r550s wrote:...... that the SJ powerfilter uses a hard-to-get bespoke item (cos it was the right shape for what they had in mind)
If I remember correctly it is a stock (in the US) filter for a JCB type thing. It is a round filter that needs to be easily squeezed into an oval shape for the PowerFilter.
Incidentally, if you are going to get one from the US, then deal with K&N. SanJose BMW were less than helpful - they denied that they even knew the K&N number.
Blimey is it worth the bother,a SJ is what £85 + shipping+ duty,assuming you can't work a way to get one shipped over to avoid it,i spent my energy avoiding that rather than building my own Heath Robertson version,and besides a stock K+N for an S is 30 quid.
Re the Induct,not sure how far back you can go on the Pelican,does it work?? first time i used my S with it on scared the crap out of myself when i banged the engine off the rev limiter which i'd never done before,but you'll never see the best of it without the SJ and a PC,some have gone the chip route,but if the bike is on a dyno and you don't like the way the engine runs or you want to alter the fuelling your knackered.
Re the number,yep thats whats on the molding,i only had access to it as my S is spread all over the garage floor at the mo.
throttlemeister wrote:I have one, and I barely notice it. Then again, I don't have much interest in going WOT in a straight line.
Would be interesting to know which flows the most air. The airbox or the schnorkel, then you would know which was the biggest restriction and work on that. Has anyone flowtested them/ To my mind it looks like the schnorkel so would start there.
some time ago (if i remember rightly - and these days that's getting rarer), a contributor to this board (or was it pelican?) took a well-justified dislike to the OE snorkel, and went to work with a tank-cutter - making two large holes near the restriction. His initial seat-of-the-pants assesment was that it was a benefit. To the guy's big-time credit, when he later dynoed it he retracted this assesment - saying maybe the extra induction noise/altered shape of the power curve, had fooled him. Three things to note: 1 the guy who did it was an proper two-wheeled hero for a) trying it, b) properly testing it & c) not bullshitting. 2: There's some subtlety in the flow dynamics down an inlet tube. 3: Subjective feel & the shape of a power curve, and noise, and mucking about with your own spanners, all count when it comes to satisfaction!
'Hinterachsge' translates as 'rear axle'.(Not 'Differential', so f*** off)
Digressing slightly, as part of my ongoing 12K service I decided to change the fuel filter. Not due till 24K I know but decided to change it all the same.
WHAT A TW*T OF A JOB. BMW could not have made it harder if they tried. Hoses that won't part, pump assemblies that won't leave the tank and seized hose clips galore. In the end a stanley knife was the only way the fuel pipes were going to part company with each other which meant new hose had to be sourced. As luck would have it my local Auto factors had plenty and sold me a meter.
Can't wait to drain the gear box oil
Cheers, cobbster.
Mick Jagger : "These aren't wrinkles, there laughter lines mate". George Melly : " Nothings that funny!!!!".
Digressing slightly, as part of my ongoing 12K service I decided to change the fuel filter. Not due till 24K I know but decided to change it all the same.
WHAT A TW*T OF A JOB. BMW could not have made it harder if they tried. Hoses that won't part, pump assemblies that won't leave the tank and seized hose clips galore. In the end a stanley knife was the only way the fuel pipes were going to part company with each other which meant new hose had to be sourced. As luck would have it my local Auto factors had plenty and sold me a meter.
Can't wait to drain the gear box oil
Cheers, cobbster.
Why its a 5 min job max? Do the final drive at the same time. Same oil too
I know what you mean its not a long job but catching the exiting oil can be an art in itself. I made a tool to get at the drain plug the last time I changed it so I'm half way there.
On the same subject I managed to source some Mobil 1 fully synth gear box oil for £11 per ltr. I think the guy forgot to charge the VAT cos it was more like £13 the last time I bought it from him.
So its gearbox, final drive and brake fluids tomorrow. Engine oil will have to wait till I get a filter and throttle body sync plus tappets next week.
Cheers, Cobbster.
Mick Jagger : "These aren't wrinkles, there laughter lines mate". George Melly : " Nothings that funny!!!!".
val singleton's powerfilter
It's part no. RU-1180 from K&N's universal straight oval filter range, but there's a few of them that share the same dimensions viz. 4.5" x 3.75" oval x 5" length/height. It comes with a round neck - trim it away with a stanley knife & glue it into the oval hole in the OE airbox top. Then you need 4 coathangers and some tinsel...
'Hinterachsge' translates as 'rear axle'.(Not 'Differential', so f*** off)
r550s wrote:val singleton's powerfilter
It's part no. RU-1180 from K&N's universal straight oval filter range, but there's a few of them that share the same dimensions viz. 4.5" x 3.75" oval x 5" length/height. It comes with a round neck - trim it away with a stanley knife & glue it into the oval hole in the OE airbox top. Then you need 4 coathangers and some tinsel...
Thanks for the pictures. That looks spot on, Im going to do that over the xmas holidays. Just as good as the SJ filter and is cheaper and must be lighter.
Did you use epoxy resin to glue? Where is the best place to get K&Ns?from?
I only did it because I was poverty-stricken after buying an induct and Lennie said I'd get a bigger hit by fitting a powerfilter at the same time...
Epoxy didn't seem to stick 100% to the plastic that the airbox top is made from, I ended up using a tube of solvent for plastic waste pipes.
Fuelling - I'd guess that it wouldn't have a significant effect on a standard bike - certainly nothing like the effect that a easily-blocked OE filter could have (although blocked filters richen the mixture -safe, whereas better airflow leans the mixture -dodgy). Despite my layman's misgivings, BMW must have been satisified that the OE design didn't just throw away horsepower. OTOH, a few thousand winter miles can soon block up the OE filter (why is the air inlet behind the front wheel - was it too expensive to connect it up to the hole below the LH indicator pod?)
...then you take that lovely induct out of its box - and it just doesn't make sense to clamp the OE filter across the end of it. Course, by this time you're in the vortex - you've significantly altered the OE intake, so you might as well fit a power commander to make the most of it (and save your pistons!)...
'Hinterachsge' translates as 'rear axle'.(Not 'Differential', so f*** off)
I ran mine with an open pipe and SJ for 12 months or more,it had a flat spot at 4 thou,(but it did before!!)but apart from that ran fine,i'd certainley look at a secondry way of attaching the filter to the airbox top,what the hell goes one when everything is working i've no idea,but even the SJ's have a habit of coming undone,and the heat of the motor will test any glue thats used,if the two plastics have a different rate of expansion.
The PC got rid of the flat spot and just made everything gel together,it's not just the fact it'll run to the red line in any gear but how much quicker it gets there.
