Saab APC + turbo I5 ?s

[Michael Gough]

Hey Marc,
I'm going to do it when I put my new motor in. One trick is to not connect
the RPM signal at all! This will also give you faster spool-up, because the
Saab system sort of brings the boost on gently. If you disconnect the RPM
sensor it'll simply give you full boost based on knock and the pressure
transducer. You can adjust full boost level up to about 17psi using the POTs
in the computer. Past this point, you simply hook up a bleeder line to the
pressure transducer and make the box think boost is lower than actual. And
wile you're doing all of this, it'll still pull the boost down if it hears
knock! Pretty cool system in my eyes. I was using just the light with the JT
turbo motor, but I'm going to use the whole system on my new MC motor.
Mike

> I was looking at using an APC box as a way to implement a knock light on
> my 4ktq.  Jim, I know you've done this but in looking at the specs for
> the system i was curious if anyone has tried hooking up the boost
> control portion of the system to an I5?  Obviously the tach input would
> be wrong but the worst that would happen would be for it to limit boost
> too much.  I was just curious if someone had hooked it up what the boost
> behavior was like...
>
> I've also read that the boost limits can be adjusted by a couple of
> trimpots on the circuit board so it could be tweakable....
>
>
>
> Thanks
>
>
>
> --
> ----------------------------------
> Marc Swanson, Software Engineer
> Sonitrol Communications Corp.
> Hartford, CT
>
> Email: mswanson at sonitrol.net
> Phone: (860) 616-7036
> Pager: (860) 948-6713
>  Cell: (603) 512-1267
>   Fax: (860) 616-7589
> ----------------------------------
>