yep, i mean you:tup:

still looking!

Still waiting to see what these do with a Z that already has catback and HFC/TP's as generally there are diminishing returns the more you do to these cars.

Check out the Proven Power dyno thread -- I added the tubes after TP's and K&N panel filters and picked up another 3-5 whp here and there.

I'd say high flow panel filters plus tubes are worth it. Good bang for the buck as compared to the pricey intakes that don't seem to perform any better.

got mine installed with the panel filters and love it! took off my k&n typhoons for this set up and I like how much better it drives. feels really nice in 3-4000 rpm range where stock it kind of felt flat. the more miles I put on this setup the better it feels.

Do you still have them and have you considered dynoing with both? It would be interesting to see the comparison on the same car.

I just sold my typhoons or else I would. to me the car feels right, throttle response was improved and the intake has a nice subdued growl.

Anything to improve the throttle response on this car is a win. I don't want to mess with flashing the ECU every time I do another mod...lol.

I read that usually the first power mods gains the most rwhp. Such as HFCs/test pipes....intake......or CBE. So I know people will gain maybe 10-15rwhp from one of these mods stand alone.....but adding all of them together they aren't getting 10-15rwhp each time.

Knowing this...its easier to justify the less expensive mods like this because the gains won't be there from all of the high dollar name brand parts.....I think?

I understand spending the money on the CBE exhaust that looks/sounds best to you....but the rest of the mods probably won't be squeezing much else out of the car....at least on a dyno....real world driving conditions might prove otherwise.

I think I want to do these post MAF tubes now.

^^yes, yes, yes. When I took off my FI exhaust and put the Nismo on, I got so much back pressure back while maintaining the free feel of the higher revs, it made daily driving feel so much better.

I think TP's might be an exception, as it was the second mod I did, and it made the largest gains overall.

hmmm I was thinking about getting the K&N short ram intakes but after reading everyones comments think i'll go with the HPS tubes instead. Could someone tell me exactly what size tubes I need for my '11 Z Touring please? Thanks in advance!!

They only have one size available -- just get the ones listed for '09-'11 Z and you are set :D

In stock now at CorSport. I just ordered a set. :driving:

Awesome, Thanks Jordo!

Does the ECU need to be reset for these?

No; that's never really needed.

^^ yeah, what he said.

What do people generally do in regards to tuning. If you put on a CBE, CAI, and HFCs should you get a tune.? At what point in the mod list do you risk running a poor A/F R?

6sp, are you planning on putting the FI back on or do you prefer the stock set-up?

ive got the s-tune exhaust right now, along with the filters and tubes. I love the way the car feels/sounds/drives/etc. I wont go back to the FI. As far as a/f goes, with bolt ons, you wont have to worry as pretty much all the dynos we see have fine ratios, not perfect, but fine enough for general use. tuning will change the dynamics of the computer with respect to timing, fuel delivery, etc. to achieve a perfect a/f ratio and maximum power. you can, though, put your cbe, cai and hfc's on without a tune without a problem, but if you want to suck every available bit of power out of the motor with that setup, you'll need a tune.

btw, my name is JJ, haha, yours too?

Anyone dyno'd a before/after with the HPS tubes yet?

someone did on here somewhere and got 12hp in some spots, but i dont know where the graph is though.

The dyno does not have a before / after shot if I remember right. It just had three runs with the tubes, two of which had 275, 275 and then one with like 286 or something. However, the post says he cannot find his baseline so I dont know if those others are the baselines..?

It's a weird dyno graph too, instead of HP/TQ x RPM its HP x MPH.

Just looking for a comparo dyno for before/after with just tubes.

yeah i havent seen one like that yet... shame too, someone should do it.

I have one in my dyno thread...

EDIT: Actually, correction -- I forgot that the dyno of the HPS tubes is after a bunch of other mods were on. Not the same comparison you guys are looking for.

Thanks for the reply! I am trying to get the most out of the car without doing any warranty voiding mods (i.e. tune) and this really helps!

I think I will go with the MXP exhaust. It gives a gain on the stock system, has a great sound, but with a 60mm diameter, stays pretty close to the stock set-up and hopefully wont lose too much in the low end.

My first name is J... and for some reason a few friends gave me the nickname JJ lol...

that was me, they had a problem with the TQ reading so i was only able to get a HP reading. The only # on that graph that matter is the 285. that was my dyno number. The other was another 370Z that was dyno'd there that somehow got overlayed on mine. My Baseline, which I lost on my ohter flashdrive was 273.

I too would like to order these tubes and the drop in filters but can someone please tell me if this will cause any issues with my future smog inspection
I'm currently running on FI with stock cat
Thanks

you shouldnt have to worry...smog is 6 yrs away and its an easy enough install that you can reinstall the stock tubes when the time comes

That is very true!
Thanks Chops:)

No offense intended but I'm seriously doubting that the HPS tubes give you 12 RWHP. I had the Cobb PMAF tubes (same thing) with K&N drop in filters and dyno'd 270whp before and 275whp after with 5 hp gain consistently from 4k up. Not sure why the HPS tubes would suddenly add 12 RWHP for just a bit smoother airflow. How were the outside temps/humidity/car temp/oil temp on the two seperate dyno days?

The first breather mod always seems to net the most power, relatively speaking, probably because it makes an initial contribution to achieving optimal VE, and as you progress, you get diminsishing returns.

I added them on as mod number four, and gains were in the 3-5 whp throughout the powerband ballpark, which is much more likely.

Agreed, but most of the gains are in the exhaust dept, the intake is pretty open as is with a direct cold air feed too. I've seen Stillen intakes make 6 hp up top and lose midrange so I do not see 12whp for just tubes at all.

5whp is believable though.

I just posted my results on the same dyno where i got my baseline. Outside temp was about 70 both times and oil temp was about 180...Did 3 pulls after my mods (hps + AFE filter) and all 3 pulls net 285rwhp. the 370Z seems to be very consistent. I just got my ART pipes installed awhile back and waitng for my dyno here hopefully this week. If you cant believe 285 from 273, then i wonder what you will feel like when i break 300 with these pipes...am just being optimistic

panel filters, plus tubes, plus the ART pipes (which seem to make a little more power than standard TP's) and even a Y pipe should get you in the upper 290's -- close to 300 on a dynojet... so... yeah, probably.

I don't know if you'll break 300 without a tune using SAE correction, but you should definitely be in the ball park.

Oh, and 10-12 for high flow filters AND the tubes, is definitely believable.

Yeah i hope to be at 300 + - 5rwhp...kast had about 296 with what i had plus a ypipe...either way i will do a full report with dyno and TQ readings this time.

Indeed. I ordered last Tuesday and I just knew i had missed a window of availability. 6 days later, I have a brown box full of HPS parts. :excited: I also odrered the K&N drop ins, which arrived Friday, and were dropped in 2 minutes after opening. I know the car pretty well by now so I can say with confidence, that I immediately noticed a slight increase in throttle response. Is that possible with just a higher flowing air filter?? Trying hard to attribute it to placebo effect..(But I can still feel it, undeniably)

Definitely looking forward to putting these on now. I've got the F.I. TDX 18" with HCF ordered as well. SOMEBODY... give me a reason not to change my order to the L.T.H's....phuckin lovin the idea of more low end torque. (another thread, yes, I know).

I ordered HPS tubes on Sat and still no package :mad:. I can't wait to install them.

Be sure to re-dyno before/after on the same one to see appropriate gains. :tup:

I just sent my order last night and it's back ordered at this point:(
Not sure how long this will take....