| A
FOREWORD |
STOCK
SETUP |
First off, I am not a professional VW
mechanic, and take no responsibility for
anything that happens to your car as a result
of this modification, this is information use
only, use at your own risk. Below are photos
and descriptions with installation
instructions. Okay, this mod is pretty easy
and cheap for ~5HP (see dyno sheet). All you
really need is a short piece of tube (2 inches
- 5cm) I would use aluminium, stainless steel,
or even plastic for the connection tube (as
long as it can handle engine coolant
temperatures). You don't want to use plain
steel because it will corrode and rust. The
tube needs to fit the factory hoses fairly
tightly and it shouldn't be too thick, as this
will impede coolant flow. Having some little
plastic or rubber caps to cover the inlet and
outlet on the throttle body would probably be
nice too, seems like a good hardware store
would have something like that. I would
recommend wearing eye protection as it is a
good habit to get into while working on cars.
NOTE: Some parts need to be made custom or you
can find pre-manufactured kits on E-bay.
VW TECH BY: John/98GTIVR6 |
Here's the stock set up. One hose running
coolant into the throttle body and one running
it out. See where the two black hoses attach
to the throttle body? One has a grey clamp and
one has a blue clamp? Basically all you are
doing is connecting these two hoses together
so the coolant doesn't pass through the
throttle body, and heat it up. |
| WHERE
TO INSTALL? |
HOSE
CONNECTOR |
Lots of room on the right side of the motor,
so that's where I'm making my connection. |
I made this little part out of aluminium (a
great heat sink) on a manual lathe, to connect
the hoses together. It's basically a fancy
piece of connection tube. I gave it cooling
fins just for fun (Turns out this thing
actually absorbs a good amount of heat, good
for .25HP? Ha ha). I think it bears a striking
resemblance to that thing Ohura wears in her
ear on Star Trek. |
| BLACK
BULLETS/CAPS |
INSTALL
COMPLETE |
I made these black bullets (caps) out of
Delrin, a machinable plastic. They're going to
cover the newly exposed inlet and outlet on
the throttle body. |
So here's what it looks like bypassed. I
bought some red silicon hose just to dress
things up a bit. You can just make out one of
the black bullets (caps) installed on the
throttle body. |
| CLOSE
UP VIEW |
THE
INSTALLATION - STEP 1. |
Here's a better view of the bullets (caps) on
the throttle body. |
Loosen cap on coolant reservoir, to release
any pressure. Place rag underneath the hoses
to catch spilled coolant. Unclamp hoses from
the throttle body. |
| STEP
2. |
STEP
3. |
Slip/slide hoses over the connection tube
until they touch. Replace clamps. Check for
coolant leaks, check coolant level, adjust as
necessary. |
I chose to carefully use compressed air to
blow all remaining coolant out of the throttle
body so it doesn't just sit in there and get
crusty, in case I want to reverse this mod. A
bicycle pump, or a clean piece of tube with
you blowing through it would work too. No
sucking! The taste of VW antifreeze is really
overrated! At this point you can install your
caps on the throttle body and say hello to a
cooler running throttle body. |
| IMPRESSIONS
TO DATE |
Having logged over 1000 miles on the mod I am
happy to report no adverse affects and a small
power gain (5HPmax), the only thing I have
changed is removing the cheap red silicon
hoses (I had leak problems) I installed and
replaced them with higher quality stock hoses
(no leaks now). The power gain is small but it
is an easy, cheap and so far harmless mod
which is easily reversible. In my opinion it
is worth doing. |
