Sorry, i can't now join this aged old debate (pleased to see it still happens roughly once a month though).

I was a huge defender of the Diesel when i had my DMS 535d M-Sport but i'm over on the dark side now & have no intention of name calling the 535d, as i think they're an awesome vehicle.

As a total aside, SG353D can get round The Ring quicker than me & he was in a 535d & i was in my new M5.

 

Any one tested with meeters if there most effective way to launch is with DS mode or? Some times feel that staring on M2 and shift at 4500-5000 rpm is the most effective way, then I only have one gear change up to 100km/h.

 

Let me tell u a little story about streetraces.
Back in my young days i streetraced a lot. I mean really a lot. For money, for fun, as long as i could race and have the kick. I have driven several cars and most of the time i was the fastes. I even was faster racing more powerful cars or exactly the same cars. And ofcourse i thought my car was superior.
But it was not my car that was faster than theirs, no, i just was the better driver and knew exactly when to hit the gas and change gear, i even learned to change gear without clutching. I had bigger balls, more courage and all these things together made me think my car was superior.

What i want to say is that streetraces are not reliable. Maybe it sounds simple but the most reliable numbers are the numbers given by bmw.
I am not calling u a layer and i believe u when u say u kept up with the M5's. But believe me brother. Let me drive an E39 M5 and i'll whip your ass so hard it hurts.
I found a nice site to compare dragtimes, maybe u already know it but i just found it, dont know about its reliability though.
http://www.dragtimes.com/

 

I have believed you from the start. I did not need to look at the videos. Your results are in the ball park given what I know about the two cars--if you are saying the 645i was in the neighborhood of .5 sec. faster to 62 and continued to pull away thereafter.

 

Yes that's from where i got the 1/4 times earlier on.
Ok sorry for budging in with the E39 M5...forget about it, and yes i think you are right about the driver/car relation.

Anyway...back to the original d-bate there you can't see too much driving involvment...heck 2 guys with automatics, in manual mode, with dsc off and brake torquing a little...how hard can that me and how much of a master can you be to hit the gas. And also from both videos it's clear that we both launched pretty much the same and no one can say uuu that guy launched perfectly and the other is a slouch. Soooo....in conclusion baring in mind that we were almost equal at launches, then from there we both kept the foot on the throttle at max. And there was the outcome...645i was faster INSIGNIFICANT till 150-160km/h speeds up to wich both cars seemed glued and then the 645i was really faster pulling away slowly. How many times do i have to say that? 1/4...umm pretty close if i have a very good start and i jump in front with a nose or half a car i can say we finish equal on the 1/4, if we have equal starts he finishes 1st on the 1/4 with half a car length imo, more than 1/4 the 645i is quicker.
In gear we didn't make a proper test.

 

Exactly that was what it felt like...since we didn't have proper measuring instruments.

 

What comparison is this again?
Like that i can beat you with my 525, if i have a very good start and jump in front with a nose or 5
Ok, just kidding. Lets drop the discussion. I think we made our point, just dont make statements like the above anymore cause they make no sense. Remember my streetrace story.
Regards,

 

Yes ats look at the thread!!!
And indeed gravity works wonders here, cuz probably gravity pulled Bulgaria with us, i dare to say that if it wouldn't have been for bulgaria we would have had our date settled allready (01.01.2007) with our own problems true, but because of your country the communication of the date has been postponed since we managed to evolve a little at some chapters while bulgaria didn't. So in this case you can thank to that imaginary gravity you stupidly keep mentioning.

Bye bye now! Hope not to see you again...

Pls people don't quote him....

 

Very true - for me I think the conclusion is that the 545i and the 645i are faster in a drag than the 535d by a significant amount (in drag racing terms at least) but that the 535d does not embaress itself in this company by any stretch.

I think we pretty much proved this much last time the debate aired.

However, although that amount is significant - it is not so significant that driver reaction time will not be a major issue.

Personally I think bettermakeways race may have been closer than we might have thought cause of the brake torquing. If the 6 series driver only revved to 1500rpm then he would have been nowhere near the peak powerband, whereas the diesel would have been slap bang into it.

Either way - what heartens me about this is that it demonstrates the performance potential of the 535d - diesel power has come a long way if a 3 litre lump (even with 2 turbos) can hold it's own against a V8 (and more significantly a BMW V8).

What disheartens me is the aggressive response to his post.

Don't take it to heart

 

Yep, I think we should be able to discuss what we want anytime without criticism of our discussion preferences. The polite play when one is tired of an issue is to ignore it.

And, I agree mostly with the other things you say. However, personally, brake torquing has never been fruitful for me beyond 1k RPM--even given the current very limited wheel spin capability of my 545i. Even now, if I brake torque above 1k RPM, then I lose time. I thiink only the tiniest amount of wheel spin can help a Step 545i. So, if the 645i had wheel spin of the sort I used to get, or even get now, when brake torquing above 1k, then he would have lost significant time.