-
Q
- Are Superchargers and Turbochargers equal in efficiency?
A.- Yes, for all practical applications. For
out and out maximum horsepower a Turbo may be capable of making about 10% more
power. Over 400HP has been demonstrated on the RX-1 & Apex with a Racing
Supercharger, there is clearly no power advantage for the consumer desiring 200 to
300HP on the Yamaha 4 stroke (not to mention the unmatched response of the
supercharger).
-
Q
- Does a Supercharger Have Lag?
A - NO! None what so ever. Turbos have Lag, because it takes time for the
exhaust to spool up the turbo. A Supercharge, being driven directly by the
Motor, has Zero lag time. In fact, a Supercharger has anti-lag. It is many
times MORE responsive than any normally aspirated sled. When you are asked
to think of the most powerful internal combustion engine you can, a Top Fuel
Dragster should pop into your mind. They produce over 8000HP. They also run
blowers...all of them. This instantaneous response can be a significant
advantage for someone that is on and off the throttle, which is typical of
Mountain riding.
-
Q
- Do I have to hack holes in my sled to install a MPI blower?
A - NO! There are no holes added with the exception of two 3/16"
rivet holes on the RX-1/Apex. Nothing so much as a bolt hole is added. Everything mounts in
stock holes!
-
Q
- Can a novice install this kit?
A - Yes! Although this is a fairly complex product, installation is a
snap. If you can install a set of pipes, you can install our blower kit.
Typical install times are about 4 hours. Everything happens under the hood.
You DO NOT remove the seat or tank!
-
Q
- Will I have problems jetting and clutching this kit?
A - NO! Since the boost is instantaneous, there is nothing funny
going on with the fuel. We simply add a metered increase in fuel delivery as
a direct relation to the boost. There is actually less variation in the
air/fuel ratio than a stock sled.
-
Q
- What clutching changes do I have to make?
A - Relax the secondary spring's preload 10 degrees from where you
are now. Use the stock 8FA weight with two 4.5 gram rivets in them and
change the rollers from 16.5mm to 14.5mm. This is our setup for 6500 to
10,000 feet. There are additional products available that will help even
more, but with this kind of HP and throttle response clutching gets easier,
not harder. Just throw a lot of weight at it.
-
Q
- My state has laws against modifying the exhaust system. Will this kit effect the
noise level of the sled?
A - NO! There is absolutely no modification required to the stock
exhaust. All advertised performance numbers are through the stock exhaust.
On back to back dyno runs with open exhaust and stock exhaust the sled produced
exactly 231HP on both runs. Aftermarket exhaust is OK if you want to loose
more weight, but be careful, some of the products out there don't work as
well as the stock system; you could actually loose some power.
-
Q
- What kind of durability does the supercharger itself have?
A - MPI is on its 5th season now and we have enjoyed less than a 2%
failure rate (with the exception of a manufacturing problem in year 1, which
was 100% factory warranted). It has an even a longer history on motorcycles and
automobiles. This unit actually packs a warranty that is not
voided with off-road use. Off-road applications have a 1 year warranty
(with limited coverage for 2 years)
-
Q
- How can this kit produce equal or greater horse power than turbo kits on
the market?
A - Simple, contrary to popular belief, turbos are NOT free
horsepower. If you don't believe this, just take off your turbo's airbox and
setup the carbs stock and go ride the sled with the turbo still in the
exhaust pipe. We have dyno tested this exact scenario for both turbos and
blowers. Some extremely well engineered Turbos kits take slightly less power to drive than
OUR supercharger, but even in this case there is less
than 12HP difference on a 250HP application. It is not our intent to bag on turbos, in fact
we sell them! There is a lot more to a forced air system efficiency than the
air compressor itself. Compressor sizing (and turbo sizing) play a big role.
On a turbo, exhaust design is key. Just how much you compromise it to fit
all this stuff in a sled is the measure of the engineering quality.
-
Q
- Do I have to run 100% Race Fuel?
A - NO! 50/50 is perfectly acceptable. We look at it
this way. 110 octane race gas is about $4 / gallon and Pump premium is about
$2 / gallon. If you mix 50/50 it costs $30 for a 10 gallon fill-up. If you
use 100% race gas it costs about $40 for a fill-up. With this type of high
performance investment the
extra 10 bucks is well worth it! On the technical side of things: when you mix 90 octane pump gas with 110 octane race gas 50/50
you get about a 95 octane mix. Pump gas KILLS race gas!
