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Sorry Brandon you need dyno charts to prove that. 617's reach max torque at 4,400 rpm according to MB. Maybe your mods have raised the rpm that it produces max torque, but thier is no way to no without dyno charts.
Still I don't see the point, even on these cars very best days a plain jane stock G35 or S500, 500E will still spank them. Whats the point they are about class. Running 30 year old engines past the limits isn't a good habit. Bearings, oil pump chains, timing guide's and chains ect all have a lot of time and wear on them. The Finnish guys can afford to blow up a couple of these, and a lot of their engines have bottom end mods as well.
__________________
1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#48
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Here are some fun videos, enjoy!
http://www.mbworld.org/forums/showthread.php?t=132421&highlight=S600+video http://www.mbworld.org/forums/showthread.php?t=93640&highlight=S600+video http://www.mbworld.org/forums/showthread.php?t=134338&highlight=E55+Video http://www.mbworld.org/forums/showthread.php?t=133928&highlight=E55+Video Enjoy the bi turbo V12 fun. Those things will kick in the traction control to over 90mph! Also enjoy the CLS, such a stunning design.
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#49
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Revving my car higher is not to accuire more power/speed or anything of the sort...
...if I wanted a fast car I would go find a different project. I am just posting this stuff so that you guys can see that the 617 can, will, and does rev well past its redline and still makes decent power (atleast in modified form ) Is there some reason you posted videos to gas powered cars in the diesel discussion??? |
#50
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And, I agree.........unless the engne offers maximum HP at rpm's above 4400, you don't get anything from revving it higher. The dropoff in torque is massive. Now, I do believe that the figure M/B cites for maximum torque........2400 rpm..........must be in error. Anyone who drives a 617 would agree that it pulls much stronger at 2800 than it does at 2400. So, it's entirely possible that the maximum horsepower at 4400 rpm may be low by several hundred rpm as well. |
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Those who are more diesel engine savvy know that the "Full Load" adjustment is also known as a "torque capsule" adjustment on other types of injection pumps. This must be kept in mind that when you increase the fuel across the range... Its difficult to explain...easier to understand after an IP is all torn apart on your bench |
#52
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So, the max HP figure is completely artificial and dependent on the fuel cutoff.........without the fuel cutoff you can keep the torque curve reasonably flat well past 4400?? |
#53
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Now the torque, yes I would agree that torque will not remain flat clear to the top however it would be safe to assume that you are widening that band by delivering more fuel at the top/across the band. Sorta like pushing that falloff you feel at 4400 up to about 5200-5300. I would still execpt a reasonable falloff (hell I can feel it start kicking down at about 5250-5500) but I think the main reason you see the sharp torque falloff is due to the fuel cutoff on an IP that is setup for this to happen... |
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The real question is whether the falloff of the torque is still less than the rise of the speed. If so, then the horsepower is increased and the delayed shift is beneficial. You do know the relationships between horsepower and torque.......don't 'ya?? |
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#56
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Let's settle this debate with a dyno run Brandon
__________________
1985 CA 300D Turbo , 213K mi |
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#58
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Dyno runs are not cheap...and I don't know anyone nearby with a stock w126 300SD for comparison. Trying to find the dyno shop is the trick...there is a guy next door to a metal fab guy doing some work for a friend...he has a dyno in his shop so I am going to talk to him next time I am there. Remember...I haven't spent much money on my car and I cannot afford to do so |
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Besides, I've read many books on engine theory, design, and repair. All old stuff but the basics never change. Irregardless you learn the relationship between torque and H.P in physics class..haha |
#60
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You can see my torque peaks at 2300rpm then goes downhill from there. HP and TQ start to drop off at 4400rpm and take a nosedive at 4600rpm. |
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