Anyone have experience with the RR Racing Air/Oil Separator
#256
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I did some detective work tonight and discovered something very interesting. The IS F and RC F have the same ring end gap specs through all model years available on TIS. The GS F has different, and much tighter specs from 2016 to present. See attachments. Now - does the GS F's tighter spec eliminate the need for a catch can? It surely might. For the not so faint of heart, it might make sense to retrofit GS F pistons and rings into an IS F block for more power (only a tiny bit) and for less blowby (maybe a lot). Notice the standard gap on the oil control ring is HALF what the IS F and RC F specify. That's very significant for oil control!
#257
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I once put together a Honda 500 single with a big bore kit from Wiseco (I call them Seizeco from my experience) and the piston fit was perfect, but the rings were way too loose. I told the owner, and he said there's nothing we can do about it, so we'll just have to run it. I was really unimpressed. I normally like to buy oversize rings and trim them for the gaps I want based on intended use just to avoid BS like this.
I really suspect Toyota went soft on the ring specs expecting their OEM AOS would be sufficient along with catalytic converters. I have my doubts about this being a good engineering decision.
#259
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#262
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I was thinking of sending him some to see what kind of numbers it produces. He says he gets requests all the time, so why not? If it equals or is better than M1, I'll switch in a second.
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Leander311 (11-27-17)
#264
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I haven't ordered it yet. Need to find out how much the guy needs first.
#266
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I posted a request in the blog today. He has instructions for sending oils to be tested, so I'm just confirming he'll be able to take on the work at some point.
#268
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He responded to my post. He did say his testing queue is full for now until February.
Last edited by lobuxracer; 12-05-17 at 01:04 PM.
#269
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For those that haven't seen this issue or haven't heard of it... I've seen in in my car in person. The issue isn't when running it hard, it's running it hard and then either going to idle or shutting it down afterward. I had this happen at Autocross, but not at a track session. The track you usually have a cool down lap which will eliminate the intake oil. At autocross you run it real hard then go to the pits. I've found that after you run hard you need to take a lap around the pits. Idling will not help a whole lot. moving and getting above 1500 rpm helps more. It seems when running as hard as she can then suddenly stopping you have an influx of oil in the intake... I think I'm going to go for the separator myself due to having seen the issue in person.