[urq] What cause overboost ?

[martin at quattro.ca]

Ben,

Alex Stickler did the research and found the difference.
I know others have mentioned difference as well.
Did both of the ECUs have the same P/N?

I bought a unit way back from Orin Eman, those were the crude home made
units, but worked very well for testing etc.

I know Canadian Tire has a universal unit for about $60 CDN.
Or you can get a nice Autometer for $80 or so.
That is a very usefull tool, as well as a duty cycle meter, again I got
one way back from Orin.  But a good Automotive multimeter should have that
function.  You can see from the readings exactly what the engine and ECU
are doing.  High duty will mean ECU is trying to richen the mixture and O2
readin will verify that.
The gauges have warned me many times of vacuum or boost leaks before the
problem grew to a drivability problem.

Hope this helps.
Martin

> Martin,
>
>
>
> I have both yello and blue tagged ECU's and they interchange without doing
> anything to the pinout.  What rewiring supposedly needs to be done?
>
>
>
> Also,  What would you recommend as an inexpensive A/F meter?  Perhaps I
> could put a few together - I believe there was a DIY one too, but wouldn't
> mind paying $20-30 for a decent cheap meter.
>
>
>
> My solid lifter head for WX from '83 UrQ is 035 103 373G and the similar
> head from CGT is 035 103 373G does not have sodium filled exhaust valves.
> Neither have the boss.  I'm curious what engine that is for.
>
>
>
> Ben
>
> benswann at comcast.net
>
> [Date: Tue, 7 Mar 2006 15:38:37 -0500 (EST)
>
> From: martin at quattro.ca
>
> Subject: Re: [urq] What cause overboost ?
>
> To: "Louis-Alain Richard" <laraa at sympatico.ca>
>
> Cc: urq at audifans.com
>
> Message-ID: <2950.66.163.19.99.1141763917.squirrel at wm1>
>
> Content-Type: text/plain;charset=iso-8859-1
>
>
>
> Louis-Alain,
>
>
>
> Early '83s had a different pinout on the ECU (yellow vs blue lable).
>
>
>
> THis might cause some problems as well.  Use matching ECU or rewire the
> plug.
>
>
>
> YOu can see the valves throuhg the oil fill cap.  It's clear if they are
> solid or hydraulic.
>
>
>
> YOu need to have a Air/Fuel gauge, I keep telling people that this is very
> important tool for turbo engines.  I had one fuel distributor running out
> of
> fuel at 7psi, wouldn't have known that without the gauge.
>
>
>
> Hope this helps.
>
> Martin]
>
>