In a late night shopping fit, I ordered a revo air filter for the old girl. The filter could do with replacing (even though its been through a MAJOR service in a VW commercial workshop and a specialist in the past 12 months and looks like its never been changed….).
I’m a fan of foam, always used them on my cars over the years and they come as a standard fit item on higher spec models from factory we’ve bought, easy to clean and maintain too.
Anyhow, it was supposed to turn up yesterday but didn’t, and I’d already taken the lid off the airbox and binned the old dirty filter in prep, but needed to use the van last night to pick something up, and I wasn’t fishing the filter out of the wheelie bin full of crap and putting it back in! So I had a ramair cone filter 80mm ID from the audi (bought in error one drunken evening instead of the complete kit and kept as a spare).
So I wanged it on the end of the maf, and went to collect my wares.
All I can say is, my god the noise lol. Its like someone has a giant jet engine running, the intake suction noise and whooshing is insane at part throttle and beliw 2k rom, oddly at WOT and above 2.5k the intake noise goes silent. But, the van went like stink lol, previously it had a surge of torque up to about 2.5k then just made noise and felt wheezy, almost exactly like my TVR when that had a dirty filter and worn coils, now it revs freely and keeps pulling harder way up the rev range. I can only assume the old filter has had its day, I mean it looked dirty, but not crazy dirty.
Can’t wait for the panel filter to arrive though, because my god that intake noise will drive me bananas.
Anyhow, I am honestly not sure why just a filter could make so much difference, other than the other one is clogged up (again I have seen worse filters), are the TDI’s particularly fussy about filters?
Also, I’m genuinely surprised how well it pulls up the rev range for a 150. Is there a way with obd11 that I can see whether the previous dealer had mapped it? They do offer remaps as prt of sale, I didn’t ask for it, but the van doesn’t have a limiter etc like some AA vans do? It now has a surge of torque like it did before but continues to pull harder up to 4k rpm? #confused
Thanks.
I’m a fan of foam, always used them on my cars over the years and they come as a standard fit item on higher spec models from factory we’ve bought, easy to clean and maintain too.
Anyhow, it was supposed to turn up yesterday but didn’t, and I’d already taken the lid off the airbox and binned the old dirty filter in prep, but needed to use the van last night to pick something up, and I wasn’t fishing the filter out of the wheelie bin full of crap and putting it back in! So I had a ramair cone filter 80mm ID from the audi (bought in error one drunken evening instead of the complete kit and kept as a spare).
So I wanged it on the end of the maf, and went to collect my wares.
All I can say is, my god the noise lol. Its like someone has a giant jet engine running, the intake suction noise and whooshing is insane at part throttle and beliw 2k rom, oddly at WOT and above 2.5k the intake noise goes silent. But, the van went like stink lol, previously it had a surge of torque up to about 2.5k then just made noise and felt wheezy, almost exactly like my TVR when that had a dirty filter and worn coils, now it revs freely and keeps pulling harder way up the rev range. I can only assume the old filter has had its day, I mean it looked dirty, but not crazy dirty.
Can’t wait for the panel filter to arrive though, because my god that intake noise will drive me bananas.
Anyhow, I am honestly not sure why just a filter could make so much difference, other than the other one is clogged up (again I have seen worse filters), are the TDI’s particularly fussy about filters?
Also, I’m genuinely surprised how well it pulls up the rev range for a 150. Is there a way with obd11 that I can see whether the previous dealer had mapped it? They do offer remaps as prt of sale, I didn’t ask for it, but the van doesn’t have a limiter etc like some AA vans do? It now has a surge of torque like it did before but continues to pull harder up to 4k rpm? #confused
Thanks.
I recon having a good clear out in the loo before a journey would get better gains 
