02-07-2013, 09:00 PM
I bet 300TDi nozzles set up properly in the injectors would be a good choice tbf, it's just that the fuel is so uncontrollable on the mechanical setups that you can end up with chronic coal-age...
The thing with even the SDi and I'd even go to say the 300TDi nozzles is that even past 3500rpm or so, you've got such a short time period to get the fuel in, you will struggle with "small" nozzles... DI engines suffer so badly from this, which is why you see so many engines making ALL their power at around 3-3.5k because if you try and get the fuel in past there, the peak temperature and pressure has gone by the time you've finished injecting...
With "big" nozzles you may want to up the break pressure a little (note this will add to injection retard, so map will need to be adjusted to compensate) to get great atomization... With the correct tuning, you CAN make big nozzles work well, it's usually poor tuning that causes smoke and gutless-ness issues etc...
The thing with even the SDi and I'd even go to say the 300TDi nozzles is that even past 3500rpm or so, you've got such a short time period to get the fuel in, you will struggle with "small" nozzles... DI engines suffer so badly from this, which is why you see so many engines making ALL their power at around 3-3.5k because if you try and get the fuel in past there, the peak temperature and pressure has gone by the time you've finished injecting...
With "big" nozzles you may want to up the break pressure a little (note this will add to injection retard, so map will need to be adjusted to compensate) to get great atomization... With the correct tuning, you CAN make big nozzles work well, it's usually poor tuning that causes smoke and gutless-ness issues etc...
