Buying a PTE 50-trim

[xdime00]

Yes, im jumping on the bandwagon and buying one. My one question that i dont understand is why not to have a cut divider with an 02 dump? is this because it will flow normal exhaust out the dump at all times and sound like ass? I also have read people have had issues with it when it was uncut? Id like to keep it internally gated and still run my O2 dump. My goals with this turbo is 11.9 on pump with proper supporting fuel mods. Is this realistic. Thanks, thats all i have for now.... and does anyone have a link to where the turbo trims and numbers are explained so they make sense?

 

[1fast97gsx]

I don't understand your question .. yes 11.9 is possible. Why would an open dump after the wastegate affect it?

 

[xdime00]

I don't understand your question .. yes 11.9 is possible. Why would an open dump after the wastegate affect it?

If you look at this link on the bottom of the page they show a comparrison http://www.extremepsi.com/store/customer/product.php?productid=16454&cat=506&page=1

 

[alIan]

Yeah if you have an O2 dump (not into the exhaust, into the engine bay), then if you get it cut as shown in the link, you will ALWAYS be throwing exhaust out that dump into your bay, not just when your wastegate opens. This not only will probably stain stuff in your bay with exhaust fumes (depending on where your dump is aimed), but will probably stink and sound different. If you dump your O2 it is, in my opinion and extremePSI's, wise not to get that baby cut out.

 

[xdime00]

Are there any issues with not cutting the divider since i would like to keep my O2 dump that i already have?

 

[mitsugsx95]

If you currently have an 02 dump and you get the 50trim with the cut housing, you dont need the dump anymore. You can just throw your stock (maybe ported) o2 housing on and it will be fine.

And it wont sound like ass anymore.

 

[hostile]

Just order the uncut housing. Bolt in the turbo and keep your dump.

Don't throw the stocker on there if you already have something better.

 

[Blk_99gst]

If you currently have an 02 dump and you get the 50trim with the cut housing, you dont need the dump anymore. You can just throw your stock (maybe ported) o2 housing on and it will be fine.
And it wont sound like ass anymore.

O.K., that makes NO sense at all. Why would you NOT need the dump anymore if you get a 50trim with a cut housing. Sure you can put a regular o2 housing back on there, but then you lose all the benefits of the o2 dump (releasing the gases from the wastegate faster).

I would say get the uncut housing, and keep the o2 dump. Even if you didn't dump the o2 housing, I wouldn't get the cut turbo housing, just in case you wanted to o2 dump in the future. The cut turbo housing just doesn't seem to make sense to me; why anyone would want it unless you knew you NEVER were going to o2 dump.

 

[ItsStockOfficer]

O.K., that makes NO sense at all. Why would you NOT need the dump anymore if you get a 50trim with a cut housing. Sure you can put a regular o2 housing back on there, but then you lose all the benefits of the o2 dump (releasing the gases from the wastegate faster).

I would say get the uncut housing, and keep the o2 dump. Even if you didn't dump the o2 housing, I wouldn't get the cut turbo housing, just in case you wanted to o2 dump in the future. The cut turbo housing just doesn't seem to make sense to me; why anyone would want it unless you knew you NEVER were going to o2 dump.

The cut housing flows significantly better through the internal.

 

[hostile]

It might work to help lower boost, But if you read most suggestions you want the wastegate gasses seperated from the turbine gas until it starts to flow straight.

If you think about it the gas exiting the turbine is going to be moving different from the gas coming from the wastegate port. If you have them mixing together it is going to make it flow different.

Just order the uncut housing, and if your dump doesent work, ditch the internal gate and get a tial 38mm.

 

[DCJ98GST]

They cut the housing to create turbulance after the turbo thus reducing the effeciency of the turbine and reducing boost creep. Thats why people can turn the boost down and not creep with this internal gated turbo. You will reduce the creep but loose flow capacity and a little top end.

 

[1fast97gsx]

ok I get your question now. If you want to keep the dump then you want the housing uncut. If you want to shoot the stuf from your wastegate back into the exhaust then you can get the cut housing. I'd personally get the uncut and bolt it up to your dump setup.

 

[mitsugsx95]

The thing is, if you get the uncut housing, most likely you will creep even with a o2 dump (ive been there, trust me). The cut housing, as everyone has said, will reduce boost creep and help control the boost for lower levels. If you have the cut housing + the o2 dump, you will be dumping to the atm. everytime you drive the car, even if you arent building boost. The obly way to use the o2 dump, is to have a non-cut housing, hence, boost creep. So, its a double edge sword.

If you are on a budget and are considering a 50 trim, i would think about it twice. If you dont either have the money or tuning experience (not sayin you dont), you would be better with a 16g or comp.

 

[coltboostin]

If the turbine housing is ported correctly, then you will not creep, period.
The cut turbine housing is unesesarry if the turbine housing is ported correclty, alowing enough exaust gases to bypass the turbine wheel, and stop the rising boost.

 

[STECARS]

If the turbine housing is ported correctly, then you will not creep, period.
The cut turbine housing is unesesarry if the turbine housing is ported correclty, alowing enough exaust gases to bypass the turbine wheel, and stop the rising boost.

I was told when i ordered mine, that the pte housing all came with a 7 cm ported housing. So you have no porting to do. IMHO the uncut housing cant be bad in anyway, even if you dump. Just think of it like running with no downpipe.

 

[NOSLO2PT0]

The issue with the cut or uncut housing isn't with a dump tube, it's about controlling boost creep. DCJ98GST has it right with the boost control. You sacrifice efficiency in the name of controlling boost creep. After you buy the PTE, start saving up for the rebuild for when it takes a shit on ya.

 

[coltboostin]

Just because it is "ported" from whatever company you purchase it from, does not mean it was ported correctly. 90% of the time they just take a large cone bit and slam it in their to make it lok nice and pretty, and do no touch the wastegate inlet which is the most important part.

Aslo, the cut housing is bad for performance. You want the exit velocity of the gases past the turbine wheel to be as fast as possible, to get the most performance. Throwing in the wastegate gases will make that area extremly turbulent, slowing the flow, and restricting power.

 

[Black95TSIawd]

i have read this thread and am very very confused. Who gives a #### if he's gonna have an o2 dump with the cut divider. Its still an internally gated turbo therefore the cut divider would help controll boost better regardless if its in the exhaust or out another pipe? Just as long as he doesnt go external on the o2 he should be fine, no?

 

[coltboostin]

Calm down buddie, think about it for a sec.

If you have a cut divider, exaust will be flowing into the wastegate passage all the time.

If you have a atmospheric wastegate dump, your wastegate is, well obviously open to the outside.

So, if you have a cut divider, and an open dump, you have exaust freely getting dumped out of the exaust ALL THE TIME, like a massive exaust leak.

Clear things up?

 

[mitsugsx95]

Calm down buddie, think about it for a sec.

If you have a cut divider, exaust will be flowing into the wastegate passage all the time.

If you have a atmospheric wastegate dump, your wastegate is, well obviously open to the outside.

So, if you have a cut divider, and an open dump, you have exaust freely getting dumped out of the exaust ALL THE TIME, like a massive exaust leak.

Clear things up?

Good god, its about time. THANK YOU.

Whats so hard to understand about that setup?

Cut + dump = no no :thumbdown

 

[STECARS]

Just because it is "ported" from whatever company you purchase it from, does not mean it was ported correctly. 90% of the time they just take a large cone bit and slam it in their to make it lok nice and pretty, and do no touch the wastegate inlet which is the most important part.

Aslo, the cut housing is bad for performance. You want the exit velocity of the gases past the turbine wheel to be as fast as possible, to get the most performance. Throwing in the wastegate gases will make that area extremly turbulent, slowing the flow, and restricting power.

the housing is made ported already from PTE. And the cut is not bad. Its to eliminate boost creep and let the wastegate gases pass through the downpipe if they have to.

 

[MNGSX]

Look at how a WG opens...

The flapper actually deflects gas flow towards the wall that was cut out..

The cut does three things. Allows more flow thru the gate, gives it a bigger area to dump to and decreases flow thru the turbine whent the gate is open...

One can accomplish the same thing with an uncut housing by cutting the stock o2 housing divider out...

I don't like o2 dumps so I have my own o2 housing in progress on the welding bench that recirculates considerably farther back than any I have seen before..

 

[coltboostin]

the housing is made ported already from PTE. And the cut is not bad. Its to eliminate boost creep and let the wastegate gases pass through the downpipe if they have to.

Well, made ported already is a retarted statement, just say it to yourself a couple of times and let it sink in.

PTE has a CUSTOM CAST trubine housing with an inlet and nozzle area they designed for their hybrid turbo's, if that is what you mean.

 

[herostar]

just have an exhaust shop weld on some pipe that connects your dump back into your downpipe...

 

[STECARS]

Well, made ported already is a retarted statement, just say it to yourself a couple of times and let it sink in.

PTE has a CUSTOM CAST trubine housing with an inlet and nozzle area they designed for their hybrid turbo's, if that is what you mean.

you get the point , they are a 7cm ported housing.