Jerry,
it depends on which kind of 123ignition you have installed. I suspect it's
the GB-6, which is the most suitable (and most common) for our Healeys.
Your ignition is far too much advanced. With this setting you'll ruin your
engine in a short time.
As a reminder: profile 8 is 100@1,000|170@2,000|330@4,500 (straight lines in
between)
If you calculate the advance your engine should have at 3,000 rpm with
profile 8 by interpolating (straight line) the values given at 2,000 and
4,500 rpm, you get 230 (to be accurate 23.40). You have measured
350@3,000rpm, which means you have advanced the ignition about 120
additionally to profile 8. This in succession will result in a maximum
advance of 450@4,500 rpm (accurately 44.60@4,500 rpm) and an idle ignition
of about 21-220 BTDC, both which are far beyond the values the Healey engine
will tolerate. I assume the vacuum line was disconnected when you did the
measurement.
I've had very good experience with profile B while setting the ignition to
320@3,000 rpm. This setting results in a maximum advance of 380@4,500 rpm
and an idle ignition of 150 BTDC.
Of course all the settings depend on the condition and tuning state of your
engine and the quality of fuel you're using. For a tuning guide for the
123ignition have a look onto our website.
Description of 123ignition:
http://brits-n-pieces.com/shop/product_info.php/info/p6786
Installation & Tuning guide:
http://www.brits-n-pieces.com/pdf/manuals/123ignition/123GB6RV.pdf
Eric
Brits'n'Pieces
Heinsberg/Germany
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
Im Auftrag von Jerry Costanzo
Sent: Dienstag, 29. September 2009 03:29
To: healeys@Autox.Team.Net
Subject: [Healeys] 123 distributor settings for 6 cyl
I have been having a little overheating and suspect the timing. I put my
timing light on the BJ8 this afternoon and see 35 degrees advance at 3000
RPM.
I have in my notes that someone said that profile 8 would work for our cars
so
I set the unit there. There are about 15 profiles to choose from. In
looking at the instructions, I wonder if the C profile might be better.
Any
advice from you experts?
I must say this distributor does make the car start easy.
Jerry
BJ8
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