If you've got some time, visit the F-Body or Mustang boards and check out
the forced induction forums. Track down the fast, knowledgeable guys and see
if they talk about timing curves or at least total timing. The info will
carry over to the Dodge as well. 24-25 degrees total at WOT is pretty much
standard. On a stroker, if anything, it will be a bit less because of that
longer arm crank. Too much advance only builds undesirable, excessive heat
in the motor or hurts parts. It won't make you faster and there's nothing
that sucks more than hurting a brand new motor you've spent a bunch of time
and money on.
You can try to ask Marty if he'll tell you what the timing curve looks like
and it'll give you some idea of how much retard you should be thinking. Your
vacuum sounds low which is gonna give you problems with a factory PCM. Marty
swears that cam will pull 13+ inches. I've never quite believed that. Did
you install it straight up?
Bob
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of Tim Berry
> Sent: Wednesday, November 05, 2003 5:22 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: RE: RE: Dyno'd the lil ol truck today....
>
>
>
> These are just baseline dyno's... I'm sure there's lots of fine tuning
> to do, but I'm still running an ooooollllld school F&B 50MM TB... Im
> going to step up to a 55MM or so, and put 30# injectors in and go from
> there... then up the boost...
>
> Its all KRC's work... the heads were used on the 360 I had before this,
> just 2.02 R/T heads, slight port work (just cleaned them up really), and
> the cam is a 220/230 w/ .507 lift on 1.6's, but I have 1.7s which comes
> out to .539 lift... I pull ~9-10" of vacuum at idle (yes, it's a 408,
> 8.2:1 comp ratio.
>
> The only things on the truck is a custom flashed PCM that KRC did for
> me, which is a N/A flash, and I'm using the BTM and FMU to tune for
> boost for the most part, and SAFC to fine tune the fuel...
>
> I'm not stepping up to the big boost until I get the injectors and TB...
> I'm going to start small and gradually go up from there...
>
> Tim Berry
>
>
>
>
> Tim,
>
> Overlay those graphs and I think you'll find the area under the curves
> is
> telling you a different story. Max timing is NOT the fast ticket with a
> boosted motor. MTBT or minimum timing for best torque.
>
> At peak you picked up 4 HP but that the expense of 12+ ft lbs. and the
> area
> under the curve is reduce signficantly. Common misconception about
> timing
> w/boost.
>
> Is that a 408? What cam and who did the heads?
>
> Bob
> >
> > I wanted to run it just to get some numbers outta her today... just
> for
> > sh*ts and giggles :P
> >
> > http://www.theoducrew.com/forums/showthread.php?s=&threadid=195
> >
> > theres the link to the videos, pics, and whatnot... :)
> >
> > Tim Berry
> >
> >
>
>
>
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