The V8 Owners Forum -

These were in the intake between the carbs and the manifold. I believe the nylon block is to isolate the carbs from too much heat (may be wrong) but what do the metal tongues do? I'm guessing that they split the airflow, but other carb manifolds i have disassembled havent had anything in there. What i really want to know is are they needed and is there any benefit to keeping them in there?







Thanks

The nylon block is indeed there to minimise heat transfer between the inlet manifold and the carburettor/s.

I can see an SU HIF6 carburettor in your photos. What type of vehicle was the RV8 in that you removed them from?

In my P6B, there is a metal liner, similar to what you have, but without the tongue. I can only assume that it must be there to create a swirl effect, a vortex if you will, so as to accelerate the air/fuel mixture as it enters the inlet manifold.

It is only a guess, I could be well off the mark

Ron.

The carbs are from a P6, the inlet manifold that they came attached to had the same metal liner as you describe. The inserts in the photos are (I think) from a range rover...

Another guess - maybe it's there to help the air get around the first corner in the manifold.

Chris.

Not there to restrict air flow are they? I know the stage 1 land rover had restrictors in the carbs to bring the power down to under 100bhp..

I had restrictors in my inlet manifold, slightly different type though. Mine came off a 110. I may have forgotton to put the restrictors back in on re-assembly

No, the restrictors are much more restrictive than that!!. They are a cast block with a number of small holes with radiused entries.

Chris.