San Jose powerfilter question

[Boxered]

Not got around to fitting it yet, but before I do, isn't this going to lean out the mixture? I'm running laser y piece ,road legal cans inc baffles and laser chip, and a lennies induct.
any thoughts?

Steve

[sproggy]

isn't this going to lean out the mixture?

Yes, considerably, particularly with a lennies as well. A Power Commander (set up on a dyno) is the only decent way to get the fuelling right with the mods you've got - the Laser chip only goes so far. If you don't want to cough up for a PC, at least get the bike dyno'd to find out how lean it is - then you know how much of a risk you're taking by not having the fuelling set properly......

[iandunn1100ss]

I have the same set up with my s but have a bb chip on stage 3 and after a dyno run its totally fine but the colour of the crap in the endcans outlet told me this already but i made a choice to do it anyway.
ian

[julian]

I've got Laser + chip, Lennies & SJ filter. I would say that it runs rich by the exhaust deposit - but who knows.

Done 14k miles with this set up and about 10k miles on previous S without issue. Really should get a Power Commander though.

[r550s]

mine currently has the PCIII dyno-set up for no cat/open cans, I've just fitted a (sort of) powerfilter and a (real) induct, and I'm about to dyno it in the next few days. So I'll post the results, which'll show if/how much it leaned the top end. Still not sure how this will gauge the ram-air effect of the induct though: the dyno I use has a big old fan, but it doesn't ever feel like 120mph!

[sproggy]

I think most dyno operators will set up ram-air-equipped bikes to run a bit rich at the top end to allow for the extra air being rammed down its throat on the road. This is good practice anyway (even without ram-air) since a bike will run hotter than normal at sustained high revs and a bit of extra fuel will cool it and tend to prevent damage to pistons/valves otherwise possible due to lean running and/or heat buildup.

My PC arrived today and I'll fit it at the weekend but PDQ are currently taking bookings for the end of April so I won't be able to get it set up for a while yet.

[r550s]

thanks, that's a good point, I'll make sure I discuss it with the gyno duy.

[r550s]

dyno run yesterday - before and after comparison shows that the addition of lennies & powerfilter has added power everywhere (but note that the k@n that I took out was v dirty). the a/f is still fine up to 7800 (PCIII still using the pre-lennies map) but, at 7800 rpm the a/f suddenly gets rich (10.0) & power drops by 20rwhp by 8900. This is on a dyno with a '120mph' fan. However...out on the road it revs right out to 8900 and, although it's past its peak, it doesn't feel like its lost 20rwhp. Any thoughts on top end fuelling with the lennies - anybody used one of the dynojet a/f gauges with any success?

[tripe]

r550s,

what where the before and after figures on the dyno run?

Henry

[sproggy]

I think that's what other people have found - a lennies induct doesn't work well ona dyno but it does on the road. Which makes creating a custom fuelling map for it somewhat tricky......

[r550s]

tripe
the last dyno run was sept 06, the only alteration since then is new plugs and the induct/powerfilter. It 'looks' like the the Lennies/powerfilter has added silly amounts of hp everywhere after 3000rpm (peak is now 101rwhp, up from 93rwhp) - so I'm reluctant to post the comparison charts. But note that the old k&n that I took out was unexpectedly & horribly dirty (after only 5000m). 12 months ago, with similar spec, the engine made 99rwhp (which was probably with a clean k&n), so I'd guess that the Lennies/powerfilter has made a 'real' +2hp at peak, which in practical terms is unnoticeable. BUT, those figures are all on the dyno: where it peaks at 7800 and then drops quite sharply. On the road it zings right round to 8900. Haven't ridden it enough yet, but the on-the-road peak is going to be about 8300. Dyno schmyno, it's much quicker...

sproggy, the gyno duy wondered if the airbox pressure sensor would allow the motronic to match any on the road ram-air increase?

[tripe]

cheers for that.
When PDQ set up the PCIII they managed an extra 4hp up to 88hp, thats with powerfilter and induct. I have a Remus 2-2 system and wonder if it is that that is sapping a potential 10hp. Comparing the dyno run that PDQ did against those posted on SJBMW who used a bike with the same exhaust set up.
Without changing exhaust does can anyone speculate whether I can find those extra ponies?

[boxerpan]

......but, at 7800 rpm the a/f suddenly gets rich (10.0) & power drops by 20rwhp by 8900..........

Probably your valves bouncing - they're not desmo you know I wouln't go there on a regular basis - it's pointless as the dyno is suggesting.

[r550s]

tripe
don't be a dyno racer! the dyno is okay for working on your own bike, and maybe for like-for-like comparisons with other bikes on the same day. Dynojet-approved centres are all supposed to be regularised & calibrated, so they might well stand comparison nationally - but you can still get fair differences in the three or four consecutive runs that you do on the same test. Maybe the dyno is a tool for setting your bike, not an end in itself. I once had a mystery gain of 10hp (which I was unaware of till it went on the dyno, ahem!) I had no idea why, so I ended up telling myself that it was just my super skills at rebuilding cylinder heads (as if!) I'm still none the wiser. Funny thing, I didn't notice when 6hp of it later 'disappeared' either. I certainly wouldn't get out of bed about outright figures - I'm completely unable to guess the outright power of a bike, but most people could draw the shape of the power curve with a bit of experience.
Re my earlier post: I originally tried to write it without reference to the outright figures, but it was hard to understand.
Back to your bike - has it got road baffles? It's great fun going through the checklist - not above half full on the oil sight glass (legend has it saps power...), are the plugs decent? make sure you airbox isn't half full of oil, are the valve clearances spot on, what's compression like? Keep looking, it'll make the bike better and better. (Do the compression test first - look for 12+ bar 30-60mins after a run - open the throttle wide when you do the test)

[tripe]

r550s
Being the luddite that I am I still have so much to learn when it comes to my bike. Just when you think you understand something along comes more info and advice to keep you going, confuse or enlighten. To which I must add I am very grateful for all this advice, help and sharing of knowledge.
It is very easy to be swept away with all the goodies you can add and when you read that someone else seems to be performing better then you start looking at more changes.
my bike currently has an engine that works, shod wheels that go round and whilst being a bit tatty it still gives me a great deal of pleasure(on the road ) I think its time to concentrate on that and ride it(once I've checked the oil level, airbox, valves and compression!!!!!!!!)

Isn't it nice to see the sun shining