Time to have my own Turbo Build Thread

yashart_mp3 said:
Hmm, looking at the pictures again, it looks like it has a 4 bolt discharge flange (what the downpipe connects too) on the turbo. If it is a 4 bolt, then it means that you have a T3 turbo inlet flange. Which could mean even better news for you, as T3 turbos are much cheaper than the dual ball bearing GT series turbo, like you currently have....

Take a look/ and or pic of where the downpipe connects to the turbo. Does it have 4 or 5 bolts?
Click to expand...
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Is this what you wanted?
 
Kansei said:
Yash is that avatar pic the turbo you sold to me? it's so mint I love it haha.
Click to expand...

Yup, that is the same turbo I sold you :)

GMalatrasi said:
Is this what you wanted?
Click to expand...

Yup, it's the 5 bolt flange, so you'll need to find a turbo with a T2 flange (GT BB series turbo) Sorry bro. I would start looking for a MSP turbo, or a GT28R (usually sell for ~ $800 brand new) I'm searching for a turbo suitable for you as we speak
 
I have to go to class now... I'll be back soon to continue this torture...
Thanks for the help yashart_mp3.
I really really appreciate it
 
Major bummer man. Hope it works out as easily as possible for you... btw I'm sending out the fitting here in just a few minutes.

Hey yashart... did you get that PM I sent you about the exhaust? I'm guessing it is gone :(
 
Ok I'm back...
I was thinking during class, and I'm still trying to grasp all this:
  1. If I have the wastegate set at 5.8psi,why would it be so bad to use the hybrid?
  2. Can a Tial 38mm flow enough air to not go above that boost pressure?
  3. Since it is a hybrid with the GT28 turbine, wouldnt it spool up fast like the GT28?
  4. I know it wouldnt be very evfficient but What would happen if I use it?
  5. Would it just suck alot more air in because of the monster compressor?
 
GMalatrasi said:
Ok I'm back...
I was thinking during class, and I'm still trying to grasp all this:
  1. If I have the wastegate set at 5.8psi,why would it be so bad to use the hybrid? Larger turbo =more air flow.
  2. Can a Tial 38mm flow enough air to not go above that boost pressure? I don't know this one.
  3. Since it is a hybrid with the GT28 turbine, wouldnt it spool up fast like the GT28? No!
  4. I know it wouldnt be very evfficient but What would happen if I use it? You'd probably reach your 5.8psi @ 5000rpm...
  5. Would it just suck alot more air in because of the monster compressor? BIGGER TURBO =MORE FLOW. And compared to the GT25R that is a lot bigger.
Click to expand...

Like Yash said you'd be better off to sell this monster and get either the t25 or try and search vwvortex.com, or vdubaddiction.com. They upgrade to the gt28rs and may have a used one for sale there.
 
Yeah bigger turbo means more airflow but the point of a hybrid is to minimize the lag right?
so why would it be so much different than a GT28 if it's the same turbine?
yeah the compressor is bigger so its trying to move more air which will slow it down but not that much, will it?
 
khaosman said:
Hey yashart... did you get that PM I sent you about the exhaust? I'm guessing it is gone :(
Click to expand...

Sorry about that, I forgot to PM you back.... but yes, it is sold :(


GMalatrasi said:
  1. If I have the wastegate set at 5.8psi,why would it be so bad to use the hybrid?
  2. Can a Tial 38mm flow enough air to not go above that boost pressure?
  3. Since it is a hybrid with the GT28 turbine, wouldnt it spool up fast like the GT28?
  4. I know it wouldnt be very evfficient but What would happen if I use it?
  5. Would it just suck alot more air in because of the monster compressor?
Click to expand...

1) 5.8psi is still too much.
2)The Tial 38mm will easily vent enough exhaust gasses to keep you at 5.8psi. External wastegates are the king of controlling boost spike. But since you have an automatic, you may still run into issues with spiking. I believe Bigwoofer blew his motor because of this...
3)The GT28RS still spools slower than the stock MSP GT25R turbo. The GT28RS However more than makes up with it in the top end. Also remember that the stock msp turbo has a .64ar turbine housing, while the GT28RS has a .86ar turbine housing. The larger the turbine housing, the more lag you will experience, but with larger turbing housing your peak HP number rises too. The turbo you have will not spool as fast the gt28rs, because of its massive compressor housing. I dont think you realixe just how bid it is. A GT40 Compressor housing is no joke. Keeping things simple, the turbine and compressor housings are matched together, to create a create a turbo thats serve's different applications. There are a lot of variables that play into spool time (time, wheels, ar, etc etc) a good general way to look at it, is that the larger the comp wheel, usually means a slower spooling turbo as well.
4) I honestly can't say for sure what will happen if you use. Running at 6psi, im sure your block wont last long at all. At 3psi, you might be OK if you can keep the car from spiking at all. Honestly, I don't think it is something you should gamble unless you a) have another car you can drive if this motor blows and b) you have the money to buy a new bottom end, forged internals, and possibly other parts that are damaged when the engine gives out.


GMalatrasi said:
Yeah bigger turbo means more airflow but the point of a hybrid is to minimize the lag right?
so why would it be so much different than a GT28 if it's the same turbine?
yeah the compressor is bigger so its trying to move more air which will slow it down but not that much, will it?
Click to expand...


Not exactly. I really don't know why these hybrid turbos are such a hit. They are made to fit a very specific purpose or application. Yes, it will really slow it down that much. And come to think of it, im sure this turbo will have so much compressor surge (not turkey), you'll get tired of very quickly and want to get rid of it
 
I don't even think you can get a spring for the TiAL that's less than 7psi...

I have a brand new (and I mean BRAND NEW, still i nbox) T3/T4 60 trim. It is the perfect turbo for what you're looking for, and is totally safe, but it has a 4 bolt discharge flange, and I think your manifold flange is a T25 style, not a T3. If my turbo would work though, PM me.
 
yashart_mp3 said:
1) 5.8psi is still too much.
2)The Tial 38mm will easily vent enough exhaust gasses to keep you at 5.8psi. External wastegates are the king of controlling boost spike. But since you have an automatic, you may still run into issues with spiking. I believe Bigwoofer blew his motor because of this...
3)The GT28RS still spools slower than the stock MSP GT25R turbo. The GT28RS However more than makes up with it in the top end. Also remember that the stock msp turbo has a .64ar turbine housing, while the GT28RS has a .86ar turbine housing. The larger the turbine housing, the more lag you will experience, but with larger turbing housing your peak HP number rises too. The turbo you have will not spool as fast the gt28rs, because of its massive compressor housing. I dont think you realixe just how bid it is. A GT40 Compressor housing is no joke. Keeping things simple, the turbine and compressor housings are matched together, to create a create a turbo thats serve's different applications. There are a lot of variables that play into spool time (time, wheels, ar, etc etc) a good general way to look at it, is that the larger the comp wheel, usually means a slower spooling turbo as well.
4) I honestly can't say for sure what will happen if you use. Running at 6psi, im sure your block wont last long at all. At 3psi, you might be OK if you can keep the car from spiking at all. Honestly, I don't think it is something you should gamble unless you a) have another car you can drive if this motor blows and b) you have the money to buy a new bottom end, forged internals, and possibly other parts that are damaged when the engine gives out.

Not exactly. I really don't know why these hybrid turbos are such a hit. They are made to fit a very specific purpose or application. Yes, it will really slow it down that much. And come to think of it, im sure this turbo will have so much compressor surge (not turkey), you'll get tired of very quickly and want to get rid of it
Click to expand...

Thanks i kinda understand now.
 
Maxx Mazda said:
I don't even think you can get a spring for the TiAL that's less than 7psi...

I have a brand new (and I mean BRAND NEW, still i nbox) T3/T4 60 trim. It is the perfect turbo for what you're looking for, and is totally safe, but it has a 4 bolt discharge flange, and I think your manifold flange is a T25 style, not a T3. If my turbo would work though, PM me.
Click to expand...

Do you have a pic of the turbo and the flange?
 
what are the main differences between the T3 and GT25/28??
Like oil fittings?
coolant fittings?
cause i already have all the lines and fittings
 
Last edited:
Different flanges, both inlet and discharge on the turbine side. The T3 won't fit your new manifold either
 
Okay, here's the skinny. This is a true T3/T4 Hybrid. (T3 turbine side, and a T04E compressor.) I think Idgrasil was running the same turbo on his P5 awhile back. It's a 60 trim, and all the info can be found in that thread I sent you.

The T25 flange is different than the T3 flange. As for the 4 bolt discharge flange, I have an extra one as well (can be seen in that thread.) Garrett switched to the 4 bolt flange because it performs better than a 5 bolt when an external gate is used. It flows way better.
 
Yashart is correct. I personally prefer the T3 turbos as there's more interchangeability I find. I run a T3 60 trim on my car right now. The reason most guys run the GT28RS's and such is because it has a T25 flange and will fit a stock manifold. Since I started from scratch, I went T3.
 
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