Blue smoke after boost

[SilvrEclipse]

ok, well I talked to a someone today about this and he said that the turbo might be getting to much oil. The oil pressure is to high. I have a 4-an line T-ed off of my oil pressure sending unit. After the motor is warm my ideal pressure is 20psi and driving its around 60psi. Is this to much for the turbo and blowing oil by the seals? Its sounds like a possibility, I haven't found any retrictors for this turbo but something could be made very easily.

[Mikelb]

holy shit... that is extremely high... where's your turbo plumbed in at???

When I start my car, the pressure shoots up to a/b 40-60 psi, and I don't drive it til it drops back down... My turbo sees no more than 25psi (normally no more than 20 psi, flooring the gas)...

Mine is plumbed in from the heads...

edit: when idling, my pressure can sit around 10 psi...

[SilvrEclipse]

Its tapped in where the factory oil pressure sending unit was. I took that out, put in a T fitting with my autometer sending unit and oil feed line. So I guess thats the problem

[Mikelb]

ah, yeah that down there has a lot higher pressure... The oil pressure gauge needs all that pressure to function right, but the turbo needs a restrictor or something to cut-down on that pressure... on the 1G's, they are tapped into the head, on the side of them... I'll see if I can get a pic...

[SilvrEclipse]

yea, I have no other place to tap the line. So here is my solution, I have a flat piece of metal. I'm going to cut it round so that it fits between the oil feed hole and the banjo bolt. And drill a very small hole in the center for the oil. Sound good???

[Mikelb]

Originally Posted by SilvrEclipse

yea, I have no other place to tap the line. So here is my solution, I have a flat piece of metal. I'm going to cut it round so that it fits between the oil feed hole and the banjo bolt. And drill a very small hole in the center for the oil. Sound good???

it's worth a shot... let me know what happens...

[SilvrEclipse]

Well im gonna try it, i just dont know what size to drill out the hole, any ideas. And I wont know how much pressure the turbo will be seeing, still wont be as much as it is now. Thanks for all your help guys

[Mikelb]

I'm really not the guy to ask that... but start as small as possible, and work your way up...

maybe this can help: http://www.dsmtuners.com/forums/showthread.php?t=171317

[SilvrEclipse]

I saw that, I figured out a way to rig up a nitrous jet on my set up, but I think this will work better if I can get the right size hole. Im workin on it now so I will let you know how it works.

[Mikelb]

take the measurements from that nitrous jet... or get a small bearing/washer, that you could find some way of inserting it in the plumbing somewhere...

I have a feeling it's gonna be something that's easy to do, but a PITA to figure out at first...

[Mikelb]

Here's a pic of where mine is plumbed (ignore how crappy it looks, I am still putting the car back together)

and sry for pic quality... it was too bright outside and that was a camera phone

[SilvrEclipse]

I have never seen anyone tap there oil line there on the 420a motor. I have finished my restrictor. Its a little piece of metal that fit inside the turbo, i put a spring in there also so that the plate would stay down. I heated up the metal and used a needle to make the hole. Its about 1/2 the size of the one in the turbo. How will I know if I'm not getting enough oil?

[Mikelb]

sry, I forgot we were talking a/b a 420A... that's the stock location for a 1G-4g63...

Ok, from what I've read, no more than 15 psi at idle, I'd say anywhere from 5-12(15 on the high side) and you'd be good...


I have viewed a few peoples' sites, and they all seem to suggest a fitting with a .04, .06, or a .08 diameter hole... I'd play around with those... see what you get...

As far as high boost oil pressure, I'm not certain what it should be, but I wouldn't figure anything over say 25-30?!?

[SilvrEclipse]

Well all I have is a pin hole for the oil to go through so it should be a little better. I took the return off and let the oil drain into a container and it seemed like it was still getting plenty, a constant flow. Im just going to drive it like this and see if its any better. Well I guess this is a gamble. If it doesn't get enough oil the turbo is gonna be fu*ked.

[gthompson97]

Why don't you ask them on 2gnt.com? I know there are a bunch of turbo guys over there and they would know alot more about it than some of us. Where did GSgoinfast tap his into?