S65 with flat plane crank

Checkcaptain · 07-02-2013, 08:26 AM

Just thinking of rebuilding an S65 with a flat plane crank.
Posting here since I like to know if someone has done it already or knows about it, except the P65 engine of the GT2 car.

BMRLVR · 07-02-2013, 09:04 AM

Haven't heard of one yet, but a crank, cams, and someone to write the software are all you will need to do it!

W/// · 07-02-2013, 09:06 AM

Please excuse my ignorance. What would be the benefit?

Gearhead999s · 07-02-2013, 09:20 AM

Quote:

Originally Posted by Checkcaptain

Just thinking of rebuilding an S65 with a flat plane crank.
Posting here since I like to know if someone has done it already or knows about it, except the P65 engine of the GT2 car.

Why would you want to do that?I know that when flat plane cranks were used in American V8's used in Formula 5000 cars the vibration would destroy the chassis but they did sound pretty wild!

RingMeister01 · 07-02-2013, 09:32 AM

Quote:

Originally Posted by Gearhead999s

Quote:

Originally Posted by Checkcaptain

Just thinking of rebuilding an S65 with a flat plane crank.
Posting here since I like to know if someone has done it already or knows about it, except the P65 engine of the GT2 car.

Why would you want to do that?I know that when flat plane cranks were used in American V8's used in Formula 5000 cars the vibration would destroy the chassis but they did sound pretty wild!

Less rotating mass, as it does not require counter weights.

Jonjt · 07-02-2013, 10:38 AM

Quote:

Originally Posted by W///

Please excuse my ignorance. What would be the benefit?

As others have said, less moving mass. But, the engine was not built to handle the increased vibration. I'd think that a flat plane S65 would go boom rather fast. I'm not sure you'd see any real benefit.

GirlsGarage · 07-02-2013, 11:02 AM

Quote:

Originally Posted by Team Plutonium

I would want it for the sound alone!

This

Checkcaptain · 07-02-2013, 12:02 PM

Quote:

Originally Posted by Team Plutonium

I would want it for the sound alone!

True:

But less mass and higher rev are also a win.

Gearhead999s · 07-02-2013, 03:34 PM

The BMW Z4's that run in the ALMS run a normal firing order crank not the flat plane cranks they ran in the M3GTR.Why?Rules?In my opinion I like the sound of the Z4's a lot better than the previous M3GTR with the flat plane crank.

aus · 07-02-2013, 06:38 PM

Quote:

Originally Posted by Gearhead999s

Why would you want to do that?I know that when flat plane cranks were used in American V8's used in Formula 5000 cars the vibration would destroy the chassis but they did sound pretty wild!

To sound like a Ferrari V8? And maybe get up to 8800 rpm?

Richbot · 07-02-2013, 06:42 PM

I think they have to run a production motor now, but with a silhouette car running against production based chassis why stop there? I guess it's a step toward merging GA and ALMS

Gearhead999s · 07-02-2013, 07:09 PM

RingMeister01 · 07-02-2013, 07:50 PM

Quote:

Originally Posted by Gearhead999s

Mother of GOD.

Longwong · 07-02-2013, 08:04 PM

I don't know. An S65 already sounds pretty amazing and will never sound Ferrari V8 largely because of firing order and somewhat the flatplane. But certainly would not go through this trouble on this engine. I actually don't understand why the race car does do (or did do) a flat crank S65 and then they use restrictor plates on the intake??? So the little weight you shave off is it really worth that in a race applications? I guess so but to a road car I don't even think you would be limited by the cross plane crank in terms of making NA hp if you were to build the motor and cams and run it to 9k. I think with built parts naturally aspirated you can gain a ton of power with the cross plane how it is and not much more with a flat plane

Gearhead999s · 07-02-2013, 08:12 PM

Leonardo629 · 07-03-2013, 03:05 AM

man! that Z4 GTE race car sounds really good

Longwong · 07-03-2013, 09:19 AM

http://www.automobilemag.com/feature...13_bmw_z4_gte/

This car uses a traditional cross-plane which is why it is interesting to see peoples perceptions are not always based upon reality.

Sounds like a good loud catless regular m3.

Checkcaptain · 07-03-2013, 03:29 PM

Quote:

Originally Posted by Longwong

http://www.automobilemag.com/feature...13_bmw_z4_gte/

This car uses a traditional cross-plane which is why it is interesting to see peoples perceptions are not always based upon reality.

Sounds like a good loud catless regular m3.

Nobody said that the GTE has a flat plane, but I think I will try it.
Anybody interested in a cross-plane stroker Kit I just received?

s65e90 · 07-03-2013, 03:42 PM

Quote:

Originally Posted by Checkcaptain

Nobody said that the GTE has a flat plane, but I think I will try it.
Anybody interested in a cross-plane stroker Kit I just received?

PM me price and info shipped to the states 33487

Checkcaptain · 07-03-2013, 04:30 PM

Quote:

Originally Posted by s65e90

PM me price and info shipped to the states 33487

I have no PM rights on this board.
I sell crank, rods complete pistons and Head gascets for 9500EUR.

kiln · 07-03-2013, 05:37 PM

specs of the stroke, piston size, and brand/type of rod would be nice. Were you building a 4.4L or 4.6L? Don't you already have a Dinan 4.6L?

Longwong · 07-03-2013, 10:46 PM

Quote:

Originally Posted by Checkcaptain

Nobody said that the GTE has a flat plane, but I think I will try it.
Anybody interested in a cross-plane stroker Kit I just received?

Actually they did-read above a few posts.

07-02-2013, 08:26 AM	#1
Checkcaptain Major 549 Rep 1,179 Posts Drives: BMW M4 GTS Join Date: Jan 2009 Location: Germany iTrader: (0)	S65 with flat plane crank Just thinking of rebuilding an S65 with a flat plane crank. Posting here since I like to know if someone has done it already or knows about it, except the P65 engine of the GT2 car.
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07-02-2013, 09:04 AM	#2
BMRLVR Grease Monkey 295 Rep 2,646 Posts Drives: 2011 E90 M3,1994 Euro E36 M3/4 Join Date: Apr 2006 Location: Fort McMurray, Alberta, Canada iTrader: (3)	Haven't heard of one yet, but a crank, cams, and someone to write the software are all you will need to do it! __________________ 2011 E90 M3 ZCP - Individual Moonstone/Individual Amarone Extended/Individual Piano Black With Inlay:LINK!!! 1994 Euro E36 M3 Sedan - Daytona Violet/Mulberry:LINK!!!
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07-02-2013, 09:06 AM	#3
W/// Lieutenant General 7494 Rep 12,310 Posts Drives: F82GTS, E36/E92M3, Z4M Join Date: Sep 2011 Location: SC iTrader: (13)	Please excuse my ignorance. What would be the benefit? __________________ Current: 16 F82 M4 GTS, Black Sapphire/Black, DCT 08 E92 M3, Sparkling Graphite/Bamboo Beige, 6MT 07 E85 Z4M Roadster, Alpine White/Red, 6MT 99 E36 M3, Techno Violet/Dove Grey, 6MT
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07-02-2013, 03:34 PM	#9
Gearhead999s Major General 817 Rep 7,887 Posts Drives: RR Velar R=Dynamic M2C R1200GS Join Date: Apr 2007 Location: Toronto iTrader: (0)	The BMW Z4's that run in the ALMS run a normal firing order crank not the flat plane cranks they ran in the M3GTR.Why?Rules?In my opinion I like the sound of the Z4's a lot better than the previous M3GTR with the flat plane crank. Last edited by Gearhead999s; 07-03-2013 at 04:23 PM..
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07-02-2013, 06:42 PM	#11
Richbot Major General 2760 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	I think they have to run a production motor now, but with a silhouette car running against production based chassis why stop there? I guess it's a step toward merging GA and ALMS __________________
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07-02-2013, 07:09 PM	#12
Gearhead999s Major General 817 Rep 7,887 Posts Drives: RR Velar R=Dynamic M2C R1200GS Join Date: Apr 2007 Location: Toronto iTrader: (0)
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07-02-2013, 08:04 PM	#14
Longwong Banned 38 Rep 370 Posts Drives: e92 m3 catless Join Date: Jun 2013 Location: USA iTrader: (0)	I don't know. An S65 already sounds pretty amazing and will never sound Ferrari V8 largely because of firing order and somewhat the flatplane. But certainly would not go through this trouble on this engine. I actually don't understand why the race car does do (or did do) a flat crank S65 and then they use restrictor plates on the intake??? So the little weight you shave off is it really worth that in a race applications? I guess so but to a road car I don't even think you would be limited by the cross plane crank in terms of making NA hp if you were to build the motor and cams and run it to 9k. I think with built parts naturally aspirated you can gain a ton of power with the cross plane how it is and not much more with a flat plane
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07-02-2013, 08:12 PM	#15
Gearhead999s Major General 817 Rep 7,887 Posts Drives: RR Velar R=Dynamic M2C R1200GS Join Date: Apr 2007 Location: Toronto iTrader: (0)
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07-03-2013, 03:05 AM	#16
Leonardo629 Lieutenant Colonel 168 Rep 1,792 Posts Drives: 2013 M3 Coupe Join Date: Sep 2006 Location: Taiwan iTrader: (10)	man! that Z4 GTE race car sounds really good
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07-03-2013, 09:19 AM	#17
Longwong Banned 38 Rep 370 Posts Drives: e92 m3 catless Join Date: Jun 2013 Location: USA iTrader: (0)	http://www.automobilemag.com/feature...13_bmw_z4_gte/ This car uses a traditional cross-plane which is why it is interesting to see peoples perceptions are not always based upon reality. Sounds like a good loud catless regular m3. Last edited by Longwong; 07-03-2013 at 09:26 AM..
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07-03-2013, 05:37 PM	#21
kiln Lieutenant 55 Rep 545 Posts Drives: 2011 E90 M3 Join Date: Oct 2010 Location: New Orleans, LA iTrader: (7)	specs of the stroke, piston size, and brand/type of rod would be nice. Were you building a 4.4L or 4.6L? Don't you already have a Dinan 4.6L?
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