mocfly Posted August 3, 2013 Report Posted August 3, 2013 While installing a new K&N Filter today I noticed that there are 3 holes on either side of the air filter which allow UNFILTERED AIR into the intake system. This seems wrong on the most basic level. Does anyone know what the filtration level of the K&N is versus the others? Cause the K&N looks like the micron level is pretty high. Is there a reason for this? Is it wrong? What is the corrective action if it is not how FD intended. Expect a LOA in the next few weeks for the installation of a Water Sep for the CTSW.
Jim Posted August 3, 2013 Report Posted August 3, 2013 I'd imagine it's to let the engine continue running if the filter got plugged or waterlogged.
FastEddieB Posted August 3, 2013 Report Posted August 3, 2013 Chris, That does sound totally wrong. Air will follow the path of least resistance - there should be NO holes that allow unfiltered air to bypass the filter. As far as micron size, I think a K & N passes larger particles than a pleated paper filter. I could be proven wrong with data, but I'd prefer it be from somewhere other than the K & N site!
mocfly Posted August 3, 2013 Author Report Posted August 3, 2013 Just wondering if anyone had specific knowledge. Off to the Flight Design Booth in the am.
mocfly Posted August 5, 2013 Author Report Posted August 5, 2013 I spoke with Tom and I am waiting for an answer. Anyone know if the have the air box holes exposed like i do?
C ICEY Posted August 5, 2013 Report Posted August 5, 2013 In my CT2k, there were 3 holes on each side of the filter box, where lock wire was used to wrap around and 'secure' the filter into the box. Certainly didn't make any sense to have any holes in this location. A small dab of silicon sealed each off.
mocfly Posted October 31, 2013 Author Report Posted October 31, 2013 The holes were to secure the air filter. Sealed them up with silicone and with the new K&N they are covered up. Another problem noticed was how the fiberglass hole that the carb heat actuator rod goes thru is really oblong/egg shaped and I am sure allowing unfiltered air into the engine. Anyone see this? What is the best way to fix it? I would think that a sleeve should be bonded into the glass and then have the actuator arm go thru this? It surprises me everytime I see items like this on our aircraft. Shoddy engineering.
Anticept Posted October 31, 2013 Report Posted October 31, 2013 K&N Air filters have extremely high filtering capability. They use an oil that actually works better as the filter gets dirtier. I recommend them on your car too
Jim Meade Posted October 31, 2013 Report Posted October 31, 2013 I agree with all that unfiltered air should not be a common event, but most conventional engines allow unfiltered air in when the carb ice flap is opened so while it is not a common occurrence it does happen.
sandpiper Posted October 31, 2013 Report Posted October 31, 2013 Are you talking about the stainless wire that is used to tie the mag plug, oil drain plug, and oil filter? The A&P that just did an oil change on my CTLSi and tied all three down. Unless it's unique to the injected engine, I wasn't aware there was a way to safety wire the oil filter.
Doug G. Posted October 31, 2013 Report Posted October 31, 2013 I suspect he is wrong, his track record is not particularly good.
mocfly Posted October 31, 2013 Author Report Posted October 31, 2013 Why even try correcting him anymore. It's quite obvious to all in this group that typical posts are both inaccurate and sometimes belligerent. Continuing a dialogue with him is only going to create a waste of bandwidth.
FastEddieB Posted October 31, 2013 Report Posted October 31, 2013 Roger, I've thought of safetying my oil filter, a la "belt and suspenders", but have never bothered. On the one hand, the filters on cars and motorcycles are rarely safetied, and like on the ROTAX, they do not tend to loosen on their own if tightened properly. On the other hand, why do you suppose virtually every other aircraft engine does call for safety wire on their oil filters? I do not see any obvious difference in contact area or thread pitch or any other reason they would tend to loosen on their own. Oh, and I was surprised to find that the oil pressure and magnetic plugs do not come safetied as delivered - I'm pretty sure that every ROTAX instruction I've seen for the magnetic plug, at least, has involved safety-wiring as a final step.
Tom Baker Posted October 31, 2013 Report Posted October 31, 2013 I think the Tempest Rotax oil filter has lockwire tabs. If they installed one of those there goes his Rotax warranty.
FlyingMonkey Posted October 31, 2013 Report Posted October 31, 2013 I'm planning to replace my air filter with a K&N...it sounds like I can just snip the ties, pull them through and fill in the holes with silicone, and lay the filter in the box without any ties or other securing, is that right? Does anybody have a part number or link for the correct K&N filter? Did anybody notice any better power, throttle response, or other changes with the K&N?
Ed Cesnalis Posted October 31, 2013 Report Posted October 31, 2013 I think the Tempest Rotax oil filter has lockwire tabs. If they installed one of those there goes his Rotax warranty. That seems harsh. Save 50cents and get a safety wire attachment but lose your warranty? Got popcorn? This should get interesting.
Ed Cesnalis Posted October 31, 2013 Report Posted October 31, 2013 The Tempest oil filter for a Rotax is only $.50 cents cheaper (CPS and Spruce pricing). Why on earth would anyone use that verses the Rotax and especially since the Tempest doesn't have the needed features of the Rotax filter. Roger, what are the 'needed features of the Rotax filter' that are lacking in the Tempest filter?
S4Flier Posted October 31, 2013 Report Posted October 31, 2013 Me thinks CTLSi's shop has some 'splaining to do
Tom Baker Posted October 31, 2013 Report Posted October 31, 2013 That seems harsh. Save 50cents and get a safety wire attachment but lose your warranty? Got popcorn? This should get interesting. Just saying Rotax would consider this an un-approved part, and they don't like un-approved parts.
Tom Baker Posted October 31, 2013 Report Posted October 31, 2013 Are you talking about the stainless wire that is used to tie the mag plug, oil drain plug, and oil filter? The A&P that just did an oil change on my CTLSi and tied all three down. They are talking about the plastic ties that hold the airfilter in place on a CTSW. Your airplane has a different airfilter system.
Tom Baker Posted October 31, 2013 Report Posted October 31, 2013 The oil filter has wiring support on the end of the filer. Here is a picture. You need to ask the A&P if he is ready to cover warranty issues for your engine, because he just install an oilfilter that is not approved by Rotax.
Ed Cesnalis Posted October 31, 2013 Report Posted October 31, 2013 http://www.rotax-owner.com/pdf/SL-912-014-R3.pdf Looks like issues could be by-pass valve spring return valve
sandpiper Posted October 31, 2013 Report Posted October 31, 2013 Roger - actually the CPS/Spruce difference is $0.57 whereas the CPS/CPS difference is $0.52. Every penny counts Roger. Anyway, unless Lone Mountain knows something, I am surprised they would put a Tempest on a customers new plane. I wonder what their price to the customer is for the tempest. In the case of Spruce/Cps their price is Tempest $22.85 and Rotax $23.42. CPS wants another nickel for the Tempest. Plus shipping & handling of course.
sandpiper Posted October 31, 2013 Report Posted October 31, 2013 Roger - I agree. I was just wondering if the dealer knows something the rest of us don't. Also am curious what they get for putting on the wrong filter vs. a Rotax. Maybe they get a better break on Tempest but don't pass it on to the customer. As for the cost difference, I was just attempting some humor.
FlyingMonkey Posted October 31, 2013 Report Posted October 31, 2013 Maybe the owner specified what filter he wanted used...
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