Stock .84 Housing Modification

[JAP]

That'd be cool if it works the way I plan! LOL

But in reality, I'm pretty sure it was Cody or Cletus, or whatever he goes by these days that told me about this initially.

 

[Hotrodtractor]

I drove a truck in 2008 or 2009 that had very similar modifications to this done to the stock turbo - I seem to remember that the owner did do before and after back pressure readings on both banks but don't recall specifics and I could be mistaken entirely, but I do know that the housing was opened up between the volutes right at the wastegate hole to help equalize some stuff out and that the turbo was living under higher than normal boost conditions.

I'll have to see if I can get him on here to comment and talk about it.

 

[WIESEL]

My 1.15 housing is coming off and I am gonna try this on the original housing.
something to tinker with while I put a gate on my 1.15 housing

 

[TARM]

Are you going to actually put the gate into the volutes of the scroll of the housing? If so not sure I would do that unless that is the ONLY place you have room for it. The air flow in that housing is very critical to how that turbine side will act.

 

[WIESEL]

Are you going to actually put the gate into the volutes of the scroll of the housing? If so not sure I would do that unless that is the ONLY place you have room for it. The air flow in that housing is very critical to how that turbine side will act.

Where would you put the gate? I figured it would be worth a try.
I will be getting injectors before a turbo upgrade and considering my r for another project, compounds.

My SD will eventually have a s475.

Sorry for the derail.

 

[Fly By Night]

Well my e99 turbo is getting yanked for a rebuild soon, I'm Sub'd and may hafta break the die grinder out and play around

 

[TARM]

On the collector would be my first thought. A bypass pipe off each up pipe to a collector between them to mount the WG on it would be another.

Here is the issues.

One cast iron is a PITA to weld to but it can be done.

The real issue is the effect on the function of the housing. The scrolls are set at a specific ratio, volume. and shape. When you put even a small height tube and WG on it you are changing its volume and ratio.


This is also the area where you get all the velocity for the air flow that spins the wheel. It relies on that very smooth, reducing in volume as they go volutes. Now you have a tube going off it that no matter how much you try to match the angle is going to disrupt that flow as well as all of a sudden a jump in the volume.

 

[TrailerHauler]

Are you going to actually put the gate into the volutes of the scroll of the housing? If so not sure I would do that unless that is the ONLY place you have room for it. The air flow in that housing is very critical to how that turbine side will act.

There's been a handful of people that have put gates on the exhaust housing of a 38r, in a compound set up with great success. Charles being one of the people, I've only heard positive things about how well it works.

 

[JAP]

RPM INC did it on his van as well.

 

[TARM]

I in no way said it would not work. There is a difference between something not working at all and something causes a decrease in performance compared to another setup. Point being that putting it on the turbine housing is going to have more negative effects than putting it on the collector or somewhere after the manifold and before the turbine housing. It certainly does work as I had already know people that have done this. It is done in a number of gasser setups with even turbine housings casted with the WG mount integrated into it. They are for those with limited room. But its a trade off and not ideal. I believe a few were tested back to back but it was small cu inch gas engines. Maybe the effects are lessened on big cubic inch high boost diesel engines as after all we are bleeding off far less than the lower boost gas engines run.

As I said before from everything I have read and seen it would not be my first choice given the other choices available in this setup..

 

[Big Bore]

I talked with someone about trying to put a WG on the stock collector and he said there just isn't room. Maybe someone else has a different idea and I would certainly be open to that as it was a mush more convenient way to deal with having to WG and avoided the hole in the housing.

 

[TARM]

I forgot we are talking stock here on that. Maybe the housing is the way to go. It would be good if the guy HRT is thinking of could come on and give some first hand before and after info. As how something should work on paper can be very different that what happens in the real world where things never thought of come into play.

 

[SouthFlstrokin']

id love to see a stock one to compare...

 

[Dieselfever]

I drove a truck in 2008 or 2009 that had very similar modifications to this done to the stock turbo - I seem to remember that the owner did do before and after back pressure readings on both banks but don't recall specifics and I could be mistaken entirely, but I do know that the housing was opened up between the volutes right at the wastegate hole to help equalize some stuff out and that the turbo was living under higher than normal boost conditions.

I'll have to see if I can get him on here to comment and talk about it.

I've rode in Brandon's truck with this mod, I can't remember what nozzles he has on his 160cc a-codes, but I remember it seemed to work good. I'd say if you don't plan on upgrading from the stock turbo or like Matt said have a 38R with 1.0 housing then this would be worth while mod.

-Michael