Remus full system, remap?

[mak595]

Can a Remus decatt system just be bolted up and the ECU adapt?
I know the ideal would be a hilltop remap or similar but is it strictly necessary?

 

[Roger 04 RT]

Yes.
No.

 

[Tractors are go]

I've got decat and akra without baffle, 2007 gsa, and got hilltop to set up fueling etc.

It is your money/decision, when you see how lean they run you'll be surprised you still have exhaust valves.

 

[comberjohn]

Spend your money on the remap or the AF-XiED units first. You won't believe the difference.
You'll end up doing it later anyway.

 

[younger06]

Must resist........must resist!!!!

 

[Sgt Bilco]

Can a Remus decatt system just be bolted up and the ECU adapt?
I know the ideal would be a hilltop remap or similar but is it strictly necessary?

My view is if you want noise and a fairly decent up in mid range, put the Remus on. The bike will adapt no problem and you will be fine. Just don't run with no baffle or K&N as it will be too lean. I've tried all this and found running with baffle and standard filter gives you the best results.

However, if you want the big shove in all round power and ridability, forget the Remus and get Hilltopped.

Either way is good but after fannying around for years with all sorts of options on mine, I currently run decatted keihan headers, end can and PC111, next time round I'll just wheel it over to Hilltop and be done with it.

 

[younger06]

Wait for the dollar to tank and buy the AFX witchcraft thingamebobbys.

Sent from a OnePlusX

 

[Bendy toy]

The snag with any add on is they are - add-ons. More connections to fail and its in full daylight.

Remap uses original equipment as originally intended.

I have an Akra stacked can system and a PC V. It runs a bit rich but nothing serious. With baffles it runs very rich so needs a dyno to properly sort it out.
That's the issue with PC - change the setup and the ECU can't compensate. With AF-XIED or remap the ECU can compensate.

It will eventually get Hilltopped because I don't want the add-ons. There are pros and cons either way.

 

[Wreford Miles]

My view is if you want noise and a fairly decent up in mid range, put the Remus on. The bike will adapt no problem and you will be fine. Just don't run with no baffle or K&N as it will be too lean. I've tried all this and found running with baffle and standard filter gives you the best results.

However, if you want the big shove in all round power and ridability, forget the Remus and get Hilltopped.

Either way is good but after fannying around for years with all sorts of options on mine, I currently run decatted keihan headers, end can and PC111, next time round I'll just wheel it over to Hilltop and be done with it.

Would you not even bother with de cat headers?

My 1200TC just has a hilltop, everything else is standard...

I like the way it pulls and sounds and have no desire to have de cat headers an no flappy valve other than wondering am I missing something by not doing that.

If I'm reading you correctly I'm not, which would be good

 

[oldnfat]

Would you not even bother with de cat headers?

My 1200TC just has a hilltop, everything else is standard...

I like the way it pulls and sounds and have no desire to have de cat headers an no flappy valve other than wondering am I missing something by not doing that.

If I'm reading you correctly I'm not, which would be good

I agree with both of you....I have gone back to standard headers and can with the AF XIED units....either get these or get Hilltop'd and forget faffing around with other stuff as none of it overcomes the fundamental problem of the motor running too lean or the 4500rpm emissions hole.

 

[Bendy toy]

I have used Remus decat headers with standard GSA silencer can the difference to standard with catalyst was remarkable. I got the same again when the fuelling was sorted so I would say decat headers are worth the money. I bought the Remus used and resold for what I'd paid when I went to a full Akra system.

Did I need the Akra? Of course not, but it's Titanium with twin stacked cans & I'm a tart.

 

[mak595]

Reason i'm asking is that a just got a full (secondhand) remus system at a good price but i might upgrade my 04 GS with an ADV later next year (and swop the system over) so really wanted to bolt on and go rather than spend money on a remap for a bike i might not have that long.

If its ok with baffle fitted, thats good enough for me

Out of interest, how much is a hilltop remap?

 

[Hexme]

I'm a tart.

Hehe.

 

[comberjohn]

That's a no brainer. If you're thinking of changing next year, don't waste your £350 on a remap.
The AF XiED's however...

 

[Hexme]

That's a no brainer. If you're thinking of changing next year, don't waste your £350 on a remap.
The AF XiED's however...

I'm really considering this, especially after reading your very helpful post John.

 

[Greenman14]

If you haven't already bought the exhaust and you're on a budget a remap will make much more of an improvement that changing the exhaust on its own. Doing both gives you a completely different and better bike.

 

[WelshCH]

How does the AF XIED differ from the Accelerator Module or Booster Plug? I have the former which, with a Remus exhaust, seems to have made a difference with the smoothness of the engine, reducing the popping from the exhaust and also has lowered the running temperature of the engine.

Cheers

Aled

 

[Mistacat]

The accelerator module is a resistor which fits in series with the air temperature sensor, so that the ECU thinks that it is colder than it is, so compensates by enriching the mixture (AFR).
The problem is the lambda sensor sees this rich mixture and the ecu leans it out in closed loop. It works in open loop the module works for a while until the ECU adapts it out with long term fuel trims.
The AF-XIED is a totally different kettle of fish.
The lambda sensor measures the o2 content in the exhaust and reports this back to the ECU so the Air Fuel Ratio can be kept at 14.7 to 1 ( this ratio is necessarily for the catalytic converter to work).
The Af-XIED digitally modifies the lambda sensor signal to a pre - determined setting say 6% increase in fuel.
The ECU still thinks it is running at 14.7 to 1 but it is actually doing its best to keep the air fuel ratio at say 13.8 to 1 . ( this happens in closed loop)
What is more important is that in time the open loop will adapt to these settings through long term fuel trims.
And better still it will stay at 13.8 to 1 If the fuel pressure drops, air filter starts to get blocked, injectors wear or get gummed, ethanol content of fuel varies, change of exhaust system etc, etc.
So there is no way of comparing the 2.

 

[mak595]

If you haven't already bought the exhaust and you're on a budget a remap will make much more of an improvement that changing the exhaust on its own. Doing both gives you a completely different and better bike.

Already bought the exhaust just because of the good price, i'll bang it on and see what happens next year, might end up keeping my current bike if funds wont stretch to a ADV, so would look for a remap or AF then......

 

[WelshCH]

The accelerator module is a resistor which fits in series with the air temperature sensor, so that the ECU thinks that it is colder than it is, so compensates by enriching the mixture (AFR).
The problem is the lambda sensor sees this rich mixture and the ecu leans it out in closed loop. It works in open loop the module works for a while until the ECU adapts it out with long term fuel trims.
The AF-XIED is a totally different kettle of fish.
The lambda sensor measures the o2 content in the exhaust and reports this back to the ECU so the Air Fuel Ratio can be kept at 14.7 to 1 ( this ratio is necessarily for the catalytic converter to work).
The Af-XIED digitally modifies the lambda sensor signal to a pre - determined setting say 6% increase in fuel.
The ECU still thinks it is running at 14.7 to 1 but it is actually doing its best to keep the air fuel ratio at say 13.8 to 1 . ( this happens in closed loop)
What is more important is that in time the open loop will adapt to these settings through long term fuel trims.
And better still it will stay at 13.8 to 1 If the fuel pressure drops, air filter starts to get blocked, injectors wear or get gummed, ethanol content of fuel varies, change of exhaust system etc, etc.
So there is no way of comparing the 2.

Thanks Mistacat - very clearly explained. I plan on getting the AF-XIED.

Cheers

Aled