removing diesel particulate filters!!

[robo]

On the 1.3 does not pass a lot of difference between a kat and a straight tube as you increase displacement you still need more? back-pressure.
The problem of the straight-tube ? that smells a lot of exhaust while with kat 200, on the 1.3 I find it a bit to sweeten the smell of the exhaust.

[alxcrs]

To me it has never happened that in the review I raise the car to check for the presence of catalyst or dpf/fap...

[dvdtuning]

I also ask you first to the client, informing it on any revisions etc., in most cases, the hole inside the 40/50 and without problems.

[franco75]

is the exact problem ? in general, the straight tubes are good if you have the dpf and catalytic separated otherwise with the tube on some cars you lose the back pressure that was there before the removal, with a resulting vacuum you low..at this point you should where can you? take a cat from the demoman and apply it to the car, always when the situation makes it possible,and the expense is minimized

this vacuum to low ? been measured on the bench? according to me in a car the turbo there is no vacuum.. ? only a personal opinion by beginners

[alxcrs]

As far as I know, correct me if I'm wrong, the vacuum to low is not a simple theory, even in turbocharged engines...
In fact, while in the aspirates, and' due to the best power extraction in the combustion chamber by the exhaust system more****** (that enhances their extraction at high speeds, see also collectors, 4-in-1), in the case of turbo engines by decreasing the back pressure decreases even slightly, the performance of the turbine is very closely related to the temperature of the exhaust gas (for example, the performance is better in the climb with the engine under stress).
In fact, to overcome this drawback, in the competitions, especially, are insulated the exhaust manifolds, the nut exhaust and part of the tube immediately after the turbine in order to maintain the warm and consequently speed up the exhaust gas...

At this point, the spontaneous question is:
should I delete the dpf and then if I have a vacuum to low?

My first response is:
in the case of cars to delete the dpf or the precatalizzatore (in cars without dpf), it is always convenient in that it greatly lengthen the life of the turbine due to the decrease of the temperature of the work (not to mention all the problems related to particle filters, which finally disappear). But I prefer, however, to mount a metal catalyst, far away from the turbine (for example under the car) to keep a minimum of back pressure, but also a minimum of anti-pollution... (in the old wrc the catalyst was mounted in place of the silencer)

[franco75]

Are you considering the temperature and the pressure, increase the temperature of the gas is fine but not at the expense of an increase in pressure.
With a back pressure less I am convinced that the engine makes a better, we would take a test on a dynamometer

[alxcrs]

Hello franco, I would not like to be misunderstood, I do not say that the provision worst way striking....
To ****s performance (with machine fully ori) the real benefits of the pipe ****** you have them from the mid-range to climb where less backpressure ****** vent the fairy turbine...
At the bottom, the better reactivity of the turbine is offset the lower thermal efficiency...
At this point, if you interviena on the map with full knowledge of the cause, the performance advantage that is obtained becomes really interesting..!!

[franco75]

As agiresti in the map at low revs and with a little turbine?
Delaying the injection increases the temperature of the gas and the pressure at the discharge, according to you, benefit, or only worsens the performance?

[alxcrs]

With the turbine original I would try to solve by working on the variable geometry turbine plus instead I'd also review the time... In this case, however, I ask you to confirm you as the more experienced.