Ultimate Street Sleeper - Mercedes W124 'Superturbodiesel'
Discussion
I like the concept, and have nothing against big power diesels, but that cloud of soot is just obnoxious, and shows a total "f
k you" attitude to other road users, let alone cyclists and pedestrians.
If you plant the boot in front of a motorcyclist or convertible and cover them in soot, don't be surprised if you get a bad reaction.
Why is it "tuned" that way anyway? It is just throwing fuel out the exhaust to no purpose.
k you" attitude to other road users, let alone cyclists and pedestrians.If you plant the boot in front of a motorcyclist or convertible and cover them in soot, don't be surprised if you get a bad reaction.
Why is it "tuned" that way anyway? It is just throwing fuel out the exhaust to no purpose.
NinjaPower said:
Several things from me:
I love the OP's car
I like the black smoke from heavily tuned diesels. The Americans like it too and call it 'rolling coal'. No smoke, No poke!
If you like tuned diesel noise, this is a nice video of a very rapid 400bhp Skoda TDi hillclimb car with a lovely vertical exhaust stack out the bonnet making some serious progress and serious smoke: http://youtu.be/r8IwgpdvqWc
As for big power figures from tuned diesel motors, the Americans love tuning their diesel pickup trucks to well over 1000bhp and run 9 second quarter miles in them, so I'm not sure why there is so much skepticism about big power tuned diesels?
The two biggest selling diesel pick ups in America are the Dodge Ram with a 6.7 litre Cummins straight 6 and the Ford F series with their own Duramax 6.7 V8.I love the OP's car
I like the black smoke from heavily tuned diesels. The Americans like it too and call it 'rolling coal'. No smoke, No poke!
If you like tuned diesel noise, this is a nice video of a very rapid 400bhp Skoda TDi hillclimb car with a lovely vertical exhaust stack out the bonnet making some serious progress and serious smoke: http://youtu.be/r8IwgpdvqWc
As for big power figures from tuned diesel motors, the Americans love tuning their diesel pickup trucks to well over 1000bhp and run 9 second quarter miles in them, so I'm not sure why there is so much skepticism about big power tuned diesels?
A 1000bhp from a 6.7 litre engine is relatively easy, it's 150bhp per litre, not the ~220b the OP is claiming, and the duty factor in a pick up is going to be something 10-15%, not the 50% plus like some industrial applications.
AW111 said:
I like the concept, and have nothing against big power diesels, but that cloud of soot is just obnoxious, and shows a total "fk you" attitude to other road users, let alone cyclists and pedestrians.
If you plant the boot in front of a motorcyclist or convertible and cover them in soot, don't be surprised if you get a bad reaction.
Why is it "tuned" that way anyway? It is just throwing fuel out the exhaust to no purpose.
That is what happens when you burn large quantities of heavy oil without any systems to mitigate the emissions like a DPF, also the fuel metering is done via a mechanical pump which doesnt have the same fine control as later systems so it just dumps fuel and air in and generates a lot of power, but also a lot of smoke, it isnt for no purpose, the fuel is used but it produces all sorts of nasty stuff as part of the process.k you" attitude to other road users, let alone cyclists and pedestrians.If you plant the boot in front of a motorcyclist or convertible and cover them in soot, don't be surprised if you get a bad reaction.
Why is it "tuned" that way anyway? It is just throwing fuel out the exhaust to no purpose.
Even petrols when under heavy load will generate smoke but diesels take it to a whole other level, "Rollin Coal" they call it.
J4CKO said:
That is what happens when you burn large quantities of heavy oil without any systems to mitigate the emissions like a DPF, also the fuel metering is done via a mechanical pump which doesnt have the same fine control as later systems so it just dumps fuel and air in and generates a lot of power, but also a lot of smoke, it isnt for no purpose, the fuel is used but it produces all sorts of nasty stuff as part of the process.
Even petrols when under heavy load will generate smoke but diesels take it to a whole other level, "Rollin Coal" they call it.
But it still is to no purpose. The LMP diesels don't run a DPF, and don't blow soot, and a properly mapped petrol doesn't smoke under heavy load either.Even petrols when under heavy load will generate smoke but diesels take it to a whole other level, "Rollin Coal" they call it.
I know it's a mechanical pump, but running that rich isn't a side effect of lack of fine control in the injection. The only reason I can think of is that it's a really crude system which injects more fuel based on engine RPM, so if you get the mixture right at 2,000 it injects 3 times as much fuel at 6,000, regardless of VE and burn rates.
This is not (only) me bashing the OP - if you could get the power, or most of it, without the soot this would be a cracking car.
So - can that be done?
ps the "rollin coal" thing is as much a scene as mega camber and stretched rims, given that people in the "coal" scene take pride in how much smoke they make
You need an element of smoke when mapping a diesel. It's always better to inject a tad more fuel than you specifically need.
However thick black clouds of smoke aren't ideal. Mine doesn't really kick any smoke out at all unless I've been pootling around for a few hours and then plant it in 2nd.
However thick black clouds of smoke aren't ideal. Mine doesn't really kick any smoke out at all unless I've been pootling around for a few hours and then plant it in 2nd.
xjay1337 said:
You need an element of smoke when mapping a diesel. It's always better to inject a tad more fuel than you specifically need.
However thick black clouds of smoke aren't ideal. Mine doesn't really kick any smoke out at all unless I've been pootling around for a few hours and then plant it in 2nd.
As the driver you are not going to see the smaller plumes. However thick black clouds of smoke aren't ideal. Mine doesn't really kick any smoke out at all unless I've been pootling around for a few hours and then plant it in 2nd.
xjay1337 said:
You need an element of smoke when mapping a diesel. It's always better to inject a tad more fuel than you specifically need.
Please can you explain why? Surely the right amount is the right amount, more is too much or is that too simplistic? I know there are reasons Audi (and the ACO) wouldn't want to have smoke from their LMP1 cars but they seem to be pretty quick without any, and according to reports operate efficiently in producing the power they do.AW111 said:
But it still is to no purpose. The LMP diesels don't run a DPF, and don't blow soot, and a properly mapped petrol doesn't smoke under heavy load either.
I know it's a mechanical pump, but running that rich isn't a side effect of lack of fine control in the injection. The only reason I can think of is that it's a really crude system which injects more fuel based on engine RPM, so if you get the mixture right at 2,000 it injects 3 times as much fuel at 6,000, regardless of VE and burn rates.
This is not (only) me bashing the OP - if you could get the power, or most of it, without the soot this would be a cracking car.
So - can that be done?
ps the "rollin coal" thing is as much a scene as mega camber and stretched rims, given that people in the "coal" scene take pride in how much smoke they make
The mech diesel pump injects based revs, throttle position and boost.I know it's a mechanical pump, but running that rich isn't a side effect of lack of fine control in the injection. The only reason I can think of is that it's a really crude system which injects more fuel based on engine RPM, so if you get the mixture right at 2,000 it injects 3 times as much fuel at 6,000, regardless of VE and burn rates.
This is not (only) me bashing the OP - if you could get the power, or most of it, without the soot this would be a cracking car.
So - can that be done?
ps the "rollin coal" thing is as much a scene as mega camber and stretched rims, given that people in the "coal" scene take pride in how much smoke they make
Diesel LMPs do run DPFs.
Also bear in mind they are not tuned for out and out power.
Time for a major update!
The car shot a rod. A combination of the power and revs. Fortunately engines are cheaper than trying to replace parts so it has a fresh engine, a new rev limit of 5,800 rpm and less fuel / boost. This is a nice set up for now and I think it will stay that way for a while. Only thing it may need is a new manifold for the turbo to spool earlier.
Made a new vid of the set up. It is still fairly quick!
https://www.youtube.com/watch?v=976QouSnkWs
The car shot a rod. A combination of the power and revs. Fortunately engines are cheaper than trying to replace parts so it has a fresh engine, a new rev limit of 5,800 rpm and less fuel / boost. This is a nice set up for now and I think it will stay that way for a while. Only thing it may need is a new manifold for the turbo to spool earlier.
Made a new vid of the set up. It is still fairly quick!
https://www.youtube.com/watch?v=976QouSnkWs
Had the car on a dyno!
On this safe setup of low revs, and low boost / fuel it still made 362bhp / 378ft lb! 305whp.
I think she will stay at this power until i sort the brakes / suspension.
https://m.youtube.com/watch?v=9GgZNluEsgM
On this safe setup of low revs, and low boost / fuel it still made 362bhp / 378ft lb! 305whp.
I think she will stay at this power until i sort the brakes / suspension.
https://m.youtube.com/watch?v=9GgZNluEsgM
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