13-04-2012, 02:02 PM
The turbine side is absolutely essential on Diesels... As standard they were crap...
I'll completely agree though, people need to stop getting distracted by other modifications (which are usually the for the petrol ilk), just whack on a better turbocharger and get the mapping sorted... IMHO the stock turbocharger housings are too small, no point in trying to fit mahoosive turbines in them, you end up screwing the A/R so much, it becomes pointless, the housings are as important as the turbocharger itself. Look at a VNT turbo, effectively a variable housing, they make a MASSIVE difference.
Not to mention the problems that inevitably come with a small turbine - Hydro Lifters.
All a HDi needs is a big turbo, a GOOD intercooler setup, no pikey bodges and a clutch... Once you've exhausted that, then maybe a bigger pump and nozzles - but the mapping is essential.
Not my cup of tea might I add - I don't give a crap about a lumpy, rash, rattly idle, a bit of a dead spot at about 1800rpm... Problem with a HDi, if you've got that going on, you've got all sorts of other issues that are being affected by that one thing... They're so intertwined...
I'll completely agree though, people need to stop getting distracted by other modifications (which are usually the for the petrol ilk), just whack on a better turbocharger and get the mapping sorted... IMHO the stock turbocharger housings are too small, no point in trying to fit mahoosive turbines in them, you end up screwing the A/R so much, it becomes pointless, the housings are as important as the turbocharger itself. Look at a VNT turbo, effectively a variable housing, they make a MASSIVE difference.
Not to mention the problems that inevitably come with a small turbine - Hydro Lifters.
All a HDi needs is a big turbo, a GOOD intercooler setup, no pikey bodges and a clutch... Once you've exhausted that, then maybe a bigger pump and nozzles - but the mapping is essential.
Not my cup of tea might I add - I don't give a crap about a lumpy, rash, rattly idle, a bit of a dead spot at about 1800rpm... Problem with a HDi, if you've got that going on, you've got all sorts of other issues that are being affected by that one thing... They're so intertwined...
