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Review Z1 CAI for G37S Coupe

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Review Z1 CAI for G37S Coupe

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Old 11-04-2018, 03:23 PM
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FAULKENSTEIN
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Z1 CAI for G37S Coupe

I just wanted to share my experience so far with the Z1 cold air intake, which has been amazing for about 3k miles and going on my car. Just for info, my car was a bone stock 2013 G37S 6MT coupe prior to the intake. I've always been a happy customer and supporter of anything Z1, and this intake doesn't lack in quality and I'd definitely recommend it if you're considering pulling the trigger. I had thought about the Takeda and Stillen Gen 3 intakes but decided on the Z1 kit mainly because of the no cutting required and also because, well, it's Z1.

Install:
The install was super easy and only takes a couple hours, just follow the very well written and clear directions Z1 provides on the website (I'll add a link to the intake page with directions below), and also be sure to use or go buy some silicone spray if you don't have any, I can't say that enough lol. I made it 10x harder for myself because I didn't feel like waiting until a store opened the next day that had some but still a really simple install none the less. You don't need to remove the front bumper at all either, there's plenty of room in front of the radiator to get everything installed easily. The only issue at all that I had was after the install I noticed some slight rubbing on the driver's side intake tube, where it was rubbing against the engine bay and causing a slight rattling noise at certain times. I just adjusted the piping a little and have it a few mm off of the engine bay now and it's been fine since then and doesn't look like it's rubbed anymore. There are some pics of it attached. I also did an ECU reset after, but won't be doing a tune until it's time for an exhaust.

Thoughts:
Money very well spent. I couldn't stand the pedal lag with the stock air boxes, and this definitely fixes that and feels like there's been a small power gain from butt dyno tests, lol. The sound from it opening up the engine air flow a little is much better and significantly more noticeable than stock on my car too. You can definitely hear the intakes also if people are wondering that. It might not be as loud as a short ram intake but it's definitely noticeable especially at certain rpm's. I have also driven in several rain storms and not had a single issue with water intake. I wash my car like normal still also, just don't be a moron and spray water directly into the grill and intakes. I do wish Z1 would make a hydro shield for their custom sized air filters, but I'm planning on upgrading to the nicer filters they offer anyways so I can purchase some hydro shields then since they seem to be a more standard size and shape, similar to (if it's not) a JWT pop-charger filter like I used to have in my G35 I attached a few pictures from after the install which I hope helps anyone who was as curious as I was. Excuse the missing Infiniti emblem haha, it got lost in my recent move after it fell off during the install, so I'll get a replacement at some point.

I've also always been curious as to how much air flow is lost due to the small factory intake holes in the radiator support, so I'm thinking about taking it all apart and trimming that down and smoothing the edges to allow it to fit without and constriction through the intake holes. If you have any thoughts or words of wisdom on that, please chime in, or if you've done it yourself already I'm really curious to know if it's made any difference. I'll be sure to post an updated review when I attach the high flow air filters, and am ordering some Tein's for black friday (either the Basis Z or Flex Z, leaning more toward the basis but that's another post) so I'll be posting more soon

Here's a link to the Z1 intake with directions on their webpage: https://www.z1motorsports.com/air-in...it-p-8892.html







Last edited by FAULKENSTEIN; 11-05-2018 at 03:41 PM.
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Julian O. (11-08-2018)
Old 11-06-2018, 03:10 PM
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Damn if I didn't live in Commifornia, I would definitively do it. I like what you did to your grill. I guess there is enough room to mount the air filters, how easy would they be to clean? My car goes for my first smog check in Feb. I have had the car since Nov 2016. At least they gave me that amount of time to be free.
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Old 11-06-2018, 10:45 PM
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Originally Posted by ezbme View Post
Damn if I didn't live in Commifornia, I would definitively do it. I like what you did to your grill. I guess there is enough room to mount the air filters, how easy would they be to clean? My car goes for my first smog check in Feb. I have had the car since Nov 2016. At least they gave me that amount of time to be free.
Yeah it’s a bummer they aren’t CARB approved yet but hopefully soon for everyone out west. They definitely seem easy enough to clean and remove though to get around that temporarily for a test. Just pop off the radiator top cover and you can unscrew the clamps that hold the intakes onto the silicone tubing, and you can pull the filters off. I’ll be taking them off to upgrade to the nicer filters after ab 5k miles on the original filters, and will post an update (with pics) then with how the originals have held up and how clean they are. And thanks, it came with that grille when I bought it thankfully, but I think it’s just the factory option midnight black grille.
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Old 11-07-2018, 12:27 PM
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CARB is such BS, pay them 200k and they give you a sticker. Thanks liberals.
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Old 11-08-2018, 08:55 AM
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Thanks for the review and pictures! Very well put together. The black tubing looks great.

I plan to pull the trigger on these with the "pop charger' filter upgrade when the price comes down (hopefully under $500) on Black Friday. Having installed them without pulling the bumper, do you think that the larger filters would go in the same way? Also, when passing the silicone tubes through the air box holes, were the tubes deformed significantly? Do you think the factory holes are restricting a good bit of air flow?

I wonder if Z1 has dynoed the intake before and after cutting the core support. I'd also be interested in knowing how much was lost (if any) by not opening up the intake holes.
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Old 11-09-2018, 01:41 PM
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Originally Posted by Julian O. View Post
Thanks for the review and pictures! Very well put together. The black tubing looks great.

I plan to pull the trigger on these with the "pop charger' filter upgrade when the price comes down (hopefully under $500) on Black Friday. Having installed them without pulling the bumper, do you think that the larger filters would go in the same way? Also, when passing the silicone tubes through the air box holes, were the tubes deformed significantly? Do you think the factory holes are restricting a good bit of air flow?

I wonder if Z1 has dynoed the intake before and after cutting the core support. I'd also be interested in knowing how much was lost (if any) by not opening up the intake holes.
Thanks man! Yeah honestly I wish I would've just done the upgraded filter combo in the first place since it's a lot cheaper than buying the filters separately like I'm going to now. I'm with you there on waiting for the black Friday deals too, I'm waiting for some Tein Flex z's to go on sale...I do think the upgraded filters will still be able to fit in front of the radiator without having to pull the bumper though. There was plenty of room left when I was putting in the filters, I saw a couple posts where people had somehow damaged their filters and wasn't quite sure how they managed that with how much space there is for the install. As far as the silicone tubes bending through the factory air inlets, I was a little curious myself but the tubes form perfectly to the shape of the factory intakes where they elbow in through the radiator support. I'm going to reach out to Z1 today to get their honest opinion on if the radiator support should be cut/rounded out but they said it was fine as-is in everything I'd read from them. I'll share whatever info they send me, and hope that helps - I'll definitely snag the upgraded filters if they are on sale for black friday too, and will post an install update asap when I get them.
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Old 11-09-2018, 05:16 PM
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I heard back from Z1 already (great customer support always) and they recommended NOT to modify the radiator support which was nice to hear. Hope that helps anyone else curious to know.
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Old 11-09-2018, 07:29 PM
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Thank you for the detailed reply. If Z1 doesn't recommend any cutting and you think the larger filters would fit with the bumper attached, I may save $300 and do the install myself. I put in my post-mafs and drop-ins, and that was a fun, fairly easy DIY. I can't imagine the CAI would be much more difficult, especially if it doesn't require any cutting, or pulling the bumper.

I'll probably give Z1 a call and see if they have any dyno numbers with and without the cut core support. My last dyno numbers were fairly low (308/257), and with ported plenums, HFCs, and a custom y-pipe, I think the stock air boxes are my primary flow restriction. I'm hoping for 320-330 wheel on the re-tune, so I'd probably have them cut the core support if that bottleneck lost more than about 5 whp.
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Old 11-10-2018, 01:03 AM
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Originally Posted by Julian O. View Post
Thank you for the detailed reply. If Z1 doesn't recommend any cutting and you think the larger filters would fit with the bumper attached, I may save $300 and do the install myself. I put in my post-mafs and drop-ins, and that was a fun, fairly easy DIY. I can't imagine the CAI would be much more difficult, especially if it doesn't require any cutting, or pulling the bumper.

I'll probably give Z1 a call and see if they have any dyno numbers with and without the cut core support. My last dyno numbers were fairly low (308/257), and with ported plenums, HFCs, and a custom y-pipe, I think the stock air boxes are my primary flow restriction. I'm hoping for 320-330 wheel on the re-tune, so I'd probably have them cut the core support if that bottleneck lost more than about 5 whp.

I’d definitely do the install yourself and save the $$, since you’ve already done some work on it with the post mafs it should be really easy, not too much more than that. Just use silicone spray to get the elbows through the factory inlets and it’ll be a quick install after you pull the factory boxes. Also here’s a link to a DynoJet run from Z1 with the upgraded filters on a Stillen intake with mods similar to yours other than the headers. Looks like the upgraded filters do prove a gain, definitely over the gen 3’s included filter so I’d imagine with a tune you’d see a very decent gain over the stock boxes. I was a little surprised and happy to hear the Z1 techs recommend against cutting the radiator support so I won’t be doing that anymore when I install the upgraded filters. The less cutting the better I definitely think...for now lol...

https://www.z1motorsports.com/imageG...deDSHLarge.jpg

Last edited by FAULKENSTEIN; 11-11-2018 at 01:40 PM.
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Old 11-10-2018, 06:50 PM
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Thanks for the pics. They tell me I can't run a CAI because the filters would block and/or contact my oil and trans exchangers.
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Old 11-11-2018, 01:45 PM
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Originally Posted by slartibartfast View Post
Thanks for the pics. They tell me I can't run a CAI because the filters would block and/or contact my oil and trans exchangers.
Ahh thatís a bummer...I bet a lot if not all of the room up front is taken up with the oil and trans cooler. Which row oil cooler did you get from Z1? Depending on what engine/turbo setup I go with down the road, Iíll run the Z1 34 row oil cooler myself if I keep the VQ in the G and rebuild it. Iíve heard great things about it so far.
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Old 11-11-2018, 10:54 PM
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They're both bolted to the framework in front of the radiator. I suppose the filter mounts could be modified to push them forward...
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