[Tec] what actually does p.c.u do

[murhf3]

What are the main things a p.c.u does, are we being sold an extra we don.t need, are they a risk to your bike,and why did I HAVE to get one when I bought new pipes?

[TwoSeven]

Could you tell us what p.c.u. means. So far I'm guessing its not Police credit union - nor the computer shop in christchurch

[murhf3]

Could you tell us what p.c.u. means. So far I'm guessing its not Police credit union - nor the computer shop in christchurch

Power command unit,like the ecu,s on cars.Little computers that adjust your performance on a dyno.

[murhf3]

Could you tell us what p.c.u. means. So far I'm guessing its not Police credit union - nor the computer shop in christchurch

They cost around 500-650$

[sAsLEX]

you dont NEED one when you change pipes, but you never needed to change jets on carbs when you did it back in the day either but you do to make your bike run better.

The stock ecu will be designed with the stock parts and emission controls in mind, so your bike will run nice and clean with the stock bits. When you change pipes your bike need different fueling to suit these and this is what a pcu does.

[murhf3]

you dont NEED one when you change pipes, but you never needed to change jets on carbs when you did it back in the day either but you do to make your bike run better.

The stock ecu will be designed with the stock parts and emission controls in mind, so your bike will run nice and clean with the stock bits. When you change pipes your bike need different fueling to suit these and this is what a pcu does.

Thanks, my bike is feul injected so that would be why I had to hav one?

[murhf3]

you dont NEED one when you change pipes, but you never needed to change jets on carbs when you did it back in the day either but you do to make your bike run better.

The stock ecu will be designed with the stock parts and emission controls in mind, so your bike will run nice and clean with the stock bits. When you change pipes your bike need different fueling to suit these and this is what a pcu does.

Are they harmful in any way

[sAsLEX]

from what I have read all they do is modify the stock ecu´s output so cant see them being bad for the bike! they can smooth out the torque curve as well and remove the funny dips in power most bikes have at certain revs for Emissions regs

[murhf3]

from what I have read all they do is modify the stock ecu´s output so cant see them being bad for the bike! they can smooth out the torque curve as well and remove the funny dips in power most bikes have at certain revs for Emissions regs

Thanks mate.

[bugjuice]

an aftermarket PCU allows you to change the dynamics of your bike. You have (depending on what bike, the dealer will know this for sure) control over things like fuel/air mixture, timing etc etc, so you can customise the running of your bike for the conditions.

If you do get aftermarket pipes, then some bikes do need it, some bikes would benefit from it, and others don't need it. Each to their own.

I heard about a ZX10 with a Muzzy slipon and can. Without it, the bike backfired like a boi racer. Was a bit sluggish down low, but went well when you opened it up. Then the PCU (PCU is also the term for one brand of CP - Power Commander Unit) was fitted. The backfire stopped and it became more smooth under acceleration.

Another benefit is that most sports bikes are developed for the track, so that's 15,000rpm non-stop.. you don't do that [much] on the road, so the manufacturers take it down a bit to comprimise. This means that it's not the best setup for a street bike, nor the best setup for a track bike, it's trying to do the best for both worlds. A PCU fitted can have several settings, depending on what model. If you get the bike dyno'd by a pro shop, they will set the bike up for you to the right settings. An example of a 2 setting PCU would be a street setting (so you don't use as much fuel, and you don't need all the power on tap) and a track day setting (you don't need as much low-down torque, so you can adjust the higher end for high revving power). You can go as far as having a 'wet' setting etc etc.

If you have confidence, and/or remember the settings, you can start to play with it, scrub out a low spot in the rev range, get another 50ks from a tank etc.

It just changes the settings of the engine via the bikes' stock plugs. Most racers have them, and it's becoming more popular on street bikes. I'm saving for one with a Muzzy system on my bike.. The ZX10 is a mental bike to start with. The Muzzy can and PCU just made it worse! can't wait..

As for if they're harmful - they can be, because they're changing the way the engine runs. If you have no idea about what you're doing and you hook your bike up to your computer and play, you could run it rich/lean and burn out the rings etc. You can go as far as changing individual cylinders to run different settings. In the wrong hands, you can do a lot of damage. In the right hands, you'd never know it was fitted

[murhf3]

an aftermarket PCU allows you to change the dynamics of your bike. You have (depending on what bike, the dealer will know this for sure) control over things like fuel/air mixture, timing etc etc, so you can customise the running of your bike for the conditions.

If you do get aftermarket pipes, then some bikes do need it, some bikes would benefit from it, and others don't need it. Each to their own.

I heard about a ZX10 with a Muzzy slipon and can. Without it, the bike backfired like a boi racer. Was a bit sluggish down low, but went well when you opened it up. Then the PCU (PCU is also the term for one brand of CP - Power Commander Unit) was fitted. The backfire stopped and it became more smooth under acceleration.

Another benefit is that most sports bikes are developed for the track, so that's 15,000rpm non-stop.. you don't do that [much] on the road, so the manufacturers take it down a bit to comprimise. This means that it's not the best setup for a street bike, nor the best setup for a track bike, it's trying to do the best for both worlds. A PCU fitted can have several settings, depending on what model. If you get the bike dyno'd by a pro shop, they will set the bike up for you to the right settings. An example of a 2 setting PCU would be a street setting (so you don't use as much fuel, and you don't need all the power on tap) and a track day setting (you don't need as much low-down torque, so you can adjust the higher end for high revving power). You can go as far as having a 'wet' setting etc etc.

If you have confidence, and/or remember the settings, you can start to play with it, scrub out a low spot in the rev range, get another 50ks from a tank etc.

It just changes the settings of the engine via the bikes' stock plugs. Most racers have them, and it's becoming more popular on street bikes. I'm saving for one with a Muzzy system on my bike.. The ZX10 is a mental bike to start with. The Muzzy can and PCU just made it worse! can't wait..

that answers all my questions, thanks.Oh by the way the pipes I got are vance and hines.

[Lou Girardin]

Normally referred to as PC2 or PC3 = Power Commander 2, etc.

[TwoSeven]

Power command unit,like the ecu,s on cars.Little computers that adjust your performance on a dyno.

Ok, never heard it called a p.c.u before.

The change the spark and injector timing depending on throttle position and a few other things. Its just changing the engine map. Beats owning a duke or 'prilia and having to buy those silly eproms.

The power commanders are programmable off of a dyno - so you can calibrate your engine changes more closely.

[dangerous]

Ok, never heard it called a p.c.u before.

The change the spark and injector timing depending on throttle position and a few other things. Its just changing the engine map. Beats owning a duke or 'prilia and having to buy those silly eproms.

The power commanders are programmable off of a dyno - so you can calibrate your engine changes more closely.

The bike has a ECU (electronic control unit) the PCU (power control unit) is an after market item to help with performance and has changable settings for the day...... a eprom is the chip that runs the ECU, it is just a chip that is remaped for better engine control.
Withe the Moto Guzzi the std eprom chip is crap with a dead spot at 4000rpm, a after market eprom is beter maped and removes the dead spot and sorts the ECU out...... if a PCU is used in conjunction with a beter eprom then even beter computer managment can be sorted.

[Jackrat]

Is there any danger of damaging a PCU if the battery is flat, and you were to jump start it using cables?
Or can it lose it's memory, like a certain cars computer does if the battery is disconnected for to long?
???????????