I had installed a Moss supercharger and a Sean Brown ported head on my
1969 MGB. I found that the advance curves on the stock replacement
distributors didn't yield the expected performance, so I installed the
123GB4RV. I currently use curve 7, with 22 degrees advance at 2000
rpm, and 30 degrees maximum advance at 4500 rpm. The old B is quite
zippy now.
Do you have the 123GB4RV or the 123MG4RV? The latter has the original
MG advance curves. And do you have a stock engine?
Don Laub
Burlington VT
> ----- Original Message -----
> For those of you using the 123ignition electronic distributor,
> what advance curves are you using?
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