08-26-2016, 06:32 PM | #1 |
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Dyno Tested: New RK Autowerks CF Cold Air Intakes
Hey guys,
I had these installed on my car and tested on the dyno. The car had an ECU Tune done by Powerhaus Performance, NJ with Catless downpipes. I was very pleased with the quality of the intakes. The weave and finish are very high end and there is zero fiberglass used in the construction. Installation is definiately DIY with a few basic hand tools. It takes about 1.5 hours. These are also made in the USA. I'll support a USA made product any day :thump: Bang for the buck I think these are the best intakes on the market. Against the stock air box with the charcoal filters in the RK Intakes picked up 38 whp. The car was also ran without the charcoal filters and the RK Intakes showed a 16 whp gain over that setup. I feel that these intakes at speed on the highway will have a clear advantage over the stock setup. Real world airflow just can't be replicated on the dyno so the potential for gains are even greater. Here are some pictures! Last edited by MSIXCARBON; 08-27-2016 at 10:16 PM.. |
08-26-2016, 07:12 PM | #2 |
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Thank you thank you for this post! I was just about to sign up and post a question on m5board about this intake. For whatever behind-the-scene reasons, RK is off this forum. I just picked up this intake and you've answered all of my questions
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08-27-2016, 10:50 AM | #4 |
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As of now they are going for $1850. The quality looks to be very good. I'm gonna re-visit the idea of picking up a set once my warranty expires.
Last edited by Mkai0; 08-27-2016 at 10:50 AM.. Reason: Correction |
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08-27-2016, 12:16 PM | #6 | |
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True there are no velocity stacks, and the filters are just K&N #RF-1031. I remember the developer saying velocity stacks werent needed, but again, that thread is gone. In terms of water in that area, I wonder how MSR deals with that? |
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08-27-2016, 01:53 PM | #7 |
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These are not a copy. The threads were probably removed because they aren't a supporting vendor.
As far as flow these are CFD Tested and designed by an engineer that has worked for the OEM in a mutimillion dollar dyno cell where stringent testing would make conventional dyno testing laughable. |
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08-27-2016, 01:57 PM | #8 | |
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08-27-2016, 02:27 PM | #9 | |
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As for filter, water never damages filters on the MSR intake, stainless steel mesh. There is never water issues. |
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08-27-2016, 02:49 PM | #10 | |
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08-27-2016, 03:43 PM | #12 |
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MSR intakes have a 3.0"'inlet, these have a 3.5" inlet. That alone is a huge difference, 27% less surface area for air to be sucked in. The filters are washable so water is not gong to ruin them. I believe the MSR are metal and much smaller surface area on the filter itself. I personally value the intakes being carbon fiber from a performance standpoint, less heat soak, form fit yielding 100% optimization. When I installed them you could see the subtle design needs implemented to fit the intakes easily.
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08-27-2016, 04:07 PM | #13 | |
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Just because a product looks good on paper, calculated numbers ect, doesn't always mean the end results will be as promising. The MSR intake on a stock M5 on a Dyno before and after only showed 20-30whp midrange and 10-12 peak but vbox showed .5 seconds faster 60-130 mph. On a fully Moded M6 the MSR intake showed 30-40 whp midrange on the the Dyno proving the more mods the more gains because of its overall efficiency On a fully Moded M5 at the track that was running 12.1-12.2 @ 120 mph with 2.0 60ft and a best 12.0@120mph, after installing MSR intake and two weeks of adaptation it dropped its time by 11.5-11.6@124-125 mph same 60ft of 2.0. All this data is documented and anyone that wants to see it they are welcome. Just adding big filters in the front of the kidneys dosent mean you'll get the same gains on the street as the MSR intake that has been setup for a reason and proven over and over again around the globe. But I can say the carbon fiber does look good! Last edited by m6beast; 08-27-2016 at 04:13 PM.. |
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gary_F10M51.50 m5james432.00 |
08-27-2016, 04:57 PM | #16 |
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Hold on I’m confused now, if everything was done for a reason, then why would you reduce the pipe from 3.5 to 3.25? The OEM inlet is 3.5. That doesn’t add up to me, I also recall reading when you were “developing” these intakes that you had Maf codes. You can see the RK section is an exact replica of the OEM maf section, down to the curvature.
Do you have flow bench numbers for your intakes? RK Autowerks has provided flow bench numbers for their product, OEM, charcoal, and your product. That is not calculated data, that is real life testing. We can debate your track numbers all day. But going to the track one day, then 2 weeks later, doesn’t mean anything. Your intake temps changing are more significant than the intakes at that point. Don’t get me wrong, nobody is doubting your intakes make power, but how much is the question here. I feel the guys at RK being aerospace engineers might know a thing or too. I spoke to the owner and he has heavy experience in the automotive industry working for the OEMs. You yourself must know that the car does not need 2 weeks to adapt, that is unreasonable. Even then, intakes do not effect anything in terms of “adaptations.” Intakes are simply a restriction on the system which the car has to endure as the RK owner explained in his engineering paper. You should be able to put the intakes on the car and instantly see power. This is proven and the engineering backs it up. I saw this on the dyno myself, I did not need 2 weeks of driving around. Sounds like the guys at RK made a product that looks good on paper, calculated numbers, validated numbers via CFD, validated numbers via flow benching, validated via dyno testing; resulting in a great product. I understand you have track times, but you can’t argue that a flow bench does not hold more value when developing intakes. You eliminate all the variables, temperature, humidity, the entire vehicle engine, and so on. If the argument was for a naturally aspirated car, I can understand that. But this is a turbo vehicle where reducing restriction is the name of the game. |
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08-27-2016, 05:18 PM | #18 | |
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As far as adaptation, we all know these cars take some time to adapt. Whether it's 1 day or two weeks, every Bmw has reacted differently and if you reset adaptations as I did then it can take up to two weeks. I can tell you from experience as others will also comment on, each day after install the car felt different. If that's not called adaptation, then please help explain what that means. This isn't MSR Vs RK, again, both beautiful designs and so far proven gains. We all know MSR came out with the concept and everyone has followed with their changes to improve it. Bravo to them. Those filters btw, will be soaken wet when it rains. I already have a buddy with these intakes and he experienced that already. Same issue with M PsI filters.
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*** SOLD *** 2013 BMW M5 | Space Grey | MSR Stage 3 Tune | Catless Downpipes | MSR Intake and Charge Pipes | MSR Exhaust (Prototype) | Vorsteiner Rear Diffuser | RW Carbon Front Lip | RW Carbon Trunk Spoiler| Vorsteiner VS-310 Forged Wheels | Escort 9500CI w/Laser Jammers
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08-27-2016, 05:21 PM | #19 | |
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And as for two weeks adaptation you are correct for the rk design doesn't need it because of efficiency where as the MSR intake is of compressed air design which is totally different. The reason it takes two weeks is because the car has to learn the new flow characteristics because of its higher volume and velocity of air by mph and what happens is the dmes close the throttle to protect it from runing too lean. As time passes they add more fuel and open the throttle more and more each day which the end result making more power. You wouldn't know this because your flow bench isn't gonna tell you. Reall live data on the street and logging while recording every test in performance is key to a well designed product. I've done my testing in every way and I'm not the one that's here trying to compare intakes you guys brought me into this. Anyone can copy someone else's design and try and make it better, as for my design it's been proven not by just me but by several customers and they can all tell you the two weeks adaptation is as real as it gets. The fully modded M5 that I told you about that dropped his times by .5 seconds and gained 4-5 mph actually couldn't wait for two weeks and the track numbers also proved adaptation is real I installed his intake on a Friday and I told him it needed two weeks, he had no patience and went to the track that following wed. From his best 12.0 @120 mph he ran 11.7@121 mph. I told him to go the following week and he would see a big difference. So he went the following wed and ran 11.5-11.6 @124/125 mph consistently. I design my own products of my own cars and they go through every kind of testing and logging. I'm not a company taking a customers car and making a product but someone that wants the best performance possible for years always been my goal from the time I could drive. So you can talk about flow testing data ect that doesn't mean your gonna perform as well as you think. I suggest take the rk intake and run it against an MSR intake stock cars and run them, you will see the difference. |
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08-27-2016, 05:38 PM | #21 |
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M6beast,
Can you please explain this "compressed air design" as I have never heard of that terminology. Also, can you post our testing data. I would love to see it. Thanks. |
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08-27-2016, 05:42 PM | #22 | |
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I'm sure RK sells socks to put over like MaxPsI does
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*** SOLD *** 2013 BMW M5 | Space Grey | MSR Stage 3 Tune | Catless Downpipes | MSR Intake and Charge Pipes | MSR Exhaust (Prototype) | Vorsteiner Rear Diffuser | RW Carbon Front Lip | RW Carbon Trunk Spoiler| Vorsteiner VS-310 Forged Wheels | Escort 9500CI w/Laser Jammers
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