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Re: '85 Coupe GT engine swap
In a message dated 9/23/99 7:42:01 PM Eastern Daylight Time,
<< Has anyone put a NG code engine (from a late '87 model, 130 hp, CIS-III)
an earlier model? What is required in terms of modifications to wiring
harness and ECU because of the knock-sensing ignition? All parts are
available at reasonable cost from a local salvage yard. Considering rear
disc brake conversion as well. Input?
I had considered than in my GT when I had it see
web.csuchico.edu/~javad to see the car. To do it right, you would swap the
associated electronics over including the knock sensing ignition. Maybe some
listers have some experience with swapping over only the knock sensor? An
easier way to do it would be to swap the lower end of the NG motor, and
minimally run only high octane gas in it (10:1 is high, but VW guys run it
all the time in old A1 GTI witout too much trouble). You could also add a
J&S knock sensor to ensure knocking is not a problem.
IMO, if I were to do the work to swap all the wiring and ECU for about 15
hp, it is not worth it- an MC is going in for that much work. If more power
is what your looking after, look to a turbo conversion. The NG is not going
to make the car much faster,
with an MC you are looking at 220 hp potentially, vs 130.
As for the brake conversion, see the web site...good luck!