Fuel management system / flash for akra catless headers?

Hi everyone, new to the forum. Picked up my 2020 RS earlier this month and like most new moto owners, have been on a mod, detailing, accessory streak.

I did not see any threads speaking of this but i am curious if either there is some sort of fuel management system / flash for catless heads, or if this bike has a fuel system that can compensate for it stock. The big O2 sensors are a curiosity to me since they dont look like typical narrow bands and dont quite look like wide bands that ive seen.

Any help or ideas would be appreciated

This thread may be of some help
Max BMW Tuning

Thanks duccrazydave, i dont think theyre talking about the 1250 though. I knowbthat there are some options out there for the 1200. Maybe the 1250 is too new of a platform and needs some companies to catch up

A mate who has a R1250GS and me (R1250RS) got a bit of a deal on a pair of Mivv No Cat stainless headers. After contacting several well know UK dyno houses, they all said that they were unable to crack the latest BMW ECUs , but my mate persevered and found a local ECU engineering form who specialised in race car ECUs but also did bike ECUs, had a dyno, and reckoned that could do the job. In a nutshell, my mate had his bike done first; the ECU had already logged a self learning 10% adjustment in the first 50 miles, wasn't dangerously lean 'had seen far worse' was the comment after the initial benchmark run. After much fiddling, it was richened slightly, a bit more advance added but only gained max. 4 hp mid, and 3 top. The only issue was a FI error which we assumed was the post cat lambda but turned out to be an exhaust valve warning, even though it was still plugged in, just had the cables removed. At my mates advice, I've fitted the headers, a Healtech servo eliminator, and am not going to bother with the (expensive) dyno time. There was a definite improvement in the idle smoothness and response after the first 30 mile run, and it has seemed to have improved again since. Converesly, my mates bike is now using less fuel and smells less fuelly on start up; the ECU in his GS may well be readjusting around his remap parameters which further brings into question the value of a remap. As context, my RC8R is the sixth bike that's been dyno set up; I don't look for big numbers, but throttle response and driveability.

I forgot to clarify; the lambda sensors in the headers are wide band, hence the ability to self adjust. The post cat sensor is a narrow band which just looks for cat damage, which is why we thought the FI error was that. Also, BMWs are one of the few manufacturers to fit knock sensors which is why they can run closed loop engine management. Hope this helps.

Steviejuk

Thank you for the answer and the R&D on this topic. I have been down the road of modding motos for 20 years now so i understand the realities of this topic.

So as far as whats basically happening is that this engine is set up with a closed loop fuel system that can adjust a wider and more precise range of air/fuel based on a pre programmed map.
I guess it would be debatable if there were any worth while gains, but it should be able to adjust enough to smooth things out without going too lean, and ofcourse sounding better.

Have you noticed any issues other than the servo? Engine running hotter than usual? Etc.

I believe the Akra heads come with a flapper.

I'm normally pretty cautious with fuelling, like you 30 years of modding bikes, carbs and plug chops were second nature to me, so I'd get my RS on a Dyno if I wasn't happy. It doesn't ride lean, still has the nice throttle pick up, isn't running any higher water temps and the pipes are just turning a good straw colour although its a bit soon for any blueing to show. It seems to have a bit more go off the bottom and mid range, so far I'm happy that's it' seems to be compensating ok.

Sounds like ill be picking those headers up lol
Thank you for the help, its greatly appreciated

Quick update on cat-less headers. I was running on super unleaded (98 octane) and all felt as above. I filled up with standard (95 octane) and it didn't like it as much; there was no misfiring or overt holding back under load, it just didn't feel as responsive or pull as hard off the bottom. It just felt lean. I've booked in for a remap - its a lot of money, but peace of mind is worth it for me. If the fuel in is the U.S. is lower octane (I think it may be), you may have an issue. P.S. I have an SC project slip on with a the baffle fitted, but subtly modified a little.

Good info from you both. Here in the US in New York we have 93 octane (97.4 euro)? Looking at the chart (nice work btw).The catless headers should be coming in the mail by the end of next week and ill install them probably by sunday or so. I will report back if i notice anything after riding a few miles.

I have the akra can with db killers in, in place of your sc project. The main difference would be that the akra catless headers have a flapper.

I would love to hear how it feels after the tune.

Its on the dyno next monday - I'll let you know. I have a sneaking suspicion it'll be a lot of money for minimal gain, but as I ride abroad a lot, I want t make sure its good on whatever fuel I can get. (back of beyond Italian village.....!)

Zitat von Steviejuk im Beitrag #4

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A mate who has a R1250GS and me (R1250RS) got a bit of a deal on a pair of Mivv No Cat stainless headers. After contacting several well know UK dyno houses, they all said that they were unable to crack the latest BMW ECUs , but my mate persevered ......

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Looking forward to the results. I am in agreement with your suspisions, hopefully a remap would at least smooth out and add at least a slight gain troughout the rev range

I'll find out about the re learning next week - I tend to ask questions........ As for Hilltop, I wouldn't touch 'em with a bargepole A mate had his 900 Tracer worked on by Hilltop with his 'learning program', and he reckoned it wasn't that noticeable, he didn't like him and it caused no end of issues when he went somewhere else to try to get his quick-shifter activated. Ask the question, how do you emulate a wide band 02 sensor with the narrow band which he uses? I've also seen a Youtube clip of him 'remapping' a 1250GS - what he did, didn't look to be fueling, but the ride by wire throttle mapping, very different so be careful.