Re: EZK and APC - Saab Performance Bulletin Board - Saabnet.com
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Re: EZK and APC
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Posted by 85turbosled [Email] (more from 85turbosled) on Mon, 5 Sep 2011 01:08:50 Share Post by Email
In Reply to: EZK and APC, Judge Edo, Fri, 2 Sep 2011 09:13:42
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I have just completed installing a Volvo EZ117K system in my car (amongst MANY other modifications). I chose to use this unit, as since it was fitted to a turbo car will have a ignition retard curve instead of an advance curve as seen in the N/A cars units. Also using the Volvo EZK system will give better 'on boost' performance, as it advances the timing a few degrees as the RPMs climb higher in the rev range, whereas the factory ignition system simply retards to 10°.

If you are using a Turbo-16 ECU, you MUST get an ECU from either a N/A Saab OR a LH2.2 Volvo. The OE turbo ECU does not internally have the hardware to compute the 'LOAD' or Tq signal which is needed for the EZK to function properly. Then you must either swap the EPROM from your current ECU into the donor ECU, or re-map the N/A unit.

Installing this unit is a somewhat involved undertaking, as you will have to re-wire the hall effect sensor, get a different ignition amplifier and then re-wire it. then you will have to create a new harness for the EZK, and find somewhere to install it. You also need to run wires linking the EZK to the LH ECU, so they can properly function together (TPS, Load, tach output). I stacked the EZK's knock sensor on top of the existing APC knock sensor, and used a longer bolt.

there are also some other issues I need to work out (which are harder to explain)...ECU load points and such, and ultimately any standalone WILL be MUCH better than messing with this old stuff. I am doing this strictly because I have the necessary tools and equipment to re-map, and tune cars.

all that aside. Running factory boost levels, N/A intake cam, 2.5" exhaust, 3" downpipe, 3 bar FPR, and FMIC, the car spins 16x7's in second to redline instantly using the EZK/APC setup. If you also set things up properly you will not have the classic 'APC fighting the EZK' which many people complain of. Its fantastic...off of boost the engine feels like my N/A 9000 did, very responsive, and much torque.





posted by 70.70.9...


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