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#1 [email protected]

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Posted 17 May 2011 - 01:11 AM

This is a turbo inlet pipe that runs between the fresh air inlet of the turbo and the air filter system whether it be OEM or aftermarket.

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It bolts onto the turbo and the open end goes to the filter system.

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This is the size of the pipe where it bolts onto the turbo

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This is the size of the turbocharger air inlet

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The black line shows how much material would have to be removed to make it match for inside diameter

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This is why this is an area where Nissan changed the 2012, increasing the size of this tube. I looked at porting mine to match but the problem is that it necks down to that small 1.76" size way up the pipe where you can't get to it using a rotary file. Even if you could get in there the material you'd have to remove would make the pipe so thin that that would not be an option. So.....the solution is to build new inlet pipes which is what I'm in the process of doing. I may make a production run of these, and they will be priced lower than some of the other options out there currently if I do. They will be complete with correct fittings keeping all the stock hoses and fittings....incl BOV recirc.

For those of us looking for the maximum power and have bolted on every power mod except aftermarket turbos, new inlet pipes I'm willing to bet will make considerably more power.

And for those with turbo upgrades new larger inlet pipes are a must have.
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#2 nico

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Posted 17 May 2011 - 01:13 AM

very interesting. thanks for the info and explanation. i'll be looking forward to those inlet pipes of yours! :newbie:
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#3 max_R35

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Posted 17 May 2011 - 01:17 AM

Can't argue with they guy who helped in designing the intake that was used in the fastest stock turbo GT-R

Good luck
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#4 David_Yu

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Posted 17 May 2011 - 02:22 AM

Aren't there any matching size ones already on the market? I would have thought it an obvious mod, but don't remember reading about any.
Why would Nissan have undersized them initially? What would they gain? If nothing else, isn't it guaranteeing turbulent flow into the turbine, which is a bad thing?
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#5 max_R35

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Posted 17 May 2011 - 02:29 AM

There are replacments in the market Mr. Yu

However, gotboost would like to create a more economical replacment for himself which may become a product if enough interest is found

Don't want to sound like an a55hole but it's the compressor inlet not turbine
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Stillen Front License Plate Bracket, Yoshi/RevoZport DN Duckbill CF Trunk, GT-RR CF Steering Wheel, Fringe XVO Afterburner tips, SMS Design & Performance Spec Mi CF Engine Cover # 9of10, Carbon Dry AC surround and door handles, Rexpeed Mirrors, Emblems, Carbon Side Emblem Cover and Carbon Hood Dampers, Matte Black VR G2 F20x10 R20x11

We rarely are the first to market on the product but in our eyes we always produce the best product when we do finally release it :)


#6 celsius

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Posted 17 May 2011 - 02:33 AM

.

Edited by celsius, 17 May 2011 - 06:15 AM.

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#7 domino_z

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Posted 17 May 2011 - 02:56 AM

I went with the top secret pipes, not only are they the biggest on the market but also one of the cheapest
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#8 [email protected]

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Posted 17 May 2011 - 03:09 AM

I went with the top secret pipes, not only are they the biggest on the market but also one of the cheapest



Hopefully my option will be considerably less expensive than those.
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#9 Guy

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Posted 17 May 2011 - 04:17 AM

What about having the existing pipes Extrude Honed to remove some of the internal material?

#10 NickTO

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Posted 17 May 2011 - 05:19 AM

:)

Edited by NickTO, 18 September 2013 - 11:14 PM.

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#11 [email protected]

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Posted 17 May 2011 - 05:33 AM

Solution found yrs ago hks premium suction. Fits like stock with increased size to decrease pumping loss. Not cheap though.

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#12 GTRRN

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Posted 17 May 2011 - 05:51 AM

I spoke to Chris at AMS. they are producing an inlet pipe for a very good price.

#13 cadburyGTR

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Posted 17 May 2011 - 06:02 AM

Some of the guys said the larger inlet pipe (HKS, Blitz etc) made the car more 'laggy' or felt a loss in low end power/response..Some said its spools faster..Im confused..

Any idea whats the real outcome to expect? With tuning and without tuning..

#14 domino_z

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Posted 17 May 2011 - 06:42 AM

Hopefully my option will be considerably less expensive than those.


its about time there was a cheaper option

im suprised these dont get more attention, i dont see the point of fitting larger pipe'd intakes when they neck down anyway at the oem inlet pipe
2011 R35 (Aus spec) - 750awhp/600ftlb, FBO E85, WR600 ball bearing turbos, ported/polished oem manifold, Dodson Super Stock clutches + Jacks welded baskets, built and tuned by Willall Racing

#15 k3vkoh

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Posted 17 May 2011 - 07:18 AM

I always wonder how changing to larger aftermarket pipes helps, now I know. I'm interested if price is right and installation is DIYable, no need for engine to be dropped right?
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#16 Jenner

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Posted 17 May 2011 - 07:29 AM

i dont see the point of fitting larger pipe'd intakes when they neck down anyway at the oem inlet pipe

If you are maxing out the stock MAF sensor then the larger diameter (3") intake pipe will allow you more resolution on the sensor and allow more headroom for tuning with larger injectors.

My setup maxed the stock MAFs and stock injectors when I upgraded to catless downpipes.
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#17 paparazzi

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Posted 17 May 2011 - 07:56 AM

.

Edited by paparazzi, 17 May 2011 - 07:59 AM.

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#18 paparazzi

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Posted 17 May 2011 - 07:58 AM

For those of us looking for the maximum power and have bolted on every power mod except aftermarket turbos, new inlet pipes I'm willing to bet will make considerably more power.


The Mine's ones have been tested to show increases of between 20 - 30ps.

It'll also improve throttle response also.

JDM MINE'S dry carbon Spec X 6.0 
Engine built by Dave "Gotboost" Pickering boosted by Spec-V turbos and tuned by Linney Tuning


#19 NickTO

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Posted 17 May 2011 - 10:06 AM

:)

Edited by NickTO, 18 September 2013 - 11:14 PM.

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#20 [email protected]

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Posted 17 May 2011 - 10:39 AM

Your measurements are spot-on. However, can you measure the diameter of the turbo inlet (not the pipe) at the compressor wheel, or take a picture head on of the turbo intake, the flange is tapered iirc and the diameter of the actual turbo inlet at the compressor wheel actually matches the smaller diameter of the intake runner. So while the turbo intake measure 2.03", at the compressor that opening has been much reduced.

Here's what I mean, the picture below shows the housing diameter at the OEM compressor is much narrower than the opening and may matche the diameter of the intake runner:

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Yes Nick, I realize that it necks down to the intake impeller, but I've done a lot of flow bench testing in my life, and having a set-up like the stock pipe provides is not the ideal situation for airflow.
Tim Bailey has already dyno tested a car with aftermarket inlet pipes and the results were worth pursuing........and it was a stock turbo gtr. :)
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