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tach reading was rev limiter

To: "buick" <buick-rover-v8@autox.team.net>
Subject: tach reading was rev limiter
From: "James Nazarian" <jhn3@uakron.edu>
Date: Sat, 26 Jul 2003 01:04:16 -0400
I can't speak to exactly what rpms I am hitting at the moment but I've
revved it into the realm of very unpleasant noises.

Will I do any damage by running it up into valve float (and maybe not
catching it for a couple of seconds.  I still want a rev limiter but I'm
curious.

Ok, the reason I changed the subject...My VDO tach reads smoothly and
accurately up to about 3200RPM above that it climbs faster then the engine
speed and gets bouncy.  I can't say for sure, because I am still tuning the
car, but the power seems to be falling off.  I've never experienced anything
like it but this is what I would imagine point bounce to look and feel like.
Somewhat erratic where the power is all there sometimes and other times it
seems to fall flat on its face.  However, it seems that if I slowly
accelerate through this range or hold a 3200+ speed I appear to read
accurately.

Last year, on the first engine, I set the dwell to the recommended 30 deg
using modern timing light with dwell function.  I checked it on the new
motor last week with a 30yr old home made dwell meter that was once accurate
but I have no way to check, it read 40 deg.

Anyway, I know one of the usual causes if my problems is shoddy primary
ignition parts but the points and condenser appear fine, and at the moment I
don't have spares to swap in.  The distributor is a "recurved" PO unit from
ebay but it is in VGC and appears to have all new components.

Can anyone throw some experience into the ring so that I don't end up
chasing my tail.  Thanks very much.

James Nazarian
71 MGB Tourer
71 MGBGT V8
85 Dodge Ram
----- Original Message -----
From: "Telewest (PH)" <paul.hunt1@blueyonder.co.uk>
To: "James Nazarian" <jhn3@uakron.edu>; "v8" <mgb-v8@autox.team.net>
Sent: Monday, July 14, 2003 5:10 AM
Subject: Re: rev limiter


> A friend fitted one to his factory V8 which I think just connected to the
> switched side of the coil.  I was a bit concerned about this as it was
> adjustable and he set it using the cars rev counter so that it was on the
> edge of the red line when the limiter was active.  Since the limiter cuts
> some firing cycles, and it is firing cycles that trigger the rev counter,
it
> seemed to me that the engine was probably spinning faster than the rev
> counter was indicating.  The needle certainly shot into the red at WOT and
> dropped back (to the edge of the red) once the limiter had cut in.  Could
it
> just have been the mechanical energy in the needle that threw it into the
> red i.e. it was a false reading?  Personally if I had been setting it up
I'd
> have slowly taken it towards the red and adjusted it to activate on a
slowly
> rising needle, rather than when it was fully active at WOT.
>
> ----- Original Message -----
> From: "James Nazarian" <jhn3@uakron.edu>
> To: "v8" <mgb-v8@autox.team.net>
> Sent: Monday, July 14, 2003 4:30 AM
> Subject: rev limiter
>
>
> > After a couple of incidents over the last few days, I have decided that
I
> > need a rev limiter post haste.

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