So we were sitting around at work today chatting about cars like we normally do and the topic came around to diesel engines. One guy said that turbo's are the only way to go with diesels. Another guy said Superchargers were just as good if not better for diesels. I've never seen a diesel with a supercharger on it but then again I'm not big into the diesel side of things.
i agree with blk94 a super charger uses hp to make hp turbos use the exaust to make hp, turbo's are better, but then again superchargers have no lag so a super charger would give you better throttle responnse. but powergains/economy turbo is the only way to go
alot of the older semi's used super chargers. If I remember right the early drag racers took the 6-71 super chargers off of diesels and modified them to work on the hemis.
alot of the older semi's used super chargers. If I remember right the early drag racers took the 6-71 super chargers off of diesels and modified them to work on the hemis.
Those superchargers were on Detroit Diesel 2 stroke engines, they would'nt run without them as there was no intake stroke to draw in a sufficient amount of air. The 6-71 designation was actually the identifier of the engine the blower came off of, the 6 stood for six cylinder and the 71 for seventy one cubic inches per cylinder.
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Powerstroking Seven T444Es, one VT365 and one 6.0. Also four DT466s, one DT360 and a Mercedes MBE906.
I'm doing my part to reduce food imports, control rising food costs and help feed the children, my trucks run on 100% petroleum diesel. What are you doing?
Yeah, them detroits didn't have super chargers, they called them "induction blowers", and they were actually considered naturally aspirated.
Yep, and some of them had turbochargers on them also to feed the "Induction blowers".
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Powerstroking Seven T444Es, one VT365 and one 6.0. Also four DT466s, one DT360 and a Mercedes MBE906.
I'm doing my part to reduce food imports, control rising food costs and help feed the children, my trucks run on 100% petroleum diesel. What are you doing?
I have seen a detroit diesel on a generator set that had twin turbo's and a supercharger on it. superchargers supply low end power for when you first get a load but require power from the engine to drive them. Turbos don't give much boost until you have already loaded the engine and are getting some exhaust gas volume, this is the source of turbo lag. turbo's are making use of the waste heat in the exhaust and don't rob any power from the engine to operate so they are the more energy friendly way to go and are also cheaper and weigh less then the superchargers.
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2000 F250 4 x 4 77,000 miles conventional cab longbed
six speed manual transmission.
AIS intake, 4" turbo back Magnaflow S/S exhaust
inlet & outlet pyrometers & boost gauge
The saying "It takes power to make power" is not true, for example turbos and NOS.
You are partially correct. Turbos do require power to operate, in the form of heat energy. They don't rob any power from the crankshaft is where the difference is.
You are partially correct. Turbos do require power to operate, in the form of heat energy. They don't rob any power from the crankshaft is where the difference is.
We could chase eachother around forever, but the way I would describe it is:
A supercharger is belt driven off of a crankshaft pully, it draws about 35-50% the extra torque or power it adds to its naturally aspirated cousin.
A turbocharger uses energy that would otherwise be wasted, using an exhaust turbine. There are no gears or lots of rotating mass to rob torque anywhere in a turbocharging system. That is why they say it gives you "free" power.
The problem with calling it free power is that in order to produce boost, you must create back pressure to drive the turbine. The loss of efficiency with a turbo is generally much smaller, generally being less than 10% loss due to the backpressure created, and less than 5% on some well engineered industrial turbocharged setups.
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1976 F-250 Camper Special - does not run
1977 F-150 Northland Edition - does not run
2002 F-350 Powerstroke
1996 Ranger 2wd 4cyl manual - daily driver
Diamond-T 5-ton truck - does not run (May recieve a DT466 in the future)
Because unless you have a two stroke and need it, it's more efficient to run one, or two, or three turbo's.
Now if you're going to be street racing you could use both, and it might be justafiable.
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1976 F-250 Camper Special - does not run
1977 F-150 Northland Edition - does not run
2002 F-350 Powerstroke
1996 Ranger 2wd 4cyl manual - daily driver
Diamond-T 5-ton truck - does not run (May recieve a DT466 in the future)
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