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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars

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carb air filter confusion

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Old Nov 20th, 2018, 12:37   #21
arcturus
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Drawing in clean cold air. Quieter. If you can find a smooth flex tube of same diameter even better. Gives a bit of ram air effect, I have an extension tube from filter box to front of bulk rad' panel. Will take a better photo later
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Old Nov 20th, 2018, 14:06   #22
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I think I understand something that has confused me so far in this thread.

Dai = Classic Swede

Is that correct? That is why mocambique-amazone keeps referring to Dai, even though there doesn't appear to be anyone of that name on the forum.

Am I being stupid?
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Old Nov 20th, 2018, 19:58   #23
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You are not stupid, you proved instead with your last post to be intelligent .

Yes : Dai = Classic Swede

Kay = Mocambique-amazone

George = Arcturus

Peter = peterjohnbull
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Old Nov 20th, 2018, 23:01   #24
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Kay;

That fuel supply line was friction fit only by Volvo to begin with, without ANYTHING else securing it into place, and I agree it doesn't need anything...so if someone added a nylon wire tie, which are typically rated to (105Deg C) 94V0* (self extinguishing nylon), to snug this line onto the fitting just a bit, it wouldn't bother me as much as it apparently bothers you...

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* Reference: https://www.professionalplastics.com...onsForPlastics
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Old Nov 21st, 2018, 00:01   #25
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As mentioned above, the plastic rectangular air box was standard fit for the B20 twin carb engines from late '68 to 1970. It was used on Amazons and 144s (possibly beyond 1970), not sure about the P1800. It is claimed to be the best breathing Volvo arrangement, but quite hard to find. They do come up on eBay periodically for about £90+

I've had one on a '68 (B20B) 144S and a 1969 (B20B) 122S

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Old Nov 21st, 2018, 08:42   #26
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Hy Ron.
I know about the original way.
A ziptie makes it worse
It will deform the tube from circular to an form like a drop with a "cone" or "triangle"
Zipties are strong beloved from the factory at later cars, to mount the wiring.
Never ever someone should use them to safe a tube for fuel.

I agree: nothing or a proper clamps

Have a nice day, Kay
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Old Nov 24th, 2018, 13:31   #27
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Anyone got these?
https://www.demon-tweeks.com/k-n-fil...E&gclsrc=aw.ds

and can tell me what size will fit nicely under my hood?

I do have foam stuck to the underside of the bonnet, but can whittle that down or remove if required.

Cheers

Pete
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Old Nov 24th, 2018, 19:39   #28
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Would look a little silly under your hood and be hard to keep balanced on your head

However if you plan on mounting them to the engine bonnet clearance is no problem hover clutch cylinder clearance can. Fitted a set a few years ago and had to slot the holes for the rear carb to gain some clearance on the clutch MC
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Old Nov 24th, 2018, 23:32   #29
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The K&N filters you link to are ridiculously expensive but it's your money. There is nothing wrong with what you have and are correct for a '65. Filters that tuck into the outer plate correctly are hard to find, as you will have noted with your orange Fram type ones. The Brookhouse black ones may be better. You can stop them crushing down as shown in your pictures by adding a suitable washer and nut combination so that the cover rests on that when the wing nut is screwed down. Always have the nut on last. A washer can drop into the carb and you might not notice. There is probably a market for a nice wide topped screwed spacer to keep the cover square and secure. Anyone with access to a lathe fancy having a go? Russ? Besides using an alloy it could be made from nylon or even hard rubber.

Alternatively, the screw fixing could be replaced by a much longer bolt to allow a much wider filter.
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Old Nov 25th, 2018, 10:20   #30
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They were good enough then!
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