20g install details

[GSLENK]

I grabbed a 20g and I'm a total noob to upgrading turbos. From what I have searched so far, this is all I know: (my 20g is the tdo5 exhaust housing, with the big 16g style compressor housing)
-20g is bolt-on (well except for the following...)
-I should feed Oil from the OFH
-I should use a restrictor around .08" hole to maintain proper pressure
-I need to clock it to point down (the compressor outlet) (it doesn't point down...)
-I have all the intercooler piping and stuff needed to install it.
-I need all new gaskets to replace any ones i am separating.

What I an pretty unsure about:
-Use stock oil drain?
-What size fittings for all oil drain/feed, what size line, Diameter (i know better than to ask for length)? SS flex tubing right?
-Coolant lines bolt right up? If not... What sizes again for fittings, and lines?

This should be pretty easy for those you who have done successfully... And my searches haven't yielded me specific enough answers to be confident I'm not about to screw something up.

Is there anything else Im missing? I want to get this turbo on and running in a day. Preferably in a few hours.

 

[GSLENK]

Im so jealous of those mostly rubber water lines (1gs are hard all the way around...)

So with bending/tweaking I got all the lines to line up. now the oil drain doesnt line up. I find that really really weird since these both have the same turbine housing and middle section as a 14b right? or should the drain not line up?

Either way, I cut the drain and I'm going to rubber hose extend it until I find a proper drain kit.

Also, my o2 housing puts the o2 sensor really close to the manifold. I think its gonna melt something (the wires on the o2) would heat reflecting wrap work to protect the 02 wires?

Or should I o2 bung the dp?

 

[Jaxness]

That wastegate actuator will definitely not allow a draw-thru fan to be run on that side....it may even be close to the rad.

I prefer to use Garrett or Holset actuators on 20G's because they have smaller heads for better clearance. I also try to fab the bracket so it's up a little higher than yours, placing the actuator tighter to the turbo and allowing better clearance.

I'm running dual 12" slimfans. The wga just happened to fit RIGHT between both fans and isnt touching anything.

When I originally got the turbo, it didn't have the correct compressor housing that I ordered with it. So I had to have the correct one (pictured) shipped. When it got here, it didnt have the same holes on the front to mount the wga, so I had to shorten the rod, fab up a bracket, and make do with what I had.

 

[JusMX141]

Gotcha.

The bracket on the Frank L5 shown above was also a custom-fab job...that turbo uses the same cover as your 20G.

 

[Jaxness]

Gotcha.

The bracket on the Frank L5 shown above was also a custom-fab job...that turbo uses the same cover as your 20G.

I see that. I like the wga/rod going to that wga ALOT better than the one that was sent to me. If I wasnt eventually going with an external wastegate, that would be something I would look into setting up just to make my current set up a little more comfortable looking, .

 

[JusMX141]

That was done for a customer who was strongly opposed (at the time) to going with an external gate. The Holset actuator was used to help hold the flapper shut better under high boost situations. Took a couple tries to get it right....the first design was similar but too weak and the bracket itself would bend under load- couldn't make over 17psi. The last design with the bend on the bottom of the bracket for strength allowed 25psi to be made with ease.

Internal gates can be just as effective at controlling boost as an external if the stars align. Boost pressure, flapper size, the amount of airflow the turbo generates, and of course the actuator's spring pressure all play a huge role in whether an internal gate will work for you or not.

 

[lowboost13]

Mine was a direct bolt on. didnt have any issues. I decided to cut a 1g return line and run a hose between the two ends for a little extra flexibility during install, so I didnt run into the same problem Jax had. I used an o2 pipe plumbed for a 38mm wastegate from I believe ExtremePSI and fed from the head. IC pipe fit very well with my VRspeed FMIC. I did however, have to dent the water pipe slightly since I was using an ebay manifold which I have never had any problems with.

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What brand exhaust wrap is that?

 

[GSLENK]

Its all installed. no leaks or drips so far. I have to put some heat shield on the o2 wire but thats all. I had to extend the oil drain with some heater tubing by about 1 cm.
i hope that lasts...

 

[92AWDHX40]

Not bad looking good.

 

[crash89]

What brand exhaust wrap is that?

Which ever brand is sold at a local Kragen/O'reilys.. Like 10 bucks I think, and about an hour or so to do the wrapping. Comes in a 50' by 1'' thing. Dont forget to get metal "zip ties"

 

[lowboost13]

Where did you use the metal zipties?

 

[Jon91TSi]

Where did you use the metal zipties?

Everywhere you start or stop the wrapping, sometimes in between on items like downpipes incase something would catch it to keep it from unravelling.