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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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11-20-2012, 01:23 PM | #99 |
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No one seemed to answer why you would want to drain all that moisture, potentially burned oil, blow by gas back into the crank case and not just drain it? Namely if you care about performance. You certainly don't want it in the intake tract why would you want it back in the engine?
Frankly, Crawford has provided no technical details, virtually no transparency of the how or why his AOS is better than using a catch can, or open system. Which screams snake oil.
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11-20-2012, 01:27 PM | #100 | |
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This isn't a new product. It's been a very well proven product on the wrx/STIs. I personally have one on my sti and my wife's wrx. If you don't understand why not having to drain a catch can is better well the. Idk what to tell you John |
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The Following User Says Thank You to Visconti For This Useful Post: | Sensisnow (05-27-2013) |
11-20-2012, 02:22 PM | #101 | |
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Catch cans and AOS are nothing fancy but when you look at the contents of a catch, blow by gas/oil and the amount, why is it better to plumb it back into the engine than to drain it? Do you really want that back in the engine? If you don't want it back into the intake/manifold why would you want to route it back into the engine? I'd just like to see more factual/actual data than people saying it just works thats all Crawford's site says. Where is the UOA analysis of a tracked car with the AOS, where is the engine tear down showing motors with and without it? John if you just sold your tunes and said: "Plug it in, it works it's proven." Then not provide any additional technical information, are we just supposed to be like oh yeah sure?
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11-20-2012, 02:45 PM | #102 |
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I've had catch cans on previous cars. They never drained back into the engine or crankcase. That's the whole point, right? I don't want combustion tainted oil in my crankcase or my intake.
And $319.00! Yikes. |
11-20-2012, 03:38 PM | #103 | |
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That is one reason that I know of |
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11-20-2012, 11:58 PM | #104 | |
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From what I understand. Crawford got into it with the MOD over answering questions about the AOS without registering as a vendor. Even though he was not attempting to promote or sell the product just answer questions. The MOD also will not let you put a link to ********.com (brz_club). apparently, we are not allowed to share information or work together with other sites or people
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11-21-2012, 12:52 AM | #105 |
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I bought one anyway from a registered vendor of this site. Doesn't the blow by come from the engine? If it does, I can't see why it is an issue to route it back in...
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11-21-2012, 09:38 AM | #106 | |
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First off I am not pretending to be an expert just looking for facts: http://www.bobistheoilguy.com/blowby.html The entire concept of the AOS is to filter the air and oil and drain it back into the crank case. A quality catch can will actual collect the oil from the blow by gas and feed the rest of the gas back into the intake. So the issue I am raising with Crawfords AOS is that it is collecting blow by gasses and oil that is contaminated from blow by and putting it back into the crank case which technically according to conventional wisdom is bad for your clean oil. How exactly is this a good practice? It is the most basic question not once answered on any forum I have asked about it. Which is why until I got an answer would I never dump the money into this product.
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11-21-2012, 11:07 AM | #107 | ||
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http://www.iwsti.com/forums/2-5-lite...-answered.html |
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11-21-2012, 03:14 PM | #108 | |
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Lots of stock engines use air/oil separators which drain back into the engine. Industrial machines, Porsche/BMW use them pretty extensively, aircraft, etc. Generally the blow-by isn't full of too many contaminants, it's just oil vapor so once you remove the air what's left over isn't necessarily very contaminated unless there are other problems with the engine. I agree it would be good for someone to do an oil analysis of what's in a catch can but lots of times water also condenses in those things which creates the sludge. |
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