MG
The Classic Marque

Too rich ?

I remember when first commissioning my midget I was getting a lovely snap, crackle and pop on the over-run (just like racing cars). I adjusted the mixture (leaned it down) and then all was OK.

I was always under the impression it was caused by back pressure from the exhaust because of the exhaust manifold design, but thinking about it it would disappear or change when you switched to a tubular manifold so that blows that theory out the window.

Trev

The manifold piece is described variously as 'adapter' or 'one-way valve' depending where I look, the servo piece generally as 'one-way valve'.

I can't recall what either of mine (V8 and roadster) looked like when/if I had the hose off the manifold.

I can confirm it.

Going downhill closed throttle, circa 3000 rpm, switch off ignition, looooong growling uuuuuuuuurrrrgggghhhh exhaust note continues. BUT. NO snap crackle and pop. NO SPARK, but still the long growling uuuuurrgggghhh. So what is generating that noise?

When I DO switch on again, BANG. Exactly as Alan remembered. A loud sharp crack though rather than a big boom, an...

As long as the engine doesn't suck up oil and smoke it out of the exhaust, or fill the engine bay or cabin wuth fumes, I think the standard, esp' the y piece system, works well enough if you still have a low depression source to tap into.

For a webber you can do what I did to my Consul Capri. Simply use a pcv valve from a later Ford. It would work equally well on an A series. Early Fords ...

I had the same conversation yesterday re downsizing/decluttering to save the wife srress if I croak or become helpless soon. If I were alone though, I'd keep it all, even if I didn't use it anymore; including the Sprite.

But great idea Colin/Guy giving stuff to the men's sheds groups and the free groups. I'll have to check out my local groups to see what's around.

I wonder if any...

I wouldn't have the knowledge but an electric air pump could be set up to be variable, related to the engine revs. Given that crankcase pressure is very much a function of revs the extraction volume needs to be low at tickover and rise with revs. BMC struggled with this for A series engines over the years with methods ranging from passive breathing to venturi assisted then manifold depression and ...

I use the local Freecycle/Freegle system It works well in my location with enough 'members' within a 20 mile radius to keep the stream of offers, wanted and takers very active. You begin to recognise the regulars and I have made a number of friends of like minded people locally. I don't think it works as well in big cities where it all gets a bit anonymous and less commitment to the principles, mo...

Anton
It might pay to measure your crank pulley diameter, I think they're just under 35.5 dia.
and the groove the seal fits in is 9mm wide
a seal 35x47x9mm might fit better----

Yes, sorry - vacuum on both sides of the diaphragm, not atmospheric pressure. As politicians like to say, 'I mis-spoke'...!
So yesterday I started off by trying the brake pedal and it felt normal, not going solid on the next push (I had previously released the presure via the servo outlet union). I started the engjne and again, the pedal felt quite normal, and no locked wheels this time - it ...