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K&N Air Filters for SU HD6 carbs

Lin

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Hi folks,Looking for some help. I don't have the SU HD6 carbs (1960 3000 BT7 MKI, two carbs) in my possession at the moment, but I am trying to determine the right model# of K&N air filters to fit the HD6 carbs. I am not worried about the vent from the rocker cover to the rear air filter. All I am interested in is the fit of the air cleaner backplate to the carb.
Anyone know for sure if this air filter will fit the HD6?


https://www.knfilters.com/search/product.aspx?prod=56-1400


If this is incorrect but you know the correct model number, I would appreciate hearing from you.


I tried the K&N 800 number but while very courteous the two people I spoke with didn't have a clue about SU carbs. I was asked if it was a "kind of weber?"


Thanks very much!!!


Lin
 
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Lin

Lin

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Steve and Charlie,
Thank you both! I appreciate the information you sent. I am actually wanting to use the K&Ns on my Jaguar MK2 restoration. The Jag also uses HD6 carbs. You can't find any info on using these filter on a Jag, but I knew there was good info available from the Healey community. I have not yet determined if I need offsets or not. But, the information you and others have provided gets me going. Thanks very much!

Lin
 
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I apologize for my unsolicited opinion, but I'm not a big fan of K&N filters; if you hold one up to the light, you could read a newspaper through it. A comparably sized paper element will give your engine far better filtration and protection. K&N claims their filters will flow more air at 100,000 miles than a paper element, while probably true, I don't know anyone that would leave a paper element on a Jag or Healey that long without checking it.

Another reason to avoid them on any modern car, is an over-oiled reusable element-type filter can take out a $300.00 MAF in only a few thousand miles. Three hundred dollars ($300.00) would buy a lot of paper filters!

The actual cost for this 2001 ///M Rdstr owner was $325.53, plus my diagnostic time (didn't show up as a DTC, but the engine wouldn't rev over 3500 RPM and then go into "limp" mode). While this differs from popular opinion of the brand, I've come across it a few times now

IMG_8043.jpg




IMG_8044.jpg
 
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Lin

Lin

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Hi Randy,
I do value your opinion and I have heard about the problem with K&Ns on BMWs and perhaps other cars as well. Is over oiling the problem or is the problem inherent to the filter?
Lin
 

healeyblue

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Over oiling is the problem (maybe even proper oiling). The modern Porsche's suffer the same problem. The oil becomes airborn and deposits itself on the hot wire of the air temp sensor/air flow sensor and shorts it out. Sometimes cleaning them, revives them but most times not.
 

steveg

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Over oiling is the problem (maybe even proper oiling). The modern Porsche's suffer the same problem. The oil becomes airborn and deposits itself on the hot wire of the air temp sensor/air flow sensor and shorts it out. Sometimes cleaning them, revives them but most times not.

The above issues don't really sound relevant to the Healey.

Also, are there even any paper filters available for our SUs? seems like we're stuck with either the stock gravel strainers or K&Ns.

I've used the K&Ns for maybe 11 years with maybe one cleaning/re-oiling and the carbs and intake tract seem to be clean.
 
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Randy,
what do you use on your BN6?
Lin
I have Weber 45 DCOEs and found some paper retangular filters; they may have been sourced from an MGB/Weber conversion (and are probably due for inspection/replacement...).

It's been so long since I've seen a set of stock SUs on a 100/6 (or early 3000) that I can't visualize how much space there is to work with, but I'd try to come up with a simple base/cover and see if I could get the stock MGB paper filters (cylindrical shape) to fit.

"Gravel strainers" yes, that's a good one! I always said that the only thing they would keep out, is the cat. ;)
 

steveg

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IMHO the K&Ns are getting a bum rap here for Healeys.
Just took off my domes and in 2 years-approx 7k miles of driving in a dusty environment, the inside of the carbs are clean.
CleanInterior.JPG
Here's the exterior of the carb:
DustyCarbExt.jpg
I agree you can see daylight through the filter element but they definitely do the job on a Healey.
 
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