Build thread for 4.4L stroker results in 61HP gain.

aus · 09-20-2017, 01:21 AM

I'm hoping it's ok to link other forums

https://www.bimmerforums.com/forum/s...troker-install

.

Bartledoo · 09-20-2017, 02:13 AM

Looks like he's claiming ~150hp gain not 61 though.

Dave07997S · 09-20-2017, 03:28 AM

Repost..

http://www.m3post.com/forums/showthread.php?t=1414377

pbonsalb · 09-20-2017, 06:33 AM

Normally you don't get 15% more power from 10% more displacement (probably 5%) but this motor has higher compression at 12.5 instead of 12.0, head work to improve flow, custom cams and tuning.

Patrón · 09-20-2017, 09:38 AM

Quote:

Originally Posted by pbonsalb

Normally you don't get 15% more power from 10% more displacement (probably 5%) but this motor has higher compression at 12.5 instead of 12.0, head work to improve flow, custom cams and tuning.

ekological · 09-21-2017, 10:26 AM

Weeee!!!

Patrón · 09-21-2017, 10:38 AM

god damn that sounds good

L4ces · 09-21-2017, 01:47 PM

Quote:

Originally Posted by ekological

Weeee!!!

What a beautiful sound. Is that the capristo?

MisterEm · 09-21-2017, 02:20 PM

Wow. That exhaust note made my pants move...

BrewRifle · 09-21-2017, 02:23 PM

Quote:

Originally Posted by MisterEm

Wow. That exhaust note made my pants move...

That's what she said...no wait...

MisterEm · 09-21-2017, 02:25 PM

Quote:

Originally Posted by BrewRifle

That's what she said...no wait...

I set that one up didn't I.... We are all still teenagers at heart.... our toys just got pricier.

aus · 09-21-2017, 03:10 PM

Sorry about the repost. I missed the original one.

Mods, feel free to merge if necessary.

cliverman · 09-21-2017, 03:17 PM

Quote:

Originally Posted by ekological

Weeee!!!

Damn it! I want more video. That thing's a beast!

ekological · 09-21-2017, 04:11 PM

Yessir. Bimmerworld long tri-Y headers, Bimmerworld catted midpipe, and Capristo with the valves opened (haven't had time to run the vacuum line or the electronics). I plan on adding resonators to hopefully refine the sound a bit as it's too loud for tooling around the neighborhood.

Quote:

Originally Posted by L4ces

What a beautiful sound. Is that the capristo?

ekological · 09-21-2017, 05:12 PM

No video...for obvious reasons...

Quote:

Originally Posted by cliverman

Damn it! I want more video. That thing's a beast!

cliverman · 09-22-2017, 03:35 PM

Quote:

Originally Posted by ekological

No video...for obvious reasons...

Hell yeah! That sounds great! Thx, I have a new ring tone.

L4ces · 09-22-2017, 05:41 PM

Quote:

Originally Posted by cliverman

Quote:

Originally Posted by ekological

No video...for obvious reasons...

Hell yeah! That sounds great! Thx, I have a new ring tone.

Great idea.

TomHudson · 09-25-2017, 06:06 AM

Quote:

Originally Posted by pbonsalb

Normally you don't get 15% more power from 10% more displacement (probably 5%) but this motor has higher compression at 12.5 instead of 12.0, head work to improve flow, custom cams and tuning.

Isn't there a big increase in torque with stroker motors?

pbonsalb · 09-25-2017, 06:15 AM

Definitely an increase but how much of an increase do you expect from 10% more displacement? I think 5% more torque is actually a lot. Here a tiny bit would have also been from the increased compression. But typically with more aggressive cams and headwork and bigger headers, you trade some low end power and torque for more top end power. I cannot recall whether he got full vanos travel or not with the bigger cams. This build would be like having your cake and eating it - at least as good as a modded stock block on the bottom end and probably a bit better plus way more upper midrange and top end. This was an expensive build with the best parts and custom dyno tuning.

TomHudson · 09-25-2017, 09:35 AM

Wow, that's a lot of money for that. Makes me wonder why BMW didn't use their 4.4 in all their production M cars...would have been a nice farewell to their NA line up.

ekological · 09-25-2017, 10:17 AM

Last I checked, a stock S65 puts out 414HP/300ft-lb and this stroker puts out 550HP/400ft-lb. A 33% increase isn't considered big?

Quote:

Originally Posted by TomHudson

Isn't there a big increase in torque with stroker motors?

pbonsalb · 09-25-2017, 11:53 AM

This is way more than just a stroker.

09-20-2017, 01:21 AM	#1
aus Major General 890 Rep 9,031 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Build thread for 4.4L stroker results in 61HP gain. I'm hoping it's ok to link other forums https://www.bimmerforums.com/forum/s...troker-install . __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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09-20-2017, 02:13 AM	#2
Bartledoo Driver 2692 Rep 2,714 Posts Drives: 2011 E90 M3 6MT Join Date: Aug 2015 Location: Seattle, WA iTrader: (0) Garage List 2023 Corvette Stingray [0.00] 2002 Porsche Boxster [0.00] 2011 E90 M3 [0.00] 2021 Tesla Model Y [0.00]	Looks like he's claiming ~150hp gain not 61 though.
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09-20-2017, 03:28 AM	#3
Dave07997S Brigadier General 720 Rep 3,964 Posts Drives: 2020 Ford Mustang GT Join Date: May 2009 Location: El Segundo, CA iTrader: (1)	Repost.. http://www.m3post.com/forums/showthread.php?t=1414377
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09-20-2017, 06:33 AM	#4
pbonsalb Lieutenant General 5216 Rep 10,601 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	Normally you don't get 15% more power from 10% more displacement (probably 5%) but this motor has higher compression at 12.5 instead of 12.0, head work to improve flow, custom cams and tuning.
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09-21-2017, 10:26 AM	#6
ekological Second Lieutenant 266 Rep 271 Posts Drives: 2002 M5 Join Date: Mar 2014 Location: Central NJ iTrader: (3)	Weeee!!!
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09-21-2017, 10:38 AM	#7
Patrón PAZUZU 545 Rep 2,058 Posts Drives: '15 M4 Join Date: Sep 2013 Location: San Antonio, TX iTrader: (1) Garage List 2015 BMW M4 [0.00] 2009 BMW M3 [10.00]	god damn that sounds good __________________ 2009 M3 DCT ESS625+ SOLD 2015 M4 BSM/Silverstone F4LCON @texasMclub IG @jagemoets
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09-21-2017, 02:20 PM	#9
MisterEm Second Lieutenant 33 Rep 203 Posts Drives: slow turd Join Date: Sep 2010 Location: huh iTrader: (0)	Wow. That exhaust note made my pants move... __________________ Naturally Agitated - S54B34 CSL Clone - *395 285 SAE on 91 pump* - 3150 lbs - P car and E9X eater.
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09-21-2017, 03:10 PM	#12
aus Major General 890 Rep 9,031 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Sorry about the repost. I missed the original one. Mods, feel free to merge if necessary. __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
	Appreciate 0 Quote

09-25-2017, 06:15 AM	#19
pbonsalb Lieutenant General 5216 Rep 10,601 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	Definitely an increase but how much of an increase do you expect from 10% more displacement? I think 5% more torque is actually a lot. Here a tiny bit would have also been from the increased compression. But typically with more aggressive cams and headwork and bigger headers, you trade some low end power and torque for more top end power. I cannot recall whether he got full vanos travel or not with the bigger cams. This build would be like having your cake and eating it - at least as good as a modded stock block on the bottom end and probably a bit better plus way more upper midrange and top end. This was an expensive build with the best parts and custom dyno tuning.
	Appreciate 0 Quote

09-25-2017, 09:35 AM	#20
TomHudson Major 658 Rep 1,118 Posts Drives: 2011 E90 M3 Join Date: May 2015 Location: Toronto iTrader: (0)	Wow, that's a lot of money for that. Makes me wonder why BMW didn't use their 4.4 in all their production M cars...would have been a nice farewell to their NA line up.
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09-25-2017, 11:53 AM	#22
pbonsalb Lieutenant General 5216 Rep 10,601 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	This is way more than just a stroker.
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