Intake Intakes Intakes
04-13-2014, 03:04 PM
#276
After having a shitty K&N typhoon it was time to build a new intake. ive noticed that most of the intakes on the market for these cars dont use an air straightener, and alot of them have the vac lines too close to the maf sensor. here is my first prototype, i will be building a box and duct for the filter later this week, then ill test it out on the dyno. im already designing v2 with all the vac lines under the pipe hidden. Let me know what you guys think/ideas for improvement.
06-24-2014, 04:30 PM
#279
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Quick question for those who have had experience using either the AEM cold air intake, or the Inject SRI (SP model, with the heat shield). Which one is more beneficial for the RX-8; namely the rotary engine? Based on my research SRI should be avoided, because all it does is suck in more hot air from the engine bay, and had cases where the engine suffers from SRI than benefits from one. On the other hand, the Injen SP model does come with a heat shield, but I have not really read a review that has really shown and proven that this is a great addition to the intake system - thus a benefit to the rotary engine.
While the AEM cold air intake is pretty praised by most people. It is essentially the Mazdaspeed intake, but with the badge "AEM" on it instead. Also, the cold air that it sucks into the engine will greatly benefit the rotary engine, since it is already an engine that generally gets quick hot.
Anyways, just wanted a quick feedback on those who have had it installed on their car before, or experienced it before.
Thanks!
While the AEM cold air intake is pretty praised by most people. It is essentially the Mazdaspeed intake, but with the badge "AEM" on it instead. Also, the cold air that it sucks into the engine will greatly benefit the rotary engine, since it is already an engine that generally gets quick hot.
Anyways, just wanted a quick feedback on those who have had it installed on their car before, or experienced it before.
Thanks!
06-24-2014, 04:58 PM
#280
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The Mazdaspeed is actually and AEM(K&N) product. And yes, hot air intakes suck, especially on MAF based cars. But IMO all aftermarket intakes are a waste of money on the RX-8. You really should read this thread again.
06-25-2014, 09:03 AM
#281
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Anyways, just expressing my thoughts. What I like about forums is the ability to share my thoughts and have people respond, because I often won't think of things that other people have thought of, so it really help broaden my perspective.
06-25-2014, 10:14 AM
#283
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10-28-2014, 09:54 PM
#285
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Question....
There was a thread that stated K&N filters are not nearly as good as the OEM paper filter. There was a comment about losing engines due to the poor filtration of the K&N filter. The Racing Beat REVI Intake uses a K&N Filter. Does this mean that there will be an increased likelihood of particles in the engine with the Racing Beat Intake? Won't this lead to the SAME issues with a straight K&N Filter in the OEM box?
There was a thread that stated K&N filters are not nearly as good as the OEM paper filter. There was a comment about losing engines due to the poor filtration of the K&N filter. The Racing Beat REVI Intake uses a K&N Filter. Does this mean that there will be an increased likelihood of particles in the engine with the Racing Beat Intake? Won't this lead to the SAME issues with a straight K&N Filter in the OEM box?
10-28-2014, 10:45 PM
#286
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Essentially, yes. However most CAI kits come with a filter sock that does add another filter layer that does diminish this a bit. I am not sure if the RB one does, but obtaining one shouldn't be hard.
10-28-2014, 10:47 PM
#287
That's actually a good question. The filter insert is said to be "custom designed" for Racing Beat for the RX8, so it's possible that it uses a different element composition (which is backed up by the different color compared to "normal" K&N filters). Enough people use them that I'm willing to say that it won't pose a significant threat to your engine as long as you're not in extremely sandy conditions (near a beach or in a desert). Of course, I can't sure, as I am not an owner of that airbox, and most people don't have the ability to notice particulate damage in their engines.
Another option for you could be the factory airbox/filter combo with the REVi duct. They are compatible with each other and the stock box flows very well.
Another option for you could be the factory airbox/filter combo with the REVi duct. They are compatible with each other and the stock box flows very well.
10-29-2014, 10:35 AM
#288
AEM would be significantly better if the inlet was a 3.5 inch instead of a 3 inch. (Maf tube is 3.5) The issue is that you need to make an oval pipe instead of round where it passes through to the engine bay. Add a velocity stack, and point it forward and you have the best intake possible imo
Still the gains would not be that high to justify ...
I have aem myself right now but I'll prob sell for rb duct and put stock box back
10-29-2014, 01:50 PM
#290
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I sent an email to Racing Beat asking about their K&N Filter & particles in the engine.
Here is their response:
Here is their response:
I'm not sure where you gathered your information regarding the poor performance of the K&N filters (let me guess...the internet?), but if this is the case with K&N then it is likely the case with ANY aftermarket filter. K&N produces millions of filters every year and is without question the largest producer of aftermarket "upgrade" filters on the market. They have a stellar track record and an awesome tech team that invests heavily in research, testing and development. I know, I've personally worked with these guys on several of our intake applications. They've prepared a comprehensive FAQ page which addresses most of your concerns, see:
K&N Air Filter Facts You Should Know
I personally find the statements, "There are few areas more confusing than identifying dirt retention requirements when it comes to air filters. Most vehicle owner's manuals remain silent on the point. In fact, few air filter manufacturers publish any information as to the filtration efficiency of their filters.", to be particularly important. Without any specifications from the OE manufacturer regarding the stock filter, how are you to make a comparative evaluation between the stock filter and an aftermarket version??
With regards to your RX-8, we've sold 1000's of the REVi Intake kit without any reported issues. Granted, it would be very difficult to pinpoint an apex seal fail due to long term exposure to fine dust particles in the intake air flow. BTW, the K&N filters use a wet coating (oil) to aid in the filtration process.
I hope this helps, let me know if you have any other questions.
http://www.racingbeat.com/RX8/Intake...ers/18299.html
K&N Air Filter Facts You Should Know
I personally find the statements, "There are few areas more confusing than identifying dirt retention requirements when it comes to air filters. Most vehicle owner's manuals remain silent on the point. In fact, few air filter manufacturers publish any information as to the filtration efficiency of their filters.", to be particularly important. Without any specifications from the OE manufacturer regarding the stock filter, how are you to make a comparative evaluation between the stock filter and an aftermarket version??
With regards to your RX-8, we've sold 1000's of the REVi Intake kit without any reported issues. Granted, it would be very difficult to pinpoint an apex seal fail due to long term exposure to fine dust particles in the intake air flow. BTW, the K&N filters use a wet coating (oil) to aid in the filtration process.
I hope this helps, let me know if you have any other questions.
http://www.racingbeat.com/RX8/Intake...ers/18299.html
10-29-2014, 02:00 PM
#291
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What else would they say?
There are a ton of controlled air filter tests out there and there is no question that a typical OEM style paper (not really paper) filter (OEM, Wix, etc.) will prevent much more dirt from entering the engine than a K&N (any type). More dirt in an engine is bad, period. Especially if you live in a sandy environment. And it will gum up you intake valves, vacuum actuators, etc, etc. If a K&N is better than why did Speedsource and others switch to a OEM style paper filter on the NA 20B powered rolex GT cars?
There are a ton of controlled air filter tests out there and there is no question that a typical OEM style paper (not really paper) filter (OEM, Wix, etc.) will prevent much more dirt from entering the engine than a K&N (any type). More dirt in an engine is bad, period. Especially if you live in a sandy environment. And it will gum up you intake valves, vacuum actuators, etc, etc. If a K&N is better than why did Speedsource and others switch to a OEM style paper filter on the NA 20B powered rolex GT cars?
Last edited by 9krpmrx8; 10-29-2014 at 02:03 PM.
10-29-2014, 02:01 PM
#292
^I'm sure it will work fine, but there's no arguing that standard K&N filters pass through more fine particulates than their paper counterparts, I'm sure you've read some of the hard data that exists online. There's no reason to be concerned about it really, unless you routinely drive through walls of 15 mile deep dust not much will make it through any filter.
9k, is that big fan to keep IATs down??? I might try it someday
9k, is that big fan to keep IATs down??? I might try it someday
10-29-2014, 04:54 PM
#297
