Bimmer Performance Center revisits an old friend

Phil@BPC · 04-10-2018, 02:57 PM

This a teaser but we will be revisiting an old friend that everyone has been asking us about on our Youtube channel, Facebook, Instagram, Twitter and PM's. The E90 N52 Turbo will be receiving some updates.

I will be updating this thread with more photos as we continue revisiting project. For now here are some photos of some of the updates

W37V · 04-10-2018, 03:52 PM

Aliceee!!!!

Phil@BPC · 04-10-2018, 04:38 PM

Noir · 04-10-2018, 04:49 PM

Thank the Lord.
I inquired with Bob about this, long ago.
Stoked!!

BIGGNS · 04-10-2018, 05:57 PM

Sub'd. You had me at teaser

Eagle1oh7 · 04-10-2018, 07:31 PM

Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?!

Taskmaster · 04-11-2018, 09:06 AM

Quote:

Originally Posted by Eagle1oh7

Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?!

High compression add about zero in power. The biggest upgrade will be going to manual from automatic - and looking into a dyno tune with something like E85.

This is awesome though.

desertman123 · 04-11-2018, 09:14 AM

HYPE

AWSB328iM · 04-11-2018, 09:36 AM

Quote:

Originally Posted by Taskmaster

Quote:

Originally Posted by Eagle1oh7

Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?!

High compression add about zero in power. The biggest upgrade will be going to manual from automatic - and looking into a dyno tune with something like E85.

This is awesome though.

I guess your mindset is anything under 10hp is nothing, but typically raising the compression from say 10:1 to 11:1 would result in a ~10hp bump once the timing and fuel is optimized for it. Is it worth it on anything besides a race car? I would say no.

Noir · 04-11-2018, 10:52 AM

Quote:

Originally Posted by Taskmaster

Quote:

Originally Posted by Eagle1oh7

Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?!

High compression add about zero in power. The biggest upgrade will be going to manual from automatic - and looking into a dyno tune with something like E85.

This is awesome though.

cant wait to see bob's findings on the e85 topic

e90dum · 04-11-2018, 11:06 AM

i waited a very long time for this post

atmosphericM · 04-11-2018, 12:59 PM

Quote:

Originally Posted by Eagle1oh7

Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?!

I've often speculated about my N51's hardware and wondered if all it would take to "make it an N52" is N52 rods and pistons. That said, totally not worth the work anyway for under 10 whp lol.

I could easily be wrong, but I remember that people usually talked about going to a LOWER compression when building for turbo setups, but I honestly couldn't tell you why as I never cared to look into it. I'm guessing that's what BPC is doing with theirs. Hmm, maybe the N51 in stock form is actually a better platform to turbo than the N52?

Taskmaster · 04-11-2018, 01:08 PM

Quote:

Originally Posted by AWSB328iM

I guess your mindset is anything under 10hp is nothing, but typically raising the compression from say 10:1 to 11:1 would result in a ~10hp bump once the timing and fuel is optimized for it. Is it worth it on anything besides a race car? I would say no.

No, my mindset is opening up the engine to replace the pistons and gaining zero horsepower wouldn't be worth it.

6ixSpd · 04-11-2018, 01:09 PM

Good stuff! I'm more curious about that crazy 8000+ RPM N52 you guys had... no info at all on that setup though, not on the youtube video either.

Taskmaster · 04-11-2018, 01:09 PM

Quote:

Originally Posted by atmosphericM

I've often speculated about my N51's hardware and wondered if all it would take to "make it an N52" is N52 rods and pistons. That said, totally not worth the work anyway for under 10 whp lol.

I could easily be wrong, but I remember that people usually talked about going to a LOWER compression when building for turbo setups, but I honestly couldn't tell you why as I never cared to look into it. I'm guessing that's what BPC is doing with theirs. Hmm, maybe the N51 in stock form is actually a better platform to turbo than the N52?

The N51 actually has a different head.

atmosphericM · 04-11-2018, 01:13 PM

Ah, so same bottom end / rods / pistons? Thanks for the info!

AWSB328iM · 04-11-2018, 01:17 PM

Quote:

Originally Posted by Taskmaster

Quote:

Originally Posted by AWSB328iM

I guess your mindset is anything under 10hp is nothing, but typically raising the compression from say 10:1 to 11:1 would result in a ~10hp bump once the timing and fuel is optimized for it. Is it worth it on anything besides a race car? I would say no.

No, my mindset is opening up the engine to replace the pistons and gaining zero horsepower wouldn't be worth it.

Agreed, I'd rather go down the route of a S54 transplant then build a N52 long block.

hassmaschine · 04-11-2018, 01:18 PM

I'm kind of interested in the pistons - they look like they are probably a longer skirt that stock? And looks like thicker ring lands to deal with the boost. They are probably heavier than stock though (same with the rods). What are your thoughts on machined caps vs cracked caps? I guess you just deal with it with bigger bolts?

Can you post a comparison of weights, and maybe something about how you're honing (or machining) the bores of the N52 block?

Quote:

Originally Posted by Eagle1oh7

Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?!

We already have forged rods - they are just designed to be super light (cracked cap, tapered small end, etc). These are made to be strong to take boost pressure - but they will most likely be heavier than stock, and maybe not the best choice if you want N/A.

Quote:

Originally Posted by 6ixSpd

Good stuff! I'm more curious about that crazy 8000+ RPM N52 you guys had... no info at all on that setup though, not on the youtube video either.

That was the same engine they boosted - it was all stock internally.

cwlo · 04-11-2018, 03:17 PM

On the 8000 rpm, I always thought it was the oil in the lifter foaming up, and the lifter collapsing that kept anything over 7400rpm a problem. Wonder what their solution was.

Torgus · 04-11-2018, 04:31 PM

fun fun, any plans for building the head?

rjahl · 04-11-2018, 05:44 PM

Quote:

Originally Posted by cwlo

On the 8000 rpm, I always thought it was the oil in the lifter foaming up, and the lifter collapsing that kept anything over 7400rpm a problem. Wonder what their solution was.

Solid lifters fix that problem

scanspeak · 04-11-2018, 06:44 PM

I thought the manual transmission was the limiting factor.

04-10-2018, 02:57 PM	#1
Phil@BPC Lieutenant 463 Rep 489 Posts Drives: E39 M5/ E30 325is Join Date: Nov 2017 Location: Raleigh, NC iTrader: (0) Garage List 2003 BMW M5 [0.00] 1990 BMW 325is [0.00]	Bimmer Performance Center revisits an old friend This a teaser but we will be revisiting an old friend that everyone has been asking us about on our Youtube channel, Facebook, Instagram, Twitter and PM's. The E90 N52 Turbo will be receiving some updates. I will be updating this thread with more photos as we continue revisiting project. For now here are some photos of some of the updates
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04-10-2018, 03:52 PM	#2
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04-10-2018, 04:38 PM	#3
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04-10-2018, 04:49 PM	#4
Noir Major 883 Rep 1,413 Posts Drives: 2006 E90 330i 6MT Join Date: Aug 2016 Location: San Antonio iTrader: (1)	Thank the Lord. I inquired with Bob about this, long ago. Stoked!! __________________ See you, space cowboy. *Supercharged*
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04-10-2018, 05:57 PM	#5
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04-10-2018, 07:31 PM	#6
Eagle1oh7 Lieutenant Colonel 287 Rep 1,710 Posts Drives: '11 328i Sedan Join Date: Oct 2012 Location: Chula Vista CA iTrader: (0)	Forged pistons and connecting rods?!?! Would this be an upgrade available to us non-turbo dudes to be able to run more compression on revised tunes?!?! __________________ DONE: Seibon CF Hood, M3 Rep, MSport rear w/DD CF Diffuser, M3 Rep Skirts, Seibon CSL trunklid, Forgestar F14 18s w/Michelin PSS, Eisenmann catback, AA Headers, BPC Stage 2, Charcoal Delete+revMotor+AFE Drop In filter FUTURE MODS: LED headlights, CF rooftop, M3 Suspension Conversion, Dinan CAI Mod
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04-11-2018, 09:14 AM	#8
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04-11-2018, 11:06 AM	#11
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04-11-2018, 01:09 PM	#14
6ixSpd Save the manuals! 6009 Rep 6,739 Posts Drives: '16 M3, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	Good stuff! I'm more curious about that crazy 8000+ RPM N52 you guys had... no info at all on that setup though, not on the youtube video either. __________________ '16 M3 \| '23 718 Spyder Past: E92 M3, F87 M2, E39 M5, etc
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04-11-2018, 01:13 PM	#16
atmosphericM Basic Bimmer 518 Rep 935 Posts Drives: E92 328i 6MT ///M Join Date: Sep 2017 Location: B'ham iTrader: (1) Garage List 2013 BMW 328i Coupé ... [10.00]	Ah, so same bottom end / rods / pistons? Thanks for the info!
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04-11-2018, 03:17 PM	#19
cwlo Private First Class 84 Rep 110 Posts Drives: 04 m3 Join Date: Dec 2017 Location: Chicago iTrader: (0)	On the 8000 rpm, I always thought it was the oil in the lifter foaming up, and the lifter collapsing that kept anything over 7400rpm a problem. Wonder what their solution was.
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04-11-2018, 04:31 PM	#20
Torgus Slow. 3782 Rep 7,151 Posts Drives: Single Turbo N54 on Meth! Join Date: Jun 2012 Location: Boston, MA iTrader: (2) Garage List 2007 BMW E92 [10.00] 2007 BMW E90 [0.00] 2006 BMW E91 [0.00]	fun fun, any plans for building the head? __________________ E92 ACF ST 6466 + Meth Motiv / E70 #1 fully deleted 2.8 race flash / E70 #2 JBD / E90 & E91 both retired Psalm 144
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04-11-2018, 06:44 PM	#22
scanspeak Lieutenant 354 Rep 511 Posts Drives: BMW E92 325i 12/2007 Join Date: Apr 2011 Location: Melbourne, Australia iTrader: (0)	I thought the manual transmission was the limiting factor.
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