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Re: Odd ignition problem?

To: "Mark J. Bradakis" <mjb@autox.team.net>
Subject: Re: Odd ignition problem?
From: "jaboruch" <jaboruch@adelphia.net>
Date: Tue, 4 May 2004 22:28:34 -0400
A Crane ignition was my only DNF in 1998, the first race that I used
it in.  I took it out and returned it to Jegs and went back to just
using the Mallory dual point and the ignition has been trouble free
since.  On the Dyno I tried an MSD box and the dual point and both
made the same HP and torque.  My suggestion is to stick with just the
dual point.  Remember KISS.  Joe(B)

----- Original Message ----- 
From: "Mark J. Bradakis" <mjb@autox.team.net>
To: <fot@autox.team.net>
Sent: Tuesday, May 04, 2004 4:48 AM
Subject: Odd ignition problem?


> Even though there is no IVR race this weekend, there is still a
chance
> we'll have an event next month, and there's a few autocrosses I'd
like
> to attend in the interim.
>
> But I'm having an odd problem.  Well, two, actually, but one you
folks
> can't do anything about.  I bought a new chair for my home office
this
> evening, and it has a much higher back than my old one.  I keep
spinning
> around thinking there's someone behind me ;-)
>
> At the last IVR race before I melted the rear axle pinion and
bearings,
> I was having some trouble with Killer.  The car would fire right up,
idle
> smoothly, run great and pull strongly up to about 5600, maybe 5700
rpm.
> Then it would start cutting out smoothly, like it does if hitting
the rev
> limiter on the Crane HI-6 box.  This would happen sitting in the
paddock
> in neutral, or pulling hard on course.  It must be an ignition
problem,
> and not a fuel delivery issue, or the cutout point would be
different
> for idle and load, right?
>
> At first I figured that the rapscallion who broke into the shop over
> the winter and replaced my driver's suit with an identical copy that
> was an inch or two smaller in the waist was responsible for turning
> down the rev limiter.  But such is not the case.
>
> Last week I got to messing with it some.  The setup is a Crane HI-6
> ignition box triggered from the points in a Mallory dual point
distributor.
> We're talking a mostly stock Spitfire 1500 cc motor here, stock
head, stock
> cam, 9:1 CR, basically an SCCA Solo II FSP legal engine, with dual
Weber 40
> DCOEs choked down to within an inch of their life (actually 28 mm)
and your
> generic 4 into 1 header.  Timing at 12 degrees BTDC, point dwell
within
> spec.
>
> With Crane HI-6 ignition box, Crane coil, Mallory dual point
distributor,
> car runs fine up to 5700 rpm, then starts cutting out.  When rev
limiter
> set to revs below 5700, motor cuts out at setting.
>
> With Lucas coil hooked to ignition, Crane box completely out of the
picture
> car runs fine up to 5700 rpm, then starts cutting out.  It isn't the
> Crane ignition box.  With Crane coil wired direct instead of Lucas
it
> runs fine to 5700, then starts cutting out.  It behaves the same
with
> either coil, wired directly to power or through the HI-6.
>
> With new plugs, new points, new wires, new cap, new rotor and the
Lucas coil
> still in place car runs fine up to 5700 rpm, then starts cutting
out.  Same
> with Crane coil.
>
> Lucas coil removed, Crane box wired back in, car runs fine up to
5700 rpm,
> then starts cutting out.
>
>
> So where in the fuel system should I start looking for the problem?
>
> mjb.

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