Heck the little engine in the PT cruiser is a ram effect. The intake is on
the rear of the engine and it travels over the top and comes in on the
front!! As a result you have to take the intake off to change spark
plugs!!!! They could have at least provided access to the plugs darn it!!
----- Original Message -----
From: "Rob P" <fristpenny@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, February 07, 2003 11:57 AM
Subject: Re: IML: Cross rams
> This is called "tuned" manifold, and one can improve volumetric
> >efficiency (possibly over 100%) with the tuning effect. The bad news is
> >that
> >the tuning is most effective for one engine speed, and the effects trail
> >off as
> >you deviate more from that speed (and can actually can reduce performance
> >for
> >speeds too far from the target speed, wither too high or too low).
>
> I believe the main problem with these was fuel distribution. With the
carbs
> so far from the chamber, the fuel had plenty of time to puddle in the
> manifold. It would be a super cool set up if combined with modern EFI and
> you put injector bosses at each cylinder. What RPM were they set up for? I
> used to think long = high rpm, but now I'm not so sure, isn't it based on
> the width which determines the velocity of the intake air?
> If you look at a GM TPI engine they have those tubes which go over the
> engine and they are really quite similar, except they are a lot less
> visually dramatic.
> Rob not an engineer
>
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