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MPI has the worlds only high performance custom tuning
available for Polaris ATVs and UTVs. We took our 20+ years of electronics
knowledge and engineered an improved program for all Polaris units. Due to the
high cost of the base ECU, we offer a programming service to update your factory
box.
MPI also offers an enhanced "Piggy-back" fuel
tuning module which we typically use in a boosted application such as
Supercharging. Piggy-back controllers offer easy user fine tuning and make a lot
of sense to customize your fuel curve.
The only way, however, to alter ignition timing and
rev limiters is to replace the factory ECU or reprogram it. It has not been
common place to replace the entire fuel injection / timing control on a vehicle
due to cost and the integrated nature of the factory module.
This leaves only one viable option for
ignition; Let MPI reprogram your unit.
Our standard tune up includes increasing the rev
limiter to 7000 rpm (stock RZR 6500, stock Ranger 6100 high gear, 5900
low/neutral). We optimized the fuel & ignition curves to remove torque limiting
and drivability glitches. These improvements are part throttle drivability gains
that are noticed at less than full throttle. The base MPI programs have also
changed the fuel curve to to give you an efficient 13.2:1 Air
Fuel Ratio. We found the factory programming to be a bit fat on the top end on
most models. These corrections are obvious with an air fuel gauge, but you are
unlikely to see much advantage in out and out performance on stock RZR units. We
see definite gains on many Sportsman models and Ranger models. Please consult
your dealer for your expected performance improvements.
Our private label series is what most customers
should be looking for if their unit is modified. We allow a reseller to develop
a group of improvements such as clutching, exhaust and intake modifications and
couple these mods with proper tuning to produce a huge improvement in
performance. A package that without proper ECM tuning would be almost worthless.
The results on the RZR with added horsepower
potential like compression or a super or turbo charger are simply amazing. There is
no doubt in your mind that MPI did its homework the minute you plug in your new
box. You will experience better acceleration and a higher top speed. Gains that
could not be realized without corrected tuning.
The base MPI program does NOT have aggressive
timing, nor does it have radical fuel changes. The largest changes in the basic
MPI program is the Rev limit change. If your unit is not capable of hitting the
rev limiter now, you will not expect to experience much gain with the base MPI
reprogram.
Many of our Private label customers have optimized
their programs to work with specific options and have tunes that will work well
and show improvements on basically stock units to full mod units. Please see our
private label resellers for more aggressive and customized tuning options.
We have dealt with a few inexperienced and
very misinformed customers that made some basic mistakes, we
hope that sharing these mistakes will help future customers. Here are a
few examples:
1. Customer installs larger than stock tires and
expects to not experience a performance loss. IT IS NOT POSSIBLE TO INCREASE
TIRE SIZE AND WEIGHT ON A STOCK UNIT AND NOT SUFFER A LOSS IN PERFORMANCE
2. Customer purchases an ECU modification from
MPI or a Custom Program from one of MPI's private label resellers and couples
this ECU with other vehicle changes that have not been accounted for in the
program. IT IS NOT POSSIBLE TO PURCHASE GENERIC HIGH PERFORMANCE TUNING THAT
WILL WORK WITH ANY TYPE OF MODIFICATION.
3. Customer has made clutch modifications that
appeared to not hurt (but definitely did not help) the unit. No the customer
adds our ECU mod and does not get the expected results. AGAIN, EVERYTHING
EFFECTS EVERYTHING ESPECIALLY IN A FUEL INJECTED CVT CLUTCH TYPE UNIT. IF THE
PROGRAMMING IS FOR A STOCK UNIT, PLEASE USE IT ON A STOCK UNIT.
4. We have found that a stock RZR at Sea Level
WILL HIT the rev limiter. However, many companies are selling modifications that
actually hurt the performance and once these mods are installed the factory RZR
will not go as fast. IF YOUR UNIT IS NOT HITTING THE REV LIMITER, raising the
REV LIMIT WILL NOT HELP YOU. GO BACK 1st AND FIX WHAT WAS BROKEN (returning to
stock often helps).
5. We are not special, if our stock units hit the
rev limiter, why doesn't yours???
Custom programming is available.
Features:
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7000 rpm Rev limit.
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No
Speed limiter in Forward or REVERSE.
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Programmed in house at MPI.
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Optimized
timing curve.
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Optimized
fuel curve.
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Faster
acceleration and top speed on unmodified units.
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Includes a
custom billet cover / heat sink.
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Unit
works perfectly on Stock motors as well as Supercharged ones.
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