exhaust housing porting

[ellis93]

So.....been thinking again



I read in dieselpower,in a ppump diesel mod article,about a "ported" exhaust housing. They did show the inside of it but the pic was taken too far away to get a great idea of what and how it was ported. My common sense says that the gap in the scroll was enlarged,but by how much?
I can see this being very beneficial as one side is nearly pinched down to half the size of the other.





Question here of course,is anyone know the INS and OUTS of this

[PToombs]

Everybody is freaked out by your weird eyes and is afraid to answer.

[ellis93]

Really,if that's the problem I'll delete it.....of course I really didn't think this forum was full of wussy A girly men

[AHineman]

I really didn't think this forum was full of wussy A girly men

To be fair, you at least new about Levi.

[PToombs]

Good point Hiney!

And don't get all snotty Ellis, I answered you!

[ellis93]

Good point Hiney!

And don't get all snotty Ellis, I answered you!

Oh I'm not being snotty.....yet

[RCCUMMINS89]

Kind of surprises me that no one has done this.............. or actually maybe they have and don't want to help you, you should take this personal at this point.

I'd throw an answer out like I ALWAYS do, but I've never done it...... I'm more of a f it, it'll work.

[ellis93]

Eric....I already did it

I'll post pics after I'm totally done,its a horrific mess right now

[PToombs]

So you're telling us you F'd it all up and are scrambling to find another housing?

I'm not sure where you are talking about grinding, so I'll just wait for the pics.

[ellis93]

Pete here's the article
http://www.dieselpowermag.com/tech/dodg ... rformance/
I looked in my mag today and saw a pretty good pic....better than I thought I seen

Looks like they just gouged out the exhaust Ports that push the exhaust gases to the exducer,effectively reducing the back pressure of the 12cm stock housing. I kinda figure on needing this to happen with my plans for this ppump engine receiving my 7x10s. I'm hopping to hog enough fuel to this truck to make it a very respectable street beater here where I live. I know it wouldn't be schit at the heavier diesel seen of the mid-west but here its a whole nother world

[D-dog357]

A while back I was asking about porting the HX housing and the answers I got was that it was choked down (the something or another ring) to increase the velocity going into the wheel for quicker low end spool-up. Seemed like a reasonable answer to me for those running mostly stock. After all the HX35 only builds a max of about 35psi. After reaching that point your just adding wear to the bearings. Better to feed the wast-gate then over spool the turbo.

I ground the housing to make both "halves" flow more evenly. Opened up the waste gate till there is only about a 1/16th of an inch lip for the flapper to seal against, drilled a 1/2" cross port and ported the bolt flange to the gasket and smoothed it out a good 2" back from the opening. Have yet to install it though as I ordered a turbo rebuild kit as it has 220k miles on it. Should be here any day, hope to get it installed in the next week depending on my work load. I wanted to do everything to the turbo once so that it will done and take what I might throw at it later. On my budget the only other turbo work I might do to it is a 60mm up-grade. Right now though I need the money for a 4" down pipe.

BTW; dose anybody have a stock silencer ring laying around ? After opening up my air box I discovered that my ears don't like the pitch of the turbo's song