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Discussion Starter #1
What's the best product, the 'Juice Box' by Two Brothers, or the 'Power Commander' by Dynojet?

I know the Power commander can use a PC to tune it, where as the Juice Box cannot.

Regards,
Pete.
 

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Discussion Starter #3
powercommander mate
Hey Fritz,

How's it going man?

I'm real close to buying a Two brothers slip on rear can (unless I get cold feet) & was wanting to know the best product to help get the most from it? :banghead

Would a Power commander give any benefits if I just used that on it's own, or combined with a K&N air filter (with standard exhaust) ?

I'm just finding it hard to justify the amount of £££ needed for an aftermarket slip on rear can :O

Cheers,
Pete.
 

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hi pete

i would get the can mate really worth the change over from stock. havent bought a powercommander yet but i just running the akraprovic and look sounds and run alot better with just the slip on if weather was better could come up try it mate.
 

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Discussion Starter #5
hi pete

i would get the can mate really worth the change over from stock. havent bought a powercommander yet but i just running the akraprovic and look sounds and run alot better with just the slip on if weather was better could come up try it mate.
I'm a new rider, so I would decline the offer, but am gracious for it all the same :)

I really want a bit more torque from the bike, as my mate on his '01 R6 seems to have the edge on me (& he weighs more, lol)

Cheers,
Pete.
 

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Discussion Starter #6
Are there any motorbike rolling roads / dyno's in the North east then m8?

Regards,
Pete.
 

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kawasaki newcastle does dyno runs cheap. my brother had a 05 r6 and used kick my arse everywhere mate would worrie about it. if your new rider just enjoy the bike wouldnt bother with upgrades till up get more exp. but would get the exhaust
 

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you say you want more torque. a can wont give you a magical amount of torque. what you want to do is optimise the gearing. the -1+2 change makes a fantastic difference to the bike and is worth doing as a starting point to any further mods you make.

And it'll be the cheapest mod.
 

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I agree, I'd definitely go for the sprocket change for more torque. The bigger rear sprocket and a smaller race front sprocket will give less top end but you'll get there much quicker.

It's worth bearing in mind if you do go for race gearing your speedo will be out by 7-10%, so a speedo healer might be of use.

I changed the gearing on my old R6 and it was amazing, wheelied a lot easier and I didn't miss the top end at all. I think I'll be getting a Renthal chain and sprocket kid soon for my 636..
 

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Gotta be pedantic and say that the gearing change wont give any more power or torque, it will just alter the speed that your power/torque is available at.
If your bike revs at say 4000 (making 25bhp) at 30mph in second gear as standard, and you change the gearing so it revs at 6000 (where it's making 40bhp) at 30mph the bike will have access to more power at 30mph in 2nd even though the power curve of the motor hasn't changed at all.



Notice that the torque provided at 6000 is not a whole heap more than the torque at 4000, it's just producing it more frequently for more power. HP=TORQUE X RPM / 5252
 

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What's the best product, the 'Juice Box' by Two Brothers, or the 'Power Commander' by Dynojet?

I know the Power commander can use a PC to tune it, where as the Juice Box cannot.

Regards,
Pete.
the problem with the juice box is that it is little-known by UK tuners/dyno-operators. The idea with the juice box is that the user can change the 'fuel-trims' at high, medium and low revs, in effect pulling the air/fuel ratios where needed, for example a decat system and race-can will typically lean the mixture, you can use juice box to tweak the fuelling back to stiochiometric low/mid and rich 13.5ish under load/high revs. You could in theory do this while riding if you had a wide band oxygen sensor and air/fuel gauge or a datalogger (e.g. 14point7.com), but it is simply a way of pulling the fuel trims 'up' or 'down'.

power commander is more wide spread and you can download fuelling/iggy maps for the more common aftermarket set-ups, meaning you can probably get away without taking it to the dyno (a run on a dyno can be cheap, but labour costs of 'dyno-time' can be quite high) . Juice box is cheaper, and i wonder whether Two Brothers will start to list settings for the more common mods.
 
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