[Healeys] Tapping SUs for air filters.

Chris Dimmock austin.healey at gmail.com
Fri Nov 23 17:07:31 MST 2018

Hi Simon,
The later HIF44 SU carbs are already tapped for an air cleaner, so I don't see an issue. 

I'm running this on the HIF44 on a 1275 A Series for my Austin A35 Van project 


Sent from my iPhone
> On 23 Nov 2018, at 1:15 am, <simon.lachlan at alexarevel.plus.com> <simon.lachlan at alexarevel.plus.com> wrote:
> I’ll be removing my carbs soon in order to achieve clearance for raising (the front of) the engine. (Harmonic balancer installation).
> So, it struck me that I may give my 3 HD6s another go. Swap them with the current setup.
> Thinking it through and looking at the big box of bits, I recalled what a pain it is to get the nuts and two washers onto the bolts that hold on the air filters. I have French manufactured K&N lookalikes. The bolt starts inside the filter, goes through the carb and gets two washers and a nut. Very awkward to deal with those nuts and washers. PITA.
> I thought that I might put in helicoils then I thought “Why not tap the holes?”
> The holes on my HD6s are 11/32” or 8.8mm.
> I am no engineer but it seems to me, from looking at tables on Google, that I could use a 25/64” drill bit and tap them out to 7/16”. I have both the drill and the tap but would like some expertise applied to the issue before I start drilling.
> Any input would be much appreciated.
> Thanks,
> Simon
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