Need Advice on CPU with New Aftermarket Can.

**Fart** · 2nd October 2005, 16:45

I have just ordered a Two Brother Carbon slip on muffler for my CBR600RR. I should get it in a week so.

I need advice from a mechanic. Do I need to change my factory computer to a Power Commander? Can I run the Two Bro aftermarket muffler on existing computer? Dont want to fuck up the engine for the sack of a few humdred dollars.

Cheers

**jimbo600** · 2nd October 2005, 16:59

Originally Posted by Fart

I have just ordered a Two Brother Carbon slip on muffler for my CBR600RR. I should get it in a week so.

I need advice from a mechanic. Do I need to change my factory computer to a Power Commander? Can I run the Two Bro aftermarket muffler on existing computer? Dont want to fuck up the engine for the sack of a few humdred dollars.

Cheers

Aftermarket cans bolt straight onto fuel injected bikes no worries as the many sensors sort all the fuelling out automatically. However, to get the most out of it a PCIII is the way to go but not necessary. Don't expect too much from a bolt on, mainly better sound and weight saving. Manufacturers are so good at putting together standard cans these days that to get big gains mucho dollars needs to be spent. CBR600RR + Two Bros carbon = nice mate!!

**WINJA** · 2nd October 2005, 17:36

Originally Posted by jimbo600

Aftermarket cans bolt straight onto fuel injected bikes no worries as the many sensors sort all the fuelling out automatically. However, to get the most out of it a PCIII is the way to go but not necessary. Don't expect too much from a bolt on, mainly better sound and weight saving. Manufacturers are so good at putting together standard cans these days that to get big gains mucho dollars needs to be spent. CBR600RR + Two Bros carbon = nice mate!!

HOW DO THESE SENSORS SORT THE FUELNG OUT , I KNOW THEY CAN SENSE PREASURE , TEMPS ,RPM AND THROTTLE POSITION , BUT AS FOR FLOW OF AIR????THE BIKE DOESNT KNOW IF IT HAS A STOCK SYSTEM , 4 TO 1 OR LAKE PIPES. WITH A CAN THE FUELING WILL STAY THE SAME WITH THE ABOVE PARAMETERS SO THE BIKE WILL PROLLY RUN RICH DOWN LOW AND LEAN UP TOP BUT THE AMOUNTS ARE NEGLEGIBLE SO MOST END CANS ARE OK ON MOST BIKES

**jimbo600** · 2nd October 2005, 19:10

Originally Posted by WINJA

HOW DO THESE SENSORS SORT THE FUELNG OUT , I KNOW THEY CAN SENSE PREASURE , TEMPS ,RPM AND THROTTLE POSITION , BUT AS FOR FLOW OF AIR????THE BIKE DOESNT KNOW IF IT HAS A STOCK SYSTEM , 4 TO 1 OR LAKE PIPES. WITH A CAN THE FUELING WILL STAY THE SAME WITH THE ABOVE PARAMETERS SO THE BIKE WILL PROLLY RUN RICH DOWN LOW AND LEAN UP TOP BUT THE AMOUNTS ARE NEGLEGIBLE SO MOST END CANS ARE OK ON MOST BIKES

Fuck knows mate I aint no mechanic I'm an artist you know. All I'm sure of is that you don't need to fuck with FI bikes after fitting an aftermarket can. I got a TEKA tune done to the gixxer after a bolt on and made heaps of difference.

**WINJA** · 2nd October 2005, 19:14

Originally Posted by jimbo600

Fuck knows mate I aint no mechanic I'm an artist you know. All I'm sure of is that you don't need to fuck with FI bikes after fitting an aftermarket can. I got a TEKA tune done to the gixxer after a bolt on and made heaps of difference.

THE TEKA TUNE MAKES A DIFFERENCE ON A STOCK BIKE .
ID HAVE TO SAY THAT THE ECU DOES NOT AUTOMATICALLY COMPENSATE AN EXHAUST CHANGE AS IT CANT MEASURE AIR FLOW LIKE SOME CARS

**jimbo600** · 2nd October 2005, 19:33

Originally Posted by WINJA

THE TEKA TUNE MAKES A DIFFERENCE ON A STOCK BIKE .
ID HAVE TO SAY THAT THE ECU DOES NOT AUTOMATICALLY COMPENSATE AN EXHAUST CHANGE AS IT CANT MEASURE AIR FLOW LIKE SOME CARS

Teka made quite a difference after a can too. Put the can on the new 600 and ran it for couple thousand k's then gave it to Hayden for the treatment. Ran better after the Teka tune. PCIII's have a good rep too but I wouldn't bother downloading maps from the net I'd get it set up locally on a dyno.

**Fart** · 3rd October 2005, 06:43

What is a TEKA tune?

So the verdict is that I can leave the existing ECU and dont need to change it? I only want it for the sound and not somuch for the performance. I am not gonna race my bike, only for road use.

**avgas** · 3rd October 2005, 07:12

while u may not need a PCII/III, its not a bad idea to have one.
Either way you need to get the bike dynoed and tuned to setup the exhaust. Otherwise you end up with wot WINJA said. the advantage of the PC2/3 is that all the maps are on the net, so all you do is download the new map to suit the change in bike parts. Exhaust, filters, cams the whole shebang....all at home....all without the dyno.
You can also mess with the maps if your in the know......and get some cool stuff happening

**Mr Skid** · 3rd October 2005, 07:36

Originally Posted by Fart

I only want it for the sound and not somuch for the performance.

I bet you've got spinners on your car too.

**Lou Girardin** · 3rd October 2005, 07:44

Originally Posted by Fart

I have just ordered a Two Brother Carbon slip on muffler for my CBR600RR. I should get it in a week so.

I need advice from a mechanic. Do I need to change my factory computer to a Power Commander? Can I run the Two Bro aftermarket muffler on existing computer? Dont want to fuck up the engine for the sack of a few humdred dollars.

Cheers

Get a baseline run on a dyno (about$80) when you fit the can. Then you'll know if changes are needed to fuelling. Fuel maps off the interweb may not be ideal, because not all engines, fuels etc are identical. We had a Hornet here with a downloaded map in the PC3, it was still significantly lean.
Few bikes have 02 sensors, so they can't compensate for exhaust changes like car ECU's can.

**Fart** · 3rd October 2005, 07:46

Originally Posted by Mr Skid

I bet you've got spinners on your car too.

Nope, just a couple of large fluffy dice hanging in front.

**Fart** · 3rd October 2005, 07:46

Originally Posted by Lou Girardin

Get a baseline run on a dyno (about$80) when you fit the can. Then you'll know if changes are needed to fuelling.

Thanks mate. Where can I get that done?

**Ixion** · 3rd October 2005, 10:31

Originally Posted by WINJA

HOW DO THESE SENSORS SORT THE FUELNG OUT , I KNOW THEY CAN SENSE PREASURE , TEMPS ,RPM AND THROTTLE POSITION , BUT AS FOR FLOW OF AIR????THE BIKE DOESNT KNOW IF IT HAS A STOCK SYSTEM , 4 TO 1 OR LAKE PIPES. WITH A CAN THE FUELING WILL STAY THE SAME WITH THE ABOVE PARAMETERS SO THE BIKE WILL PROLLY RUN RICH DOWN LOW AND LEAN UP TOP BUT THE AMOUNTS ARE NEGLEGIBLE SO MOST END CANS ARE OK ON MOST BIKES

BMW has an air flow meter. Prolly another BMW wierdness though.