I would just like to hear other's thoughts on steel exhuast turbine housings. Hopefully next year I will get around to turboing the cav. I have really liked the idea of instead of using a Holset HY-35 (a major part of it being as they are hard to find new or rebuilt), using an H1C with
this trubine housing.
The problem is: to my understanding, most turbine housings are made of some form of iron (whether it be Ni-resist or Ductile). How strong would a high carbon content steel casted housing be in comparison to an iron housing? Which could disipate heat faster?
I'm just trying to gather your thoughts on the idea before I start throwing money around. Thanks.
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"Youth in Asia"...I don't see anything wrong with that.
The steel units I've seen have been very impressive, very strong, very precise. I think cast iron would dissipate better, but I don't see why you would want that (think of all those people adding turbine blankets and shields).
fortune cookie say: better a delay than a disaster
I thought the heat shields were just used to keep underhood temps down. My logic was that cooler exhaust temps would provide less stress on the wheel & housing as well as allow more of the exhaust gases to escape faster due to the denser air in the exhaust manifold (even though the air might be less pressurized). Good to hear that I could probably trust a steel housing though.
On a side note, Notec, you seem to be knowledgable on DSM's. The turbine housing I posted uses the stock DSM 4 bolt downpipe/dump-section (whatever the heck you call it). Where would be a good place to find those. I would probably hit up the junkyard first, but I would like to have a backup plan if I can't find any. You wouldn't happen to know the exit diameter on those either, would you?
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"Youth in Asia"...I don't see anything wrong with that.
Brian Whalen wrote:I thought the heat shields were just used to keep underhood temps down. My logic was that cooler exhaust temps would provide less stress on the wheel & housing as well as allow more of the exhaust gases to escape faster due to the denser air in the exhaust manifold (even though the air might be less pressurized). Good to hear that I could probably trust a steel housing though.
On a side note, Notec, you seem to be knowledgable on DSM's. The turbine housing I posted uses the stock DSM 4 bolt downpipe/dump-section (whatever the heck you call it). Where would be a good place to find those. I would probably hit up the junkyard first, but I would like to have a backup plan if I can't find any. You wouldn't happen to know the exit diameter on those either, would you?
As you said, the hotter air is more pressurized, so it travels faster (moving a greater volume of air per cycle). This will create more work on the compressor wheel. As far as the increased stresses, the biggest problem from the increased heat is usually with the turbine housing cracking, but with the steel housing you won't have to worry about that.
DSM guys call that piece the O2 housing, and you can find them from most DSM vendors, I'm partial to
Extreme PSI, but you can find many more
here.
Also, check
DSM Trader and ebay for used pieces. Most O2 housings exit to the downpipe at 2.5", but I have no idea what that turbine housing discharge diameter is where the O2 housing bolts up. Remember, DSMs have a lot more room for the O2 housing, so the chances of it fitting behind an LD9 is not great.
fortune cookie say: better a delay than a disaster
OHV notec wrote:As you said, the hotter air is more pressurized, so it travels faster (moving a greater volume of air per cycle). This will create more work on the compressor wheel. As far as the increased stresses, the biggest problem from the increased heat is usually with the turbine housing cracking, but with the steel housing you won't have to worry about that.
Hotter exhaust gases would have a greater "volume" passing through, but the mass should be the same as the cooler gases...but I guess it is the speed that the air exits that matters, as it is what ultimately spools the turbo. Regardless, you answered my question more than well enough.
OHV notec wrote:. Remember, DSMs have a lot more room for the O2 housing, so the chances of it fitting behind an LD9 is not great.
Due to the unfortunate auto trans, I have plans for either fabricating or having a shop fabricate a custom top mount ramhorn or unequal length header. I have two ideas for how the turbo will rest on the manifold. I just don't have a basis for how large the turbo is so my ideas are just speculation/guesses for right now.
One idea is for the turbo to sit sideways so that the vaccum side of the compressor would face forward, and I would make the necessary modifications to the hood so that it would both clear and provide as a functional "ram-air." The other would be a more traditional LD9 top mount with the compressor side facing forward, where the charge pipes would either pass over the cam towers or bend back around the engine and over the top engine mount. I prefer the first idea, but I'm leary because I kind of like the sleeper look (especially driving "just a cavalier"), the O2 housing most likely wouldn't fit without massaging the firewall, and the custom ram air idea might be a bad idea for a daily driver in a state that gets plenty of snow.
Thanks for all of your help notec. Those links are exactly what I was looking for.
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"Youth in Asia"...I don't see anything wrong with that.
Tial has been making steel turbine housings for a while, not only are they sweet looking, they also off a huge weight reduction over the cast iron housings.
GT42 with TiAL cast stainless steel V-Band turbine housing, a 16 lb reduction in turbo weight!!!
GT30 with Cast stainless housing...10 lb reduction!!!
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
Is it bad that i got a hard on looking at those pix
I need to get me a Tial turbine housing.....
I could have used this info sooner.......
Quote:
Note From TiAL:
Due to extreme high demand, we may not always have these housings in stock. when you place your order prepare for a two or three week wait unless we notify you at time of purchase.
Guess I wont be getting it before the bash
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
