Quote:
|
Originally Posted by 300EVIL
Hi leighton,.............................
Actually it's not a stupid question. Your reasoning makes sense, since their both Mercedes engines and they both have equal displacement, the diesel turbo should work on the gas engine. In fact it would work,, however, not very well. You see, a diesel engine does not move as much air as a gasoline engine due to it's lower RPM range and high compression ratio...........
Good Luck!
Adam
|
Unless the laws of physics have changed since I was last awake...this above statement is incorrect.
You would imagine, that due to the performance of a 3000cc diesel against a 3000cc gas engine, this was so.
In fact, a naturally aspirated diesel or gas motor of the same displacement will use the same amount of air......but.....because a gas engine is throttled, it will, in any performance range where the throttle is impeading the total power of the engine, the gas engine will use/consume less air.
It is true however, that the exhaust energy of a diesel is less than a gas engine of the same size.
Most passenger car diesel engines run 1000 rpm to 5000 rpm the same as most gas engines.
Larger 5.9... 6.2...6.5.. and up engines use 3000 rpm as an upper limit due to inertial loads inside the engine, typically the piston assembly.
This is more so in big rig engines that rev only to 1900 rpm.
My 17.5 ltr IVECO twin turbo V8 that I drove in 1985 to 1988 ran all the way up to 2600 rpm ...(I visited with an IVECO tech' in Italy who told me the off shore motors in the IVECO race boats only used different pumps and turbo's..the rest of the engine is factory stock and rev to 3000 rpm for 24 hours straight)......before I 'adjusted' the limiter/fuel stop on the pump.
This 48 tonne rated truck pulled 1150 rpm at 70mph....a theretical top speed of about 160 mph .
Anyways.....