go for the merc. unit for WF if you need too. Its not bad, turbine side and trim is larger than the stock T3's... though, the compressor still holds at .42Uses standard T3 flange and a standard 4 bolt discharge, just like the stock IDI TD units. Joe
Quote from: "RabbitGTDguy"go for the merc. unit for WF if you need too. Its not bad, turbine side and trim is larger than the stock T3's... though, the compressor still holds at .42Uses standard T3 flange and a standard 4 bolt discharge, just like the stock IDI TD units. JoeWait.. the MB turbo has the same trapezoidal flange that the VW T3's do? What years/cars did the MB turbo come from? Maybe I'll try and find one of those instead of using this T-3.Brendan
4" downpipe :shock: thats way overkill, I know of 2 turbo VR6's make well over 600whp with a 3" dp...............
We'll I've got the hx30 spooling as a single and I'm pretty sure I've got a major issue as It will only make 28-29 psi with 40 psi driving it and wastegate held closed.No boost leaks upto the head but I suspect that the headgasket may be the cause of the low boost? :?
Yes...yes... that .48 A/R compressor housing on that particular MB turbo is very interesting...we could benefit Smile Did that come off a 300D? Its def. not off a mid 80's 300, as they have a different wastegate setup...I like the external setup on that one.Sprinter maybe? Very interesting! Whats the hot side A/R on that unit? all the merc 300D turbos I have seen were .42cold and .48 hot. Ideally I don't think we benefit above .48 on the hot side for the TDI (its nice for "breath" through the higher RPM's on the TDI compared to the early turbos), but the .48, .50 compressor could generate some additional benefits...which is why that turbo is so interested! More info~
Quote4" downpipe :shock: thats way overkill, I know of 2 turbo VR6's make well over 600whp with a 3" dp...............And if they bolted on a 4" downpipe they'd likely gain 20WHP, lower egts by at least 100 degrees, turbo would spool sooner, oil temps would drop, you get the idea.Just because people make power a certain way certainly does not mean its a good way of doing it.
No...they have the standard 4 bolt rectangular inlet flange (t3 flange) but DO use the same discharge flange as the older IDI TD turbos do...as mentioned and shown below...Guess I needed to clarify that... the "trapezoid" flange is def. not standard and is unique to VW from what I have ever seen. Joe
QuoteYes...yes... that .48 A/R compressor housing on that particular MB turbo is very interesting...we could benefit Smile Did that come off a 300D? Its def. not off a mid 80's 300, as they have a different wastegate setup...I like the external setup on that one.Sprinter maybe? Very interesting! Whats the hot side A/R on that unit? all the merc 300D turbos I have seen were .42cold and .48 hot. Ideally I don't think we benefit above .48 on the hot side for the TDI (its nice for "breath" through the higher RPM's on the TDI compared to the early turbos), but the .48, .50 compressor could generate some additional benefits...which is why that turbo is so interested! More info~ here you can see some more photos of this turbo:http://www.zaprzal.info/t3merc/I think it's a 250turbo mercedes and this same impellers were on MB sprinterwhat do you think about some crazy hybrid: 0,48 exhaust housing and saab (gasoline) compressor impeller and housing?
Actually if you search the forced induction forum on the tex you'll find that peeps have already tested that, I believe it was done on a turbo R32 and they found no power gains from going 3" to 4"......My point was that on a wee little 1.9 TDI that'll maybe rev to 5000rpm will never flow enough exhaust to take advantage of a 4" DP, I'm not making this up, if you plug the #'s in you'll see what I mean, I'm simply arguing the science of it.Hilfolk why don't you try running a GT22???