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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Vishnu Single Turbo Development and more aggressive Procede v5 calibrations



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      10-25-2011, 12:10 AM   #243
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Quote:
Originally Posted by Questforpower View Post
I love that turbo, I have a feeling placement will be somewhat similar to stock ...

I like the above picture showing progress but are those different wheels than u usually run?
Yep... i've been running those wheels since early this year. Provided by Zoeb@wheeldude

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How about XI fitment? I know you don't have on even near you in SF, but curious what us AWD guys might be looking at on getting this thing to fit. For sure we'll need to pull out the passenger side drive shaft to even get this thing in there.
No clue on XI fitment yet. But we will do what we can to make sure it fits.

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Hey Shiv, do you have any F body LSI experience? Because that looks A LOT like how 90% of the time my buddies camaro spent on his single turbo build. We got to where we could drop the k member + engine in less time than i could do a DP swap on my 135 lol
I have some basic LS1 experience. Namely shoving them into 3rd gen RX7tt chassis. But the tech who is doing all the wrenching on the car is a certified BMW tech so he is savvy with all the shortcuts.

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Where's the car at? That shop looks familiar.
The car is in our partner shop in Hayward (Full Function Tech). They recently moved locations (from Fremont) to a HUGE facility so that they can take on special projects like this.

Shiv
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      10-25-2011, 12:16 AM   #244
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Originally Posted by shiv@vishnu View Post
We gave up on the Borg Warner option due to severe availability issues. So we decided to go with a new snazzy turbo from Precision. Billet compressor AND turbine. We've used it once before, just recently, in a high powered (700whp) Evo and it spooled up faster and made more power than a similarly framed GT35R. It arrived last week and I snapped some pics comparing it to the ASR Twins:





Should have some good progress pics later this week. Just need to find time to go to the shop.
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      10-25-2011, 02:22 AM   #245
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can't wait!!!!!
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      10-25-2011, 02:38 AM   #246
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That car is a ridiculous sleeper haha. To anyone else on the road it looks like a regular 335 with some wheels. You could have some fun with that thing.
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      10-25-2011, 03:40 AM   #247
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Wow I have heard someone say bigger is better

You can pm me the price for your Asr´s no reason for them to lay around and get dusty and dirty
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      10-25-2011, 08:32 AM   #248
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Any thoughts on the Garrett GTX35 over the GT35? I noticed that you can get a T3 turbine housing with internal wastegate an option. That would allow you to keep the stock vacuum control setup instead of converting to an external boost controlled wastegate. Which I guess begs the question, will the Proceed still be controlling the boost with this setup?

http://www.atpturbo.com/root/release...ase111110.html
http://www.atpturbo.com/mm5/merchant...egory_Code=GTX
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      10-25-2011, 09:06 AM   #249
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Instead on focusing squeezing it in up front, why not move it to the rear? A lot more room back there. Plus you would run much cooler/denser charges with the lower EGTs. I believe I even recall a couple of E36 guys running a rear mounted turbo.

http://ststurbo.com/



Quote:
Originally Posted by Jeff@topgearsolutions View Post
I agree top mount would be cool but I dont think there is any room. You have to remember that this engine is slanted towards the exhaust side. Really puts a damper on things unlike the 2JZ.
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      10-25-2011, 09:21 AM   #250
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Quote:
Originally Posted by c4s335i View Post
Instead on focusing squeezing it in up front, why not move it to the rear? A lot more room back there. Plus you would run much cooler/denser charges with the lower EGTs. I believe I even recall a couple of E36 guys running a rear mounted turbo.

http://ststurbo.com/
Then you'd have to make a "n/a" header to replace the OEM turbos.
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      10-25-2011, 09:40 AM   #251
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Originally Posted by tbtalon94 View Post
Then you'd have to make a "n/a" header to replace the OEM turbos.
You have to make manifolds regardless, so that's not exactly a sticking point.
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      10-25-2011, 10:06 AM   #252
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Quote:
Originally Posted by c4s335i View Post
Instead on focusing squeezing it in up front, why not move it to the rear? A lot more room back there. Plus you would run much cooler/denser charges with the lower EGTs. I believe I even recall a couple of E36 guys running a rear mounted turbo.

http://ststurbo.com/
A well matched turbine wheel can extract much more energy from the hot exhaust than the cooler exhaust flow further back. Keep in mind that turbo machinery mainly relies on thermal energy transfer, not so much kinetic energy transfer from the flow.

Also the piping on those STS setups is plain ridiculous lol
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      10-25-2011, 10:27 AM   #253
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      10-25-2011, 10:28 AM   #254
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Quote:
Originally Posted by c4s335i View Post
Instead on focusing squeezing it in up front, why not move it to the rear? A lot more room back there. Plus you would run much cooler/denser charges with the lower EGTs. I believe I even recall a couple of E36 guys running a rear mounted turbo.

http://ststurbo.com/
STS = worst idea ever. The most horrendous powerband / responsiveness ever. Go drive a V8 STS car, and tell me I'm wrong....
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      10-25-2011, 10:31 AM   #255
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I'm even more interested in the plumbing solution than the turbo packaging solution. With the DPs out, there's plenty of room for the Precision turbo, but what I'm interested in is the coolant/oil solution from block to cartridge. Any pre-production hints???
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      10-25-2011, 10:35 AM   #256
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I understand from a thermodynamics perspective why people argue that it's better to have it up front. Hotter gasses means faster exhaust flow, which translates to faster turbine spool, but it also means lower exhaust density and a hotter running turbo overall which translates to lost power.

Plus, rear mounted turbo kits work and they work really well. Keep in mind I'm not arguing what's more efficient/better, but why not try to do a rear kit because of the fitment issues up front?

Yeah the piping looks like a nightmare, but since our exhaust runs down only one side, the other side is mostly open for intercooler piping.


Quote:
Originally Posted by joshuo View Post
A well matched turbine wheel can extract much more energy from the hot exhaust than the cooler exhaust flow further back. Keep in mind that turbo machinery mainly relies on thermal energy transfer, not so much kinetic energy transfer from the flow.

Also the piping on those STS setups is plain ridiculous lol
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      10-25-2011, 10:36 AM   #257
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Quote:
Originally Posted by ar design View Post
STS = worst idea ever. The most horrendous powerband / responsiveness ever. Go drive a V8 STS car, and tell me I'm wrong....
Never seen one. Again I'm not arguing it's better to put it in the rear.
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      10-25-2011, 10:41 AM   #258
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Quote:
Originally Posted by c4s335i View Post
I'm not arguing it's better to put it in the rear.
...I've made that argument a time or two...
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      10-25-2011, 10:45 AM   #259
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Best laugh of the day so far....
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      10-25-2011, 10:47 AM   #260
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Quote:
Originally Posted by c4s335i View Post
I understand from a thermodynamics perspective why people argue that it's better to have it up front. Hotter gasses means faster exhaust flow, which translates to faster turbine spool, but it also means lower exhaust density and a hotter running turbo overall which translates to lost power.

Plus, rear mounted turbo kits work and they work really well. Keep in mind I'm not arguing what's more efficient/better, but why not try to do a rear kit because of the fitment issues up front?

Yeah the piping looks like a nightmare, but since our exhaust runs down only one side, the other side is mostly open for intercooler piping.
Hotter gas = more volume = faster spool. Hotter gas also = higher turbine wheel speeds at the same wastegate DC which = more power. There is not a single advantage to the STS other than fitment. The oil scavenge setups are a nightmare, and the powerbands are terrible.
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      10-25-2011, 10:49 AM   #261
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I'm honestly more interested in others thoughts of the newer Garrett GTX35 coupled with an internal WG turbine housing. It seems like a pretty sweet turbo based on the compressor charts, and being able to keep the wastegate vacuum control would make for a simpler conversion. Although I still believe the whole vacuum boost control feature on these cars is ridiculous.

Quote:
Originally Posted by MisterSkiMask View Post
...I've made that argument a time or two...
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      10-25-2011, 10:56 AM   #262
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Originally Posted by MisterSkiMask View Post
...I've made that argument a time or two...
You, good sir, have just made my AM.
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      10-25-2011, 11:44 AM   #263
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I do remember reading how they used a rear set up for a e60 m5. Put down over 800hp.
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      10-25-2011, 11:54 AM   #264
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Quote:
Originally Posted by c4s335i View Post
Any thoughts on the Garrett GTX35 over the GT35? I noticed that you can get a T3 turbine housing with internal wastegate an option. That would allow you to keep the stock vacuum control setup instead of converting to an external boost controlled wastegate. Which I guess begs the question, will the Proceed still be controlling the boost with this setup?

http://www.atpturbo.com/root/release...ase111110.html
http://www.atpturbo.com/mm5/merchant...egory_Code=GTX
ya, procede controlled, no stand alone.
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