Oil pump and lines

[tylerearl88]

I have an 08 nytro and I am in the process of making a turbo kit. I was wonder who makes a scavenger pump to return the oil from the turbo and wether or not an electric fuel pump works. I was also wondering where to tap into to get the oil supply for the turbo and where to tap in to return the oil from the turbo. I would also like to know the same thing for the coolant supply for the turbo.

P.s. Do you need a restrictor in the oil line before the turbo?
Is a boost controller needed? (I am using a mitsubishi 16t turbo and want to run around 10 lbs of boost. I am also doing a head shim and valve timing.)

 

[Ski-Dooin' it]

Alright.. Ill start with what I know, then onto what I think I know.

I know a bunch of folks on the 2 stroke turbo's run the little facet low pressure fuel pumps as scavenging pumps, they seem to hold up fine for the actual amount of time the sled is used, and they are cheap as well. As for oil, I Think the nytro's might be similar to the apex's theres an oil pressure sending unit for a gauge, you just T in front of that and run it to the motor. You will most likely need a restrictor, you will lose some pressure due to the distance, but on my setup, I run a 125 main jet of an rx1, works great on my 16g turbo, so same style journal bearing setup. As for the return, again, nytro is different then the rx1, but There is a little plastic plug on the mag side that you can check the timing throught, just throw a barb fitting out of it and dump it back in there.

As for coolant, I ran mine in and out of the carb heater, and into a line on the coolant system, but mines a custom deal in a doo chassis...

as far as boost controler, My 16g came with a 10# wastegate on it, so I bet thats what yours is, I doubt its lower, but if it is, then you need a mbc... if its higher, gotta find a different wastegate arm setup to do.

 

[tylerearl88]

Thanks for the info. Guys at mcx say that I should use a t at the oil pressure sensor like you said. But they said not to restrict the oil going to the turbo. Does anyone with an nytro know where to take an return the coolant for the turbo from? And does anyone know for sure wether a low pressure Fuel pump is fine as a scavenger pump? Thanks.

 

[mbarryracing]

To begin with, your turbo likely doesn't require a scavenge pump since it's got pressurized journal type bearings, unlike the ball bearings that need zero back pressure so as to not leak oil past the seals...

Also MCX doesn't use coolant lines, why do you feel you need to? You can't get the hose routing low enough in a sled to allow an adaquate thermal syphoning effect after shutdown (what it's intended for) so the water lines aren't doing anything for you anyhow.

 

[tylerearl88]

Thanks. I am building my own kit and did not know running coolant to the Coolant ports of the turbo wasn't needed. It would be awesome I I don't have to use a scavenger pump but why does mcx use one in there kit then?

 

[TBird]

MCX oilpump is an s.c. "return oilpump", the oil from the turbo needs to be pumped back.

 

[tylerearl88]

So can I use a low pressure fuel pump as an oil return pump? Also why doesn't mcx use the coolant passages in there turbo's?

 

[TBird]

I talked to them and they choosed an mecanical for it's reliability, and because they had issues with electrical pumps.
And why they doesen't connect coolant i can only guess, and my guess is that it isn't necessary .
Why do something if it isn't needed?

 

[madsledder]

Coolant lines not needed for rear mount. Powderlites uses a pulse pump for return , ask them i think there only like $80.00 . And ya a banjo fitting in the inspection bolt on the stator cover will work for return. But be sure to keep a down hill and straight line to return also pump close to the engine.

 

[tylerearl88]

I guesse I won't be using the the coolant part of the turbo then. I am thinking about running one of the pulse pumps from powder lites. I just hope they are reliable enough. Does anyone know wether it matters if i deliver oil to the drain side of the turbo and drain it from the delivery side?

 

[Ski-Dooin' it]

I know on my 16 G the outlet side is substantially larger as far as diameter, so I would go the proper way as you will get appropriate flow to it. If yours is the same, go for it. Just make sure the inlet/outlet options is clocked properly so they are almost vertical or you WILL get some smoking and oil consumption, mine was a tunnel dump, so I didnt notice it, but when I tore it down, the exhaust side definately had some oil residue in it.

 

[rxrider]

Rear mount or front mount?

On a rear mount a return oil pump is a must, on a front mount you don't need a pump because the oil returning from the turbo will gravity feed back to the engine.

You will NOT need a restrictor for the oil feed line going to the turbo running Mitsubishi turbos, it runs journal bearings and are not prone to blow oil by the turbo. On a ball bearing turbo like the Garrett's you would need a restrictor the size of 0.80-0.85mm restrictor.

You can run a Hallman Pro RX MBC, it works great and is holding boost very well.

You need to get an oil filter adapter for the oil feed line.

If you run it in a front mount configuration route the coolant line from the oil cooler to the turbo and return it back. The fuel rail heating is not enough flow to make a difference. If you run it in the back where it is cooled by snow and air blowing around it you will NOT need to run coolant thru it.