
by Craig and Tim
(Edited
by Howie and EXAClub would like to thank any other contributors to this
very popular article)
For those of you who are not aware of this, the EXA comes equiped with
a rather small and underpowered (in stock form anyway) non-turbo motor.
The most sensible conversion by far is the CA18DET (CA = CA series,
18 = 1.8 Litre, DE = Double Overhead Cams, T = Turbo).
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The
first job was to carefully label and disconnect all the hoses
and wires. This may sound pretty simple, but remember, this includes
things like, The Clutch cable, Power Transistor harnes, Crank
Angle Sensor Wiring and so on.
Next,
we had to check the original CA18DE was fully dis-connected, and
effectively just hanging in there by the engine mounts.
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Then
the idea is to jack the front end right up and lower then engine
down on a couple of trolly jacks, then once you get the car high
enough you can roll the jacks (and CA18DE) forward and clear the
car.
At
this stage we went through a short process of changing various
bits over. For Example, Craig's original car never came with A/C
which ment the Alternator was located down the bottom, so this
was changed (along with the brackets for it). The Starter Motor,
crank angle sensor, Water pump pully, power steering motor were
also changed over.
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The
next problem was that the CA18DET came out of something with an
Automatic on it, which didn't really suit us, so we bolted the gearbox,
clutch plate and flywheel off, and changed them onto the new engine.
Of course we stuck a new clutch in it at the same time.
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After
swappng all the required bits over, and confident the DET was
all ready to go! So we rolled it into place on the trolly jacks
and carefully lowered the car back onto the new engine.
The
extra hands were useful here to guide the engine in, making sure
we didn't dent the radiator. (Making sure
we pulled all the arms out when we were done ;-) )
The
bolt holes for the engine mounts were already on the DET, so we
just unscrewed the original engine mounts off the stock box and
put'em straight on, so there was no problems in using the old
mounts.
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Then
once it was in we had the wonderful job of plugging everything
back in again, working out where things were supposed to go, which
includes all the things in/on the Inlet manifold, such as the
FCID Thingo, was exactly the same size, but had different connectors
on it, and the biggest bugger of all was these little clips on
the Injector loom, one of the guides were slightly ofset, where
as the plugs on the injectors were centered. This required us
to dodgily cut and solder new plugs, however a whole new wiring
loom for the injectors is been custom built from scratch.
After
this some tuning and adjustments were necessary, such as the TPS
(Throttle Position Switch) etc. It was also about this stage we
tried fitting the OEM (original parts) such as the radiator fan's
back in, only to discover that we were somewhat limited by space
(eg. they wouldn't fit!). So
keen as we were to at
least get it started, we focused on other areas, and agreed to
look at the Thermo fans later.
The
basic running of the engine required the quick fabrication of
a new air duct to feed the turbo, We decided a bit of 60mm rubber
pipe and some PVC elbow's would do for a week untill we could
get something properly fabricated.
After
this was in place, it was all action! of course there were a few
things, some dope hooked up the oil pressure sender unit around
the wrong way (such as me!) but that wasn't vital, the engine
ran which was most important.
I also modded the wiring for the oil pressure sender unit to help
it match up. Otherly all stock. The mods to the oil pressure sender
were only minor. The OEM unit has 2 wires coming out of it, into
one of those big brown/grey plastic plugs. The one on the new
engine has one wire into the little spade type plug, so I had
chopped the spade plug off, and put a big chunky plug on it. The
wires mapped up alright as you really need just one wire for it.
If
anyone was wondering the original computer was used. It's running
stock wires and ECU! However a new wiring loom for the fuel injectors
(which runs back to a big 8 pin plug) was required.
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If
your wondering what we did about the Thermo Fans, We kinda got out
of it by getting some aftermarket fans, and bolting them onto the
front side of the radiator. It works, although we may yet add other
fans to the engine bay to aid cooling.
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Question
- Did the CV joints have to be customised?
Well....
No... we didn't, keeping in mind Craig's CVs are STUFFED AS, one
of his boots is completely eaten up, doing the conversion on a
Sat. afternoon tho, we couldn't do much about it, so he will get
the replaced with some re-conditioned units. The big point with
the CV's is, we kept the original 5 Speed gearbox too! The DET
craig got came with an Auto! (stuff that for a joke.. hehe) so
we bolted the auto off, changed the flywheel, put a new clutch
disk and kit in, then bolted the original gearbox onto the DET.
I would want to check that out alot more carefully if I changed
the gearbox too. Using the OEM unit saved any hassles.
Thanks
Tim ;-)
Question - How about the powersteering rack? Line
up okay?
We
didn't touch it.... didn't take it out, or put it in.... just
left it right alone! :)
Question - What have you guys done on the exhaust?
Just hooked her up to the original from turbo?
Well
Craig allready had a 2.5" Muffler, and a special cat, I think
the rest of the piping was stock, but not completely sure, Where
the exhaust comes out of the cat, and straight up the front of
the engine had to be modified, it only cost about $80 or something
tho, I'll take some photos of this next time I see the beast.
Question - Any out of the ordinary
costs/setbacks involved? or was it pretty much straight forward?
(What did this cost roughly? Were the savings from doing it at home
worth it?)
Yeah,
there kinda were, but we expected there to be. The biggest supprise
cost-wise was the radiator fans, we couldn't use the OEM bits
which meant we had to go buy some after market thermo fans which
weren't cheap, I don't know exactly how much, but I'd guess at
about $180. The biggest suprise of all was the Fuel Injector clips
which are different, but I got some from a BOSCH Electrical shop
which re-do alternators and shit, they only cost me $13 ea, but
I didn't mind kicking in a buck to help with the conversion. Total
cost ... craig says it's set him back just under $3000, which
would proberbly be right, but if you knew about it all (as I kinda
do now) and you were a bit of a penny pincher as such, you could
do it cheaper, Eg. craig spend $1700 or something on the Turbo
re-conditioning alone!! ... if you spent $1500 getting a reasonable
engine from a wrecker in the first place, you could get out of
it for $2000 I reckon.... if you went kinda cheapy on it, did
it yourself and all. As to weather it's worth it... well...
how long is a bit of string ?! .... Financially .... If you did
a passable job like craig has doing your clutch and all at the
same time, Yes, if you said it was an $8,000 car, which needed
$1,000 worth of work to keep it going, (totalling a $9,000 bill)
craig has spent the $3000 instead (totalling say $11,000) ....
but he now has a Turbo Exa, which is worth $14k - $15k
(just guessing) ..... so yeah, It is ..... As for the labor,
all about perspective again, if you don't mind rolling your sleeves
up and getting dirty and doing it, then yeah! ... you'll not only
save some cash, but you'll learn alot, and proberly respect your
car a little more afterwards .... If you dont like anything icky,
then you should probably leave it alone!
Question - How long did it take to do the conversion?
how
long, erm roughly 2 days, Sat & Sun.... in hours prolly about
12 Hrs or so. Not as long as you may think! :)
Coooool....
;-)
Heres a link Tim has sent me:
http://www.chariot.net.au/~elroy/index-net.html
Here are dudes churning out 160kw - 170kw from a CA18DET .... can
you imagine a 174kw Exa! ... kinda makes ya think doesn't it.
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