<div dir="auto">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.<div dir="auto"><br></div><div dir="auto">M</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat., Jan. 30, 2021, 8:45 p.m. Bob Spidell, <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The best place for a fresh air source would be a small filter on the oil <br>
filter cap. Obviously, not an easy thing to rig up. Or, you could put a <br>
tube on the backside of one of the carbs, but you'd want a better filter <br>
than the stock grasshopper-stoppers.<br>
<br>
On 1/30/2021 3:48 PM, Harold Manifold wrote:<br>
> I am also looking into a PCV system for my BT7 as well. Most of the PCV<br>
> systems I have seen on Healey's don't have a filtered fresh air intake and<br>
> don't have much ability to replace the blow by and other nasty's that will<br>
> accumulate in the bottom of the block. To have air changes in the bottom of<br>
> the block a filtered fresh air source is needed and slight vacuum to draw<br>
> out anything that accumulates. Ideally the fresh air would come in at one of<br>
> the block and the bad air leave at the other end. There is a connection<br>
> between the tappet section and the bottom of the block but this is also the<br>
> oil return. (A BN1 engine may be different) A PCV can be used to control the<br>
> system but if the air circulating bypasses most of the engine then the<br>
> system is less effective. On V8 engines the clean air comes in through one<br>
> valve cover, passes through the bottom of the block and then exists via the<br>
> other valve cover drawn by vacuum from the intake.<br>
><br>
> Any good ideas where to locate a filter fresh air source?<br>
><br>
> This website has excellent information on PCV valves and is where I found<br>
> the attached article by Tony Ball.<br>
><br>
> <a href="http://mewagner.com/" rel="noreferrer noreferrer" target="_blank">http://mewagner.com/</a><br>
><br>
> Harold<br>
><br>
><br>
><br>
> -----Original Message-----<br>
> From: Healeys [mailto:<a href="mailto:healeys-bounces@autox.team.net" target="_blank" rel="noreferrer">healeys-bounces@autox.team.net</a>] On Behalf Of Bob<br>
> Spidell<br>
> Sent: Saturday, January 30, 2021 2:41 PM<br>
> To: <a href="mailto:healeys@autox.team.net" target="_blank" rel="noreferrer">healeys@autox.team.net</a><br>
> Subject: Re: [Healeys] BN1 PCV system<br>
><br>
> Looks clean, Michael. I am considering similar for my BN2 (but I plan to fab<br>
> a plate with an elbow to replace the road draft tube). If you plug the valve<br>
> cover vent, you'll have a 'system' similar to what I have on my BJ8, which<br>
> is an updated version of the original Norman Nock design.<br>
> This isn't really a PCV system, as the crankcase and valve cover will be<br>
> under continuous vacuum. I suspect some air is drawn in from the rear<br>
> 'seal,' which is not filtered but helps to alleviate the infamous Healey<br>
> bellhousing drip, and likely doesn't affect mixture all that much. If you<br>
> leave the vent open--I'd put an air filter on it--you'll have a genuine PCV<br>
> system as air will be constantly circulated through the crankcase and top<br>
> end. This is what I plan to do, but my 100M is vented to the CAB, for which<br>
> I have a large K&N filter on the intake duct in front of the radiator.<br>
><br>
> Which PCV valve did you select?<br>
><br>
> Bob<br>
><br>
><br>
><br>
> On 1/30/2021 12:20 PM, Michael Salter wrote:<br>
>> After months of deliberation I have constructed this PCV system for my<br>
>> BN1.<br>
>> The original road draft tube has been plugged just below the PCV valve<br>
>> takeoff.<br>
>> Of importance was that the system would be almost impossible to see<br>
>> without very close inspection.<br>
>> I'm still trying to decide if I should plug the normal valve cover<br>
>> vent or leave it open to serve as the PCV system intake.<br>
>> Thoughts?<br>
>><br>
>> M<br>
>><br>
><br>
<br>
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