Dynod today with 20 inch wheels -hp loss? - Page 2

Technic · 01-27-2013, 09:21 PM

Quote:

Originally Posted by edwinm3

Vossens are heavy as sh^*

... we have a winner.

RingMeister01 · 01-28-2013, 08:32 AM

The hp loss is related to the increase in centrifugal force of the 20" wheels. The greater diameter of the wheel the further the weight of that wheel is away from it's center, requiring more force to spin or stop that object. In essence, a heavy 18" wheel would be easier to spin than a lighter 21" wheel. You dig?

Andrew@ActiveAutowerke · 01-28-2013, 10:14 AM

Quote:

Originally Posted by RingMeister01

The hp loss is related to the increase in centrifugal force of the 20" wheels. The greater diameter of the wheel the further the weight of that wheel is away from it's center, requiring more force to spin or stop that object. In essence, a heavy 18" wheel would be easier to spin than a lighter 21" wheel. You dig?

This is true. Our 20's are the same weight as the stock wheels and produce 20 whp less.

edwinm3 · 01-28-2013, 02:06 PM

Quote:

Originally Posted by Andrew@ActiveAutowerke

Quote:

Originally Posted by RingMeister01

The hp loss is related to the increase in centrifugal force of the 20" wheels. The greater diameter of the wheel the further the weight of that wheel is away from it's center, requiring more force to spin or stop that object. In essence, a heavy 18" wheel would be easier to spin than a lighter 21" wheel. You dig?

This is true. Our 20's are the same weight as the stock wheels and produce 20 whp less.

You guys wouldn't care about that Andrew, your car is a beast

Andrew@ActiveAutowerke · 01-28-2013, 02:25 PM

Quote:

Originally Posted by edwinm3

You guys wouldn't care about that Andrew, your car is a beast

Tell that to the critics on m3post

Every hp matters!

Chriskm3 · 01-28-2013, 03:14 PM

Quote:

Originally Posted by edwinm3

Vossens are heavy as sh^*

Weight difference between 20 inch vossen with tires and 18 volk with tires were 6 lbs per rear wheel

edwinm3 · 01-28-2013, 03:23 PM

Quote:

Originally Posted by Andrew@ActiveAutowerke

Quote:

Originally Posted by edwinm3

You guys wouldn't care about that Andrew, your car is a beast

Tell that to the critics on m3post

Every hp matters!

I know lol

Vic311 · 01-28-2013, 03:47 PM

Quote:

Originally Posted by RingMeister01

The hp loss is related to the increase in centrifugal force of the 20" wheels. The greater diameter of the wheel the further the weight of that wheel is away from it's center, requiring more force to spin or stop that object. In essence, a heavy 18" wheel would be easier to spin than a lighter 21" wheel. You dig?

Part true but the heavier wheel will also have a bigger moment of inertia (harder to get it accelerating) so you will expend more power which translates to a dyno loss

Quote:

Originally Posted by edwinm3

Vossens are heavy as sh^*

Quote:

Originally Posted by Technic

... we have a winner.

Heavy wheels are a tell-tale sign of cheap casting methods

RingMeister01 · 01-28-2013, 03:52 PM

Quote:

Originally Posted by Andrew@ActiveAutowerke

This is true. Our 20's are the same weight as the stock wheels and produce 20 whp less.

This is the reason trackday guys and race teams will use the lightest and smallest wheels possible, that the brake system allow. Once upon a time, when I had my GT3, the serious guys would spend thousands and thousands on titanium wheel nuts by an italian company NCR and carbon fiber wheels by Oakley. Unsprung mass has the single most major effect on a cars performance in every way, accel, braking, turning, power loss..

Mr.Metak2you · 01-28-2013, 04:18 PM

Want 6.5% increase torque? Stick with the 18's and go to a lower profile and lighter tire, you will see about the same results as switching out your LSD for a 4.1 at a fraction of the cost! (6MT)

Andrew@ActiveAutowerke · 01-28-2013, 04:50 PM

Quote:

Originally Posted by Mr.Metak2you

Want 6.5% increase torque? Stick with the 18's and go to a lower profile and lighter tire, you will see about the same results as switching out your LSD for a 4.1 at a fraction of the cost! (6MT)

This !

Daft · 01-28-2013, 07:51 PM

For what it's worth I dynoed 520 whp on 20" HREs while I had the ESS VT2-575 (I'm on the VT2-600 now).

Dellort_M3 · 01-28-2013, 09:05 PM

Which kit?

Chriskm3 · 02-01-2013, 05:21 PM

Quote:

Originally Posted by Daft

For what it's worth I dynoed 520 whp on 20" HREs while I had the ESS VT2-575 (I'm on the VT2-600 now).

Why upgrade from 575 to a 600 kit?

Andrew@ActiveAutowerke · 02-01-2013, 05:30 PM

Quote:

Originally Posted by Daft

For what it's worth I dynoed 520 whp on 20" HREs while I had the ESS VT2-575 (I'm on the VT2-600 now).

Have a baseline with the 20's ?

HoodR$CH · 02-01-2013, 10:42 PM

Quote:

Originally Posted by Andrew@ActiveAutowerke

Have a baseline with the 20's ?

Andrew, what 18" wheels will clear your new BBK kit for those of us who plan on buying it?

Andrew@ActiveAutowerke · 02-01-2013, 11:54 PM

Quote:

Originally Posted by AASuperchargedE92

Andrew, what 18" wheels will clear your new BBK kit for those of us who plan on buying it?

Depends on the size of the brakes you choose.

HoodR$CH · 02-02-2013, 12:39 AM

Quote:

Originally Posted by Andrew@ActiveAutowerke

Depends on the size of the brakes you choose.

I was jumping the gun and assuming that the prototype brakes on Blitzkrieg would be released soon

Superfly_M3 · 02-02-2013, 02:00 PM

Quote:

Originally Posted by Chriskm3

Why upgrade from 575 to a 600 kit?

From what I understand, the 575 and the 600 kit share the same injectors, only the tune would have to change. The 625+ kits have upgraded injectors.

Chriskm3 · 02-02-2013, 02:49 PM

Quote:

Originally Posted by Superfly_M3

From what I understand, the 575 and the 600 kit share the same injectors, only the tune would have to change. The 625+ kits have upgraded injectors.

Pullies and a tune fore sure.

Bmw135er · 02-04-2013, 08:35 PM

No one has mentioned tire differences causing a reduction in dyno results here. Tires with additional siping in them cost power as well. Back when I had my Evo it dropped 15hp switching from Pilot Sports to Conti All Seasons. No changes in equipment, and same day dyno results. I swapped them just for fun, same wheel fitments.
Often times guys and girls swap wheels but also run different tires, which will vary the results as well.

CanAutM3 · 02-04-2013, 08:56 PM

Quote:

Originally Posted by Bmw135er

No one has mentioned tire differences causing a reduction in dyno results here. Tires with additional siping in them cost power as well. Back when I had my Evo it dropped 15hp switching from Pilot Sports to Conti All Seasons. No changes in equipment, and same day dyno results. I swapped them just for fun, same wheel fitments.
Often times guys and girls swap wheels but also run different tires, which will vary the results as well.

Very good point

01-28-2013, 04:18 PM	#32
Mr.Metak2you Brigadier General Drives: LEXUS LS(DailyDriver) Join Date: Nov 2007 Location: Astral Projecting: ∞ 23.516 -122 02.625 0242.101 ĕv'rē-hwâr' Posts: 4,386 iTrader: (11) Garage List 2013 BMW M3 [0.00] 2011 1M Coupe (Sold) [4.30] 2008 E90 M3 (Sold) [4.30] 2007 Z4 Mcpe (Sold) [5.00] 2005 BMW M3 (Sold) [5.00]	Want 6.5% increase torque? Stick with the 18's and go to a lower profile and lighter tire, you will see about the same results as switching out your LSD for a 4.1 at a fraction of the cost! (6MT) __________________

01-28-2013, 07:51 PM	#34
Daft Captain Drives: 2011 ZCP E92 M3 & 2003 E46 M3 Join Date: Jan 2009 Location: Ontario, Canada Posts: 819 iTrader: (1) Garage List 2011 BMW M3 [4.83] 2003 BMW M3 [5.00]	For what it's worth I dynoed 520 whp on 20" HREs while I had the ESS VT2-575 (I'm on the VT2-600 now). __________________ 2011 M3 ZCP \| ESS SUPERCHARGED \| AKRAPOVIC EVOLUTION \| 20" HRE P40 \| BREMBO BBK \| B&G SPRINGS

01-28-2013, 09:05 PM	#35
Dellort_M3 First Lieutenant Drives: 2011 E92 M3 Join Date: Dec 2011 Location: Toronto, ON Posts: 398 iTrader: (0)	Which kit? __________________ 2011 Alpine White/Fox Red 6MT E92 M3 \| Active Stage 2 w/Meth \| KW Clubsport \| OSS \| Challenge Front Lip \| Vorsteiner Type 2 Rear Diffuser and Bootlid \| Brembo \| Recaro \| Akrapovic Slip-On \| Challenge Race+ X-Pipe \| Vossen CV3 \| OEM 359M \| TE37SL

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01-28-2013, 08:32 AM	#24
RingMeister01 Danger, Play & Profession Drives: '13 Frozen Gray M3 Join Date: Dec 2012 Location: Long Island, NY Posts: 1,076 iTrader: (0) Garage List 2013 BMW M3 [0.00]	The hp loss is related to the increase in centrifugal force of the 20" wheels. The greater diameter of the wheel the further the weight of that wheel is away from it's center, requiring more force to spin or stop that object. In essence, a heavy 18" wheel would be easier to spin than a lighter 21" wheel. You dig?

02-04-2013, 08:35 PM	#43
Bmw135er Major Drives: E90 M3 Join Date: May 2011 Location: Colorado Springs Posts: 1,378 iTrader: (9)	No one has mentioned tire differences causing a reduction in dyno results here. Tires with additional siping in them cost power as well. Back when I had my Evo it dropped 15hp switching from Pilot Sports to Conti All Seasons. No changes in equipment, and same day dyno results. I swapped them just for fun, same wheel fitments. Often times guys and girls swap wheels but also run different tires, which will vary the results as well.