Nytro engine knocking..

[Dimebag]

Is it possible that bearing deposits may have found its way into the turbo, or is the oil filtered before it gets there?

Should I worry about this, or am i safe?

 

[canoehead]

oil in turbo?

Good question. I presume that your turbine is fed from engine oil and not self contained. If you want to remove any doubt of filings, drain and flush the turbine and lines also. One would think that the oil provided is from the filtered side of the gallery but when you're nutz deep you might as well drain flush fill. IMHO. Good luck bro!

 

[Dimebag]

Yes, its fed with engine oil. I will make sure to flush all lines before i attempt to start her up again.

I have a skilled mechanic on my "team" so it shouldnt be a big problem to get her running again. I just want to do as much research as possible. Im trying to understand, but it gets quite advanced in there compared to the two strokes i have worked on earlier.

Thanks for the heads up

 

[Dimebag]

Any thoughts on getting JE 9.5:1 pistons for it? While still keeping rods stock?
They are actually cheaper than oem. Since the JE kit includes piston pins, rings and circlips.

What do you think? Pros/cons?
What do i need for the extra fuel delivery needed for higher boost levels? Injectors/ fuel pump?
How much boost is it safe to run at this compression ratio?

 

[sorenson1610]

Any thoughts on getting JE 9.5:1 pistons for it? While still keeping rods stock?
They are actually cheaper than oem. Since the JE kit includes piston pins, rings and circlips.

What do you think? Pros/cons?
What do i need for the extra fuel delivery needed for higher boost levels? Injectors/ fuel pump?
How much boost is it safe to run at this compression ratio?

I think if your going that route, you might as well build it up while apart. You'll be happier in the long run and its already apart. Just don't go crazy with it since you want to do it cheaper. Then you know what's in it and what it's capable of. That's the only plus when stuff like this happens to me.........time to build it up

 

[Dimebag]

My plan was to stay with the 180 setup on this sled, and fix it up with oem internals. We are still talking like 2500 bucks + 25% import tax for that job.

Thats with one new rod, new crank, new oem pistons, new valve spring, cam chain tensioner, oil pump and oil cooler.

I want to turbo the xtx too one day, and maybe I'll get a badder setup for that one. Time will show. I really enjoy the rideability of the 180 kit.

That beiing said, I dont have much seat time on bigger turbo setups, so Im not that qualified to talk about pros/cons of the different setups. However, I do know that I love the response of the 180 kit, and that I would like to keep my main sled somehow like that.

 

[sorenson1610]

I guess what I'm saying is just going with stronger internals, not more boost or more HP.

 

[Dimebag]

I understand.

But I cant see how it would work with for example JE pistons with 9.5:1 comp ratio without increasing turbo pressure. And increasing boost means I need bigger jets/ fuel pump / new ecu and so on. All this is stuff that makes it even more expensive.

Or do you mean I should upgrade the internals while its opened up. And that I should run lets say 2 psi more,
just to make up for the compression loss i get with the low comp pistons?

 

[sorenson1610]

I understand.

But I cant see how it would work with for example JE pistons with 9.5:1 comp ratio without increasing turbo pressure. And increasing boost means I need bigger jets/ fuel pump / new ecu and so on. All this is stuff that makes it even more expensive.

Or do you mean I should upgrade the internals while its opened up. And that I should run lets say 2 psi more,
just to make up for the compression loss i get with the low comp pistons?

Upgrade internals while apart. Run the 2 more psi to compensate for the pistons. Then you'll have the bottom end that will take more boost down the road if you want to go that way. I'm not sure if it will work but I'm sure it should or be able too. Is that possible with your turbo system without all the other add ons?

 

[Dimebag]

As long as I dont increase overall engine compression I cant see any reason why that should not work.
I have a manual boost controller, so increasing boost should be no problem.

I have decided to stay oem internals. I cant afford upgrading it more at the moment.
Im in the process of finishing my new garage, and this repair comes as a huge bummer in my budget.

Either way, Im gonna turbo my other Nytro later in time. Then we can talk carillo / je parts.

 

[Tarzan]

There is a filter in the oil tank that also must be (rengjort) .

 

[Dimebag]

How do you get access to that filter?

 

[HYFLYR]

Its your oil pickup on the bottom of the tank. There is two allen head bolts holding it in, undo these and pull it out and clean it.

 

[Dimebag]

Thanks.

While waiting for the parts to arrive, i got the stocker in the garage today too. My riding buddy also came by and dropped off his Nytro in there. So were talking 3 Nytros, and one Raptor in one garage. Thats what i call a Yamaha modshop.

 

[Dimebag]

On the rod identification mark the old ones says "6F", while the new rod says "6G".

The manual states that the number 6 is to be used for calculating bearing size. What is the letters for?