✪ Alekshop 4.6L S65 Stroker - World's Highest HP NA Motor

FogCityM3 · 11-10-2014, 06:38 PM

Awesome results! I'd love to see the Spark Advance Graph for the stroker using 94 octane.

C-M2 · 11-10-2014, 07:36 PM

About time you share

Alekshop · 11-10-2014, 07:46 PM

Quote:

Originally Posted by C-M2

About time you share

Thanks!

In33anity · 11-10-2014, 09:27 PM

Very Cool! Congrats!!!

Alekshop · 11-10-2014, 10:59 PM

Quote:

Originally Posted by In33anity

Very Cool! Congrats!!!

Hujan · 11-11-2014, 12:34 AM

Very nice results.

1) What's up with that dip in the torque and power curves for the Alekshop stroker compared to the others?

2) I may have missed it, but was this a sleeved build?

3) Did the car have any mods other than the Akrapovic GT4?

While still an expensive endeavor, there is some top end to be gained over an FBO M3 even on 91 octane, not to mention the tremendous torque gains down low. I bet this would be a really fun motor to drive on the street and the track.

e92zero · 11-11-2014, 12:43 AM

Amazing!!! I am hoping to some day do this also.

Alekshop · 11-11-2014, 12:47 AM

Quote:

Originally Posted by Hujan

Very nice results.

1) What's up with that dip in the torque and power curves for the Alekshop stroker compared to the others?

2) I may have missed it, but was this a sleeved build?

3) Did the car have any mods other than the Akrapovic GT4?

While still an expensive endeavor, there is some top end to be gained over an FBO M3 even on 91 octane, not to mention the tremendous torque gains down low. I bet this would be a really fun motor to drive on the street and the track.

There is no benefit to sleeve aluminum block with NA stroker build. Not other mods except for Akrapovic GT4. With cams you loose some low end torque, other strokers don't have cams.

It's a fun car to drive

Soorena · 11-11-2014, 01:24 AM

Nice build!

Just to clarify this is certainly not the most powerful NA S65. There are quite a few S65 engines into mid to high 500 HP on crank. Judd makes +650 HP destroked flat plane S65s. My friend's KMS engine made 610 HP last time on the dyno using convential cross plane design. My racecar's engine (i'm using the same cams as you) is not finished with tuning, yet made 565 HP. This however is the highest horsepower on a chassis dyno, and probably the most powerful street legal car.

L4ces · 11-11-2014, 04:06 AM

Congrats!
Have you guys considered superchargIng it?
Any thoughts?

Hujan · 11-11-2014, 09:55 AM

Quote:

Originally Posted by Alekshop

There is no benefit to sleeve aluminum block with NA stroker build. Not other mods except for Akrapovic GT4. With cams you loose some low end torque, other strokers don't have cams.

It's a fun car to drive

Absolutely agree. I am not a fan of sleeving except perhaps if necessary to save a damaged engine.

Alekshop · 11-11-2014, 12:15 PM

Quote:

Originally Posted by Soorena

Nice build!

Just to clarify this is certainly not the most powerful NA S65. There are quite a few S65 engines into mid to high 500 HP on crank. Judd makes +650 HP destroked flat plane S65s. My friend's KMS engine made 610 HP last time on the dyno using convential cross plane design. My racecar's engine (i'm using the same cams as you) is not finished with tuning, yet made 565 HP. This however is the highest horsepower on a chassis dyno, and probably the most powerful street legal car.

Just to clarify it's the highest HP street running NA S65. I understand there are higher HP S65 race build motors running on stand alone ECUs but this is your street car. If you can post some dyno charts showing those numbers on MAHA on the factory ECU than I will definitely be impressed

Also the crank hp numbers you are referring too are done on the Engine dyno or MAHA ? It gets really tricky with claimed crank horse power numbers as you might already know. For example Dinan's 4.6 stroker is rated at 502hp but according to the numbers we have seen on Dynojet dyno it can't even produce enough power to get to 502hp with let's say 20% drivetrain loss (20% is a really high number). Usually It's around 16-17% from what we have seen.

Alekshop · 11-11-2014, 12:17 PM

Quote:

Originally Posted by L4ces

Congrats!
Have you guys considered superchargIng it?
Any thoughts?

The goal is to keep this car NA power. Otherwise we would build a Low Compression without Schrick cams

Soorena · 11-11-2014, 12:42 PM

Quote:

Originally Posted by Alekshop

Just to clarify it's the highest HP street running NA S65. I understand there are higher HP S65 race build motors running on stand alone ECUs but this is your street car. If you can post some dyno charts showing those numbers on MAHA on the factory ECU than I will definitely be impressed

Also the crank hp numbers you are referring too are done on the Engine dyno or MAHA ? It gets really tricky with claimed crank horse power numbers as you might already know. For example Dinan's 4.6 stroker is rated at 502hp but according to the numbers we have seen on Dynojet dyno it can't even produce enough power to get to 502hp with let's say 20% drivetrain loss (20% is a really high number). Usually It's around 16-17% from what we have seen.

Engine dyno of course. The engines i mentioned all run on high end standalone ecu's such as Syvecs, KMS, Pectel etc... The Judd engine idles at ~3,000 RPM. My pistons are 13.5:1 for example, tuned for 114 octane. Definitely not what you call street engines.

I apologize if it sounded i was taking away anything from your build at first glance, your car definitely has to my knowledge the highest WHP for any street NA S65.

As for the dynos, i should look into my stuff. If i find my sheet i will scan and PM it for you. (I'm 3000 kms away from home)

Alekshop · 11-11-2014, 01:13 PM

Quote:

Originally Posted by Soorena

Engine dyno of course. The engines i mentioned all run on high end standalone ecu's such as Syvecs, KMS, Pectel etc... The Judd engine idles at ~3,000 RPM. My pistons are 13.5:1 for example, tuned for 114 octane. Definitely not what you call street engines.

I apologize if it sounded i was taking away anything from your build at first glance, your car definitely has to my knowledge the highest WHP for any street NA S65.

As for the dynos, i should look into my stuff. If i find my sheet i will scan and PM it for you. (I'm 3000 kms away from home)

Cool! Sounds great!

Eminenceo3 · 11-11-2014, 01:20 PM

congrats! beautiful build!!!

Longboarder · 11-11-2014, 01:31 PM

Quote:

Originally Posted by Soorena

Judd makes +650 HP destroked flat plane S65s.

Um...I wanna hear this so bad. Wish they had a vid of it in action.

http://www.engdev.com/engines/judd-hk-v8-lmp2/

ilikebmxbikes · 11-11-2014, 02:09 PM

Quote:

Originally Posted by Longboarder

Um...I wanna hear this so bad. Wish they had a vid of it in action.

http://www.engdev.com/engines/judd-hk-v8-lmp2/

10k redline... wow.

Soorena · 11-11-2014, 02:51 PM

Quote:

Originally Posted by Longboarder

Um...I wanna hear this so bad. Wish they had a vid of it in action.

http://www.engdev.com/engines/judd-hk-v8-lmp2/

Quote:

Originally Posted by ilikebmxbikes

10k redline... wow.

You guys should hear it in person.

Longboarder · 11-11-2014, 02:53 PM

Quote:

Originally Posted by Soorena

You guys should hear it in person.

CPWINCH · 11-11-2014, 07:21 PM

Congrats alekshop. Been following this build since day 1! Love the power and especially the power curve. Hope to see you guys at willowsrpings soon. Gotta go for a ride on a lap

Quote:

Originally Posted by Longboarder

Um...I wanna hear this so bad. Wish they had a vid of it in action.

http://www.engdev.com/engines/judd-hk-v8-lmp2/

holy sh*t... Need a E30 track car with one of these

Richbot · 11-11-2014, 10:32 PM

Holy crap had no idea Judd had an S65 race engine program. Judd makes serious stuff I'm curious what the rationale was for choosing S65, although may be because it's the only reasonably large production, low displacement high rpm dohc v8 show in town and they seem to gravitate toward higher cylinder count with their engines

11-10-2014, 06:38 PM	#23
FogCityM3 Colonel 499 Rep 2,400 Posts Drives: M3 (E90) & Porsche GT3 RS Join Date: Feb 2012 Location: San Francisco iTrader: (0)	Awesome results! I'd love to see the Spark Advance Graph for the stroker using 94 octane.
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11-10-2014, 07:36 PM	#24
C-M2 First Lieutenant 41 Rep 318 Posts Drives: 09 E92 SG M3 Join Date: Oct 2007 Location: Chicago iTrader: (2)	About time you share __________________ Current: 2009 Space Gray e92 M3 - Mod list too long to list Gone: 2004 Jet Black/Black SMG M3
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11-10-2014, 09:27 PM	#26
In33anity Private First Class 87 Rep 159 Posts Drives: M3 Join Date: Jan 2014 Location: Bridgehampton NY iTrader: (1)	Very Cool! Congrats!!!
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11-11-2014, 12:34 AM	#28
Hujan Brigadier General 569 Rep 3,742 Posts Drives: M3 Join Date: Apr 2013 Location: . iTrader: (16)	Very nice results. 1) What's up with that dip in the torque and power curves for the Alekshop stroker compared to the others? 2) I may have missed it, but was this a sleeved build? 3) Did the car have any mods other than the Akrapovic GT4? While still an expensive endeavor, there is some top end to be gained over an FBO M3 even on 91 octane, not to mention the tremendous torque gains down low. I bet this would be a really fun motor to drive on the street and the track. Last edited by Hujan; 11-11-2014 at 12:42 AM..
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11-11-2014, 12:43 AM	#29
e92zero Captain 212 Rep 875 Posts Drives: 2011 E92 BW Join Date: May 2010 Location: somewhere in US iTrader: (1)	Amazing!!! I am hoping to some day do this also.
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11-11-2014, 01:24 AM	#31
Soorena Captain 90 Rep 850 Posts Drives: M3 6MT Join Date: Dec 2011 Location: Paris iTrader: (0) Garage List 2013 BMW S1000RR [0.00] 2013 Ferrari 458 [9.66] 2012 Jaguar XJ SWB ... [10.00] 2011 E92 M3 [10.00]	Nice build! Just to clarify this is certainly not the most powerful NA S65. There are quite a few S65 engines into mid to high 500 HP on crank. Judd makes +650 HP destroked flat plane S65s. My friend's KMS engine made 610 HP last time on the dyno using convential cross plane design. My racecar's engine (i'm using the same cams as you) is not finished with tuning, yet made 565 HP. This however is the highest horsepower on a chassis dyno, and probably the most powerful street legal car.
	Appreciate 0 Quote

11-11-2014, 04:06 AM	#32
L4ces Major 337 Rep 1,489 Posts Drives: 2008 E92 M3 Alpine White Join Date: Aug 2010 Location: NJ - NY iTrader: (0) Garage List 2008 M3 [0.00]	Congrats! Have you guys considered superchargIng it? Any thoughts?
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11-11-2014, 01:20 PM	#38
Eminenceo3 Captain 52 Rep 652 Posts Drives: Mineral white E93 Join Date: Feb 2011 Location: Santa Clarita CA iTrader: (5)	congrats! beautiful build!!! __________________ build thread. http://www.m3post.com/forums/showthr...1#post15672891
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11-11-2014, 10:32 PM	#44
Richbot Major General 2760 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	Holy crap had no idea Judd had an S65 race engine program. Judd makes serious stuff I'm curious what the rationale was for choosing S65, although may be because it's the only reasonably large production, low displacement high rpm dohc v8 show in town and they seem to gravitate toward higher cylinder count with their engines __________________
	Appreciate 0 Quote