After all, the biggest "problem" with the bimmer diesels is that they top out around 4000RPMs... Just imagine a chipped 330d that could do 5500RPMs (or even 6500)... Imagine how fast THAT would be.
Nah... I think this engine would weigh too much for the 3-series anyway. Why not get a 330d and have Nowack tune it to 220HP?
I was thinking that with such a low drop off in the torque curve, you finally let the clutch all the way out just about the same time to shift to 2nd. A longer first gear might be more fun.Nick325xiT said:Might be interesting to try...
I don't think the time it takes to shift will really slow the car down that much, though.
That said, Alpina's D10 Biturbo IS faster to 60 with an automatic. Powerful diesels are probably particularly good for automatics thanks to their torque curves.
Nothing can really compensate for the engine's inability to rev. So with a CVT, the transmission tries to keep the engine spinning at a speed where maximum torque is produced. As the vehicle accelerates, the tranny continuously moves to a taller ratio. The tall gear ratio effectively reduce the torque transmitted to the wheels.Adrian 330Ci'01 said:How about diesel mated to a CVT? :yikes:
This way, the maximum torque is always put to the wheels. That could compensate for the relatively low redline.
I believe that part of BMW's answer to this is to turbo charge both their 4 and 6 cylinder engines, and at least in the case of my 4 cylinder diesel, I have 4 valves per cylinder. Not sure about the 6.Jspeed said:That's physically impossible b/c diesel fuel inherently burns more slowly. Since power is a function of torque times revs, the only way to make more powerful diesel engines is to make more torque.
I think you missed my post saying that it's the chemical property of diesel fuel that it cannot combust as quickly as gasoline. It is not a mechanical issue.Now if they sped-up development of the camless engine, they may be able to increase the engine speed.
Yes I agree, but there are many things that can be done to improve combustion with fuel injectors and timing, multiple shots, etc. The camless engine will help with that.Jspeed said:
I think you missed my post saying that it's the chemical property of diesel fuel that it cannot combust as quickly as gasoline. It is not a mechanical issue.
Well, I drive a 6-cylinder (4 valves per cylinder) 325tds and all I can say that this car isn't underpowered at all. Ok, it does 0-60 in about 10s, but overtaking somebody goes very fast if you keep the revs quite high. Currently it only has 143hp, but I'm planning to get it tuned to a acceptable 173hp. Everybody keeps telling me I'm crazy because they allready call my car fast enough. Don't know myself, maybe I got used to it allready. :lmao:Nick325xiT 5spd said:Besides, the BMW diesel sixes make an incredible sound at high revs. The 2.5 was rather pathetically underpowered in the Land Rover Doscovery, though. 0-60 in something like 17 seconds. We weren't EVER able to pass. The diesel scream was quite something, though.
Yep. I do enjoy listening to the sound of the turbo whine! Very cool. :thumb:Polle325 said:This weekend me and a friend of mine parked my car under a bridge, put the car in neutral and hit the accelerator. The engine makes a incredible sound at high revs. When the needle goes past 2000rpm, the turbo comes out to play and goes on whisteling till 5000rpms. It almost sounds like a race-car.