Dave:
The plugs that you are using N9Y, are too cold for a TD/TF. Use N-5 or B6ES
NGKs. WR7P Bosch Platinum, work very well. Thats what I use.
As far as needles, I use a GL needle. It works perfect with Open carbs
increased comp and bore, and especially with derrington extractor exhaust.
The GJs are too lean at hiway speeds, with a performance setup. The HIs are
just plain wrong. Too rich at low speeds, and docile at hi speeds. I have
been fooling with this type of stuff for over 37 years, and love it.
Cheers:
Skip..................At 06:03 PM 7/1/97 +0000, Dave Houser wrote:
>Just got back this weekend from the T-register meet up in Boston and a
>couple of questions came up without answers, so I come to this learned
>group of MG savvyists.
>1- We must have covered sparkplugs before but maybe not the modern day
>types now available(Is there a FAQ?). I've been running Champion N-9Y's
>since I've got 1/8" off the head, .040 overbore, 1-1/2" SU's, GJ
>needles, twin fuel pumps(ala MK. II TD), 4.3 MGA rear. I think I should
>be using a colder plug and want any recommendations you can offer. Old
>plugs look rich, with black deposits and white crud on top of electrode
>after a run back from Boston(200+ miles). Tail pipe pretty black, starts
>with very little choke, if any at all, jets all the way UP!
>2- I've got a knock over rough roads that is from the inner steering
>ball joint. If you push the headlight bracket down, it clunks(thought it
>was a worn sway bar bush). Any ideas on what to do there? Fill it with
>grease to help quiet it down?
>
>Thanks in advance,
>Dave Houser
>
>
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