ok. an update on the white car... it was wrecked right after changing the wheels and tires on it. all of the time and effort down the drain it seemed until craigs list came through once again with a 1985 gti that most definitely needed to head to the wrecking yard. swapped out the whole interior, engine, transmission, suspension, wheels and tires and it runs and drives like it should. not being able to leave well enough alone i decided to convert it to the megasquirt stand alone engine management system for 2 reasons...
- just to see if i could
- practice in setting it up and getting something running so when i put megasquirt into my trekker it will be MUCH easier getting it going then trying to figure it out on something that has never run before.
here is the readers digest version of what it took to get it converted from the bosch cis-e injection...
setup i have planned... wasted spark, crank trigger, G60 injectors, wide band o2 sensor.
i want to bring the engine management into this decade at least
i started with an automatic passat throttle body, but it will not clear the fuel rail. if the tps was mounted on top of the throttle body, it would work nicely. i know and i have read that you do not really need the tps for megasquirt, but i figured it can not hurt. so i made an adapter plate for the 70mm mustang throttle body just like here:
forums.vwvortex.com/zer...92520started with this from onlinemetals.com
1" thick aluminum stock
drilled holes to mount to the intake
drilled and threaded mustang throttle body holes
removing material...
decent clearance...
installed on "dummy" engine after taking to the machine shop to flatten both sides of it
the collection of parts needed for the conversion:
collected parts so far...
throttle body, tps and pigtail
temp sensor and cold start valve block off plate
1/4" to 5/16" fittings and hose and fittings to hook to factory supply and return lines
digi fuel rail (with junk injectors for fitting purposes)
MS wiring harness from DIYautotune.com
communication to the MS box
injector pigtails
air sensor with pigtail
one steel and one aluminum bung for putting the air sensor in
wide band o2 sensor
with gauge
jimstim so i can figure some things out before i try to tune
wiring, fuses and relays for power and protection
coil for wasted spark (still waiting on the pigtail for this from napa)
got the MS box from spitfireefi.com...
also received the pigtail for the coil pack as well...
and the it seems to "run" the jimstim just fine too
tach driver...
got the IAT sensor collar welded to the aluminum air tube the cone filter will go on.
crank shaft trigger...
picture of the relocated coil...
CTS relocated to the factory position (drilled out and re-threaded)
common ground for the megasquirt box AND the wideband o2 sensor is a MUST!!
final installation picture...
getting it all running correctly on the local dyno
final impressions...
my GOSH! why didnt i do this sooner??!! the throttle response is incredible. starts, idles and runs smooth on even the coldest of mornings. (single digits even here in texas this year!) idle is controlled by the computer instead of vacuum. and still gets low 30's mpg going to and from work.
ok, back to the trekker