Suba Performance

W Here we have the Aero, Billet crankshaft, the ZRP and the original Subaru Nitroid crankshaft that are all crankshaft for an EJ257 with 79mm stroke. But you can also use it in an EJ20 or EJ22 engine for a stroker engine. So let'start with the original Subaru crankshaft. T It is not a Billet one, it is a normal cast crankshaft. But we have with t I will show you, but not the older ones, the other ones are not cross drilled and they are not nitrate that are heat treated. You see here the colors, that's because it is heat treated. It is good, but not so good The surface is not so hard. But we have also a difference to the normal heat treated crankshaft. These crankshaft here is cross drilled. The oil flow comes from through the case, in the crankshaft and from the crankshaft t Or a channel. So that is the job for the big end bearing and cylinder one. Here it is the same But then the oil flow here is a drilled hole and here that means here is the channel. And we have the oil flow for cylinder two, big end bearing and cylinder three come only from one bearing. So when you have any troubles here or there is a little bit too much silicone and the flow is bad you have pretty early problems with the big end bearing and then you have a knocking noise and then okay And the same as here at the last bearing here, it is So that is the original crankshaft one. The older ones where it was not cross drilled The weight of take a look here. 9. 3 kilograms. So next one. The material of the ZHP is a 4330. It is also a billet crankshaft It is a mixture from t Yes, the ZHP crankshaft is also a pretty good crankshaft. It is Plasman Nitrate II. Here you see the holes for the counterweights that reduce the complete weight of the crankshaft. But I will show you the difference between the oil channel design from here, from the Aero to the ZHP. It is not drilled We have here only one oil channel and the main difference is that that means that the oil flow is pretty straight. The that is also okay, but not so good. That makes the build of the crankshaft much easier. The last bearing here is for cylinder 4. You see here when you put it in, you see it there. That means that these one crankshafts are pretty nearly the same from the construction and from the style you build it or you drill it. I like it that this here with this small, I don't know the name, help me if Why? The weight of the ZHP is 8. 2 kg. That means it is 1. 1 kg lighter. One special t It is a special treat. You see it. I don't know why they do that, but I t Last time I needed a new one. I don't know why they do it, but it is so. Let's go to the next one, the Aero one. Aero have They said it is made in Great Britain. The ZHP is made in C Also in the Yes, the crankshaft. At the first look it looks nearly the same. You said, okay, crankshaft is crankshaft, but it isn't so. The main difference is the oil channel design. You see here is a hole. Let'start on the cylinder, big and bearing one. T You see it there? Yes, you can see it. That means here is a complete oil channel. And that means that these two bearings are for the oil channel flow for the big and bearing on cylinder one. That's pretty good, because when you hear a problem or hear there is a little bit less pressure. It is also much safer If you have only one bearing, it brings pressure to the big and bearing one. So, yes. Then you see here, this hole, it goes through this, here, And. . . Can you see it? Yeah. That means here is a complete channel And the main bearing two, three and four, send the oil pressure two, one, two, three and four. That means you have very constantly oil pressure on the big and bearings or in the complete crankshaft. That is pretty good for against any trouble with oil pressure or bearing problems or something So, but that's not the end. Here you see a hole again. That's the same Here is the oil channel. And that's worked The same. So, that means everyt And I see that the surface of this here feels a little bit I don't know why it is so Maybe it is casted completely and then only CNC mac But it feels nearly the same And t And I t But when I see how that costs so much money. Here, let's check the weight. Yes, it is the same And another difference is here. You have here two places for a cutter. That means when you install it on and when you have two ones, it is not so stressed. Yes, I think that's why they do it In the past we have served some problems with And here you see the arrow crankshaft comes with a certificate And there are all diameters and weight and position measuring and with the final inspection, of course with the best measurement equipment you can buy with a to-yo. And here's a balance doc And the ZRP comes with t It's also good. I have never in the past problems with ZRP crankshaft and the price is the difference. You can buy three ZRP crankshaft. So that means I don't want to say that everybody has to buy an arrow crankshaft for 4000u20ac. But there are differences. I really Because for the price somet And we check the balance often in the past and we have never any problems when they come new from factory. Either they are bad balance or something So the price is top and good for 500u20ac horsepower. If you want more maybe a ZRP one. If you want to buy a So I hope that video was a little bit informative for you. I hope you enjoy it and Ciao!