Evo3 16g, Porting, and Manifold Questions

[ian_maham]

Got some questions here, and yes I have searched and my eyes are blood shot red.

1. When you port the manifold do you port the inlet from the turbo or the outlet that goes into the block?

2. I plan on getting an Evo316g, should I port the inlet on the 2g manifold to 7cm?

3. Is the Evo316g already 7cm standard, if not should I port it to 7cm?

4. Should I get an Evo3 O2 housing or stay with the 2g O2 housing and port it if needed?

5. Also, what's the difference between 2g manifold and Evo3 manifold? They look the same in the picture I provided.


Thanks for any replies,
Ian

 

[viperlp01]

1. When you port the manifold do you port the inlet from the turbo or the outlet that goes into the block?You dont want to touch the inlet going into the turbos compressor.. I would try to gasket match the cold sides outlet.Then port the j-pipe to match as well. That should really help to move some air.. I was pushing 38ish lbs/min and i was so suprised when i took off my j-pipe.. there was a huge lip that i should have ported.. Im sure i would have hit 40lbs/min

2. I plan on getting an Evo316g, should I port the inlet on the 2g manifold to 7cm?It is 7cm^2 so it isn;t really 7cm in diameter.. I would also try to order a 7cm^2 gasket and gasket match both the turbo and manifold. I would try to focus on making everything as smooth and free flowing as possible.

3. Is the Evo316g already 7cm standard, if not should I port it to 7cm?If it is evo 3 then it should already be.. You can do a polish to the inlet of the exhaust side to make it smooth

4. Should I get an Evo3 O2 housing or stay with the 2g O2 housing and port it if needed?An evo 3 o2 housing will require you to make modifications to your downpipe.. I would just do some porting to the stock o2 housing and use that money else where..

5. Also, what's the difference between 2g manifold and Evo3 manifold? They look the same in the picture I provided.Really the main difference is the outlet on the evo 3 should already be 7cm^2. So you can by all means port the runners(gasket match) and port the outlet out to match the evo 3 inlet..

Hope that helps

 

[Rob10_99]

You have both of those manifolds? I assume that pic you took?
First thought is to just port match whichever one will be of use to you. Since it's used, was it used on your head? Either way, just port match it from a new exhaust manifold to head gasket and possibly the 7cm if that's what your turbine housing inlet is.
Doesn't matter what you have or what you are replacing, think of it as "hey this is a new part, what will make it flow"
See the carbon buildup where the exhaust gas has turbulence getting around the 'new edge' ?

 

[ian_maham]

1. When you port the manifold do you port the inlet from the turbo or the outlet that goes into the block?You dont want to touch the inlet going into the turbos compressor.. I would try to gasket match the cold sides outlet.Then port the j-pipe to match as well. That should really help to move some air.. I was pushing 38ish lbs/min and i was so suprised when i took off my j-pipe.. there was a huge lip that i should have ported.. Im sure i would have hit 40lbs/min

2. I plan on getting an Evo316g, should I port the inlet on the 2g manifold to 7cm?It is 7cm^2 so it isn;t really 7cm in diameter.. I would also try to order a 7cm^2 gasket and gasket match both the turbo and manifold. I would try to focus on making everything as smooth and free flowing as possible.

3. Is the Evo316g already 7cm standard, if not should I port it to 7cm?If it is evo 3 then it should already be.. You can do a polish to the inlet of the exhaust side to make it smooth

4. Should I get an Evo3 O2 housing or stay with the 2g O2 housing and port it if needed?An evo 3 o2 housing will require you to make modifications to your downpipe.. I would just do some porting to the stock o2 housing and use that money else where..

5. Also, what's the difference between 2g manifold and Evo3 manifold? They look the same in the picture I provided.Really the main difference is the outlet on the evo 3 should already be 7cm^2. So you can by all means port the runners(gasket match) and port the outlet out to match the evo 3 inlet..

Hope that helps

Dude... Thanks that helped out a lot. appreciate it.

 

[ian_maham]

You have both of those manifolds? I assume that pic you took?
First thought is to just port match whichever one will be of use to you. Since it's used, was it used on your head? Either way, just port match it from a new exhaust manifold to head gasket and possibly the 7cm if that's what your turbine housing inlet is.
Doesn't matter what you have or what you are replacing, think of it as "hey this is a new part, what will make it flow"
See the carbon buildup where the exhaust gas has turbulence getting around the 'new edge' ?

No those aren't my manifold, I got them off the website. And I will have to check for the carbon build up.

 

[viperlp01]

No problem man.. Just dont go absolutly crazy on the porting.. If you go too thin on some spots it will crack easier which will ruin all the time spent on porting it.. ]

Its hard to find a 7cm^2 gasket.. I think ebay might have some and maybe some vendors but just to let you know if you can't find one its about 6.5 cms...

Take your time and when you get done porting if the surface is rough then try going over it with something to polish it up.. I used a dremel tool with a 80 grit sander bit and it smoothed it pretty good..

 

[ian_maham]

No problem man.. Just dont go absolutly crazy on the porting.. If you go too thin on some spots it will crack easier which will ruin all the time spent on porting it.. ]

Its hard to find a 7cm^2 gasket.. I think ebay might have some and maybe some vendors but just to let you know if you can't find one its about 6.5 cms...

Take your time and when you get done porting if the surface is rough then try going over it with something to polish it up.. I used a dremel tool with a 80 grit sander bit and it smoothed it pretty good..

man I'm not skilled enough to do my own porting nor do I have the tools for it. Pretty sure you need a air powered dye grinder or something like that. All I have are sockets and screw drivers . I'll have them professionally done/ find a local dsmtuner.


Thanks,
Ian

 

[No_Skillz]

You can do it with a cheap electrical grinder and a carbide burr.

 

[Dsmj89]

If you are worried about porting and boost creep issues just get a hafe exhaust manifold that already comes with the wastegate provision and get a tial and call it a day.

 

[matthewdesigns]

You can get the 7cm^2 gaskets from Road Race Engineering, that's where I found mine. The multilayer kind, not the solid one, but I think they sell both.

Do not touch the short dividers in the exit area of the manifold, only the opening itself. If you take a look at the other photos in my gallery of the comparison b/t the 2g and Evo3 manis, you'll see what I'm talking about. Those dividers 'point' the exhaust gasses towards the turbine housing.

You could also smooth the step/sealing ring portion of the turbine housing if you are going to remove it from your manifold. Mine is gone from the manifold in my photos.

 

[92AWDHX40]

Good thread, i wanted to port my own evo but, got it by chance, thanks for the input so i can find that gasket.

 

[turbo addict]

You can get the 7cm^2 gaskets from Road Race Engineering, that's where I found mine. The multilayer kind, not the solid one, but I think they sell both.

Do not touch the short dividers in the exit area of the manifold, only the opening itself. If you take a look at the other photos in my gallery of the comparison b/t the 2g and Evo3 manis, you'll see what I'm talking about. Those dividers 'point' the exhaust gasses towards the turbine housing.

You could also smooth the step/sealing ring portion of the turbine housing if you are going to remove it from your manifold. Mine is gone from the manifold in my photos.

the roadrace soild gasket is a good one too. I have had it on my car with 2 different turbos over 7 years and still using the same gasket from roadrace. hasn't leaked ever.

 

[matthewdesigns]

Good to know, turbo addict. Thanks for the word.

 

[Dallas J]

I also use the solid gasket and just block sand it to make sure its flat if I pull it off.

Ive had lots of problems with bolts lossening up so the layered gasket was getting killed often, and at like $10 each was annoying. The solid gasket may not seal as well, but I dont notice any leaks when using seafoam (minimal smoke in the engine bay), and its lasted quite a long time.

 

[turbo addict]

I also use the solid gasket and just block sand it to make sure its flat if I pull it off.

Ive had lots of problems with bolts lossening up so the layered gasket was getting killed often, and at like $10 each was annoying. The solid gasket may not seal as well, but I dont notice any leaks when using seafoam (minimal smoke in the engine bay), and its lasted quite a long time.

I have had mine off just 3 or 4 weeks ago. still looked good and it doesnt leak on my car. I'm up to 40psi of boost. There has to be way more backpressure than that with the e316g.

 

[ian_maham]

Okay so I have decided to get the Evo3 16g and get the 2g manifold ported to 7cm to match the 16g's exhaust gas inlet.

What should I get the stock 2g 02 housing ported to, to match the 16g?