06-01-2013, 11:58 PM
Sorry, why can't we sack off the MAF and just go straight for MAP based past ~Stage 2 ish?
MAF sensors cause nothing but ballache, is it ACTUALLY working, half the time it's out of range, becuase HDis haven't got boost control, nor boost input, at WOT when the MAF sensor is out of range if the boost pressure isn't set exactly right, it'll smoke...
From MY experience of anything turbocharged, the response is massively improved the less piping on the air intake... Don't ask me why, but LENGTH of piping causes a massive difference... My XUD9 which had 2.25" piping from the compressor inlet all the way to out front, if I took OFF that piping, I could feel a noticable gain in top end power and a reduction in spool time... With it back on - less response/more lag... Let alone with a filter, I tried one of those BMC CDA jobs, I even tried an airbox off a Volvo D5 and it felt down on power, but I'd be fairly convinced that's a combo of the filter and piping...
Only way to have inlet piping IMHO is to have a full blown 3" inlet pipe with a massive filter - not necessarily a cone/enclosed £ra*e one... Just grab an airbox off a ~250hp petrol car, and you won't go far wrong...
The fact that the Stock air inlet pipe on an XUD9 is so MASSIVELY restrictive makes me think that a HDi will probably be not far off, after seeing one... I'd be inclined to believe that..
MAF sensors cause nothing but ballache, is it ACTUALLY working, half the time it's out of range, becuase HDis haven't got boost control, nor boost input, at WOT when the MAF sensor is out of range if the boost pressure isn't set exactly right, it'll smoke...
From MY experience of anything turbocharged, the response is massively improved the less piping on the air intake... Don't ask me why, but LENGTH of piping causes a massive difference... My XUD9 which had 2.25" piping from the compressor inlet all the way to out front, if I took OFF that piping, I could feel a noticable gain in top end power and a reduction in spool time... With it back on - less response/more lag... Let alone with a filter, I tried one of those BMC CDA jobs, I even tried an airbox off a Volvo D5 and it felt down on power, but I'd be fairly convinced that's a combo of the filter and piping...
Only way to have inlet piping IMHO is to have a full blown 3" inlet pipe with a massive filter - not necessarily a cone/enclosed £ra*e one... Just grab an airbox off a ~250hp petrol car, and you won't go far wrong...
The fact that the Stock air inlet pipe on an XUD9 is so MASSIVELY restrictive makes me think that a HDi will probably be not far off, after seeing one... I'd be inclined to believe that..
