Wastegate
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Wastegate
Could someone fill me in on the difference of internal and external? Just for a future high horsepower engine which would be the better why to go or is there really a difference? I guess thats the only parts of the turbo I don't know about really. Thanks
Originally Posted by HyaBoosta
If your looking for a high power build then I say you must go external. they can hold alot more pressure and less spiking.
+
internal - is built onto the turbo
external - it has a flange on the manifold where you can mount the wg.
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Just out of curiousity, at what PSI level is it generally recommended to use an external over an internal? IMO I think most people are just wasting their money on the external wastegates when turboing their D17s...
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Rep Power: 0 ^^^Has it been dyno proven to provide better HP gains? I imagine if so, then it would be due to exhaust flow design characteristics. I dont know if I've ever read that anywhere, but I do believe that I have read that the internal wastegates work just fine within a certain boost margin which is the only reason why I would think people are wasting their money on externals if they are staying within the safe margin for an internal WG (stock internals and etc.) I'm still new at this so if I'm wrong, forgive me. 
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Meh, internal is good enough when your running a 25/28 and arn't making like 300whp LOL. Remember not all of us are ballers. *looks at empty wallet* =*(
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Rep Power: 0 LOL thats also what I was thinking too so dont worry. You're not the only one, but actually I'm gonna run a t3 .42/.48 with an internal gate at 8 or 9 psi daily on stock internals. I think should be fine.
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Rep Power: 0 I would bet 90% of T3 based turbines are internally gated.
The reason an external makes more power is that the exhaust flow from the turbine isn't hit with the dump from the wastegate. This causes turbulance and therfore less hp.
This is general info for the type of internal that dumps into the same hole as the turbine. Some are seperated out and therefore perform better.
The reason an external makes more power is that the exhaust flow from the turbine isn't hit with the dump from the wastegate. This causes turbulance and therfore less hp.
This is general info for the type of internal that dumps into the same hole as the turbine. Some are seperated out and therefore perform better.
this may sound moob but as long as we are on the topic of wg
is it possible to remove the wastegate off an internally gated turbo?
the reason i ask is that i bought a garrett t25 internally gated turbo off ebay and the seller couldnt give me more info on that
is it possible to remove the wastegate off an internally gated turbo?
the reason i ask is that i bought a garrett t25 internally gated turbo off ebay and the seller couldnt give me more info on that
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Originally Posted by dannn
this may sound moob but as long as we are on the topic of wg
is it possible to remove the wastegate off an internally gated turbo?
the reason i ask is that i bought a garrett t25 internally gated turbo off ebay and the seller couldnt give me more info on that
is it possible to remove the wastegate off an internally gated turbo?
the reason i ask is that i bought a garrett t25 internally gated turbo off ebay and the seller couldnt give me more info on that
they sell plates that bolt on to the T3 turbos so that you can convert them to external but I dunno about the t25.
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Rep Power: 0 Regarding sizes needed for external wastegates. Tial makes a 35mm, a 38mm I believe now, a 40mm and a 44mm.
The MORE boost you are going to run, the smaller the wastegate you can get away with. For instance, an EVO running 22-24psi can run a 35mm wastegate no problem. However, if he wanted (hypothetically) to turn the boost down to 9psi (which he wouldnt do), he would need a bigger wastegate as the 35mm probably couldnt flow enough air.
Remember, the more boost you run, the SMALLER the wastegate can be, and vice versa, when running small boost, you need a bigger wastegate because you need to bypass much more exhaust (thus exiting through the wastegate).
If you see race cars thats run 40psi, and they have the 44mm external, its just because its the biggest baddest external made, they really dont need it. Ask anyone!
If I upgrade my turbo I will most likely get a 35 or 38mm Tial.
The MORE boost you are going to run, the smaller the wastegate you can get away with. For instance, an EVO running 22-24psi can run a 35mm wastegate no problem. However, if he wanted (hypothetically) to turn the boost down to 9psi (which he wouldnt do), he would need a bigger wastegate as the 35mm probably couldnt flow enough air.
Remember, the more boost you run, the SMALLER the wastegate can be, and vice versa, when running small boost, you need a bigger wastegate because you need to bypass much more exhaust (thus exiting through the wastegate).
If you see race cars thats run 40psi, and they have the 44mm external, its just because its the biggest baddest external made, they really dont need it. Ask anyone!
If I upgrade my turbo I will most likely get a 35 or 38mm Tial.
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