Post by
ILikeMy240sx »
https://forums.nicoclub.com/ilikemy240sx-u16757.html
Wed Jun 07, 2006 3:33 pm
Soo... I took my turbo+manifold+lines+o2 housing off yesterday.. Decided to mess around with the turbo while I'm stuck inside today. So here it is...
Ok now you can't just bolt on the T25 oil return flange. You have to widen the hole.
Like so...
Just match it up with the gasket of your new turbo to see how much more you have to grind...
Bolted on the turbo... good time to buy a new hose (5/8 heater hose fit perfect) I bought a foot to have plenty of length to play around with.
Taking the stud off the T25 compressor housing to transfer over to the T28 housing. Instead of using a vice grip... you can use two nuts. Tighten them to each other and use the bottom nut to twist out the stud.
Comparison of the two... I think it's quite obvious which one is the GT-RS
Notice how the two turbos are clocked differently... I am going to reclock the center housing of the GT-RS turbo to closely match the T25 turbo for easier installation. All you have to do is loosen all the bolts holding the center section and turn the center section while holding the compressor and turbine housing still. You do not have to take the bolts out... Just loosen them enough for you to clock the center section.
After reclocking the center section... GT-RS matches the position of the T25 center section.
Also, T-25 does not have a built in oil-regulator. You can see the shaft if you look straight into the oil feed.
Notice GT-RS you cannot just see the shaft down the oil feed. The orfice is blocked by some sort of brass material.
If you look closer, you will find a tiny hole on the side wall of that brass material. That is the built in oil-regulator.
Now, it is my understanding that Garrett only started doing this recently so just check your turbo to see if you have one. If not, you need a regulator if using SS lines.
Now, let's explore how well the stock T25 turbo lines fit on to this turbo.. Also we will see how much bending is required. I am going to use SS lines but I wanted to see how close they are to lining up.
The water feed line... It hits the larger compressor housing...
After a very little bending... Now that doesn't look too bad. I am not sure how close it is to the hole on the block but should line up pretty close from the way it looks.
Water outlet line... No bending done and it lines up pretty nicely.
Oil feed line... No bending and it seems to line up pretty well.
All the lines looked pretty good. I am sure they will require a bit more bending but nothing too major here...
One more shot of the oil drain. Lines up good. Only thing you have to do is widen the holes.
By the way... did I tell you how much I hate using these stupid "ratcheting" wrenches? AAAAAAAAAARRRRG they are so much frustration...
I thought Id take a panaromic shot of the room... pretty damn messy...
Stay tuned...More will come