Hey guys, wanted to run something by you.
I was just getting around to installing my HPS MAF Tubes this weekend and noticed that the stock corregated drivers side tube has a small tube protruding downward as well as one protuding out the side (toward the engine).. The HPS tube only has the small tube protruding out the side (toward the engine).
Is anyone elses like this? I have a 2011 touring coupe.
Any thoughts?

So the stock small tube that is directly on the bottom of the stock tube is connected to what looks like a small plastic baffle and stops there.?.? Is this new to 2011 Zs?
I guess that this chamber/baffle gets eliminated with the HPS install.?

any pics of this?

I haven't installed mine yet, but that sounds like a resonator. The HPS tube will no longer use that.

None yet... But would probably agree it is some kind of resonator/air chamber.

Dan with We Sell Car Parts just sent me this. I believe it answers my questions. Thanks Dan!
Now my next question, why would there be a resonator on the drivers side and not the passenger side. Thoughts?

http://www.the370z.com/members/cb1-a...ck-vs-hps.html

Yes, this was talked about way earlier in the thread. Its on all the models and years of the 370. its a resonator of some sort. No need to worry about it...

Thanks!

Just a heads up for those not interested in a black tube - HPS is now manufacturing these in blue as well.

Thanks!

I saw somewhere that with the tubes as well as the K&N filters our cars made 16 whp is that correct or on the high side that maybe one or two cars made? I'd much rather NOT take my front bumper off of my car. I know it's supposedly very easy, but I just don't want to do it, so i'm not going with the long tube intakes.

That number seems very high. Someone on here had the tubes with either the K&N or AFE Dry flow filters and I believe it was somewhere around 10 hp gain, which I feel is still on the high side. From what people have said, the combination of the tubes with filters would typically gain around 6 - 8 hp.
I think the main reason people get these is so they can avoid taking the bumper off, and for the gains you get, which are very close to CAI gains once other mods are added (exhaust...), they are so close that it doesn't warrant paying an additional $400 for the CAI...

Well if they ever produce them in RED, I'll swap mine out. Although I do love my HPS tubes, to me anyway, they don't add much to the engine bay appearance.

On a related note, I just got emailed my June(?) Mishimoto newsletter for some reason, and they have their own version of HPS/Cobb intake tubes.

Nissan 370z Silicone Air Intake Hose Kit, 2009-2011, by Mishimoto

As does Z1 Motorsports as well Z1 Silicone Post-MAF Intake Hoses

Interesting, I wasn't aware there are other companies out there that offer tubes like these except for the old Cobb ones. I wonder if the fitment on that passenger side is better than the HPS tubes? I also find it interesting that the Mishimoto ones talk about heat resistance. I wonder if they actually do since the HPS ones apparently don't help with that...

well it's what? Around 20 whp gain from the G3's? 10-14 hp is a pretty big jump... I agree however that it is quite expensive and taking the bumper off is just something i'm not interested in doing. Without seeing the G3... is there a way it can go on without removing the bumper?

No, but removing it is easy.

Great findings with the intake temp. Thanks for following up :tup:

yeah, it wasn't bad with my Evo X either honestly... but once it's off, it never seems to go back on quite the same.

We carry Mishimoto - red, black, and blue. All in stock.

WeSellCarParts.com - Nissan 370Z 2009-11 Mishimoto Air Intake Hose Kit Mishimoto MMHOSE-370Z-09AI

yea i have heard taking the bumper on and off will mess up fitment, but who knows.

I havent heard 20 whp from the g3's, more like 12-14 from what ive seen, and thats before other exhaust components are added. Once those are put on, i believe those numbers shrink...

Has anyone tried the Mishimoto intakes yet? I'm interested to see if the quality meets or exceeds the HPS. I might just pull the trigger anyway.

Just ordered the Mishimoto tubes in RED to replace my black HPS tubes that I've only had on for a month. Wanted them to match the rest of the red silicone hoses I have swapped out in my Niz. If anyone is interested in my black HPS tubes PM me and we can make a deal.

I wanted to do the same thing for the nismo. Post back about how the fitment is. Curious if the passenger side tube fits better... also what the quality is since they say they provide more heat resistance...

FYI. Z1 sells post MAF tubes in red, blue & black.

Yea i saw that, but thanks. To be honest, I wasnt thrilled with the HPS tubes but not sure if theres much of a difference between the other 2 options. So wont switch until i hear some feedback...

I have the mishimoto hoses in stock. Red, blue and black...

To the guys with the HPS tubes installed, did you notice any difference in sound? Is it as noticeable as a CAI?

sound is comparable to stock. the primary reason why i went this route. i dont like too much noise. :D

aside from color... why would anyone switch from one post maf tube type to another? Aside from spending more money they didn't need to... I can't believe it would possibly make any extra power.

Thanks for the continued purchases :)

The reason I was curious about the Mishimoto ones is because they claim to prevent against heat, and the others dont mention that. If that were true, id buy them even though i have the HPS tubes.... Still no evidence that they actually do help with heat...

Finally got around to installing these as well as new panel filters. Whole process took about 45 mins including removal of the strut bar.

They have been on the car for about a week now and there is noticeable increase in throttle response between 3k-5k rpm as well as a slightly louder intake volume/noise. The car does seem more eager to pull across most of the rpm range as well.

Just to make sure I wasn't suffering from a placebo effect and not making things up I switched cars for an afternoon with a fellow forum member (SolidKatfish) and the only difference between our cars are the intake and filters. Granted, the butt dyno is not accurate enough to measure tangible gains, it does feel slightly better. He also noted better throttle response and better pull across the rev range. We both also agreed his car felt more flat in the mid range so either we're both going crazy or there is a somewhat small but noticeable difference once the tubes+filter combo are installed. :rofl2:



pics:

http://img580.imageshack.us/img580/4666/photobda.jpg

I have no doubt that you have gotten some gains with your set-up. So far however it's been proven that the G3's are the only intakes to make a big power difference 15-20 whp.

Yea and heat soak from the metal pipings ive heard of lately...

The Z1 Silicone tubes seem to fit better than the HPS tubes, didn't have to trim the passenger side tube at all, perfect fit. The overall quality seems to be better as well, a bit thicker than the HPS. :tup:

Good to know and thanks for posting back. I may make a switch to the Z1's or the Mishimoto's. The other day I happened to open up the hood after driving and grabbed the HPS tubes, they were super hot!!

Glad to hear it! This weekend ordered them. Why the shipping to Europe takes so long time? :shakes head:

Can anyone tell me what the diameter of the Z1 tubes are? Mishimoto has this on their website:

Inner Diameter
Hose 1: 2.70"
Hose 2: 2.70"

Outer Diameter
Hose 1: 3.0"
Hose 2: 3.0"

Just curious if there really are any differences...