3 replies to this topic

[JDImini]

Hi 

 

I've bought a HIF44 carb and looking to rebuild it. The suggested kit has the highlighted brass attachment to the butterfly

 

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but the existing carb doesn't have it.

 

Please can some explain what the attachment is

 

Thanks

Darren

[alex-95]

I think I bought the kit you're looking at and ended up buying a solid butterfly with out that bit. I was recommended CRK 162 on the SU website which has the solid butterfly you want.

From another thread:

It's part of the emission control, to reduce NOx. It bleeds some air in to the manifold on very high manifold vacuums, eg, coasting down a hill. There's a number (usually) stamped next to it, like 27.5. That's the in/mg vacuum at which it starts to open.

 

I solder them shut or fit a blank type butterfly.

[Turbo Phil]

As suggested above bin it. Solder the hole or get a solid butterfly. They are a huge restriction to airflow to.

Phil.

[JDImini]

As suggested above bin it. Solder the hole or get a solid butterfly. They are a huge restriction to airflow to.

Phil.

 

 

 

I think I bought the kit you're looking at and ended up buying a solid butterfly with out that bit. I was recommended CRK 162 on the SU website which has the solid butterfly you want.

From another thread:

It's part of the emission control, to reduce NOx. It bleeds some air in to the manifold on very high manifold vacuums, eg, coasting down a hill. There's a number (usually) stamped next to it, like 27.5. That's the in/mg vacuum at which it starts to open.

 

I solder them shut or fit a blank type butterfly.

 

 Thank you both! very helpful