N54Tech.com - International Turbo Racing Discussion
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threethirtyfive threethirtyfive is offline
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Default Custom Turbo Inlet - DIY Project - 02-03-2015, 11:57 AM

I mentioned I would share this in an earlier forum, so here goes nothing!

My need to mess with things is always present, the OEM inlet system seemed ridiculously long and restrictive to me. The first test I did was to remove my STETT CAI. Added some cones I had, WOW. Big difference in the way the car felt.

I then decided to remove the OEM inlets. I sorted out the front however the rear I was waiting on until I dropped the subframe. I can't imagine doing this with the subframe in place, no thank you.

- This does require some custom work, depending on the interest I could assemble a basic relocation bracket, that is later on down the road as I still want to test this.

- You are not seeing the PCV intake as I have not welded the tube to the central intake.

- All tubing is alloy except for the SS pipe connecting the filter.

- If you attempt this please, please make sure you have a good mechanical ability. While not overly hard, it takes some thinking as we are not working with very much space.

Sorry for the potato photo, hard to get it all in without the fisheye. To build this you will need the following.

2 x 1.75" - 2.00" 90 degree silicone reducers (you may go up to 2.5" but I wanted a little more room)

2 x 2.00" aluminum intercooler 90 degree bends.

2 x 2.00" - 2.50" silicone reducing coupler

1 x Aluminum Y Pipe 2 x 2.50" - 1 x 3.00"

1 x 3.00" - 3.50" or 4.00" 90 degree silicone reducer

2 x 1.75" T bolt clamps

4 x 2.00" T bolt clamps

2 x 2.50" T bolt clamps

1 x 3.00" T bold clamp

2 x 3.50" - 4.00" t bolt clamp (filter and pipe clamps)

1 x Aluminum short joiner that matches your filter and coupling size (3"-4")

4' 5/8" PCV hose and elbows

5/8" weld in barb or 5/8" tube (for attaching PCV to intake)

1 x 3"-4" K&N cone filter

I will have more updates in the following days. I plan to add some heat shields here in the future however I am really excited to get the car buttoned up and started.

I have probably forgotten a few bits but I will continue to add to this with installed photos, results etc. Give me a little time and I will add links on where you can purchase these items.

Cost wise, not including the K&N or the filter joiner (already had those) I am in at just about $100. I figure all said and done I should be under $150.

Installed photos and more coming soon.



'07 e90
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Newguy123 Newguy123 is offline
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Default 02-03-2015, 12:11 PM

nice man


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Kish2604 Kish2604 is offline
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Default 02-03-2015, 12:21 PM

This looks the business compared to some other images recently released, nice and simple system with a clean look...

A nice bracket to sturdy the assembly and perhaps mount to the shock tower or the strut brace will help complete the package.

Looking forward to more pics...


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threethirtyfive threethirtyfive is offline
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Default 02-03-2015, 01:00 PM

Quote:
Originally Posted by Kish2604
This looks the business compared to some other images recently released, nice and simple system with a clean look...

A nice bracket to sturdy the assembly and perhaps mount to the shock tower or the strut brace will help complete the package.

Looking forward to more pics...
Thank! You read my mind, there will be a small bracket coming off the bottom of the filter pipe! More pics to come.


'07 e90
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amsnow440 amsnow440 is offline
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Default 02-03-2015, 02:07 PM

Awesome! definitely subscribed

In addition to the cost effective solution I'm curious to see the gains (if any) to be had on stock turbos. Do you have a before dyno by any chance?

I'm sure the turbo sound with be glorious as well! Nice work!


2010 135i 6MT Jet Black | M-Sport | Michelin PSS 255/225 | Whiteline RSFB | Dinan Camber Plates | M3 Front Arms | JB4 G5 ISO w/MHD E85 Flash | E50 | BMS DCI | VRSF DP | VRSF CP w/ Tial | VRSF 7" FMIC | Fuel-It Stage 1 | NGK 5992 | TC Kline SA | VMR v710
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Blaster400 Blaster400 is offline
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Default 02-03-2015, 02:14 PM

That didn't take you long.


JB4 G5 w/BMS MHD backend flash | MOTIV 750 | 100% E85 | MOTIV port injection | Fuel-It Stage 3+ LPFP | Akrapovic Exhaust | DSS Axles | DEFIV lockdown kit | Quaife LSD
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LostMarine LostMarine is offline
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Default 02-03-2015, 02:20 PM

FrozenBoost.com probably has all the required parts you would need for that, cheap.

It sort of looks like you could use a 996 kit for the majority of it, measurements are probably off and most likely more expensive though
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black535xi black535xi is offline
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Default 02-03-2015, 02:34 PM

Love it, great job man!


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Wedge1967 Wedge1967 is offline
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Default 02-03-2015, 02:38 PM

Looks like a HPF Y pipe for the 3.5" exhaust. Good luck with the install.
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Default 02-03-2015, 02:52 PM

Nice work! Looks clean and simple to assemble. In for more pics


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Best stock turbo 12.5 @ 19.46 spinning all the way down
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Default 02-03-2015, 02:57 PM

that looks cool. i wonder how much a performance difference it would make


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jyamona jyamona is offline
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Default 02-03-2015, 03:43 PM

sub'd for installed pics. nice work!
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amr_e90 amr_e90 is offline
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Default 02-03-2015, 03:46 PM

Make me one!!!!!!!


jb4 G5iso/bms meth kit/ur cp tial bov/hpf catback / cpe ***/cpe intake/bms flash/big tom intercooler/fuel it stg1/rbturbos/vtt inlets/spec stg3+

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Default 02-03-2015, 03:57 PM

That's pretty cool... good work! Curious to see it installed.
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Opo Opo is offline
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Default 02-03-2015, 04:10 PM

Looks excellent, definitely going to follow this closely to see the gains. Will 100% build one for myself as well vs. VTT or TFT options if the gains are there on stock turbos, or any benefits really.
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ShocknAwe ShocknAwe is offline
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Default 02-03-2015, 04:39 PM

Very cool. Looking forward to more information.


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zero2sixtyZ zero2sixtyZ is offline
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Default 02-03-2015, 06:06 PM

Subscribed. Interested to see the installed pics / results.
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threethirtyfive threethirtyfive is offline
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Default 02-03-2015, 07:24 PM

Thanks everyone! I have been planning to do this for months but was really just dragging my feet on pulling the turbos to fix the rear. I finally decided to get off my ass and things went pretty quickly. I wont lie, the TFT post kicked me in the ass.

Yes to frozenboost.com - This is your place for nice polished aluminum IC *****. They ship quickly and have great prices.

Everything else I recommend eBay. You can find quality, shipped from America, couplers and more for the best prices possible. Free two day shipping and couplers range from $5-$20.

I was normal FBO so I plan to dyno this setup with the new inlets and see what happens. If the numbers are there I will consider putting together a complete kit.

Fitment is good, just some rough photos for now.





'07 e90
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BrianMN BrianMN is offline
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Default 02-03-2015, 07:36 PM

Very nice execution! Gotta love the clean designs!

This is remarkably similar to my 2nd prototype design, but based on paperwork/CFD analysis and real-world testing, it didn't make the grade
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Default 02-03-2015, 07:42 PM

Hurry up and take my money!!!
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Default 02-03-2015, 07:48 PM

Only thing I think I would add is some of that fancy heat reflective gold tape near the the manifolds. If this does in fact add power and you make a kit I will gladly hand over my money like I already said haha. SUBBED
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Default 02-03-2015, 07:53 PM

Looking good man!


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threethirtyfive threethirtyfive is offline
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Default 02-03-2015, 08:51 PM

Quote:
Originally Posted by BrianMN
Very nice execution! Gotta love the clean designs!

This is remarkably similar to my 2nd prototype design, but based on paperwork/CFD analysis and real-world testing, it didn't make the grade
There we go, is this Brian from TFT? I don't expect you to give up your details, hell part of this is me working out my brain.

The only variance we have is the dual vs. single filter. Did you find that big of a flow variance going to dual filters? I decided on the single filter for a few reasons, curious to see how it works out.

PCV is all finished up (I braze stainless, don't own a tig and the mig is no good) really hoping to fire her up tomorrow.

The end product will have a heat shield made from SS, I need to research more about protecting the aluminum bits. I want to make sure I don't insulate heat into the *****.


'07 e90
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threethirtyfive threethirtyfive is offline
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Default 02-03-2015, 08:56 PM

Quote:
Originally Posted by HouseN54
Only thing I think I would add is some of that fancy heat reflective gold tape near the the manifolds. If this does in fact add power and you make a kit I will gladly hand over my money like I already said haha. SUBBED
First is testing which works best. The OEM exhaust manifolds actually keep the heat low, I don't want to over insulate the intake so that rather than keep it cool it keeps it warm. The Aluminum cools quickly (also heats up quickly) so I plan to call my coating guys and ask whats up.

We will see how plans go to sell this. Lots of testing to do and before I sell anything I need to make sure it's all up to snuff. Im not planning to enter the arena with TFT until I have a kit as well designed as his.


'07 e90
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threethirtyfive threethirtyfive is offline
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Default 02-03-2015, 08:59 PM

Quote:
Originally Posted by Wedge1967
Looks like a HPF Y pipe for the 3.5" exhaust. Good luck with the install.
Ken, pretty close. This is an aluminum piece that is made by "The China" and the quality is really good.

I contemplated dual intakes but I feel like the single will be enough.

I sadly did not dyno before. That said, my goal is to see if I can max out the OEM turbos so if I can put down more than any other stock turbo, the inlets must help


'07 e90
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