Re: loss of power at high speeds...

[Kevin Curry <kevin@domain.elided>]

"Neff, Matthew John - MBA" wrote:

> Quick question: (maybe not so quick)
>
> I've got a '73 Scout II with the following:
>
> V345
> Edelbrock Perf 600 4bbl (squarebore manifold)
> MSD 6A
> Holley points distributor w/ pertronix  (timed @14deg btdc)
> Accel coil/wires
> Bosch Platnium Plugs (gap: .045)
> Single exhaust w/dynomax muffler
>
> Otherwise stock
>
> Here's the scenario:
> I've recently installed the MSD (thanks all for your help) and notice a lack
> of power at the high end, as well as while climbing hills.  What makes me
> think that this is odd is that I also hear an uneven, raspy noise from the
> exhaust when I'm accelerating hard up hills, particularly when I'm in the
> left lane next to those Jersey Barricades on the freeway.  Any Ideas?  I
> heard this noise before installation of the MSD, so I don't think that's a
> factor... Also of note, I can set the timing upwards of 16-18 degrees
> without any pinging. The distributor has been recently rebuilt and the
> vacuum advance is new.  This one has me confused...
>
> Thanks in advance.
>
> Matt Neff
> Beaverton, OR
> (who wishes he had $800 for the 5-speed od tranny...)

Could it be that you have a rev limiter included in the MSD package? That's what
it sounds like to me. Dunno about the exhaust noise, though.


--
"It's not a matter of no one else being able to keep up. It's a matter
of no one else being able to follow." -from my Hummer poster

SC4x4EI - Home of "TK SLiders" www.muddyjeep.com
Kevin Curry <>< - Kevin@domain.elided
Lisa Curry <>< - Gonna be a trailblazer yet!
'94 Red Hummer 4DHT Slant-back - "HummuH"
'75 Black International Scout - "Stealth"
'84 White "Lightening" CJ-7
'89 Soon to be whatever color Lisa wants Suburban - "Sluggo"
ICQ# 7653541
http://www.redhummer.net