness are the spacers?

[Dan]

Spacers are available in a range of thicknesses direct from SU (search for Burlen Fuel Systems). Cheap and the appropriate fix.

[MRA]

Or its the wrong manifold, my money is on it being a Midget manifold !

[KernowCooper]

Just about to say Manifold off a inline application like a sprite/midget, any numbers on the manifold or is it aftermarket?

Edited by KernowCooper, 17 March 2013 - 09:22 PM.

[Dan]

Good point, where are they from? Are the float bowls level? If the float bowl spacers are rubber what colour is on what carb?

[MRA]

Thats the little bit between the carb and the float bowl

[Petro1head]

Hi

Spacer is 12mm thick. Manifold is aftermarket SPC as stated

Having now removed the carbs, itis the casting flashing on the right hand (looking at the engine) float bowle that's hitting ones the bolts that hold the plate that the heater pipies go tho.

Soi am going to, to start with, remove the flashing and machine the head of the bolt down

[Petro1head]

Good point, where are they from? Are the float bowls level? If the float bowl spacers are rubber what colour is on what carb?

spacers are rubber and black

[KernowCooper]

Dont forget any work you do static to get clearance may foul again under engine movement under power on/off
Can you pull the choke and get the choke tubes to drop fully. this is another area where clearance can be a issue, and striking and bending the tubes.

[Dan]

The float bowl is hitting? Are they level or not? I think black rubber float adaptors have always been for 10 or 20 degree applications (are they really black on both sides, isn't one grey?). Minis need 30 degree angle carbs.

Edited by Dan, 17 March 2013 - 09:50 PM.

[Dan]

Sorry , black and red would be a pair of adaptors, not black and grey.

[Kam]

While you're there check out your engine mounts just incase they are too compressed

[Petro1head]

Choke does not fowl

Yeh, float it catching. Yeh rubber is black, will check the other one now

Edited by Petro1head, 17 March 2013 - 10:01 PM.

[ANON]

Sorry , black and red would be a pair of adaptors, not black and grey.

you were right first time. black and grey are a pair.

or is it black and red? mind you think you can have both?? will have to check, that's got me thinking now!!!

Edited by ANON, 17 March 2013 - 10:05 PM.