Removing my 14B for porting?

[4G63dsmpwr]

I want to port my 14B and I was wondering how much of a project this is going to be. I've ported a turbo before, but never had to remove one out of a car. I'm not going to remove the manifold or anything just drop it out of the bottom. Am I going to leak a lot of oil or coolant? Thanks, Erick.

 

[TSi92]

You will leak a lot of coolant but not too much oil. Make sure you drain the motor oil, unless you unbolt the oil return pipe from the turbo itself instead of the oil pan. And yes it's worth to port the turbo, but don't port the turbine housing too much or you gonna get bad boost creep.

 

[4G63dsmpwr]

Well I already have the 02 housing and the exhuast side of my 14B ported. Will this help with eliminating creep? I should step down the little lip thats on the inlet right ? Make that all smooth? Any other areas need porting, any tricks or special ways you guys do things? I wanna take this out once and hog the hell out of this as much as possible. Thanks for the response. Erick

 

[twistedtsi]

can u explain to me wat boost creep is i hear diffrerent thigns all the time and i wanna kno wat u guys say

 

[echo]

boost creep is exactly how it is said. the boost creeps higher then you set it or it is set. too much boost can = bad for the motor. that's why it's always good to have a boost gauge.

that's what i gather the definition is.

 

[Taboo]

Originally posted by TSi92
You will leak a lot of coolant but not too much oil. Make sure you drain the motor oil, unless you unbolt the oil return pipe from the turbo itself instead of the oil pan. And yes it's worth to port the turbo, but don't port the turbine housing too much or you gonna get bad boost creep.

There's no need to drain the oil since the outlet of the oil return line is located above the oil level in the oil pan. Re-installing the oil return line after disconnecting it from the turbo cartridge is a PITA.
Porting the turbine housing (= the outlet of the turbine housing) has no effect on boost creep (if followed by unported O2 housing and stock exhaust) and yields no performance gains if not followed by ported O2 housing and efficient (2.5-3") exhaust system. Boost creep is caused by high efficient exhaust and low efficient wastegate since exhaust gases like to travel to the pipe with the lowest backpressure (in which case it's the high efficient exhaust). To get rid off boost creep, the wastegate outlet (hole) and housing must be enlarged as well as the wastegate dump of the O2 housing to increase its efficiency and reduce the backpressure.

As for how much of a project porting a turbo can be, one can spend well over 10 hours to hog out the inlet of the turbo housing to the max. When porting the walls of the housing, make sure you don't just bell-shape them by concetrating just on the inlet (top) of the housing, but try to keep the walls straight while going as deep as possible. Porting just the turbo housing without porting the exhaust manifold and O2 housing as well is just a half-assed job that won't do much good and create turbulance in the exhaust flow behind the unported collector of the exhaust manifold. Although enlarging the diameter of the wastegate outlet will increase its efficiency, it's the O2 housing wastegate dump that will significantly reduce the backpressure if opened up.

 

[TSi92]

Very well said but I have to disagree about the turbo oil return hose. I did disconnected mine from the oil pan (same reason it's a pain to connect it back to the turbo), I left it overnight like that and the next day I had a nice puddle of oil underneath the car. I was surprised because the oil return hole on the oil pan is in the highest place of the pan but for some reason oil leaked out of there. When porting the o2 housing try and port the wastegate port as much as possible. That should help with boost creep. When I ported my 14b we tried to port the wastegate but I still had some boost creep at the top end. But damn the car felt so much better and it showed at the track because I gained 4 mph.