[Healeys] Centering the Jet - HD8 carbs

[Bob Spidell]

Alan,

I've had good luck centering the jets with the little brass "drift" that 
comes in those cheap (~$20) SU balancing kits (the ones with the two 
bent wires for comparing piston levels).

I don't have my SU book with me, but I recall asking the List and the 
consensus was the bottom of the groove--closest to the tip--of the 
needle should be flush with the base of the piston.  I changed mine and 
it made a substantial difference in mixture setting.

bs

Alan Seigrist wrote:
> Hi All -
>
> I have the HD8s out of my BJ8 for a soft rebuild, and now that I have it all
> together, I am having a real problem centering the jet on one carb.
>
> It all lines up and works just fine until I screw down the dashpot cover...
> then the needle binds on the jet causing the piston to get stuck, or to bind
> a bit.
>
> I've tried about three different ways over about three hours to center the
> jet, none of them have worked.  Can anyone give me a step by step that will
> get this stupid jet centered properly so that the piston will move freely?
>
> BTW I've put the needles in to where the needle's notch is just below the
> dashpot piston bottom (i.e. top of the needle's notch is flush with the
> piston bottom).  Have I put it in far enough?
>
> Thanks,
>
> Alan
>
> '52 A90
> '53 BN1
> '64 BJ8
>   
-- 
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Bob Spidell         San Jose, CA        bspidell at comcast.net
'67 Austin-Healey 3000             '56 Austin-Healey 100M
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