i ported from 6m to a 7 cm, manifold and turbo

[pj91gsx]

i ported out my 1g housing 7cm and my manifold to a 7 cm. i just wanted to show my work. im impressed with how well it turned out. I used a 16g spacer that went in my 16g that i sold, to make the housing big enough to fit the spacer in it.

 

[toofast82]

Looks pretty decent, looks like you tried to radius the wastegate entry some too.
The main advantage of the 7cm is that the volute and a/r is larger all together than the 6cm though.
It's like a .42ar compared to .48ar.

 

[Project2G]

Is that a crack in the first picture?

 

[whe3ls]

it kinda looks like one

 

[habitatguy187]

Port work looks pretty good, but just in case you didn't know a 7cm housing is still bigger. It's not just the size of the entry, it's also bigger around the turbine wheel. You might already know this but I thought I'd point it out since your thread title makes me think otherwise.

 

[fwdmaster]

Porting came out good pj91gsx, time to get those parts ceramic coated

 

[solidviper89]

It looks good, you should remove material to make sure the wastegate opens all the way. This does not take long, and it worked out when I did it.

 

[JusMX141]

It looks good, you should remove material to make sure the wastegate opens all the way. This does not take long, and it worked out when I did it.

Must've been all in your head, because porting the housing so the flapper can open all the way is a complete waste of time. The actuator will only allow the flapper to open 3/8" max.

 

[dsm-onster]

Which exhaust manifold is that?

 

[pj91gsx]

It looks good, you should remove material to make sure the wastegate opens all the way. This does not take long, and it worked out when I did it.

i did remove that material and then i tested the wastegate to see if it works and was thinking, at least it hot air wont get caught in that spot anymore.

Which exhaust manifold is that?

2g

Looks pretty decent, looks like you tried to radius the wastegate entry some too.

i did.

Is that a crack in the first picture?

it kinda looks like one

it got hot. ive seen much worse cracks.

Port work looks pretty good, but just in case you didn't know a 7cm housing is still bigger. It's not just the size of the entry, it's also bigger around the turbine wheel. You might already know this but I thought I'd point it out since your thread title makes me think otherwise.
Today 03:39 AM

isnt it the same as a big 16g? and the Evo3 turbine wheel is bigger? i know the outlet of an evo3 turbo housing is 2.5 inch.

 

[dsm-onster]

No. When he means 'bigger around the turbine wheel', he means the volute. Your volute still necks down after the entry before the turbine blades. You didn't change the a/r of the housing doing this. A 7cm^2 housing has a larger a/rthan a 6cm^2housing. And porting the inlet to 7cm DIAMETER doesn't have anything to do with 7 square cm of area. Ifyou measure, you will see that your inlet diameter is infact only 6.5cm wide. So you didn't increase flow of the housing at all. All you did was increase flow of the transition. Since you have a 2g manifold, you could have just installed the seal ring and have just as smooth a transition. . .

. . .Now you've increased the volume of the collector. Larger volume lowers velocity; smoothing increases velocity. So it comes out in the wash. A seal ring wouldn't have taken hours of work though

 

[pj91gsx]

No. When he means 'bigger around the turbine wheel', he means the volute. Your volute still necks down after the entry before the turbine blades. You didn't change the a/r of the housing doing this. A 7cm^2 housing has a larger a/rthan a 6cm^2housing. And porting the inlet to 7cm DIAMETER doesn't have anything to do with 7 square cm of area. Ifyou measure, you will see that your inlet diameter is infact only 6.5cm wide. So you didn't increase flow of the housing at all. All you did was increase flow of the transition. Since you have a 2g manifold, you could have just installed the seal ring and have just as smooth a transition. . .

. . .Now you've increased the volume of the collector. Larger volume lowers velocity; smoothing increases velocity. So it comes out in the wash. A seal ring wouldn't have taken hours of work though

i ported the manifold and turbo so it would fit a 7cm 16g ring in both of them.

 

[Steve93Talon]

i ported the manifold and turbo so it would fit a 7cm 16g ring in both of them.

No you didn't, you ported away the step where a ring would have sat. If you put a ring in there now, it's only going to disrupt flow and rattle around.

 

[turbo addict]

And if anyone is old enough and remembers, the 8cm that they uesd to make had the smaller 6cm size entry but would still have much more top end flow.

 

[dsmdeliveryboy]

And if anyone is old enough and remembers, the 8cm that they uesd to make had the smaller 6cm size entry but would still have much more top end flow.

I'd def like to know more about this.

 

[dsm-onster]

They have a td06 8cm^2 housing for the the old sy/ty platform. . . I cant remember if they made one for the td05h turbine wheel.

 

[pj91gsx]

No you didn't, you ported away the step where a ring would have sat. If you put a ring in there now, it's only going to disrupt flow and rattle around.

let me show you a picture later so you will understand. I went from a smaller ring 14b, to a 16g ring size, from porting it out. I could put the ring back in it, because i ported it to where i could put the ring in it, so i knew it was ported big enough. Ya there isnt a step for the ring to sit one perfectly, but it will still sit in there with out moving. putting the ring back in is a waste anyway.

 

[JusMX141]

They have a td06 8cm^2 housing for the the old sy/ty platform. . .

It's DSM-flanged?

I just wondered what this housing was intended to be used on from the factory...it's labeled "78", which generally means it was intended for a TD05H turbine (general rule of thumb is 49177 = TD04, 49178 = TD05, 49179 = TD06). I just wondered what the hell would've come from the factory with a DSM-flanged, 8cm turbine housing:

 

[dsm-onster]

Nope. T3 flanged on one end MHI flanged on the other. Click.

 

[pj91gsx]

so it was a grand national turbo? the typhoons have the grand national engines.

 

[turbo addict]

Nope. T3 flanged on one end MHI flanged on the other. Click.

No they made a 8cm dsm inlet and outlet. A friend bought one from turbotrix back in 1998 or 1999. It has a 6cm size inlet though. It came on a 20g as an option. This was not the super16 and 20g from hahn it is dsm all the way threw. It is still on a old friends car. I dont talk to him anymore though.

Damn kids nowa days!! think they know everything! ;-)

 

[jking29]

so it was a grand national turbo? the typhoons have the grand national engines.

Cyclone's and Typhoons did not use the Grand National motor. They have a 4.3 Chevrolet based motor. The Grand National used a 3.8 based on a Buick motor. They are completely different and share no parts.

 

[dsm-onster]

No they made a 8cm dsm inlet and outlet. A friend bought one from turbotrix back in 1998 or 1999. It has a 6cm size inlet though. It came on a 20g as an option. This was not the super16 and 20g from hahn it is dsm all the way threw. It is still on a old friends car. I dont talk to him anymore though.

Damn kids nowa days!! think they know everything! ;-)

Learn something everday

 

[thilaksharma]

there is also another alternative 8cm housing
its from the TC MHI series

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the turbine inlet flange is same as the td05's

and yes, its quite rare to get this housings, they are now framed in the museum lox
bt yeah 8cm , in my life i have only seen one piece

 

[dsm-onster]

I would like to see the 18g compressor mated to the td05h turbine wheel in an 8cm^2 housing. That would be a nice combination. It may flow the same or better at a lower pressure ratio (before turbine / after turbine = PR) than a td06sl2 7cm^2 combination. Lower PR is lower backpressure

But negating backpressure is best done with twinscroll, to which mitsubishi and all the other auto manufacturers have migrated.