V8 M3 at altitude a disappointment....

swamp2 · 10-23-2007, 11:29 AM

Quote:

Originally Posted by joema

Density altitude is a real and standard term, and has been used for many years: http://en.wikipedia.org/wiki/Density_altitude

Thanks, I learn something every day.

Quote:

Originally Posted by joema

According to this test: http://www.m3post.com/forums/showthr...highlight=dyno at sea level the 335i peaks at about 8.5% more torque than the M3. Rather than exceeding the M3 torque over a "much narrower" range, it exceeds M3 torque from about 2,200 rpm to 5,600 rpm. IOW the 335i torque is greater than the M3 over the majority of the captured M3 rev range.

Yes, depends on specs vs. dyno numbers, you still can't deny the importance of the "0 torque" in the 335i above its redline and plenty of torque available for the M3.

Quote:

Originally Posted by joema

IOW at altitude, the 335i torque would exceed the M3 over a broader range than at sea level.

May be true but speculation at this point.

adamr · 10-24-2007, 11:52 AM

Sorry guys here is the pic of the article (my ADSL went AWOL) ... well the second part of it ... showing the times ... the 4.3 sec in gear acceleration was done with an auto so not really considering that time ...

Yes i agree with 888 ... an ///M is an ///M and i have had 3 of them so far ... but its a fcuken nuisance that some dude with his 335i can come next to you, and slowly start pulling away from you at standstill ... (till about 160-170km/h ... that is)

swamp2 · 10-24-2007, 01:37 PM

Quote:

Originally Posted by adamr

Sorry guys here is the pic of the article (my ADSL went AWOL) ... well the second part of it ... showing the times ... the 4.3 sec in gear acceleration was done with an auto so not really considering that time ...

Yes i agree with 888 ... an ///M is an ///M and i have had 3 of them so far ... but its a fcuken nuisance that some dude with his 335i can come next to you, and slowly start pulling away from you at standstill ... (till about 160-170km/h ... that is)

I am not concerned about this at all. Let's simply consider at sea level first.

The ideal gear to pull from 60-120 in the M3 is 3nd gear, not 4th (it will almost pull to 120 in 2nd (so if you are considering 60-116 or so hold on to your seat). 4th on the other hand will be almost bogging the engine. I ran some CarTest simulations to get a time for 60-120 in 3rd and came up with 5.3 seconds. CarTest also predits 60-118 in 2nd at 3.6 seconds. If you have doubts about this amazing software CarTest just search around for various posts on this forum about it. It is quite accurate.

Now how this will translate at higher altitudes - sure it will be quite a bit slower but the in gear thing is still not very fair auto or not in the 335i.

BMWCali · 10-25-2007, 02:17 AM

Quote:

Originally Posted by JEllis

Yeah any NA car at altitude is going to suffer the same way. Even a Z06 is going to lose power. Should be no surprise

I took my car up to 7,000 feet last weekend and didn't notice any loss in power. Maybe that wasn't high enough?

BMWCali · 10-25-2007, 02:19 AM

Quote:

Originally Posted by adamr

Sorry guys here is the pic of the article (my ADSL went AWOL) ... well the second part of it ... showing the times ... the 4.3 sec in gear acceleration was done with an auto so not really considering that time ...

Yes i agree with 888 ... an ///M is an ///M and i have had 3 of them so far ... but its a fcuken nuisance that some dude with his 335i can come next to you, and slowly start pulling away from you at standstill ... (till about 160-170km/h ... that is)

60-120Km/h in 8.9 seconds for the M3 and 4.3 seconds for the 335i.

That's an outrage!

adamr · 10-25-2007, 04:37 AM

Quote:

60-120Km/h in 8.9 seconds for the M3 and 4.3 seconds for the 335i.

i think its a bit unfair cause the 335i is an auto and even if the car is in auto mode it will kick down, so its not fair to compare the 4.3s to the times of the RS4 and M3 ... would have loved for them to have had the car is DS mode and then put the car in 4th and 5th to see what the times are .... really curious to see how the 335i compares against both the RS4 and M3 in gear acceleration ...

adamr · 10-25-2007, 04:39 AM

NB: in gear acceleration of the RS4 though is faster than the M3 in this test ... is this the general consensus in other tests done?

10-24-2007, 11:52 AM	#24
adamr Major 71 Rep 1,032 Posts Drives: 997 GT3 RS Join Date: Dec 2006 Location: Johannesburg iTrader: (0) Garage List 2007 Porsche 997 GT ... [8.50] 2005 Mercedes Benz ... [0.00] 2008 E92 M3 (Bought ... [0.00] 2007 E93 335i conve ... [0.00] 2006 E92 325i Coupe ... [0.00] 2001 E46 M3 (Sold S ... [0.00]	Sorry guys here is the pic of the article (my ADSL went AWOL) ... well the second part of it ... showing the times ... the 4.3 sec in gear acceleration was done with an auto so not really considering that time ... Yes i agree with 888 ... an ///M is an ///M and i have had 3 of them so far ... but its a fcuken nuisance that some dude with his 335i can come next to you, and slowly start pulling away from you at standstill ... (till about 160-170km/h ... that is) __________________ 2007 Porsche 997 GT3 RS \|PCM with NAV and GSM\|Roll Cage\|PCCB\|Xenons\|Sports Chrono Plus\|PASM\|Leather Pack\|Silver Seat-belts\|
	Appreciate 0 Quote

10-25-2007, 04:39 AM	#29
adamr Major 71 Rep 1,032 Posts Drives: 997 GT3 RS Join Date: Dec 2006 Location: Johannesburg iTrader: (0) Garage List 2007 Porsche 997 GT ... [8.50] 2005 Mercedes Benz ... [0.00] 2008 E92 M3 (Bought ... [0.00] 2007 E93 335i conve ... [0.00] 2006 E92 325i Coupe ... [0.00] 2001 E46 M3 (Sold S ... [0.00]	NB: in gear acceleration of the RS4 though is faster than the M3 in this test ... is this the general consensus in other tests done? __________________ 2007 Porsche 997 GT3 RS \|PCM with NAV and GSM\|Roll Cage\|PCCB\|Xenons\|Sports Chrono Plus\|PASM\|Leather Pack\|Silver Seat-belts\|
	Appreciate 0 Quote