Project Baja Bomber
How to build a 500hp Diesel-Motor
By Robin Stover
Photography: Robin Stover
Auszug aus der August 2005 Ausgabe
Der komplette Artikel liegt den Diesel-Boost Cooler
Systemen bei.
Snow
Performance builds the ultimate add-on for those of you
looking specifically at quarter mile times.
The technology has been around for years - drag
racers swear by it. It wasn't readily available,
however, until Matt, the owner of Snow Performance,
developed a bolt-on kit for diesel. It's called
water-methanol injection. We tried it out and were very
impressed with the results. We're talking 50 to 95
rear-wheel hp, depending on the ratio of water to
methanol. It works like this: a simple bulkhead fitting
goes in the bottom of the windshield washer fluid
reservoir. From there, a special pump forces the
water/methanol mixture into the intake plenum. Two small
atomizer nozzles fog in the juice as the turbo boost
level comes up. The electronic controller meters the
amount of water/meth injected proportionally to boost
levels. Cooler EGTs are an added benefit with this
system. The kit retails right around EUR500.
The secondary turbo was then fitted to the exhaust
manifold. This was followed by hooking up the oil feed line
and drain to the appropriate ports. Then the primary turbo
support bracket was installed just behind and slightly lower
than the secondary turbo. This impressive bracket is
brake-formed from 316 stainless steel.
Are Twins Too Much?
Not all Cummins owners actually need two turbos underfoot.
At least they don't think they do. For those people, we
suggest driving a truck equipped with twins first - you’ll
know right away if it's the right thing to do. We did. For
others, though, the twin system might be a wee bit expensive
to justify. Luckily, BD has solutions for tight pockets too.
This one is called the Super B single replacement turbo and
it retails for about half the price of twins. With this kit
you get a 75- to 125hp increase with acceptable EGT levels,
and the best part comes later down the road; if you decide
to upgrade to BD's twin kit, you already have half the
system installed.
Turbo Timer
Did you know each time a turbodiesel is shut off, turbo
bearing damage can occur? It's true - when a hot diesel
engine is turned off without a proper cool-down period, the
bearings that are cooled by engine oil get a boiling-hot oil
bath, which leads to premature bearing failure. One way to
avoid this expensive mishap is to install one of BD's turbo
cool-down timers. This little unit is wired-in under the
dash to provide logic that delays engine shutdown until the
turbo has reached suitable temperatures. It takes some
getting used to because you have to remind yourself when you
remove the key from the ignition that it's "OK, the truck
will turn off when it's good and ready." A simple tap on the
brake pedal will override the turbo timer, killing the
engine instantly should the need arise.
DYNO
TEST COMPARISON with
BOOST COOLER WATERINJECTION
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