Tim,
Ill add my .02
with a centrifugal supercharger your boost comes on at a fairly high RPM.
The stock manifold is designed to assist low end torque with the long runner
design. You are essentially running N/A at low rpms so the "impulse tuning"
and long runner effect will provide a bigger bottom end. At high rpms, the
boost is up (positive pressure, no impulse tuning) and the manifold is just
a bunch of pipes to the head. The lower restriction those pipes are, the
more airflow you will get into the motor at a cooler temperature. The more
restriction the supercharger is fighting against the hotter the delivered
charge... The M1 manifold has much lower restriction than the beer barrel.
Its a trade off fer sure!
Bruce
----- Original Message -----
From: "Tim Berry" <coolva1@cox.net>
To: <dakota-truck@buffnet.net>
Sent: Wednesday, February 06, 2002 3:43 PM
Subject: DML: Re: Intake theory with superchargers.
> When I had my PD and M1 (4bbl) I still didnt have power till above
4000RPMs
> I've had best results with the untouched stock intake... pulls like a
beast
> to 6000... (well... till I blew the motor) :-D
> If I end up doing a 360.. I may invest in a 2bbl single plane intake as
> well....
>
>
> Tim
>
>
> > I have a question/thought for you brains out there.
> >
> > As some of you may know, I bought a used P/dyne s/c and have a few
engine
> > questions related to that. I have a M-1 4bbl intake on my 360 right now.
> > Will I benefit from a MPI 2bbl intake since the 2-bbl will give me more
> > torque because of the longer runners?
> >
> > My thoughts are that since the s/c is pressurizing the air, runner
length
> no
> > longer makes any impact, and that the larger runners in the M-1 will
allow
> > more airflow and more top-end power. Am I wrong?
> >
> > Mark Kuzia
> > flyboy01@mediaone.net
> > http://people.mw.mediaone.net/flyboy01/home.html
> > 1995 Dakota 13.79 @ 102.45 mph "Fastdak"
> > ~Supercharged 360ci, 5-spd, 8 3/4 rear / 3.90-SG
> > 1994 Dakota 15.36 @ 91.56 mph
> > ~318ci, 5-spd, 3.90 LS (bone stock, no mods)
> >
> >
> >
>
>
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