Firstly thanks to Andy at J33 Developments for his work today.
Had the ECU/Flash, Remap today with some decent results though not perfect yet by any means. Details below.
I didn't have a base run in standard form but as we all know the 2018 model bike has 148 Bhp and 79 lbft torque at the crank. So "Rear wheel" Bhp will be around 132-135 Bhp.
Pic 1 shows results in 5th gear with my modifications so far giving 146.72 Bhp and 77.91 lbft of torque, these are "Rear Wheel" figures so my modifications have so far achieved about 11 Bhp at the rear wheel and the torque figure is about bang on being down 1.09 lbft on factory figures but there is the power loss through the drive train to consider here, fuelling though is really lean in the whole rev range and this is what is strangling the engine from making decent power. Note that fitting the M4 exhaust with much longer secondaries has removed the dip usually seen on dyno curves in the 4-5500 Rpm range, Hail longer secondaries.
Pic 2 shows tick over fuel at 14.0 AFR which is on the lean side.
Pic 3 shows 4700 Rpm, 60 Mph/100 Kph in 5th gear. 14.9 AFR..too lean
Pic 4 shows 5700 Rpm, 71 Mph/114 Kph in 5th gear. 16.3 AFR..worryingly lean
Pic 5 shows 6400 Rpm, 81 Mph/130 Kph in 5th gear. 15.3 AFR..worryingly lean
Pic 6 shows 7900 Rpm, 100 Mph/160 Kph in 5th gear. 15.2 AFR..worryingly lean
Pic 7 shows power at 15%, 20%, 40%, 60%, 80% throttle openings. as you can see very lean fuelling throughout the range and at all throttle openings.
Pic 8 Shows base run and final run results, 158.98 Bhp and 81.54 lbft so a decent gain of 12.26 Bhp and 3.63 lbft of torque with ignition and fuelling modifications added to my modifications, or 26.98 Bhp increase with all modifications and remapping so far over rear wheel power of a standard bike, final run results are not perfected yet as we have still had to leave fuelling on the leaner side to get the best results with the current exhaust configuration. Adding more fuel did not benefit increased power.
The M4 full exhaust works pretty well on the bike with the standard fuelling and ignition configuration but you will see from the graphs attached there are faults in the power delivery due to the shortness of the tailpipe/silencer combination which causes problems in two area's.
1. The bottom end on low throttle isn't smooth enough though not drastically bad and hardly noticeable with the standard fuelling and ignition maps that are limiting available torque.
Now the bike has been mapped it has exaggerated this effect and it is far more noticeable, though it can be ridden around.
2. Top end power though good is restricted due to pulse waves being generated again by the shortness of the tailpipe/silencer combination.
3. The next step is to fabricate a suitable link pipe to mate to the M4 headers and fit a different silencer, I need to add a total length to the pipework silencer combination in the region of 600 to 700 mm to see better results.
Riding the bike now the changes are really noticeable and it really has made a dramatic difference to the bike as it is now. Smiles per mile increased more than the power gains, that's for sure.
More to follow once further needed modifications are done and tested.