Avinitlarge Posted July 13, 2014 Report Share Posted July 13, 2014 This is my 20t, I ordered it with a 7cm2 Link to comment Share on other sites More sharing options...
Brad850 Posted July 13, 2014 Author Report Share Posted July 13, 2014 No matter how hard I push down on the arm, there is play in the circular stopper. I barely have to push on the 19t's arm and the circle feels like it's welded shut. I'm assuming if air was leaking through that would be really bad Maybe when the turbo heats up it becomes irrelevant? Could be one of those things where my simple logic doesn't apply. Do you really feel like the looser wastegate can cause any issues? Link to comment Share on other sites More sharing options...
Simply Volvo Posted July 14, 2014 Report Share Posted July 14, 2014 Do you really feel like the looser wastegate can cause any issues? Yes boost fade in the higher RPM's which the td04s already struggle with enough (although I could get power to 6K). I used a carbide cutting bit on a dremel. Before After Link to comment Share on other sites More sharing options...
Brad850 Posted July 14, 2014 Author Report Share Posted July 14, 2014 I'm more worried about how much material is safe to remove. Link to comment Share on other sites More sharing options...
volvoguy23 Posted July 14, 2014 Report Share Posted July 14, 2014 I just went and looked at an extra housing i have...should be fine removing .100" all the way around. Link to comment Share on other sites More sharing options...
flaco Posted July 14, 2014 Report Share Posted July 14, 2014 Post the numbers stamped on the side. 6's have a 6, 7's have a 7. Never heard of the round/square tab nonsense. Link to comment Share on other sites More sharing options...
Brad850 Posted July 14, 2014 Author Report Share Posted July 14, 2014 19t: 89-13300 6 DCH ... other side says 7D2... no numbers on either side of the inlet flange 18t: 189-13202 7 ... other side says HA32 ....0216 on one side of the inlet flange and 760 on the other side Link to comment Share on other sites More sharing options...
jschaefer7406 Posted July 14, 2014 Report Share Posted July 14, 2014 Hello all, Actual inlet size is irrelevant. My S70 came with a 6cm but had the huge inlet as shown on the left in your pics. Where it narrows to flow over the turbine wheel is where the difference lies. 7cm has an angled corner, 6cm is more square overall. I have seen both 6cm and 7cm housings each with the large and small inlets. Think maybe the early units had the smaller inlet? As for the tabs, my experience is that the 6cm housings have the square tabs. When I was looking for the 7cm 16T that I'm running now, I noticed that all of the 7cm housings had the rounded tabs, and all square tab units ended up being 6cm. So there is seemingly something to that, but consensus has it backward . Hope this helps, Joe Link to comment Share on other sites More sharing options...
TIZIO AKA 1 HND MEC Posted July 14, 2014 Report Share Posted July 14, 2014 I sold 3 angled housing with the square tabs, they were ALL 7 cm. Link to comment Share on other sites More sharing options...
floggingmike Posted July 14, 2014 Report Share Posted July 14, 2014 I guess i could check mine....anyway to do so with it on the car? Link to comment Share on other sites More sharing options...
jschaefer7406 Posted July 14, 2014 Report Share Posted July 14, 2014 I sold 3 angled housing with the square tabs, they were ALL 7 cm. Based off of the overall inlet size? Again, no offense, but most people here don't actually know what they're looking for... Joe Link to comment Share on other sites More sharing options...
mattwebb502 Posted July 14, 2014 Report Share Posted July 14, 2014 19t: 89-13300 6 DCH ... other side says 7D2... no numbers on either side of the inlet flange 18t: 189-13202 7 ... other side says HA32 ....0216 on one side of the inlet flange and 760 on the other side based on the pretty extensive digging I did several months ago, the markings you posted on the housing fitted to your 18t are the easiest and sure bet identifiers of 7cm... that housing (the "760" as I came to call it) is the "gold standard" in my book. IT IS A 7cm. All others are a bit of an unknown. Round tab vs square tab, 7 in the numbers vs 6 --- not necessarily indicators of what you have. Again, all based on my extensive digging but otherwise total lack of direct experience. I had a detailed spreadsheet at one point of all of the various Volvo numbers, MHI numbers, etc. Hours and hours of searching out and compiling data. Now it seems all I have is a whittled down version with mainly 13t housings, as I became CONVINCED at some point that SOME 13t turbos came with the 7cm --- and they are plentiful and cheap (hence the reason I chopped the list down to 13t only) I can send it to you if you want it, but now that I am reading here that round vs oval is not necessarily an indicator my chart may be misleading --- I built it based around ebay auctions with visible shots of the opening and various part numbers, with further supporting evidence coming from various manufacturer websites, etc. The primary underlying factor behind my hunting was the fact that I was advised by a reputable and well known tuner that oval vs round is a dead reliable indicator of 7 vs 6. Now I am really intrigued. I MAY be running a 6cm used housing instead of the brand new 7cm "760" that came on my Volvo 19t (I planned to sell it in new condition in order to recover some costs) I went so far as to take the housings, remove the clocking pins, and seal off the v band side with plastic wrap and a rubber band... I sealed the manifold flange with clay and clamped on wood, and I filled each with water (and contorted in strange ways to bleed all air without spilling liquid), topped up, dumped out the contents (again contorting to get all liquid out) and did final measurements. The "760" and the 13t variant with round opening measured up the same. Best method I could come up with without getting too crazy. one final edit: as I recall, I filled them to the point where the wastegate port (wg full open) and turbine hole were covered in liquid. I used a turkey baster to get any excess out. haha. The point is, the post turbine housing volume was taken out of the equation. I took notes, but I can't find them.... edit: here's the (whittled down) chart I was speaking of: Link to comment Share on other sites More sharing options...
Brad850 Posted July 15, 2014 Author Report Share Posted July 15, 2014 Thats really interesting Matt. I wish we could confirm my 19t is also 7cm. Thanks all for the input. Link to comment Share on other sites More sharing options...
jschaefer7406 Posted July 15, 2014 Report Share Posted July 15, 2014 I wish we could confirm my 19t is also 7cm. Your 19T housing definitely appears to be a 6cm version. Again, not because of the opening size, but because of the shape of the "choke" area over the turbine: Hope this helps, Joe Link to comment Share on other sites More sharing options...
flaco Posted July 16, 2014 Report Share Posted July 16, 2014 This is what you're after: 19t: 89-13300 6 DCH ... other side says 7D2... no numbers on either side of the inlet flange 18t: 189-13202 7 ... other side says HA32 ....0216 on one side of the inlet flange and 760 on the other side The 'other side' numbers don't matter. I also spent lots of time a few years ago researching turbine housings. There's even a mythical 8cm one going by the books; never seen one so it's bogus AFAIK. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.