Pics- Dinan vs. OEM Flywheel

1clean335i · 12-01-2008, 07:45 PM

Got a chance to see a Dinan flywheel, so I should I would share some crappy camera phone pics... Im sure you all know its just an OEM flywheel thats shaved and rebalanced... Ill let the pics to the talking....

oddjob2021 · 12-01-2008, 08:30 PM

cool, thanks for sharing!

Driver72 · 12-01-2008, 08:38 PM

Not sure how much a lighter flywheel will do for these cars, but, at Dinan prices, it probably wouldn't be worth it anyway.
But if it's under a grand, gives 10+ rwhp and quickens the throttle response, spool up and so forth a bit, it will probably sell.
But if it's $2k+ and gives only 5-7 rwhp (as I'd guess) then they won't sell many.

BTW, in the side by side pic with what I'd assume is the OEM one, the Dinan one looks neither smaller nor lighter.

Sniz · 12-01-2008, 08:38 PM

whats the price difference vs stock? weight savings over stock?

BoostedBMW · 12-01-2008, 09:16 PM

Hmmm... interesting. So, what is the weight difference? It kind of makes you feel even more shafted. I had no idea that it was a modified OEM flywheel.

roadkillrob · 12-02-2008, 08:31 AM

Well I am no expert, but that sort of looks like a total rip off!

Rob

ArmyBimmerDude · 12-02-2008, 08:56 AM

Yeah, I'm going to guess the one on the left is the Dinan modified flywheel, but really this is a joke. Does Dinan do anything more than rebadging parts from other companies and selling them at a higher price? I'd love to know the numbers on this as well. I wouldn't bet on it costing $1k.

ybbiz34 · 12-02-2008, 09:14 AM

This flywheel has been out for a long time. I think they stuck with just machining mass off of the OEM flywheel to reduce the possibility of having annoying noise issues with constructing an entirely new one.

Unless you have deep pockets, or you are unhealthily obsessed with your car, this mod doesn't seem worth it at all IMHO.

NatesGr8 · 12-02-2008, 09:20 AM

If you look at the 3rd pic down there is quite a bit of metal shaved off from the outer edge. I don't think there will be much horsepower gain, but with the less rotational mass i would expect the throttle response to be alot better. I would love to know the actual weight difference...and even more so how much of the weight savings is from the outside edge. Anyone know what Dinan claims the difference is?

Edit...they also probably went with a modified stock flywheel b/c its a dual mass flywheel and they didn't want to deal with the headache's of making an entirely new dual mass flywheel.

ianthegreat · 12-02-2008, 04:22 PM

so that's what makes my car so damn embarrassing..

Sal@AUTOcouture · 12-02-2008, 04:39 PM

Quote:

Originally Posted by ianthegreat

so that's what makes my car so damn embarrassing..

huh?

TheAcAvenger · 12-02-2008, 04:42 PM

It's $2300.

http://www.dinancars.com/store/home.php?cat=689

What's disturbing is that they claim a 23% reduction in rotational inertia.

Now I'm not a physicist here, but there's no way you're getting 23% by shaving and rebalancing.

lyndon_h · 12-02-2008, 05:14 PM

Dinan has some overpriced stuff all "justified" under the reassurance of keeping your warranty.

O-cha · 12-02-2008, 05:20 PM

Quote:

Originally Posted by TheAcAvenger

It's $2300.

http://www.dinancars.com/store/home.php?cat=689

What's disturbing is that they claim a 23% reduction in rotational inertia.

Now I'm not a physicist here, but there's no way you're getting 23% by shaving and rebalancing.

Rotational inertia, not weight, all the weight is from the outer diameter.

Clever wording.

Bastards.

Just wait for JB racing, they will have one eventually for sure.

GeorgiaTech335coupe · 12-02-2008, 06:01 PM

Quote:

Originally Posted by TheAcAvenger

It's $2300.

http://www.dinancars.com/store/home.php?cat=689

What's disturbing is that they claim a 23% reduction in rotational inertia.

Now I'm not a physicist here, but there's no way you're getting 23% by shaving and rebalancing.

It's very possible they can get a 23% reduction in rotational inertia, which is what matters as the flywheel spins. The generic equation is Mass*radius^2/2 for a solid disk. Since the weight is coming off the outside the effect is greater. A 6% reduction in radius of a solid disk will yield a ~23% reduction in rotational inertia. Granted that is an oversimplification, but it can justify the rationality.

addy85 · 12-02-2008, 06:02 PM

2300????? Man their nuts

roadkillrob · 12-03-2008, 09:49 AM

I think you could get a machine shop to do the same thing for a couple hundred bucks!

1clean335i · 12-03-2008, 11:41 AM

Quote:

Originally Posted by roadkillrob

I think you could get a machine shop to do the same thing for a couple hundred bucks!

my thoughts exactly... 2300 is ALOT of labor to shave and balance a flywheel...

Sal@AUTOcouture · 12-03-2008, 12:00 PM

Quote:

Originally Posted by 1clean335i

my thoughts exactly... 2300 is ALOT of labor to shave and balance a flywheel...

ur forgetting the 80% DINAN tax...duh

M3to335 · 12-03-2008, 12:05 PM

WTF

So your telling me I can rip out my flywheel, bring it to work and machine off the lip for free and get the same affect as a $2300 mod? hahaha.

Sniz · 12-03-2008, 12:18 PM

Quote:

Originally Posted by M3to335

WTF

So your telling me I can rip out my flywheel, bring it to work and machine off the lip for free and get the same affect as a $2300 mod? hahaha.

I think you have to do it now....keep us updated!

Mooreski · 12-03-2008, 02:45 PM

Quote:

Originally Posted by addy85

2300????? Man their nuts

Man their nuts like one would man a battle station, or......

12-01-2008, 07:45 PM	#1
1clean335i Perf BMW mag issue 147, 159 414 Rep 6,803 Posts Drives: Project Estoril Join Date: Feb 2007 Location: Miami, FL iTrader: (31) Garage List 2013 335i M-sport [0.00] 2011 X5 xdrive35i M ... [0.00] 2009 335i M-sport [0.00] 07' 335i Sedan [0.00]	Pics- Dinan vs. OEM Flywheel Got a chance to see a Dinan flywheel, so I should I would share some crappy camera phone pics... Im sure you all know its just an OEM flywheel thats shaved and rebalanced... Ill let the pics to the talking.... Attached Images __________________ '13 Estoril Blue 335i M-sport *Don't PM me!* Message me here- http://www.facebook.com/ProjectEstoril
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12-01-2008, 08:30 PM	#2
oddjob2021 ASR Turbos+LSD+Meth= :D 73 Rep 1,517 Posts Drives: E92 335i Join Date: May 2007 Location: Miami, FL iTrader: (0) Garage List 2007 E92 335i [0.00]	cool, thanks for sharing! __________________ 2007 335i Coupe Mods: Check the Garage
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12-01-2008, 08:38 PM	#3
Driver72 Brigadier General 327 Rep 4,484 Posts Drives: 335i - to new owners now. Join Date: Dec 2006 Location: California iTrader: (0)	Not sure how much a lighter flywheel will do for these cars, but, at Dinan prices, it probably wouldn't be worth it anyway. But if it's under a grand, gives 10+ rwhp and quickens the throttle response, spool up and so forth a bit, it will probably sell. But if it's $2k+ and gives only 5-7 rwhp (as I'd guess) then they won't sell many. BTW, in the side by side pic with what I'd assume is the OEM one, the Dinan one looks neither smaller nor lighter.
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12-01-2008, 08:38 PM	#4
Sniz Lieutenant General 654 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	whats the price difference vs stock? weight savings over stock? __________________
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12-01-2008, 09:16 PM	#5
BoostedBMW Moderator 132 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	Hmmm... interesting. So, what is the weight difference? It kind of makes you feel even more shafted. I had no idea that it was a modified OEM flywheel. __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
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12-02-2008, 08:31 AM	#6
roadkillrob Major General 860 Rep 5,447 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	Well I am no expert, but that sort of looks like a total rip off! Rob __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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12-02-2008, 08:56 AM	#7
ArmyBimmerDude Major General 152 Rep 5,501 Posts Drives: Lola Join Date: Nov 2006 Location: Georgia iTrader: (3) Garage List 02/2007 E92 335i [0.00]	Yeah, I'm going to guess the one on the left is the Dinan modified flywheel, but really this is a joke. Does Dinan do anything more than rebadging parts from other companies and selling them at a higher price? I'd love to know the numbers on this as well. I wouldn't bet on it costing $1k. __________________ 2007 E92 Montego Blue 335i
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12-02-2008, 09:14 AM	#8
ybbiz34 Brigadier General 670 Rep 4,959 Posts Drives: 2023 330i M Sport Join Date: Jul 2007 Location: USA iTrader: (1)	This flywheel has been out for a long time. I think they stuck with just machining mass off of the OEM flywheel to reduce the possibility of having annoying noise issues with constructing an entirely new one. Unless you have deep pockets, or you are unhealthily obsessed with your car, this mod doesn't seem worth it at all IMHO. __________________ Current: '23 G20 M Sport 330i Current: '20 X253 GLC300 SUV Gone: '20 W205 C43 Sedan Gone: '18 W205 C43 Sedan Gone: '13 W204 C63 Sedan
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12-02-2008, 09:20 AM	#9
NatesGr8 Private First Class 3 Rep 164 Posts Drives: 05 Legacy GT Join Date: May 2008 Location: Earth iTrader: (0)	If you look at the 3rd pic down there is quite a bit of metal shaved off from the outer edge. I don't think there will be much horsepower gain, but with the less rotational mass i would expect the throttle response to be alot better. I would love to know the actual weight difference...and even more so how much of the weight savings is from the outside edge. Anyone know what Dinan claims the difference is? Edit...they also probably went with a modified stock flywheel b/c its a dual mass flywheel and they didn't want to deal with the headache's of making an entirely new dual mass flywheel. __________________ JPSIMON's personal mechanic
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12-02-2008, 04:22 PM	#10
ianthegreat Colonel 60 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	so that's what makes my car so damn embarrassing..
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12-02-2008, 04:42 PM	#12
TheAcAvenger Brigadier General 134 Rep 3,132 Posts Drives: 2018 R35 GTR / 2007 E92 335i Join Date: Apr 2006 Location: 757 > Nova > Denver iTrader: (1)	It's $2300. http://www.dinancars.com/store/home.php?cat=689 What's disturbing is that they claim a 23% reduction in rotational inertia. Now I'm not a physicist here, but there's no way you're getting 23% by shaving and rebalancing. __________________ 2018 R35 GT-R Cicio800 \| 2007 E92 335i - RB Turbos, TC Kline DA Coils, HPA M3 Suspension, Quaife LSD, Stoptech BBK, JB4, FuelIT, AR Downpipes, RDSport Quads, Stett OC, Helix IC, Volk TE-37, Vorsteiner V-35, OSS Headlights \| Retired - 2015 F82 M4
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12-02-2008, 05:14 PM	#13
lyndon_h Lieutenant Colonel 40 Rep 1,917 Posts Drives: e90 Join Date: Jan 2007 Location: Madagascar iTrader: (2)	Dinan has some overpriced stuff all "justified" under the reassurance of keeping your warranty.
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12-02-2008, 06:02 PM	#16
addy85 Got beef? 138 Rep 3,646 Posts Drives: E90 335i Join Date: Oct 2007 Location: Arlington Texas iTrader: (4) Garage List 2007 335i [0.00]	2300????? Man their nuts __________________ Special Thanks to AU335
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12-03-2008, 09:49 AM	#17
roadkillrob Major General 860 Rep 5,447 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	I think you could get a machine shop to do the same thing for a couple hundred bucks! __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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12-03-2008, 12:05 PM	#20
M3to335 Whats that smell? 145 Rep 1,790 Posts Drives: Bimmers, duh Join Date: Nov 2006 Location: NC iTrader: (6)	WTF So your telling me I can rip out my flywheel, bring it to work and machine off the lip for free and get the same affect as a $2300 mod? hahaha.
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