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MG MG Y Type - Air filter

I seem to recall it being possible to fit a K & N filter in place of the big round cylinder on the Y...anyone know if it's worth doing.
D MULLEN

Purely a guess Dave ... but probably not. What are you hoping to achieve by fitting one? Curious!!

Paul
Paul Barrow

Apparently it does away with the elbow on the carb and the big round filter ...and has an easy replacement filter .
D MULLEN

It would ... but its not that hard to clean the cylinder (home models) and there would be no (perceptible) performance benefit for the cost of K&N filters but up to you.

The kit you would want would probably be the same as for a single carburettor BMC/BL Mini.

Paul
Paul Barrow

It was nothing to do with performance just recalled it looked neater but if it's costly I probably won't bother.
D MULLEN

Dave

So just a quick further note on this question you asked about replacing the original cylinder air cleaner with a K&N pancake style filter. I was just idly watching Series 15 Episode 13 of Wheeler Dealers where "Ant" is working on a Porsche 996 where someone had replaced the original air filter that drew air in from outside the car with a $400+ after market kit that sits inside the engine bay. He points out that this is a bad idea since the air inside the "bonnet" is about 100 degrees Celcius hotter and that drawing in the hot air into the engine is a bad thing as it decreases combustion as hot air is less dense. In fact he states that the density is equivalent to a 6,000 foot elevation change and equates to a 20% horse power reduction. In the Porsche that lowers it from 300hp to 240hp ... in our case the loss is only about 9hp not 60hp ... but going from 45hp to 38hp ... well, I'll let you draw your own conclusions too!

The OE Air Cylinder arrangement comes over the top of the engine to to cooler side, away from the heat of the exhaust pipe. I know some will say that with the enclosed nature of the bonnet it doesn't make that much of a difference but I'll take my chances that those boffins at Nuffield Engine when the worked up this arrangement had a good idea.

As always though, you pay your money and you can make your choices!

Thought provoking at least!

Best wishes

Paul
Paul Barrow

I fitted a single 1.5" carb. since the old air cleaner no longer fitted a pancake type replaced it. The only problem is that the air cleaner is now a bit close to the steering column and check the accelerator cable run. Bryan
B Mellem

The T type people have fitted K and N filters of various types inside the original air "filter" dustbins in an effort to achieve a setup which does some actual filtering as opposed to just catching rocks and small children. In fact it operates more as an intake silenser than a filter. I have just such a setup on my TC and it works well inside the housing which originally came on my YB. I used this one as being an aftermarket repro. it was easier to take apart. I have a vague recollection that the original Y type filter body is slightly different from the T type one though but I now have another which has been somewhat butchered but with some TLC should work well on the Y type with new guts fitted when I get it back on the road.
Regards
Ian
ian thomson

Dave I recall fitting a K and N filter in the a/f cylinder. I am sure that I adapted one end of the box and fitted the K and N filter not brilliant but cleaner and far less messy than the original.
On the YT I simply adapted the arrangement that NTG supply aa a modification for the TD a/f. It uses a large K and N
filter to fit in the filter unit It works well and is far better than the messy oil bath. Not original but practical.
JERRY BIRKBECK

Nothing to do exactly with the question but interesting that during the war the Merlin aero engine was fitted with a carburetor where as the Mercedes had direct fuel injection. With the carb. latent heat of evaporation before supercharging so increased the fuel air density that it gave a useful increase in power output, compared with direct injection.
Quote - Hooker [Not Much of an Engineer]
B Mellem

My filter modification, the intake is now much closer to the bonnet side louvres and cooler air plus the shield prevents hot air reaching the carburettor. Note the throttle cable run Bryan

B Mellem

Bryan - the advantage of the fuel injection was that the Mercedes engine didnt starve out when inverted or in a power dive too! I think the later Merlins went over to Fuel Injection didnt they?

Paul
Paul Barrow

I will have to re read my edition of Hooker but I think there was an American design inverting carburettor.
Certainly the pilot of a Focke Wulf 190 which for a time the scourge of the RAF had a great shock when thinking he could out climb the Mk5 Spit found a Mk9 alongside. If it is of interest I remember those hot Autumn days watching the twisting vapour trails in the sky high above my home. Bryan
B Mellem

This thread was discussed between 31/03/2019 and 25/04/2019

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