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How to fit a R33 J-Pipe To Neo ?

rahilp

By rahilp,
in Engines & Forced Induction

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rahilp Contributor

rahilp

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Hi there so my R34 currently has an atmos blow off valve, the last owner had sorta cut the flange off and welded a ring for his new one making it an effort to fix up and the plumb back hose was taken out completely and blocked.

I'm wanting to take it back to a factory plumb back style.

I had bought a R33 one thinking they were the same as an R34  as it was labeled as RB25 at the wreckers, but after getting home and putting them side to side I notice the neo one has a little pipe nipple for the boost sensor near the end and the R33 J pipe doesnt have any at all

So I bought a j pipe, BOV and the r33 plumb back hose

And looking at nissan parts drawing I see that a neo doesnt have a nipple on the plumb back hose (looks like it to me) where as the r33 does

I was wondering if there was a way to fix this issue.

My idea is bit weird as I was thinking of taking the line from the boost sensor to the r33 plumb back hose fitting with the nipple that's doing nothing atm. But was wondering if that will affect the reading as it so close to the start of air intake where as usually you would have it right at the end.

 

I know getting an r34 one would be ideal but there isnt any in my area atm been looking for weeks, the bov that I'm running currently does seem to make car run pretty lean as the engine is mainly stock and dont see anything else causing an issue with fuel consumption.

 

Will be adding picture soon hopefully tonight or early morning

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GTSBoy Grand Master

GTSBoy

Posted
Posted (edited)

Um. What about the traction control throttle, motor and position sensor? Stock ECU won't be amused without it. Making a connection for the boost sensor is a triviality by comparison. Drill and tap a hole and put in a nipple. But "mostly stock" and your description of the shit that has been done to the car are somewhat worrying.

Your photo came up as I was typing.

That is not a nipple. That is a piece of line that runs under the crossover pipe. You can see the other end of it on the front side, next to the mounting bracket. It's the passthrough for vacuum to the charcoal canister.

Edited by GTSBoy
rahilp Contributor

rahilp

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  • Author
Posted (edited)
3 hours ago, GTSBoy said:

Um. What about the traction control throttle, motor and position sensor? Stock ECU won't be amused without it. Making a connection for the boost sensor is a triviality by comparison. Drill and tap a hole and put in a nipple. But "mostly stock" and your description of the shit that has been done to the car are somewhat worrying.

Your photo came up as I was typing.

That is not a nipple. That is a piece of line that runs under the crossover pipe. You can see the other end of it on the front side, next to the mounting bracket. It's the passthrough for vacuum to the charcoal canister.

Sorry my pic is bit shit the engine is still hot, my little nipple has definitely been tapped in to the j pipe then, it does not look factory at all and I dont have the charcoal canister line going back into the intake manifold in my setup the last guy has done some weird shit

 

 

Sorry you also talk about traction control etc, how is that affected with only that j pipe, im literally only changing that pipe, all those parts arent connected to them  are they

20200518_202201.jpg

Edited by rahilp
rahilp Contributor

rahilp

Posted
  • Author
Posted
3 hours ago, GTSBoy said:

Um. What about the traction control throttle, motor and position sensor? Stock ECU won't be amused without it. Making a connection for the boost sensor is a triviality by comparison. Drill and tap a hole and put in a nipple. But "mostly stock" and your description of the shit that has been done to the car are somewhat worrying.

Your photo came up as I was typing.

That is not a nipple. That is a piece of line that runs under the crossover pipe. You can see the other end of it on the front side, next to the mounting bracket. It's the passthrough for vacuum to the charcoal canister.

Sorry my pic is bit shit the engine is still hot, my little nipple has definitely been tapped in to the j pipe then, it does not look factory at all and I dont have the charcoal canister line going back into the intake manifold in my setup the last guy has done some weird shit

20200518_211354.jpg

20200518_211523.jpg

GTSBoy Grand Master

GTSBoy

Posted
Posted

I think you miss the points I made.

1. The "nipple" you circled in the pick of the R34 crossover pipe is not a nipple. It is what I said it is.

2. The R34 ECU (or actually, the R34 ABS/TCS CU) requires to see a present and fit and healthy traction control throttle body, upstream of the main throttle. Without it, the ABS/TCS CU goes into a tizzy, and as the ECU is with the same union, when one goes out on strike, they all go out on strike. You will have fault codes in the ECU that will not go away because of the removed TCS equipment, unless you are using a Stagea motor/ECU.

rahilp Contributor

rahilp

Posted
  • Author
Posted (edited)
30 minutes ago, GTSBoy said:

I think you miss the points I made.

1. The "nipple" you circled in the pick of the R34 crossover pipe is not a nipple. It is what I said it is.

2. The R34 ECU (or actually, the R34 ABS/TCS CU) requires to see a present and fit and healthy traction control throttle body, upstream of the main throttle. Without it, the ABS/TCS CU goes into a tizzy, and as the ECU is with the same union, when one goes out on strike, they all go out on strike. You will have fault codes in the ECU that will not go away because of the removed TCS equipment, unless you are using a Stagea motor/ECU.

1. That 1st picture i posted found yeah its not a nipple my mistake but the recent 2 pictures ive attached shows that the boost sensor hose going to the fitting its not a line running underneath its 100% has had a fitting tapped into the pipe. The 1st picture of the 2 recent ones show what i said it is. The fitting is in the dead bang centre of the pipe

2. Im sorry im probably missing the plot but how does changing the jpipe to another factory oem one and putting and oem bov and using the original factory lines affect those things, like the jpipe looks identical except for that fitting thats been tapped in 

From my understanding isnt the TCS the part circled in red which im not touching anyways, and that is staying on the throttle body and the blue circle is the j pipe the part i am replacingr34-gtt-rb25det-engine.png.0c239a06e8e529fd0a80f6e79eeeee92.png93934364_2577696365786273_5958927167948587008_o.thumb.jpg.181ca751bac8a2088cb120325b4fb271.jpg

Edited by rahilp
GTSBoy Grand Master

GTSBoy

Posted
Posted

THE R33 CROSSOVER PIPE IS LITERALLY MUCH LONGER THAN THE R34 ONE BECAUSE THE R33 ONE DOES NOT HAVE THAT TCS THROTTLEBODY!

What you are putting onto the car CANNOT be an R33 crossover pipe.

Just look at some pictures of the engine bays!

And it literally does not matter that one of your crossover pipes has a nipple tapped into it and the other one doesn't. Just connect the boost sensor to where it is supposed to be connected.

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