Intake manifold-was Re: megasquirt

[urq]

... I've always felt that the Audi IM technique is a good start ... there
are identical runners from the "log" ... if the air was not flowing from the
front to the back it might not be so bad.  My thinking is that something
that can probably go a long way towards fixing the problem is to create some
turbulence in the flow into the IM.  I've also wondered if some sort of
device in the IM "log" to help direct the airflow back toward the front
might help.

Perhaps a good way to go would be for the TB to be mounted in the middle of
the "log" with the airflow aimed away from any particular runners ...

No matter what you do it is likely that there will be differences between
the cylinders ... that is why I'd love to find a system that measured the
ionization in each cylinder after ignition and tweaked the mixture for each
cylinder individually.  This was the goal of the project on DIY-EFI (from
which megasquirt was born) ... and I think that this capability is being
considered as an add on ...

Steve Buchholz
San Jose, CA (USA)


> Javad wrote:
> > Hmm, with the known flow inconsistencies of the 10v IM, this seems like
a
> > really bad idea, good luck getting any predictable amount of fuel to any
> > particual cylinder.
>
> On the topic of the flow inconsistencies of the 10v IM.....
> I'm in the process of making a new intake manifold for the 10v. I'm
looking
> for any ideas on how to make it flow the most evenly. Orriginally I was
> going to simply take the 5 individual tubes, put them into a 3" tube (log
> style) with a throttle body on the end and call it good, though I'm a bit
> concerned about the consistency of flow If someone has some better ideas
on
> this I'd love to hear them. Maybe a 5-1 collector with the throttle body
on
> the end of it?