[Healeys] K&N air filter

[Bob Haskell]

Alan,

I like the idea of using a PCV valve.  Not sure how to fit one to the 
rear tri-carb manifold.  Anyone do it?

The original Coopers filters fitted to the tri-carb are roughly 5" in 
diameter for about 20 square inches.  If I got the correct equation (new 
word for the day: frustum of cone) from of my copy of Machinery 
Handbook, the K&N 59-9320 filter has an area of around 25 square inches. 
  Ought to be adequate, but I don't have a flow bench to confirm.

The dual carb setups have a larger air filters, so I would think/agree 
that a filter larger than the 59-9320 would be required.

Cheers,

Bob

AlanB wrote:
> Team.
> I have been in touch with K&N and they identify Part number 56-9247 as the
> most appropriate for a 3000 with two carbs.
> http://www.knfilters.com/search/product.aspx?Prod=56-9247
> It is a classic pancake filter with a diameter of 6" and a depth of 2". A
> bit bigger than the 59-9320 but then we have almost double the displacement
> of an MGB.  The backing plates are blank and have to be opened up to match
> the HD6 or 8 carbs. That gives the opportunity to offset the rear one lower
> to clear the shroud.
> 
> As for the breather hole, my vote is don't bother. Fit a PCV valve as
> detailed in Norman's Tech Talk. A superb and discrete mod that completely
> eliminates the oil leaks caused by crankcase pressure. I fitted the air
> filters and PCV to my BJ8 and will be doing the same again to my modified
> BN4 which will soon be fitted with a slightly breathed on 3000 engine. DWR
> cam, gas flowed head, HD8's.
> Read about the PCV mod at
> http://www.nfahc.co.uk/PCV/
>  _____________________________________________
> (______________ Alan Bromfield _______________)
>       (______ \____1957-BN4____/ _______)
>           (_________________________)