M Coupe Horsepower

IronZ4M · 07-08-2011, 02:10 AM

Guys wanna ask how much of rear wheel power hahttp://www.zpost.com/forums/showthread.php?p=9982006#post9982006ve you gained on your Z4M with your full mods?

Beedub · 07-08-2011, 04:13 AM

i have 450rwhp..... @ 8psi boost.

Z4-VILLA · 07-08-2011, 05:06 AM

I have no idea.....Euro Headers, o2 relocation and RPI exhaust....no tune.....um, I dont really have a clue...

Beedub · 07-08-2011, 06:03 AM

Quote:

Originally Posted by Z4-Villalona

I have no idea.....Euro Headers, o2 relocation and RPI exhaust....no tune.....um, I dont really have a clue...

a tune would bring out your mods nicely.... get to it mayynnn!!!

z4mnyc · 07-08-2011, 06:52 AM

300 with the Supersprint V1 stepped headers and current mods listed below. Haven't dynoed with the Euro headers. When I do I'll post both graphs.

F360C · 07-08-2011, 07:02 AM

I put down 310rwhp with my mods and the same day an E46 M3 with just a catback put down 278rwhp.... So a rough guess with my mods i gained about 32rwhp

IronZ4M · 07-08-2011, 08:08 AM

I'm wondering how much I'll gain with my mods: it's Euro and I have SS X pipe and Race SS mufflers and I'm going to order ESS Flash and drop an air filter and RPI scoop etc... I'm comparing my car to My cousin 135i his car has a down pipe, JB4, BMS filters, and Active BOV anyway I had a race with him while My car is only having SS X pipe and SS Race mufflers and 20'' wheels

. we were racing on 60 km/h up to 180 km/h both on second gear and the distance was almost 2 cars and he's still going more. If I had that mods that I didnt have them yet there will be a difference or not? what do you think?

Beedub · 07-08-2011, 08:34 AM

your 20s will be loosing you serious performance....... at most you want a nice lightweight 19, but for max performance 18 is perfect on this car..... or for a compromise a nice lightweight 19 will give you better look and performance, tyres will be expensive @ this size point.

IronZ4M · 07-08-2011, 10:10 AM

Quote:

Originally Posted by Beedub

your 20s will be loosing you serious performance....... at most you want a nice lightweight 19, but for max performance 18 is perfect on this car..... or for a compromise a nice lightweight 19 will give you better look and performance, tyres will be expensive @ this size point.

what is most light weight wheel 19'' and 18''?

BlackMoupe · 07-08-2011, 12:00 PM

A very good friend of mine has a 135 (JB4, Downpipes)....Our cars don't stand a chance in a straight line. We're a torqueless wonder compared to those torque monsters.

gcochard · 07-08-2011, 12:05 PM

Quote:

Originally Posted by IronZ4M

what is most light weight wheel 19'' and 18''?

You want to go with forged wheels, they will be the lightest. (and most expensive)

IronZ4M · 07-08-2011, 12:49 PM

Quote:

Originally Posted by cliffhopper

You want to go with forged wheels, they will be the lightest. (and most expensive)

actually if I'm going for serious race I'm going to use the OEM wheels and happy with them. coz If i was going for high hourspower the OEM wheels will be enough put for extra mod I'll buy light weight wheels but for now a wanna make a full mod without any force injection for now.

Wild M · 07-10-2011, 12:46 PM

I make about 365 rwhp with the VT1-445. The only other mod are BBS LMR's, 19 inch with PS2s (245 front, 275 rear).

MIKe86 · 07-10-2011, 04:17 PM

Quote:

Originally Posted by F360C

I put down 310rwhp with my mods and the same day an E46 M3 with just a catback put down 278rwhp.... So a rough guess with my mods i gained about 32rwhp

Full ss exhaust, ess tune, and an intake?

mfanatic325 · 07-10-2011, 08:07 PM

Quote:

Originally Posted by MIKe86

Full ss exhaust, ess tune, and an intake?

That sounds about right.

I did a dynojet quite a few months back (sans the section1 and section2), and got 295rwhp. This was without any fans up front to feed the motor.
Relevant Mods at the time:
AA Tune, BMC filter, JVT headers, stock section1, stock x-pipe, SS race mufflers, 3.91 ring & pinion, 19" Volks.

I bet I'm now around the same power point as him, but obviously hoping for as much as possible

Relevant Mods added:
uncatted SS section1, SS x-pipe, and RPi scoop

Hopefully a fan will help the scoop and motor maximize their potentials

I'm expecting at least 305rwhp on a dynojet, and/or at least 315rwhp on a dynapack.

ZooyorQ · 07-15-2011, 01:38 AM

My friends should be close to 550rwhp when completed in about a month or so.

BookerM3 · 07-15-2011, 08:17 AM

Quote:

Originally Posted by mfanatic325

Hopefully a fan will help the scoop and motor maximize their potentials

I'm expecting at least 305rwhp on a dynojet, and/or at least 315rwhp on a dynapack.

I found that the Dynapack dynos usually read approx. 8% lower HP than Dynojets.

At least on the local dyno's I've been on.

mfanatic325 · 07-17-2011, 06:30 AM

Quote:

Originally Posted by BookerM3

I found that the Dynapack dynos usually read approx. 8% lower HP than Dynojets.

At least on the local dyno's I've been on.

^ It's odd, because my personal experience has been opposite of that.
But I've also heard rumors about this too, so I'm confused.

Although, if you really think about it...logically-speaking, one should lose more power by having to transfer through a pair (or more) wheels/tires, especially when combating any frictional resistance from the rollers.
And on the other side of the equation, we have the DynaPack, which hooks up directly to the hub, so there's practically no losses to be had. It all depends on what you use for baseline really...and as long as you stay consistent with it throughout the modding process. Kind of like a controlled environment; or as best as you can at least.

IronZ4M · 07-17-2011, 06:58 AM

Quote:

Originally Posted by ZooyorQ

My friends should be close to 550rwhp when completed in about a month or so.

what is that mod?

IronZ4M · 07-17-2011, 07:31 AM

Quote:

Originally Posted by Wild M

I make about 365 rwhp with the VT1-445. The only other mod are BBS LMR's, 19 inch with PS2s (245 front, 275 rear).

so you are not running any other mods. stoke Exhaust?

BookerM3 · 07-17-2011, 10:05 AM

Quote:

Originally Posted by mfanatic325

^ It's odd, because my personal experience has been opposite of that.
But I've also heard rumors about this too, so I'm confused.

Although, if you really think about it...logically-speaking, one should lose more power by having to transfer through a pair (or more) wheels/tires, especially when combating any frictional resistance from the rollers.
And on the other side of the equation, we have the DynaPack, which hooks up directly to the hub, so there's practically no losses to be had. It all depends on what you use for baseline really...and as long as you stay consistent with it throughout the modding process. Kind of like a controlled environment; or as best as you can at least.

I would agree with everything you mention if both Dynos were the same type,
however; Dynojets are an inertia type and Dynapack uses hydraulic pressure.
How they calculate / measure power is very different.

Maybe the gap in your results and mine are associated to how the Dynapack was set up.
I have seen 10 HP increase on Dynopacks by simply adjusting them to accellerate more
slowly on an power pull.

One thing I didn't like about Dynojets is that drivetrain weight affects the
numbers. If you install light weight Wheels, flywheel or rotors you HP will go up.

07-08-2011, 02:10 AM	#1
IronZ4M First Class M 20 Rep 217 Posts Drives: Z4M Coupe, E36 Coupe Join Date: Jul 2010 Location: Saihat iTrader: (0) Garage List 2007 BMW Z4 M Coupe [8.33]	M Coupe Horsepower Guys wanna ask how much of rear wheel power hahttp://www.zpost.com/forums/showthread.php?p=9982006#post9982006ve you gained on your Z4M with your full mods? __________________ '07 Z4MC l Alpine White l Supersprint Race Exhaust l Supersprint X Pipe l OEM Carbon fiber Spoiler l H&R Springs l Vossen VF051 l G-Power SK I 415 rwhp l RPI Scoop l ///M Performance Knop. Last edited by IronZ4M; 07-08-2011 at 12:52 PM..
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07-08-2011, 04:13 AM	#2
Beedub Major General 423 Rep 5,328 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	i have 450rwhp..... @ 8psi boost. __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
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07-08-2011, 05:06 AM	#3
Z4-VILLA Banned 111 Rep 2,460 Posts Drives: Z4M Hardtop Roadster Join Date: Feb 2009 Location: Classified iTrader: (0)	I have no idea.....Euro Headers, o2 relocation and RPI exhaust....no tune.....um, I dont really have a clue...
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07-08-2011, 06:52 AM	#5
z4mnyc Private First Class 14 Rep 191 Posts Drives: Z4 M Coupe Join Date: Feb 2011 Location: New York iTrader: (2)	300 with the Supersprint V1 stepped headers and current mods listed below. Haven't dynoed with the Euro headers. When I do I'll post both graphs. __________________ \| Z4MC \| KW Clubsport \| BBS-RGR 19 + Bridgestone RE11 \| BBS-RGR 18 + Hoosier R6 \| Sparco DTM RS \| Vorshlag mounts \| Braille battery \| Euro Headers \| Supersprint exhaust \| Stoptech lines \| Stongstrut \| TCK camber arms \| UUC SSK \| APR GT-200 wing & splitter \| ESS Tune \| Speedware Motorsports custom roll cage \| Schroth harness \|
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07-08-2011, 07:02 AM	#6
F360C Major 366 Rep 1,373 Posts Drives: E86 S54 Join Date: Apr 2006 Location: Hoboken, NJ iTrader: (2)	I put down 310rwhp with my mods and the same day an E46 M3 with just a catback put down 278rwhp.... So a rough guess with my mods i gained about 32rwhp __________________ 07 Z4 M Coupe AW/IR
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07-08-2011, 08:08 AM	#7
IronZ4M First Class M 20 Rep 217 Posts Drives: Z4M Coupe, E36 Coupe Join Date: Jul 2010 Location: Saihat iTrader: (0) Garage List 2007 BMW Z4 M Coupe [8.33]	I'm wondering how much I'll gain with my mods: it's Euro and I have SS X pipe and Race SS mufflers and I'm going to order ESS Flash and drop an air filter and RPI scoop etc... I'm comparing my car to My cousin 135i his car has a down pipe, JB4, BMS filters, and Active BOV anyway I had a race with him while My car is only having SS X pipe and SS Race mufflers and 20'' wheels. we were racing on 60 km/h up to 180 km/h both on second gear and the distance was almost 2 cars and he's still going more. If I had that mods that I didnt have them yet there will be a difference or not? what do you think? __________________ '07 Z4MC l Alpine White l Supersprint Race Exhaust l Supersprint X Pipe l OEM Carbon fiber Spoiler l H&R Springs l Vossen VF051 l G-Power SK I 415 rwhp l RPI Scoop l ///M Performance Knop.
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07-08-2011, 08:34 AM	#8
Beedub Major General 423 Rep 5,328 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	your 20s will be loosing you serious performance....... at most you want a nice lightweight 19, but for max performance 18 is perfect on this car..... or for a compromise a nice lightweight 19 will give you better look and performance, tyres will be expensive @ this size point. __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
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07-08-2011, 12:00 PM	#10
BlackMoupe Mouper 114 Rep 1,064 Posts Drives: _____ Join Date: Apr 2010 Location: _____ iTrader: (1)	A very good friend of mine has a 135 (JB4, Downpipes)....Our cars don't stand a chance in a straight line. We're a torqueless wonder compared to those torque monsters.
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07-10-2011, 12:46 PM	#13
Wild M Private 7 Rep 84 Posts Drives: 2006 Z4M SuperCharged Join Date: Apr 2010 Location: Mississauga iTrader: (0) Garage List 2006 Z4M Roadster [8.24] 2012 BMW 335i Sport ... [0.00]	I make about 365 rwhp with the VT1-445. The only other mod are BBS LMR's, 19 inch with PS2s (245 front, 275 rear).
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07-15-2011, 01:38 AM	#16
ZooyorQ Private First Class 11 Rep 147 Posts Drives: BMW M3 Join Date: Sep 2010 Location: Bay Area iTrader: (0)	My friends should be close to 550rwhp when completed in about a month or so.
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