I have been playing with my timing also, With it set at 20 Deg. it idles
poorly,But if I advance it off the Mark wow does it run great.Its a 79
Block with a 73 head which should make no difference. It runs cool no ping,
Power is great Vacume at 20 inches. Carl E.
Lawrence Alexander wrote:
> No, I didn't check the valve timing, John. I did check the integrity of the
> harmonic balancer to make sure it hadn't separated - it hadn't - but the
> possibility of a car running that well with cam timing off a tooth or so
> didn't occur to me...........
>
> Lawrie
>
> -----Original Message-----
> From: john c kahoon [mailto:john.kahoon@juno.com]
> Sent: Saturday, January 23, 1999 3:04 AM
> To: lawrence@britcars.com
> Cc: mgs@autox.team.net
> Subject: Re: 45 degrees advance at idle?
>
> Do you know where the valve timing was ? Maybe they run a little better
> with a bit of
> " anticipation " in the valve timing and lottsa advance to go with it .
> Hmmmm
>
> john.kahoon@juno.com
> 71 Midget
>
> On Fri, 22 Jan 1999 18:36:14 -0800 "Lawrence Alexander"
> <lawrence@britcars.com> writes:
> >Rick...........
> >
> >If it's any consolation, one of my customers had a 73 B that was one
> >of the
> >fastest stock Bs that I had driven. On one occasion, when the car was
> >in for
> >service, I decided I had to find out what made it so quick. To my
> >surprise,
> >the needles in the carbs were stock, the ignition system was as
> >original
> >except that the timing at idle was 45 degrees btdc! It didn't ping, it
> >idled
> >smoothly and it went like the clappers. Probably had something to do
> >with it
> >being a low-compression engine, as other cars I've tried to "speed up"
> >by
> >giving lots of advance have let me know (by severe pinging) that they
> >don't
> >want anywhere near 45 degrees of advance. So, if you notice no
> >detrimental
> >effects from that much advance, just enjoy it and worry about
> >something
> >else!
> >
> >Lawrie
> >British Sportscar Center
> >
> >-----Original Message-----
> >From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net]On
> >Behalf Of Rick Guynn
> >Sent: Friday, January 22, 1999 4:16 PM
> >To: MG List
> >Subject: 45 degrees advance at idle?
> >
> >
> >Hi all,
> >
> >Well I finally got around to playing with the timing on the 'B again
> >and I
> >am
> >befuddled.
> >
> >short history:
> >'73 'B w/'79 engine and ignition. I cleaned evrything and set the
> >timing.
> >Car
> >would bog and backfire when 'snapping' the throttle.
> >
> >Update: after trying everything I could think of (including checking
> >the
> >valve
> >timing) I finally decided to try playing with the timing again. I
> >advanced
> >and
> >retarded it to no avail. The I REALLY advanced it. Now to my best
> >estimate
> >I
> >have the timing set at about 45 degrees BTDC at appx. 1000rpm. The
> >bog is
> >still there a bit, but not nearly as bad and it no longer backfires.
> >I
> >haven't dared
> >to advance it any further. I have in the past checked to make sure
> >that the
> >crank pulley mark and the actual position of the the No.1 cylinder
> >were in
> >sync,
> >and it appeared that they were. I may have to check again. There is
> >no
> >noticeable signs of pinging. SO I'm stuck... any suggestions?
> >
> >Thanks in advance (no pun intended),
> >Rick
> >
> >
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