Racecomp Engineering Tarmac 2 Coilovers
by SubyFi (2/19/07)
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4I was in the market for a coilover system for
my 2005 Subaru STi. I did not want a JDM brand due to the stiffness
overkill for the crappy roads in Los Angeles. I heard great reviews of
the KW variant 3 coilovers from many STI owners so I figured I could not
go wrong with getting those. But as I was about to drop my hard earned
cash on them, Racecomp Engineering (RCE) announced their coilover made
by KW to their specifications.
The features of the Tarmac 2:
- 2-way design with separate compression and rebound adjustments.
- choice of 3 different linear spring rate kits: 500 lbs/400 lbs(9kg/7kg), 400
lbs/350 lbs
(7kg/6kg), and 350 lbs/300 lbs (6kg/5kg).
spring rate
conversion
- stainless steel corrosion resistant coating.
- double locking perches.
- unique paint scheme.
- limited lifetime warranty through KW.
- USA based technical support.
- wide range of spring rates supported without a revalve.
I placed my pre-purchase order with RCE in December 2006 for the 350 lbs/300
lbs (6kg/5kg)
rates. I chose the 350/300 rates because my car is my main
transportation to work. It is a track car secondary. I also live in Los
Angeles where the roads are poorly maintained and constructed (the 405
washboard).
Delivery - Thursday
Finally in February 2007, they arrived.

I had some issues with the packaging. When I picked it up from my
mailroom, the entire box was taped up with "Inspected by DHL"
tape.
There was a hole in the box where the front coilover lower attachment
point was. I can only think that DHL opened the box to inspect the
coilovers for damage and then taped it back up.
The piggy back reservoirs for the front struts had no protection from
the sides of the box. If the box was dropped on its side, damage may of
occurred. I inspected the coilover and there were no bends or cracks so
I was satisfied at the moment. I was actually surprised that the
coilovers were not damaged in some way due to the lack of protection.

Installation - Saturday
The instructions that were included stressed that the coilovers be
installed by a professional. Sounds primarily like a disclaimer. If you
have a copy of the service manual for your car and have the tools (and
know how to use them), the installation should go smoothly.

There is a lot of droop to these coilovers compared to
JDM models.
The Tarmac 2 uses linear springs in the rear and therefore required
modified Group N mounts. RCE sells these mounts along with their own
rear pillowball mount. The Tarmac 2 may work with other brands of camber
plates but you may have to check with RCE first. Since I already had
Group N mounts, I opted to modify them so they work with the Tarmac 2's.
The PDF they sent me on how to do it looked easy enough. I purchased a
4" electric grinder with cutting wheels. My first attempt was pretty
sloppy and did not look as clean as the instructions they sent. On the
second mount, I cut slots (with the cutting wheel) into the part that
needed to be removed and took pliers to fatigue it (work it back and
forth) to break free. I did this all around. This looked better than my
first mount. I sprayed both of them with black spray paint to cover the
raw metal exposed after removing the part.
I reused my PDE adjustable camber plates for the front. I could not use
the supplied nylock nut and washer due to the design of the pillowball
in the camber plate. There was enough threads on the coilover for the
PDE nut to screw on without any problems.
Height adjustments were easy by moving the lower perches. They were
made of some kind of plastic and thought they were metal. The set screws
on the lower perches were sometimes a pain to access with the allen
wrench if the screw was located behind the coilover. The front passenger
coilover lower mount hole for the camber bolt was opposite from the
stock struts, from the front towards the rear, with the nut on the rear
side. This is just a minor detail since camber is still adjustable. The
rear struts have the top hole slotted in the lower mounting point. This
is to provide rear camber adjustment. I had a Ingalls camber bolt on my
stock strut and it had a lot of play when I used it with the Tarmac 2. I
wish I had my stock bolts still. After a
basic wheel
alignment on Sunday, I was ready for a test drive. continue to
Test Drive |