07-26-2008, 12:50 AM
I have always upgraded Bosch systems with aftermarket ignition multispark generators. My only choice has only been Crane. Never had a problem and the install is really straight forward. Why do this? Well, I have run turbos before and extra spark energy is very beneficial. Also, at lower rpms (less than 3000), you get multi spark which is often more efficient in forming the flame front. Also, you get a sequential rev limiter (stagers the spark cut so it's not too violent)
So I decided to do this on the 968. Basically, you interrupt the two wires going to the coil. Black is 12v power and green is ignition/ ECU. In between goes the crane unit. Then from the crane unit back to the coil. Also, you have to wire a single blue lead to 12v switched power (i used the black coil power line) so that the unit knows it's a 4 banger. Then you wire up 12 battery direct line and ground. As a big PLUS, the ground lead is just long enough to reach the OE ground bolt located right below the power steering lines. Also a PLUS, the crane unit tucks in nicely right behind the right headlamp sheetmetal (see pics). There are already two holes in the sheetmetal (1992 edition) which nearly perfectly fit the crane unit.
Additionally, I added some rubber shock insulation made from old 968 trunk seal. Held the bottom piece in place with 3 zip ties. top piece shorter so that the two mount screws can pass through the unit. Don't need sip ties for the top piece. You have to remove the headlight unit to get enough room to fit your hand in to tighten the two 1 inch long mounting bolts(not included in kit). The Crane kit is excellent with ALL necessary plugs. You will need heavy gauge extension to the battery. Only 7 wires to hook up.
So I hooked it up, turned the key, and she fired right up. Instantly, you can smell ozone? charged exhaust. But no more faint fuel smell in the exhaust. Tach worked fine. engine revs easily. Finished at midnight so will test tomorrow on the road. No dyno nearby so no real figures to tell you guys.
You will have to pardon the sloppy primer spray. Whole car to get repainted next year or so.
Anyway, easy and fun to do. Cost: 225$ Model: 6000-6440
There are three 5mm allen head screws which hold the alloy headlight frame to the metal arms of the headlight mechanism. It is very easy to remove these and take out the headlight frame rather than the headlight itself. don't need to undo any wiring. Also, I have concerns about heat, so I might make a heatshield. There are two cooling ducts right in front of the Crane unit, so I'm not too concerned...yet. The shock mount elevate the unit off the sheetmetal so that cooling air passes underneath and aorund it.
Pics:
looking into passenger side headlight opening/// the rubber shock isolator/// finished mount
So I decided to do this on the 968. Basically, you interrupt the two wires going to the coil. Black is 12v power and green is ignition/ ECU. In between goes the crane unit. Then from the crane unit back to the coil. Also, you have to wire a single blue lead to 12v switched power (i used the black coil power line) so that the unit knows it's a 4 banger. Then you wire up 12 battery direct line and ground. As a big PLUS, the ground lead is just long enough to reach the OE ground bolt located right below the power steering lines. Also a PLUS, the crane unit tucks in nicely right behind the right headlamp sheetmetal (see pics). There are already two holes in the sheetmetal (1992 edition) which nearly perfectly fit the crane unit.
Additionally, I added some rubber shock insulation made from old 968 trunk seal. Held the bottom piece in place with 3 zip ties. top piece shorter so that the two mount screws can pass through the unit. Don't need sip ties for the top piece. You have to remove the headlight unit to get enough room to fit your hand in to tighten the two 1 inch long mounting bolts(not included in kit). The Crane kit is excellent with ALL necessary plugs. You will need heavy gauge extension to the battery. Only 7 wires to hook up.
So I hooked it up, turned the key, and she fired right up. Instantly, you can smell ozone? charged exhaust. But no more faint fuel smell in the exhaust. Tach worked fine. engine revs easily. Finished at midnight so will test tomorrow on the road. No dyno nearby so no real figures to tell you guys.
You will have to pardon the sloppy primer spray. Whole car to get repainted next year or so.
Anyway, easy and fun to do. Cost: 225$ Model: 6000-6440
There are three 5mm allen head screws which hold the alloy headlight frame to the metal arms of the headlight mechanism. It is very easy to remove these and take out the headlight frame rather than the headlight itself. don't need to undo any wiring. Also, I have concerns about heat, so I might make a heatshield. There are two cooling ducts right in front of the Crane unit, so I'm not too concerned...yet. The shock mount elevate the unit off the sheetmetal so that cooling air passes underneath and aorund it.
Pics:
looking into passenger side headlight opening/// the rubber shock isolator/// finished mount
(This post was last modified: 10-18-2008, 08:48 AM by xrad.)
