Re: Why would you have to MOD your CIS ?

[Orin Eman <orin@wolfenet.com>]

> In message <006601bf02c6$c7666560$01181ba1@olsy.dk> thyrsted2@olsy.dk (Kenn Thyrsted) writes:

> > Seemes to me that you don't have to mod the CIS for running higher boost..

> > If that's true, - then why do you have to mod the CIS if you're increasing
> > volume, eg by using a 2.5l crank etc..

> Because it seems (certainly from my experiments) that the mechanical air
> mass sensor used in Hitachi-controlled I5 engines maxes out at 4500rpm
> and full boost.  At this point, the system is running open-loop and

...and the knock LED says that the MC tends to start knocking
around 4800 RPM when above stock boost.  The knock sensor catches it
and retards the timing, but perhaps more fuel is in order rather than
lots (and I mean LOTS) of timing retard.

Phil, does your type 44 have the MAC14?

Orin.