Dyno Results: G37 Stock vs KN Panel Filter - Motorvate's Garage Ep. 1 

Hey Mick, Thank you! Please keep in mind, different cars/engines will get different gains. The VQ37VHR engine in the G37/370 sure seems to respond well to a K&N filter.

Yeah, the gain for my 2.0l NA will be negligible. But the roarrr is worth the price :)

Hey Mick, Ahhhh yes the roar can be delightful!! On my 95 Maxima with a K&N cone filter it was wonderful! With the K&N panel filters, I don't hear anything :(

The K&N worked on my 93 240ZX. The VQ's don't respond well to mods though

Hey Stephen, Hmmm, that has not been my experience. My 95 Maxima (VQ30DE) picked up 14 HP with a y-pipe, 6 HP with a K&N cone and 5HP with a larger b-pipe. My G37 (VQ37VHR) also has done OK. The KA24DE (same as your 240ZX) in my 99 Altima is stock, but maybe I should try a K&N on that. What VQ engine/car didn't respond to mods and what were the mods? I am interested to know more...

Hey sk8punk318, Thanks for your comment. People think I am paid by K&N and have lied about the results. I do like K&N products, however I have only reported the data that I paid to collect (I purchased the filters used and paid for 2 hours of dyno time) I had planned to go back to the dyno for a retest in October/November but my work schedule didn't allow it. Now I am planning on the spring. This follow up test will include a NEW OEM filter, the used K&N and no filter. I think the results will be very interesting.

Motorvate DIY I used brand new paper filters (week old) and achieved the same results you did after replacing them with K&N drop-ins. I gained 13.36 HP It was 84 degrees here in Houston at the time.

Hey Bradly King, Thanks for posting this! It is nice to have two tests with similar results.

Buy aftermarket filters once or buy OEM filters multiple times when they're dirty. They can possibly pay for themselves while the car being quicker and better mpg's. I always buy dry filters due to the MAF.

@@a98ctr62 were the old filters filthy?

Yes, I was a little surprised... On my 95 Maxima a K&N cone filter with a Stillen velocity stack made 6 peak HP, and sounded fantastic at wide open throttle!

Motorvate DIY i drive a 12 cts coupe and they only sell a k&n thyphoon intake for this model but its an aluminum tube and the cone is not completely covered so im going to buy just the filter :)

Good decision!... and your gains may not be too far off the typhoon kit. PLUS your engine won't be sucking in HOT air from under the hood.

Motorvate DIY great video! Now i need to find one where they dyno a throttle body spacer hahah

Maybe you could be the first to dyno before and after?

Darksyne wow exactly what i was going to say 👍minus the part about the cat back

That is a clean new change.... Go 5000kms with the KN, the air sucking pulls oil off the KN filter and coats your MAF. making engine performance and gas mileage MUCH worse.

TheKodiak72 negative only if you over oil it. Besides modern maf sensors are covered not exposed like the 90s.

What most people don't understand, is that you will get a small boost in hp & torque. But where you really feel the gains is in throttle response! I have noticed in my FX 35's response was 2 times quicker than before I installed my K&N stage 2 CAI system. Improved a couple points in mpg as well. So the moral of the story with cold air intakes, is you get small/minuscule hp, torque & mpg gains, & dramatic throttle response gains! Add a performance mass air sensor, & a $600'ish high flow cat-back exhaust, & you will think you have a different engine under the hood.

Darksyne that's the opposite of how that works. Two filters means less flow needed per filter...therefore less of a difference.

Hey Tim de Groot, I agree with you, it is a great engine :)

Hey Xternal, Thanks for your kind words! I am enjoying my K&N's as well. PLUS I love my Stillen exhaust :)

I put a pair on mine shortly after buying it 5 years ago and I knew it was a difference I just never measured it. But they're so plentiful nowadays on the internet you can get a whole kit for a hundred bucks. And it looks so much better than stock. And I live in Florida with 11 month Summers and have yet to have a problem with the heat coming off my engine into the motor. Easily the best $100 mod for this motor.

Dude actually says "maybe just a placebo effect", after just watching the dyno proof.

any problems yet? i heard that it ruins the engine long teem

term*

The Raider 😀

2 weeks later, need new engine, due to dirt, bugs, & other shit gunking up your engine til it mutherfucking BLOWS!

Joel Williams but he had 2 weeks of fun! 😀

Joel Williams lmfao

Actually 0 bhp. Your car will stall if it sucks too much air. Common occurrence when you go to clean the system 😂😂

Hey Ford ST, I think you nailed it! Just for kicks I will be going back to the dyno to re-test just to double check my results. It should be very interesting.

Ford ST dude my filter was oily as hell.

Winston, thank you! I really enjoy analyzing data to uncover the information within.

Hey Mike Hilfigure, Glad to hear! I hope you enjoy your Q as much as I enjoy my G :)

EdDy4Rheelz... wow, that is a great idea. Thanks for sharing it!

Motorvate DIY Np. Thanks for showing the data. I use both but paper filter is only for temporary purpose. Data u showed + less hassle is the reason why kn is the way to go. Ppl make all these bs reasons to bash kn saying kn will destroy the engine. I used kn filter, my engine is almost 200k, not a single problem. I've maintained my car as optimal as possible. oil changing with quality synthetic oil, decent/good oil filter, flush out transmission fluid along with replacing spin on filter every time, replacing spark plugs to ngk laser iridium, bleeding and flushing brake fluids whenever I replace brake pads, changing cabin filter, flushing out coolant, but now, I bought kn cabin air filter yesterday. I am a proud kn filter owner. Stock products suck. Aftermarket quality products are the way to go. Your video and data proves my point.

I just bought 2 sets because I'm lazy

lmao or you just take an hour in the evening and do it...... #LOGIC

I do precisely that. Course I just have an old beater 2003 Saturn.

Hey Christopher Mott, We have the same experience, they work for us :)

Hey adrian castillo, I do find it hard to believe that was almost 4 years ago! AND those same air filters are still in my car and haven't been cleaned yet. Have a look at the 50,000 KM update from last year: K&N Filter Test… Two Years and 50,000 KM Later: Motorvate's DIY Garage Ep.34 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7D9lJxQ1s-U.html

@@MotorvateDIY thats awesome! Definitely my next purchase👍🤙

Hey hectoronthemoon, Thanks for your kind words. Since I am learning Adobe After Effects that gray only took 3 days to organize the data and animate. All just for you :)

I feel the same... It isn't a lot, but it is a little different in a nice way :)

Hey NightHawl0077, I hope your gains are the same as mine.... Nissan's VQ engines really seem to respond well to intake/exhaust mods. Good luck!

I beg to differ Motorvate..I got rid of my G37 as did my son with his 350Z. Mods did next to nothing for these cars and it's documented on myg37.com. I traded the G37 and picked up an 06 C6 Corvette and have never regretted it even after the lifter sand cam went south.

Hey Stephen, That's interesting... I am all over myg37.com everyday and haven't seen any posts where people did an intake and exhaust and didn't measure a gain. I have no first hand knowledge on the 350Z, so I can't comment on that. Would I trade in my G37 for a C6??? In about 2 heart beats, however I still need 4 doors for a while. Enjoy your C6!

Did you see any gains? I just bought a 08 g35s, Thinking about a CAI, or just the K&N filters... I hear mix reviews on the CAI.

@@stephenr9194 Sir you're comparing a $5 000 G37 to a $25 000 corvette.......... of course you would rather have the vette, so would anyone else!!

Hey Guivensthecar guy, Thanks! Once the funds are in place, I will be going back to the dyno for a re-test. BUT this time using brand new Infiniti filters, used K&N and even no air filter. It should be interesting seeing what the data shows!

@@MotorvateDIY alright

Phil, thank you!! The problem I have with getting a tune is the cost!! It would be about $800 Canadian for maybe 10-15 HP. That $800 dollars gets me closer to a new 4K camera :)

Thanks for your comment. As for power gains, it really depends on the design of the intake and engine. For the engine in the G37/370, it does like to breathe deep and anything to help that does make more power.

Hey DoomFinger511, BUT, if you do that, then everyone will know and no one will want to race you :)

Thanks! From what I have seen, not all engines respond this well to a K&N. BUT I'm glad it did in my G37 :)

Yes that would be interesting and could be made into a 3 way comparison (paper, K&N panel and Takeda) Unfortunate, my budget for this year won't allow it. :(

Motorvate DIY i already car shop machine dyno compared k&n vs stock. so i already knew k&n made more power on same day dyno few minutes apart. also my butt dyno, cold air intake made more top rpm torque vs k&n short intake which made more torque @ lower rpm.

Interesting... That's good to know, thanks for sharing!

I understand what you are saying about how easy it is to see through the K&N filter, it does look like it is full of holes! As for the ability to filter the air, I will be getting my used oil analyzed this will and will have a look at the results. (typically silicon (sand) is high (> 30 parts per million) if the filter is not working well. I hope to change my oil this week and take in a sample. I had a K&N cone filter on my 99 Maxima for just over 300,000 Km it didn't have an issue. I suspect newer cars might have more sensitive air flow meters.

I've had a K&N filter on my 2000 Nissan Maxima for 16 years, up until last year. I had a Blackstone oil analysis done and my silica levels were in the 100's. I changed back to paper recently, in the past 6 months, and will do another oil analysis to see if the silica drops, which I think it will. I don't think it's adversely affected my car, although I did have to replace my mass air flow sensor like constatbuzz above. I have since, in the last 2 weeks, given my Maxima to my 15 year old son and purchased myself a 2013 G37xS. I'm ecstatic...

Wow, 100 PPM iv VERY high for silica! (sand). The next episode (March 3) I will be showing my used oil analysis of 6 months with a paper filter vs 6 months with the K&N.

Sorry, I miss spoke about the silica levels. The number is actually 26, with 14 being the average so they are still high. I was trying to figure out how I could post my report but haven't been able to just yet.

Those are much better silica numbers. It is my understanding anything under 30 parts per million (ppm) is OK. It will be interesting to compare my 6 month used oil analysis with the K&N with yours.

Thanks for your comment! I do think they are worth it... and in a follow up episode (to be released in the summer) I will be re-testing the stock - vs used K&N - vs new K&N - vs used paper filter - vs NO AIR filter on a different (and more accurate) dyno :)

Hey Nick Amarit, That is where I messed up... I used the filter that came with the car when I bought it. However, I will be going back to the dyno with a brand new Infiniti air filter for a re-test. I will compare a clean K&N, dirty K&N, New Infiniti filter and a few runs without an air filter AND data log coolant & oil temps and a few others. Stay tuned for the update!

@@MotorvateDIY Use your standard filter the K N is not worth extra money you pay for them stay with what ever your make tells you to use ,And dont fall for the nitrogen in your tyres scam its big scam .

Hey goldwingman1500, I am comfortable with the K&N filters and have used them for over 30 years with a combined total "K&N filter" mileage somewhere around 500,000 KM on 5 different cars and 1 bike., without any issues. Have you had a failure of something due to a K&N filter? Don't forget, since the filters can be cleaned, they will save you money in the long run. The G37 uses 2 air filters and they are $30 each at the dealer or $25 for after market. Two K&N filters are about $120 US / $160 Canadian. After 3-4 years of use, the K&N filters are paid for and SAVE me money. As for nitrogen in the tires I get the "econo 78" nitrogen.... you know the 78% version :)

@@MotorvateDIY all air cleaners as lons as there clean stay with your normal Filter bugger K,N Filters are over priced and change you air cleaner oil filter and will have no trouble ( hope)

@@goldwingman1500 I've used K&N filters buddy. They are better than the cheap paper ones. And in the long run it's lower in cost.

We have the same experience... They work for us :)

Hey David Michael, Yup, that is how we say it in Toronto. :)

I like it. Knee-San

Thanks for subbing!

Hey BestOnlineGamer: Shhh, don't let everyone know I am from Canada, eh? :)

No harm in trying... and if you can do a used oil analysis you will know how well it is working for you :)

Hey Ali Ben Ashour, That was my mini tribute to Jeremy Clarkson. He would make a stupid voice like that when he would imitate "haters" talking. Thanks for noticing!

I'm just joking you're making good job 😂

It really depends on the design goals of the engine. On the 370z/G37 the engine makes peak power at 7,000 RPM so it is designed for high air flow. Anything to reduce intake restriction will result in less pumping loss, which makes more power.

Hey Kemal Keza, You just might be on to something here. BUT since my pockets are not a deep as yours :), I just need to be VERY careful when oiling them and spray less then you think you need.

I live by this. I throw out used ones no matter what! They are junk when used after 50,000 miles i wont lose sleep tossing it out

I still love mine :)

Hey Michael Mennes, Thanks for your kind words... and I agree cooler air does make more power.

Hey Dman 1990, Nope... it was sponsored by me.

Hmmmph… Dbag 1990 had to throw in his two cents to get his troll points.

Hey Brian Koncyk, Thanks... Now I just want to point out that not engines will respond the same way as this one. It depends on the design and if the engine computer (ECU) can take advantage of the additional air flow. In the case here, the VQ37VHR and the K&N work very well :)

@@MotorvateDIY Great job!

Thanks. In the next few days a new episode will be out showing how well the K&N filter is working after 2 years and 50,000 KM or 31,000 miles.

@@MotorvateDIY I will check it out. Thanks!

Nutjob Joe, I will do it if you do it :) Actually some cars loose power without an air filter, if they have mass air flow fuel injection. When the air box doesn't have a filter, the air turbulence is much greater and confuses the mass air flow sensor. As a result, it does not provide the correct signal to the ECU and the fueling is incorrect.

Nutjob Joe You'll also toast your engine. I'm a motorcycle mechanic and have seen first hand numerous times how dirt in your engine leads to failure. Use an air filter, unless you have more money than sense and can rebuild your engine whenever it shits the bed because of dirt in the combustion chambers.

Hey Jay Hale, Hmmm... I though comparing a slightly used filter to a freshly cleaned K&N wasn't an "apples to apples" test, BUT you raise a very good point! I am planning on going to a different dyno to retest. This time with a brand new Infiniti filter, used K&N, freshly cleaned K&N and just for kicks no filter at all. I hope to get to the dyno in January. Thanks for your comment :)

Thanks for the comments... I like them and still have the in the car.

@@MotorvateDIY if you ever have the time or money, maybe doing something with the silicone intake tubing, that would be great! Love the video man. Lots of clean information

Hey tbbsrr, Thanks! I am planning on going back for a re-test. This time comparing brand new Infiniti filters, dirty K&N, clean K&N and no filter at all. It should be very interesting!

In many cases, the stock intake is well designed for air flow and designed to handle heavy rains. When I see a cone filter behind the grill, I honestly worry about what can happen in heavy rain to that engine.

Hey lazy1972, They should work well... Cleaning the throttle body is a very good idea. Actually that is an episode that is in post production right now and should be posted in the next few weeks. Make sure you do the three procedures that the factory manual tells you to do. They are easy and prevents a high idle.

Hey cxbra, I'm glad it worked for you.... but cutting a hole in the bumper is a little to extreme for this old guy :)

Ummm.... A 250cc motorcycle engine has very little in common with a 3696cc car engine. Let me know how it feels to you.

Hey Asad S, Thanks for your comment. Please keep in mind that every car/engine will respond differently, but in the example of the G37/370z the engine responds well :)

Even the engine has a nice tune to it now lol . I'm getting one for my 3100 V6 Malibu .

Thanks for the summary :)

One thing I didn't mention in the video is the cost savings of the K&N filters. Two K&N filters cost about $120, and since they can be cleaned and re-oiled, they will last 10+ years. Two paper filters are about $40. The K&N filters are paid for after three paper air filter replacements. ($40 x 3 = $120, the same cost of the K&N filters) Thank you for kind comments on the quality, I am glad you noticed. :)

Bill Irish I bought them after i saw this video, put it this way if you want more power buy them

Thanks for your kind words!

Hey Randy Green, Thanks! I am looking forward to the re-test in the late spring to see if there are any differences.

Hey Thai Gyro, Thanks for you comment. Have you done any testing with the newer "dry" style filters? As you know, many people are worried about the oil in the filter hurting the MAF sensor.

Not specifically for MAF failure testing. In the past, we have seen tests results from K&N and a few others. We believe that the conclusions clearly show no failures due to K&N oil contamination. Urban legend is not an accepted form of data, for us. When we do expensive testing, like dyno runs, we ensure proper sequences to avoid speculation. We prefer oiled cotton, like K&N over dry. Both can work fine, but we do a lot of dual sport and motard bike engines, so get into dusty conditions, where the oiled cotton, we believe, protects better. Never experienced a MAF sensor failure due to filter type...most sensors fail due to design style or simply manufacturing defects. Hot wire MAF's are delicate, but a good one will last many years, if the entire system is well maintained. The real contamination problem that we see, comes from either the PCV systems performance or the fuel tank vent/vapor system failures. Often, these use shared plumbing, adding to diagnosis complications.

Hey Thai Gyro, Thanks for sharing your first hand experience on this. I have had the same experience.

I agree, cleaning the K&N is a little bit of a pain. However, I have been doing that since my first K&N filter in my 88 Taurus.

Hey RoundHouseSlap, I'm glad you found it too :)

Hey rmp5s, Glad to help :) I will be going back to the dyno this spring for Part 2: K&N vs new Infiniti vs no air filters. I can't wait to see the data on this test!

Thanks for the comment. As I have found out, talking about K&N filters is a controversial topic and opinions are strong and very divided. All I wanted to do, is to show the results I got... and I have :)

Hey Bizzenn1976, My first K&N filter was in my 1986 Taurus and I have used them ever since.

Hey motmot welch, Thanks for your kind words :)

Hey gphillimo, I suspect the factory filter would do a better job of filtering in very dusty/dirty conditions. There is not much dust where I drive, so my used oil analysis shows that it is filtering well.

Hey Nawaf Alsarra, No problem. My first K&N filter was on my 83 VW GTi and I still use them today :)

Hey Mcufre, Every engine/ECU will respond differently. The G37's engine (VQ37VHR) has TWO air boxes/throttle bodies, has variable valve timing, variable valve LIFT and revs to 7,500 RPM. This engine is designed to breathe and so it responds very well. Other engines/ECUs may not be able to take full advantage of the "potential" additional air flow.

Hey Sonny Haskins, You are welcome. Just make sure not to over oil the filter when you clean it. K&N's website will tell you how much oil to use under "Product Specifications" For the G37 it is 0.61 oz or 18 ml per filter.

Hey Dylan H, Nice find! In late August, I went back to the dyno and did a re-test. I am still analyzing the data and hope to get the episode out later this month.

Hey fc8697syp, You are welcome and thank you for subscribing.

Hey JauntyBishop, Thanks for your kind words. I am planning on going to a different dyno and do a re-test. This time I will have brand new Infiniti air filters, used K&N, freshly cleaned K&N and just for kicks, a few dyno runs without an air filter.

@@MotorvateDIY also, would you be to test the Green Filter vs K&N? Seems like the Green Filter have gained a lot of recognition over the years. Be an interesting comparison since your test are completed with minimal variables, and accuracy is on point.

Hey JauntyBishop, Good idea, but when I went to their website, they don't have a filter for the 370Z/G37.

We have the same experience... My first K&N was for my 1986 Taurus and I have used them ever since. Good luck on the G37 purchase. Just make sure to check oil pressure to make sure the oil gallery gasket isn't leaking. At 80C/176F you should have > 14 psi. Anything less is a concern. Good luck!

Hey LS MS, As I see it, whenever the car feels faster, it is more fun to drive :) Thanks for the comment. :)

Hey TornadoCAN99, That would be a good test, but I don't know how I would ensure an equal amount of dirt would be ingested between the K&N and paper air filter.

Hey Joey McQuilkin, I have read good things about the AEM Dryflow. Maybe down the road I will get a set to test. As for the power gains, please keep in mind that every engine is different and has different designed goals. The engine in the G37, the VQ37VHR is designed to make maximum power at high RPM (7,100) so it requires lots of air. The lower restriction of the K&N allows a little more airflow and more power.

@@MotorvateDIY i have the AFE dry flows so id be interested to have a dyno comparison between them and the K&N

Hey Joe Smith, If someone would send me a pair, I would buy the dyno time and do a back to back test.

Hey Radijacija, I wish you luck on your hunt for more power! Thanks for subscribing :)

Thanks for the feedback... I noticed the same thing :)

Glad it was helpful!

Hey HybridNz, You are 100% correct! I have learned a lot since that video was shot (July 2016) When I re-test the filters (clean K&N, dirty K&N, new Infiniti filters and no filters) I will data log air intake temp, MAP, baro, TPS, injector pulse width, oil temp and a few others. I also built an air density calculator/data logger using an Arduino Uno and Bosch BME280 sensor to calculate the air density and density altitude during the test. (it also calculates J607 and J1349 correction factors. Also, I can data log the transmission and diff oil temp with another Arduino Uno and DS18B20 digital temp sensor. Can you think of anything else to data log?

Hey HybridNz, For Nissan/Infinti vehicles there are a few apps (Torque and OBD Fusion) that offer enhanced diagnostics and provides access to just over 200 manufacturer PIDs. That's how I datalog injector pulse width, engine oil temp, fuel temp, etc. This car has a factory wide band (air/fuel) sensor and I use that for data logging. At one dyno session I data logged the factory wide band and compared it to the tail pipe wide band. When I compared the ratios, the tail pipe wide band was just wrong! With WOT @ 3,500 it showed 14.0, the factory was as 12.0 Then is did a weird jump from 11.2 @ 5,000 RPM to 16.0 @ 5,500 then down to 9.5 @ 6,200. Maybe the shops sensor was messed up, or maybe the cat changed the oxygen level during the dyno run. I don't think you can trust an exhaust tip mounted wide band when the car has a catalytic convert.

Hey stormrider777, Thanks for your comment... we have had the same experience: They work and save money, since they can be cleaned over and over.

Hey Timothy Germann, Thanks for your comment. Based on my experience with my E39, I think the German cars have a better than normal intake system. and yes, they can be a pain to clean :)

Hey hugo salazar, Wow, those are very nice gains!

Thanks... I've used K&N since the 80s and they work well for me and are reusable.

Hey American Monster, Thanks for noticing :)

@@MotorvateDIY I work in an autobody shop and these type of videos pop up now and then but few as well done👍

It is easy to make a video.... it is very time consuming to make a good video. I think that episode was about 60 hours in editing, graphic creation and animation.

Please keep in mind, every vehicle will respond differently, so you won't get the same gain in a 1.0 Suzuki Swift :)

It was very much a noticeable difference in HP/Torque gain for me! I was very surprised and pleased to be able to feel as much difference as I did with this change! Amazing! I just hope it doesn't damage my engine in the long haul like get too much particles passing thru this air filter or the oil damaging my expensive engine sensors!

Hey MásAuto Mx, Very true, but you never really need extra HP when driving in city stop and go traffic. I wish I my car gave me similar fuel saving, but mine is about the same with or without

Motorvate DIY yeah I know! But in a standar transmission vehicule the trottle response with K&N is unestable all the time, the initial acceleration feels a high pull and inmediately goes down and it's going on up progressive, like a turbo lag sensation (obviously it's not turbo). Yeah, anyway K&N gives an agile sensation of driving but it's a response with pics and lows, and in the high acceleration the results are noticible. And with the normal filter the trottle is softer and smooth and stable from low rpm range. It's curious, what I do is to change the filters every month to have both sensations and don't get bored hahaha. :D

A month later, what do you think of them?

@@MotorvateDIY They perform great!

Hey Patrick Kudom, You may be right about the dyno... but I have just reported the numbers that it showed... However, I do plan on getting the car dynoed again at a different shop with a hub dyno. I will compare new K&N, used K&N, new Nissan filters, used Fram filters and no air filters. PLUS I will be monitoring differential oil and manual transmission oil temperature, and air intake differential pressure. It should be interesting! Thanks for your comment :)

Hey Haris Wadud, I'm glad you like them :)

Please keep in mind, different engines will respond differently. From my experience, most Nissan V6s will make more power with a K&N filer :)

I understand what you are saying... but that is what the dyno showed. As I found out later, the dyno is a "Land & Sea" inertia dyno, so it is very different in design and maybe calculations... Also, the car has a 6 speed manual, so that last 5% doesn't apply here. Good luck with your dyno and let me know how you make out.

Ummm if you look at the formula, HP and torque should always be equal at 5,252 RPM... I don't know what you are talking about.

Hey GalvatronTypeR, Very interesting. Is your UOA posted anywhere? I would like to have a look at the details... Here are my used oil analysis reports: (1) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-uvExyfxzsRo.html (2) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cU8UMlMzi30.html

Motorvate DIY I no longer have the car and I included the UOA reports with the service records to the new owner.

OK, thanks for getting back to me.

Hey karlt10, Thank you! Once the funds are in place, I will be going back to the dyno for a re-test. BUT this time using brand new Infiniti filters, used K&N and even no air filter. It should be interesting seeing what the data shows!

It all depends on how the ECU/PCM/DME is programmed and the design of the engine. The engine in the G37 is designed to make high RPM power at the expense of fuel economy. Thanks for your comment!

@@MotorvateDIY Was going to go CAI, but this is much cheaper and just as effective. I'll probably either get the ark or stillen exhaust to go along with it :)

Sounds like a good plan :)

I think so as well :)

Hey blackericdenice, That is very interesting... as a rough calculation, if you multiply peak HP * 1.6 that will give you the cubic feet per minute of air required for that horsepower. So, for the v8, 395 x 1.6 = 632 CFM. The K&N filter (33-2385) flows up to 783 CFM @ 1.5 inches of water column pressure. As a rough guess, it looks like the filter in the 3.3 v6 is oversized as the v6 only needs 464 CFM. All manufacturers like to reduce the number of different parts as much as possible. It looks like the 3.3 V6 has a V8 sized air filter, but that is only my guess.

Hey Vince Fernandez, Yup! The stock intake on the G37 is very well engineered. The air intake is in front of the the rad, just behind the front grill.

+Motorvate DIY AAAAAHHAAA!!! The Infiniti designers located the air intake in FRONT of the radiator ...THATS how you made more power!

Boy I sure am slow... I just figured out your post were "spoken" in my "hater" voice. Too funny!

Hey fwh79, The K&N filters do seem to work well on the G37 (or more specifically the VQ37VHR engine) In the late spring, I will be going back to the dyno for a re-test comparing a new Infiniti air filters, a K&N and just for kicks, NO AIR FILTER. I can't wait to see the results!

Should be interesting. I will be watching when that video drops!

If you don't think they work well, don't use them. On my 95 Maxima, I used K&N filters for about 12 years and when I sold the car, it had 398,000 Km on it, didn't burn any oil and ran fantastic. They work for me.

@@MotorvateDIY I know for a fact K&N filters do not work very well, back in 1991 I used one on a 460 ford until the first oil change, I did not like finding dirt in the intake post filter. after watching another video of yours I think it is pretty clear you are paid by K&N