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2G 2g manifold and turbo porting

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gst-turbo

Proven Member
677
58
Nov 7, 2012
Petaluma, California
I been struggling with boost creep for a while the set up on the car is a 16g turbo with a stm 02 dump. I first ported the turbo but it dident do much and a month later pulled it out again and re ported the waistgate even more made a little difference. My question is that I have a 7cm housing but I have a stock 2g manifold that is not ported at all will this make it boost creep. Also when installing the 16g turbo the o2 housing gasket did not line up at all I'm looking for a link to the correct gasket. I think I used a 14b gasket and thanks for any help
 
Are we talking about a Genuine MHI 16G turbo here or an eBay knockoff....or a Genuine turbo with the turbine housing from a knockoff? The wastegate hole on the knockoffs is about the size of a dime from the factory, notoriously causing incurable boost creep.

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The wastegate hole on the knockoffs is about the size of a dime from the factory

on mine its the opposite, the knock off has a bigger WG port than the MHI

MHI

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Knock off on left, MHI on right

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Knock off

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here are the gaskets
1g part# MD124675
2g part# MD191897
im not sure on the evo3 part number but you can get all 3 HERE

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If you think a Taiwan-made CHSH housing that was used on the Evo III GT turbos will help get rid of your boost creep, i have one that i am willing to part with.

And here are a few links to posts that might be relevant:
http://www.dsmtuners.com/threads/go...6g-will-my-o2-housing-and-gasket-work.378949/

http://www.dsmtuners.com/threads/new-solution-to-16g-boost-creep.428843/
 
It's genuine Mhi Hotside and it ported a good amount and the other question was if my 2g manifold is not ported at all and the Hotside is a 7cm with that make it creep because of the manifold hole is small compared to the 7cm
 
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