Question about the e92 M3 dyno graph

hamann330ci · 06-10-2007, 02:50 PM

I was just wondering how the HP and Tq crosses over at about 3,700 rpm? Shouldn't they be crossing over at 5,250?

Epacy · 06-10-2007, 03:09 PM

Quote:

Originally Posted by hamann330ci

I was just wondering how the HP and Tq crosses over at about 3,700 rpm? Shouldn't they be crossing over at 5,250?

You just read this out of Road & Track?

Reason is different scales on the graph. They do actually cross at 5252.

replicat · 06-12-2007, 06:01 PM

+1

The same question was asked on Road and Track last month and responded to this month...hmm...me thinks someone wants attention.

Or maybe im mean.

m_bazeepaymon · 06-12-2007, 09:44 PM

Quote:

Originally Posted by replicat

+1

The same question was asked on Road and Track last month and responded to this month...hmm...me thinks someone wants attention.

Or maybe im mean.

your mean
lol

13eastie · 06-13-2007, 03:09 AM

This looks like the same graph BMW published in the April press release.

The graphs should only cross at 5252rpm when the torque is given in lbf and the power in horsepower, which must be read from the same scale. BMW, as well as using separate scales for power and torque, has also used SI units - Nm for the torque (and labelled incorrectly both power scales as kW).

This might be consistent with their in-house practices, but it may be no conincidence that this also has the effects on the chart of

a) making the the max power look very high due to the apparent wide gap between the curves on the right hand side

b) making the torque curve look almost horizontal

hamann330ci · 06-13-2007, 09:24 PM

Quote:

Originally Posted by replicat

+1

The same question was asked on Road and Track last month and responded to this month...hmm...me thinks someone wants attention.

Or maybe im mean.

Nah bro it's cool... a buddy of mine that tune cars was lookin at this graph and it didn't appear right to him. That's why we asked about the 5250 crossing over b/c he knows that all HP/TQ graphs should cross around 5250. I just needed a quick explanation to the "odd lookin" graph to clear things up.

I'm debating on whether to get a fully modded 335i vs e92 M3 that's going to be the best bang for my buck. I also have to take insurance cost into consideration on the 2 different models

bullitt5897 · 06-13-2007, 09:39 PM

if you want the best bang for your buck!!! Buy a s2000 go to fiftyfiftyracing.com and order the 2jz-gte swap hehe 750hp and 600tq and less than 3000lbs!!! can you say WAH HAAAAAA!!!

haha i will give you a spreadsheet with all the stuff i plan on doing to the one I am going to make. hehe fun track day car!!

06-10-2007, 02:50 PM	#1
hamann330ci Second Lieutenant Drives: 2002 E46 330ci Join Date: Feb 2007 Location: Metairie, La Posts: 234 iTrader: (1)	Question about the e92 M3 dyno graph I was just wondering how the HP and Tq crosses over at about 3,700 rpm? Shouldn't they be crossing over at 5,250?
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06-12-2007, 06:01 PM	#3
replicat Lieutenant Drives: 40MPG Join Date: Oct 2006 Location: Southern California Posts: 516 iTrader: (0)	+1 The same question was asked on Road and Track last month and responded to this month...hmm...me thinks someone wants attention. Or maybe im mean.

06-13-2007, 03:09 AM	#5
13eastie Lieutenant Drives: 2007 E92 M3 Join Date: Mar 2007 Location: London Posts: 563 iTrader: (0) Garage List 2007 E92 M3 Coupé S ... [0.00]	This looks like the same graph BMW published in the April press release. The graphs should only cross at 5252rpm when the torque is given in lbf and the power in horsepower, which must be read from the same scale. BMW, as well as using separate scales for power and torque, has also used SI units - Nm for the torque (and labelled incorrectly both power scales as kW). This might be consistent with their in-house practices, but it may be no conincidence that this also has the effects on the chart of a) making the the max power look very high due to the apparent wide gap between the curves on the right hand side b) making the torque curve look almost horizontal

06-13-2007, 09:39 PM	#7
bullitt5897 Second Lieutenant Drives: is300 Join Date: Mar 2007 Location: atl Posts: 249 iTrader: (0)	if you want the best bang for your buck!!! Buy a s2000 go to fiftyfiftyracing.com and order the 2jz-gte swap hehe 750hp and 600tq and less than 3000lbs!!! can you say WAH HAAAAAA!!! haha i will give you a spreadsheet with all the stuff i plan on doing to the one I am going to make. hehe fun track day car!!