Z18 ET

[flinterman2000]

Does the ECU for the Z engine control fuel only? If so, would it need attention if I grind the cam to 264 duration. What new model air flow meter is compatible with this engine - SR, RB, QG etc? Its fitted in a 85 720 with a dogleg manual transmission from an A10 cifero (not 100 percent sure though).

[Seishuku]

It's fuel and spark, unless the distributor has the vacuum advance can on it.
And yea, you would need to do a lot of work to the fuel to run that big of a cam.

Most of the older turbo engines had a hotwire MAF instead of a flap type meter, but no one has ever mapped out the ROM on those ECUs, so I really doubt you would ever be able to use a larger mass flow meter on it.

Your best bet would be to go to a standalone system, like MegaSquirt.

The stock management on those engines just isn't very tunable, though you could very well use a stock system off another engine, like a KA or SR. It would take some work, but it is doable.

[flinterman2000]

Thanks Seishuku. Will check my options.

[flinterman2000]

Can anyone say where the vacuum for the dizzy connects?

Here on No. 1



Or here on the plenum



Any help will be appreciated.

[Seishuku]

#1 is a thermal valve, probably for EGR or AIV, so it's most likely a direct plenum source.

[flinterman2000]

Thanks again seishuku.