I am trying to recall from some book I've read but I think the guideline
is to have the plenum volume match that of the total displacement of the
cylinders.
What I'm sure about is that increasing the length of the intake tract
will lower and enhance the low rpm powerband while shortening it will
help the top end. That's the reason for dual path intakes we see on some
of the new high performance engines.
Alan
'98 Dakota R/T (Headers, FABM & waiting for Shift kit)
'89 Mustang GT (347, Griggs, S-trim...)
Ducati 916 (someday)
-----Original Message-----
From: Bridges, Bruce [mailto:bbridges@alarismed.com]
Sent: Thursday, October 15, 1998 11:01 AM
To: 'dakota-truck@buffnet.net'
Subject: RE: [Fwd: Re: [Fwd: Re: DML: Intake
manifold, Was: High-end accel eration]]
Alan,
I was merely commenting on Nitrous Express's mopar
knowledege or actually I
was kinda hoping someone had put a full race B-1 motor
into a Dak... I do
know that a single plane "wet" manifold can be frought
with distribution
problems at low rpm and is usually gives up torque for
more high rpm
horsepower. with that said, Im not sure how it would do
in a Dakota since a
Dakota is a dry manifold. Most dry FI manifolds seem to
have a tuned runner
system that is fed by a large Plenum, possibly to
maximize velocity to each
individual cylinder with a even flow rate distribution.
The M1 single
plane has short runners and no plenum. What does it
mean to a Dakota? I
dont know. It will probably flow more than the stock
manifold, but will
the velocities be high enough at the low RPMs for truck
type torque with
adequate low velocity atomization?? Wheres my M1 and my
pitot tube
dammit...
Bruce K Bridges
stuck in an FI world with only carburator
experience.
-----Original Message-----
From: Alan Short [mailto:ashort@flash.net]
Sent: Thursday, October 15, 1998 9:48 AM
To: dakota-truck@buffnet.net
Subject: [Fwd: Re: [Fwd: Re: DML: Intake manifold, Was:
High-end
acceleration]]
Bruce, please forgive my ignorance, this is MY first
MOPAR. If I'd known
about the B-1 not fitting, I wouldn't have asked. Now
that that's out of
the way, let's assume it's an M-1 and repeat the same
question, what do
you know about the performance of this manifold and is
it an intake AND
exhaust , or intake only. Alan S.
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:10:39 EDT