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Installation
date: 5/16/00
This
was probably one of the easiest and quickest installs I've done. The
kit is very simple and takes about 15-20 minutes to install. The only
tools you'll need are a 10mm socket wrench and an extension (I'd also
recommend a can of carb cleaner and an old toothbrush). The spacer
only works on the H.O. (High Output) version of the 4.0L, though,
so if you've got a 2.5L or the older 4.0L, you're out of luck, sorry.
Poweraid
claims their spacers provide "tremendous torque and mileage
increases", and while the spacer did seem to increase
power with my 33's and stock gears, I wouldn't call it a "tremendous"
increase. I can't tell yet what kind of mileage gains I'll
get, if any. I have talked with other Jeepers with the spacer
and they all said it made a noticeable increase in power,
but no one mentioned mileage gains. One Jeeper was able to
dyno his Grand Cherokee (ZJ) with the kit and said he got
a 6hp gain from the spacer.
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The first
thing to do is remove the plastic intake tube from the throttle
body. Now is when that carb cleaner and toothbrush come in handy.
If you haven't cleaned your TB in a while, it's probably dirty.
Use the cleaner and brush to give the inside of the TB a good
cleaning, don't forget to clean both sides of the butterfly
valve (are they still called butterfly valves?). Next, remove
the 4 bolts that secure the TB and remove the old gasket. Give
the top of the intake manifold and bottom of the TB a shot of
carb cleaner to clean the mounting surfaces.
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Now insert
the spacer between the TB and the intake manifold, making sure
to put a new gasket on either side of the spacer. Use the supplied
longer bolts to bolt the TB back down. A little more than finger
tight is all the bolts need to be torqued to.
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Next step
is to insert the 3 spacers under the TB linkage bracket. I've
circled the 3 bolts you'll need to remove to do this. You don't
need to adjust any of the cables.
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This is
what it'll look like once you get all the spacers in. I'd recommend
putting all the bolts in barely finger tight at first, so you've
got a bit of room to make sure you get all the holes/bolts lined
up right. Once you get all the bolts in, torque them down to
about the same as the TB bolts: just a little more than finger
tight. You'll be able to feel/tell how much torque is enough.
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Here's
a close-up of one of the spacers under the TB linkage bracket.
Once you get all the spacers installed and bolted down, reinstall
the plastic intake tube and then check the linkages for any
clearance problems at open and closed positions. Shut the hood
and you're ready to go.
note:
My TB spacer whistled very badly at certain rpms after I first
installed it. Through a little trial-and-error I ended up rotating
the spacer 90* from where I'd originally had it and also flipped
it upside down. The whistle is now completely gone.
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You can order
the spacer direct from Poweraid, but you can also order it online
from Macromotive.com and save about $20. Total price at Macromotive.com
is about $75, including shipping.
For
more information, contact:
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