[Healeys] BN1 PCV system

Sun Jan 31 12:16:12 MST 2021

This has made me realise that my PCV valve setup is missing the fresh air side of the equation. Seeing the improvement that I’ve noticed with my current arrangement, the other piece of the puzzle should lead to a very clean runner.

Stephen, BJ8 

Sent from my iPad

> On Jan 31, 2021, at 1:15 PM, Harold Manifold <manifold at telus.net> wrote:
> 
> In my opinion providing a dedicated air intake and separating the streams is a step in right direction. This sketch below is what I am planning. One possible addition would be a simple air oil separator on the return line but I am hesitant to add too much strange looking hardware if it can be avoided.
>  
> I would appreciate any feedback and comments.
>  
> Harold
>  
> <Possible PCV System.JPG>
> 
> From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Michael Salter
> Sent: Sunday, January 31, 2021 9:41 AM
> To: Bob Spidell
> Cc: healeys at autox.team.net
> Subject: Re: [Healeys] BN1 PCV system
> 
> I have decided to cut some "plugs" out of a chainsaw foam air filter and insert them into the rocker cover hose. I'm thinking that flow in that hose will be the source of intake air into the engine.
> 
> M
> 
>> On Sat., Jan. 30, 2021, 8:45 p.m. Bob Spidell, <bspidell at comcast.net> wrote:
>> The best place for a fresh air source would be a small filter on the oil 
>> filter cap. Obviously, not an easy thing to rig up. Or, you could put a 
>> tube on the backside of one of the carbs, but you'd want a better filter 
>> than the stock grasshopper-stoppers.
>> 
>> On 1/30/2021 3:48 PM, Harold Manifold wrote:
>> > I am also looking into a PCV system for my BT7 as well. Most of the PCV
>> > systems I have seen on Healey's don't have a filtered fresh air intake and
>> > don't have much ability to replace the blow by and other nasty's that will
>> > accumulate in the bottom of the block. To have air changes in the bottom of
>> > the block a filtered fresh air source is needed and slight vacuum to draw
>> > out anything that accumulates. Ideally the fresh air would come in at one of
>> > the block and the bad air leave at the other end. There is a connection
>> > between the tappet section and the bottom of the block but this is also the
>> > oil return. (A BN1 engine may be different) A PCV can be used to control the
>> > system but if the air circulating bypasses most of the engine then the
>> > system is less effective. On V8 engines the clean air comes in through one
>> > valve cover, passes through the bottom of the block and then exists via the
>> > other valve cover drawn by vacuum from the intake.
>> >
>> > Any good ideas where to locate a filter fresh air source?
>> >
>> > This website has excellent information on PCV valves and is where I found
>> > the attached article by Tony Ball.
>> >
>> > http://mewagner.com/
>> >
>> > Harold
>> >
>> >
>> >
>> > -----Original Message-----
>> > From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bob
>> > Spidell
>> > Sent: Saturday, January 30, 2021 2:41 PM
>> > To: healeys at autox.team.net
>> > Subject: Re: [Healeys] BN1 PCV system
>> >
>> > Looks clean, Michael. I am considering similar for my BN2 (but I plan to fab
>> > a plate with an elbow to replace the road draft tube). If you plug the valve
>> > cover vent, you'll have a 'system' similar to what I have on my BJ8, which
>> > is an updated version of the original Norman Nock design.
>> > This isn't really a PCV system, as the crankcase and valve cover will be
>> > under continuous vacuum. I suspect some air is drawn in from the rear
>> > 'seal,' which is not filtered but helps to alleviate the infamous Healey
>> > bellhousing drip, and likely doesn't affect mixture all that much. If you
>> > leave the vent open--I'd put an air filter on it--you'll have a genuine PCV
>> > system as air will be constantly circulated through the crankcase and top
>> > end. This is what I plan to do, but my 100M is vented to the CAB, for which
>> > I have a large K&N filter on the intake duct in front of the radiator.
>> >
>> > Which PCV valve did you select?
>> >
>> > Bob
>> >
>> >
>> >
>> > On 1/30/2021 12:20 PM, Michael Salter wrote:
>> >> After months of deliberation I have constructed this PCV system for my
>> >> BN1.
>> >> The original road draft tube has been plugged just below the PCV valve
>> >> takeoff.
>> >> Of importance was that the system would be almost impossible to see
>> >> without very close inspection.
>> >> I'm still trying to decide if I should plug the normal valve cover
>> >> vent or leave it open to serve as the PCV system intake.
>> >> Thoughts?
>> >>
>> >> M
>> >>
>> >
>> 
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation  $12.75
>> 
>> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
>> 
>> Healeys at autox.team.net
>> http://autox.team.net/mailman/listinfo/healeys
>> 
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>> 
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
> 
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
> 
> Healeys at autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
> 
> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/s.hutchings@rogers.com
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20210131/700b80cc/attachment.htm>