Well guys 'n' gals! I had my bike on the dyno last week! I remember reading that any dyno operator worth there salt disables the PAIR secondery air system but when gettin my bike done i asked the guy about this and he said thats fine for track bike intentions but for the road it isn't advised because the bike runs on dirty air which causes damage also if it is disabled then re-enable after the dyno then that give an in-accurate map and for the road the 2ndry air system is to filter out fine road dust & crap so running without badly effects engine life! I got 2 maps done! A full power with baffle out and a fuel economy with baffle in! I probably will do a track day in the future but I am mostly a road rider! It makes sense to me but I'd like to know what you guys think! Cheers Trev
You can not map a bike with the PAIR system running, the air it adds into the exhaust system gives a false reading to the sensor used to measure the AFR, it has nothing to do with road or track. The air is taken from the air box and released into the exhaust through a small vent that comes out just after the exhaust valve, the air then ignites any part burn gasses that are present in the exhaust system to reduce harmful gasses entering the atmosphere. Note that the air enters the system after the cylinders and has nothing to do with combustion therefore dose not and can not effect power in any way. If you take a reading with the PAIR system running then it will read lean the dyno opp will then add fuel to compensate for the air and incorrectly map for it, thus it has to be temporarily disabled, once mapped it can be left to do its thing, the bikes O2 sensor should be dissabled by means of the O2 eliminator supplied from dynojet to stop any closed loop correction. Also note the OEM O2 sensors are narrow and only have very basic sampling capability. Oh and I have no idea what the dyno opp is taking about dirty air?? The PAIR system collects air from the air box as its filtered why would you use dirty air? lost me there...
I had above same information given to me , got my bike dynoed by a guy in Harrogate called Daimen from Daytuner , I had myself disabled the pair system before taking for mapping , when he had finished he advised me to put the pair system back in to operation as it would make the bike pull away better at low revs , he also told me the HRC Kits to by pass the pairs system are really for use when standard cams are replaced with the HRC ones
Bobmg, sorry mate but that's tosh too, if your running a can you will find that with the PAIR system active you will get lots of over run and popping, sounds cool maybe but the reason is the air, the air randomly ignights part burn fuel in the exhaust and the result is the popping, as for cams required etc, never heard of such BS.. Like I say time and time again mate think about it... the air enters the exhaust AFTER combustion thus there is NO WAY it can effect the running of the bike! The air it puts into the exhaust is no better than a HOLE in your system, it is only there to dilute hydrocarbons and other toxic chemicals and help burn them off, if you had your bike mapped with it dissabled then reconnect it you will only get over run at worse... Now IF you were to run the bike with out and O2 eliminator you could argue that the bike will try and control the close loop zone with effect as the air is no longer present BUT take into account that the OEM lambda sensor is only NARROW band and can not accurately sample AFR to map, the close loop zone is where they test bikes for Euro laws normally from 1,000 RPM through to aprox 4,500 RPM. One other point for those that get fed such tosh is IF there were gains to be had do you not think the race teams would use the system, why sell block of plates to dissable it if you can gain power by using it? What gets me going with this simple matter is Dyno Opps,,,,,,why oh why do they talk such tosh, do they notnunderstandbthe simple functions of a combustion engine....lol
Cheers Arthur, Ahh Fuck!!! He said that disabling the PAIR involves removing the rocker covers is that true or is that tosh as well?
Tosh.....pmsl.... simple block off plates mate, or stuff a marble down the intake hose... loads of how to do's on here..
I cut the hose and inserted a 2" long piece of wood dowel snug fit and then cable tied each end , do you then suggest i replace the dowel and block it off again , have to say though no popping on over run , had a 2006 Fazer before the Blade and that was terrible for it , flames on over run and popping all the time till i blocked the pair valve The way you have expained Arthur was the way i understood things till I took bike to be dynoed
Sounds like you've done it mate... some are worse than others for overrun... I love a bit of over run, it's funny coz those that want it don't get it.....lol
LoL shoot that dyno man!! Arthur spot on man! My dyno man is sound and proper knows his shit also good mates with the main 4stroke engine tuner who also confirms all that dyno man says! This is the info i got leave it on till you do sparkplugs then block em off for easier access to the plugs thats why we do it! and that will do me
I'm guessing if I were to book my bike in with DynoTech in Tadley, they would know what they were doing regarding blocking off the PAIR system?
On my CBR600RR 05, I fitted the HRC block off kit which was metal plugs, hose clamps and instuctions on what pipes to cut and how much to cut off. Heres the kit for the Blade;
I love the overrun popping and banging - I guess thats why mine doesnt do it!!! My Hayabusa used to be great on the overrun with its 4-1 Yoshi full system. Thats the only bit of it I miss.
Thanks again Arthur I've just got off the blower too Dynojet Not that i don't trust what u all say by any means but to confirm that i had spoken to Dynojet when i go back to see that Lazy Fat Bullshittin' Bastard that dyno'd my bike when he gets back from the TT's Please can you tell me where the O2 eliminator is fitted? Just so i can check that it has been fitted and not kept so he can sell it in his shop! Cheers from Totally Pissed Off Trev.
Ball bearing down the pair tube for me, LoL. Its a shame that there are nobbers out there spouting crap when dyno-ing peoples bikes. Like everything I suppose, there are good and bad uns.
