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15:09:22 - 04/23/2024
Dakota Performance
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shatto
Dodge Dakota
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5/18/2006
01:26:32
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 Subject: RE: Turbo Diesel
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Then you could put on a Gear Vendor unit and really smoke!
jd,
When I tried to stop the Land Rover by putting my foot over the exhaust, it eventually blew my foot away in a huge cloud of black smoke!
We happened to be in the garage of the dealer. All the mechanics went into hysterics at seeing me in "Black Face." All over. Thankfully, they had air and cleaned me up.
Huggins,
Your short description of the twin turbo is better than www.howthingswork.com.
I would appreciate you expanding on how they work.
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Huggins
Dodge Dakota
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5/18/2006
13:04:16
| RE: Turbo Diesel
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Not a problem shatto... To start with the twin turbo setup on the Ford's coming out engine isn't a true twin turbo setup... A true twin turbo setup is one where both turbo's "one on each side or each engine bank" are the same size and displacement... Fords twin turbo setup is one where a smaller turbo is feeding a larger turbo, which results in great off-idle response "no turbo lag", plus it still allows for high boost pressures on up in the rpm's, where as the smaller turbo would almost hit a stall-out point or a point where it would no longer be able to make boost... Ford is doing this to replace their Electronic Variable Response Turbo "original name", or their Variable Geometry Turbo "name that it goes by now"... The VGT actually had the capability of changing the size displacement internally to the turbo by rotating the vane pattern that was feeding exhaust into the turbine of the turbo... In other words it would have full boost at low rpm's all the way to the max rpm band at 4500 rpm's...
A turbo contrarily to most beleif actually works off of expanding exhaust gases or simply put expanding heat which spools up the turbine, which is then connected to a compressor wheel via a turbine shaft... The turbine is always connected to the compressor... The compressor is what actually creates the boost on the intake side of the engine... Diesels don't neccessarily require it due to the fact that they don't have a throttle plate but on gas engines where you close the throttle and all of the boost builds up you need or rely on a blow off valve "inbetween the turbo and tb" to releive excess pressure build up or you will bend or blow apart the throttle plates or worse and blow apart the turbo... Also due to the fact that turbo's rely on exhaust gasses moving through some small ports into the turbo, you will develop a large amount of backpressure in the exhaust manifolds, this is where the wastegate comes into to effect to bypass the turbo and dump exhaust straight into the down-pipe of the exhaust system... Exhaust gasses can only expand and move so fast through the turbine housing... The wastegate in a diesel works off of pressure that is built up in the intake manifold, because diesels do not build vacuum... They don't build vacuum becuase there is no throttle plate to create a restriction in the intake system... Wide Open Throttle all of the time... The ford 6.0's had throttle plates that were removed so as when the egr system on those engines was activated it would close the throttle plates somewhat to creat a low pressure in the intake manifold, but like I said they had a lot of problems with it and removed it from the engine by putting an exhaust scoop in the exhaust pipe that would force the egr to flow all of the time... I just through that in there incase anyone out there owned a ford 6.0 and claimed that their diesel had a throttle body...
I hope this was a little bit helpfull...
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shatto
Dodge Dakota
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5/18/2006
20:26:28
| RE: Turbo Diesel
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Thank you, Huggins,
I'm reminded of the History Channel story on the development of the jet engine. Lots of Persuit planes had turbochargers, some Radials like the P-47 had two stage superchargers, but being a radial I'd guess it was mechanical.
So, everybody tacked on turbo's for performance, and nobody noticed how close they were to having a jet tacked on a piston engine.
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Huggins
Dodge Dakota
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5/19/2006
14:55:12
|  RE: Turbo Diesel
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Not a problem... Just glad I didn't confuse you... I read back over it and almost confused myself at places:))
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Super bee
GenI
5/23/2006
08:54:15
| RE: Turbo Diesel
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sometimes i wish my cummins had a blowoff valve type setup
its hard to stop it right after the turbo spools up when you floor it
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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Huggins
Dodge Dakota
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5/23/2006
23:03:31
| RE: Turbo Diesel
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I read a little further into the specs of the new cummins... I'm glad to say that it will have the variable geometry turbo on it, other than that with the new egr setup and so forth, I just don't know how it will play out... Oh and they are posting extremely detuned specs of 305hp and 610 torque, "I beleive if I'm not mistaken"... I was thinking about getting one, but with that low of specs and the fact that everything is pretty much new, I just don't know... I guess we'll just have to wait and see how things play out...
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Super bee
GenI
6/03/2006
15:05:26
| RE: Turbo Diesel
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you know its not going to stay there with chevy out with the 650
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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toolfan
GenIII
6/03/2006
21:14:21
|  RE: Turbo Diesel
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are they going to keep the 5.9L? and i heard the 6.7 was going to have 700+tq. DON'T BUY A FORD 6.0L diesel!
Huggins i thought that they always used different size turbos on twin turbo systems? i dont see the point in have two of the same size turbos unless you need or want a back up.
now all they need to do is put smaller diesel in the dakota and jeeps. i would take a dakota with a 5.2L 6 inline diesel. :-D
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Super bee
GenI
6/05/2006
16:45:51
| RE: Turbo Diesel
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they have a CRD in the liberties already
and the 5.9 will be dropped for the 6.7 and right now is offered in the industrial trucks, frame trucks ect.
it is put at 305 hp 610 tq or something liek that for now
GM has the 650 duramax out so it wont be long until they hop it up to like 700 tq
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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Huggins
Dodge Dakota
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6/05/2006
23:40:52
| RE: Turbo Diesel
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Twin turbo's are as the name kinda infers, two identical turbos, but as you put it the most benefit of this setup is to have a smaller feeding a bigger... They went to using the two single same size turbos to help elliminate backpressure, to help the exhaust pulses and they also found this setup to develop more boost than the single big turbo... As stated or inferred by yourself, the 6.0's are junk, infact they changed a few of the designs a 1/4 of the way through the first production year of the engine and that was then followed by many more changes... The stupid thing is, is that they allready knew that these changes needed to be implemented because they had to do all of the exact same changes to the 7.3l through it's production years... The characteristics that the 6.0 had that I personally liked and only wished that some of the other diesels had as well, is the vr turbo and the 4500 rpm redline...
The epa or government won't allow diesels to be widely available in everything in the us due to their NOX emmissions, but as toolfan stated, I too would love to have just a 4 cylinder turbo diesel in a dakota to knock around in... Doesn't have to be anything too overly huge such as a 6 cylinder, just a turbo 4 cylinder... Heck all of that torque and the possible 50 mpg "which is what the old nissan diesels got" would be very very nice...
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cubanmech
GenIII
6/08/2006
10:17:54
| RE: Turbo Diesel
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hi i'm erick and i was reading a couple of the posts on this forum and i was wondering if anyone has actually tried to do a diesel swap with the dakota and if so what kind of problems did you run into
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Super bee
GenI
6/08/2006
17:31:55
| RE: Turbo Diesel
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update
i jsut filled up my 3500 and i got 19.5 mpg
w007
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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