What are the good and bad points in these two controllers? Which is the better to go with? Which is the biggest bang for the BIG buck? Any input on this subject would, once again, be greatly appreciated.
If you have zero mods start with the XP curve that is loaded on the power commander and adjust from there. I would run the same section of road over and over with different settings. Take someone with you that can operate the laptop computer and watch the GPS for speeds at specific points along your route for each run. It takes some time but well worth it when you get it right.
I started with the power commander SP with exhaust and intake mods MAP. I adjusted from there. I have the SP mudbuster cam, SP ECU, timing key, throttle mod, 58g clutch weights, white spring, intake mod, exhaust mod and the power commander.
Coming from the sport quad world guys and gals I can tell you the Power Commander is heads and shoulders above the Dobeck. I've seen so many individuals who purchased the Dobeck and then later on sell them to upgrade to the Power Commander. Now the great thing is that if you are looking for total performance the Power Commander can be hooked up to a DynoJet Dyno and tuned in either 1 or two pulls automatically if the dyno has the proper setup and software. This is usually accomplished within an hour including hookup time.
I know for the RZR I'm waiting for the Power Commander.
Another option if you do not have a dyno is to find a way to monitor the Air Fuel Ratio. For my LTR450 I installed a bung in the exhaust pipe so I could screw in a Bosch 5 band oxygen sensor and hooked it to an Innovate LM1. With that I could record the AFR at any given RPM. For performance there are different schools of thought but somewhere between 13.2:1 to 14.5:1 is where we normally tune them for a sport quad.
Don't get me wrong. If you want to tune it to where it runs better with the Dobeck you can as long as you know what you are doing. If you want to do it right the Power Commander is the way to go and then have it tuned on a Dynojet Dyno and yes more adjustment points is definitely better.
Unfortunately the closest Dynojet that is capable of doing that for me is outside of Savannah Ga, and I'm in NC. It will be worth the drive though. Heck I'll just make a few days out of it and do some riding while I'm down there.
Which of the two devices would you guys suggest if I want to keep the engine, intake and exhaust completely stock? I believe there is plenty of room to improve the stock set up... they really de-tune these things from the factory, like most vehicles.
Do you think simply buying the SP ECU is good enough? What would you do to a stock machine?
I prefer the Power Commander due to the fact it has more adjustment points which means you can dial it in for better performance.
The other thing about the Power Commander is that you can tune it with your laptop or if you have a long enough cord you can run it from your desktop out your window to your Ranger and tune it that way.
For the 05 or 06's the with a stock setup the SP ECU is all it can use. They really shine when you start adding motor mods. The power commander is probably a better unit if you can understand how to tune a motor. For the 07's I would probably go with the powercommander.
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