Earl Gillstrom

I am installing an '87 engine in a 86.5 automatic car.
Has anyone documented the electrical differences for this swap? I also have an '87 electrical panel if necessary.

IcemanG17

Earl
928SS had a similar converison to his 85 (but it was a stroker).....he should have some great ideas!!

6.0-928S

The engine Earl is installing is also a stroker. Kinda looks like this..........

Z

Off the top of my head, and engine related only, the '87 has wiring differences for the the intake flappy, knock sensors, and cam hall sensor that the 86.5 car doesn't. The '86.5 has the intake air temperature sensor in the airbox that the '87 doesn't. The '87 has a 60-2 crank position toothed wheel and the '86.5 has a 100-1 toothed wheel, so the appropriate ECU for the wheel that will be on the engine has to be used. The '86.5 EZF gets it's load signal from a manifold vacuum line, and the '87 EZK gets it's load signal from the '87 LH.

I don't know offhand, but the ECU coding plug, MAF CO adjustment wiring, and gas tank venting valve may be different bbetween the two model years as well.

Tony

dont tell me you have $50 86.5 as well!

Earl Gillstrom

Tony,

I am lucky, but not that lucky. This one is actually FREE. It is a long story, but I am installing Hammers engine for him as a trade deal for parts that he gave me last year. Are you still dodgeing Delta bullets?

Earl

Jim bailey - 928 International

If in fact the engine is using aftermarket injection and ignition there is no answer...

6.0-928S

Factory ECU's.

Hammer

928SS

fuel rails, pumps, cooling fan setup, for starters.. also the flywheel depending on which my ecu's you use. newer has flappy, knock sensors which is why I used the later ECU's.

if you take the later ECU's, it's super easy if you use the later harnesses. only the fuel pump wire needs jumping to full time on vs only w/the starter engaged, I think... prolly want to use a sharktuner for that motor

Lizard928

only way to do it is to use the S4 engine wiring harness. I believe that the wiring harness is the same for the ign componants in the engine bay.

Not sure if the 86.5 CE panel is interchangeable with the 87+ panel.

6.0-928S

The ECU's & harness are 1988 w/87 flywheel. I think we're not sure if the 87 fuse panel is necessary. (There is no flappy)

Hammer

Lizard928

As stated by 928SS the fuel pump activation is different between the boards. So you will need to modify the board to be activated by the right wire, or just have the pump come on with the key in the ON(and start) position. though in the event of an accident the fuel pump will not stop running.

928SS

no need to swap boards, iirc. didn't on mine anyway.

everything else just bolts right up/cept for the fuel dampers/rail things.. gotta do some adapting there, but if you made it this far - should be a breeze

also make sure the coding plug is wired right. if no flappy, then the motor will blow up.... just kidding. but it is good for an easy 30ft lbs of extra tq

just noticed - nice damper!! might also think about one of doc brown's pan spacers. after thrashing my old gal at an AX and on some "test sweepers", my Oil pressure never even flickered... kinda neat for peace of mind.

oh, and his magic plenum spacers help a bit too, if he's got any laying around...

very nice looking lump, BTW

6.0-928S

Thanks Rob.
No flappy, I'm using ITB's, hopefully that'll make up for the 30ft lbs I'm losing.
I'm using one of Mike Simard's pan spacers. You can barely make it out in the pics.
Hammer

928SS

sweeeeett!!!