performance air filter without re- map

[salty21]

been thinking of getting a afternarket air filter for the cbr (which as you probablty know is PGMFI wotsit ma jiggy). would it do any harm to the bike if i were to fit one without reprogramming the ecu with a power commander etc... i will get one at some point just cant afford one at the mo.

I already have a slip on scorpion can and i know i would probably drop a few more horses than i probably have already with the exhaust, but i dont mind really as it could help with the pending winter commutes by not making it as fierce.

ta
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[.....]

Don't bother, you won't notice any difference.

The RR isn't fierce anyway, just be gentle with the throttle.

[salty21]

was more for the induction noise really, if bikes are like cars in that sense
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[Kickstart]

Hi

With cars they get noisier when fitted with a cone type filter. That means dumping the airbox. You could fit individual filters to the bike, but expect it to run badly even if set up.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[salty21]

it was just a replacement air filter element that i was thinking of, one that fits into the origional airbox, am just unsure if it would cause any damage to the engine with leaning out the mixture.
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[Wafer_Thin_Ham]

The ECU would correct a little bit, but with the exhaust it could well tip it over the end and it'll run lean. Fit a PCIII it's worth the 280 quid.
____________________
My Flickr

[rotax81]

[Kickstart]

[salty21]

so best just to save for a pcIII then?. Are they really worth the money? what gains should i expect?
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[rotax81]

realistically you will only gain from a pc111 with a dyno run. the maps they have dont realy suit as one bike off the production line will be different to the next.
as keith said with the filter. if you change it i doubt there will be any noticeable difference in power and noise, the original filters these days are very good.

so is it all worth it? i doubt it, best leave as is and wait for a bigger bike to do mods to


____________________
ZX636C6F road. ZX636C1H track. ZX7R redundant. ZX0.5R minimoto as ornament.
Audi A4 Avant 1.9TDi and VW Transporter 2.5TDi 888 Special (no mot and tax lol)

[Wafer_Thin_Ham]

[salty21]

everything is standard apart from the slip on exhaust, not sure if i will be doing anything else to it engine wise as i will probably just buy a bigger bike if i want to go faster.
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[ZaphodBeeble]

The best thing a PCIII does to a bike is smooth out the whole rev range and give you a bit more torque. Top end power isn't always the be-all-and-end-all of a good bike setup. Stock maps generally tend to be a bit off because general wear and tear on the engine causes your bike to fuel differently. If for example you have a few tight valves and the PCIII map was setup on a bike which had just had all its valves done then your fuelling would be off. You really have to get it tweaked for it to be perfect. Either that or get your bike setup exactly how the PCIII test-bike was setup!
____________________
Current bike: VTR1000F Firestorm. Previous: Firestorm (written off) - XJ600 Divvy - NSR125 - DT125 and a load of offroaders.

[stevo as b4]

Id expect no more than 5bhp increase at the rear wheel with a custom mapped PC3, race can and a freer flowing air filter element fitted. It might give a bit more than that in the mid range, and the real advantage of a power commander/ other piggyback ECU, is that you can map out any flat spots in most cases, that are engineered in by the factory for either emmissions or noise limits. It's worth doing if you really want the best out of your bike and it running to it's fullest potential. However if it's just more power and torque you want when you crack open the throttle, then saving the cash towards a bigger bike is a much better bet!

I used to have a Kawasaki ZX6R J1, and i considered the race can, dyno jet, K&N filter and ignition advancer tuning route. However Dynojet sent me some dyno charts which showed a stock power curve but with a gain of about 4-4.5bhp from 8000-13000rpm. This isn't what i was after really as id have liked the gains much lower down the rev range than that TBH.

[Mr Nice Guy]

[Syx]

£240 is still £40 less than £280 though... and you know what they say about a penny saved.