65mm Throttlebody installation question

[wonderllama]

Hi,

 

First off, I am not that mechanically inclined when it comes to cars. But that's part of the reason I purchased a Zcar, to learn. I did do a search, and while this is a popular topic, I don't think there is too many threads asking my specific particular question.

 

So, I'm going to install the 60mm throttle body I bought from a member here a couple of weeks ago. This is my first mod to the completely stock L28 in my 78 280Z. First off, I need a larger diameter hose to run from the AFM to the throttle body, where or what should I use to make this? Secondly, there is what I think is the PCV valve hose coming off that stock hose, do I need to make something to re-use this? or do most people just remove it all together?

 

And lastly, being a California car, it is equipped with a BCDD, I don't see anyway to reinstall that, so I'm going to toss it, right? (good riddance)

 

Most importantly, if I do just end up removing some of this junk, do I need to cap off any of the holes, or what?

 

Thanks for any and all help.

[naviathan]

Hi,

 

So, I'm going to install the 60mm throttle body I bought from a member here a couple of weeks ago. This is my first mod to the completely stock L28 in my 78 280Z. First off, I need a larger diameter hose to run from the AFM to the throttle body, where or what should I use to make this?

Same stuff they use for cold air intakes and intercooler piping. Mandrel bent pipe and rubber sleeves. Check out some of the ricer performance shops around town or eBay and you'll find it.

Secondly, there is what I think is the PCV valve hose coming off that stock hose, do I need to make something to re-use this? or do most people just remove it all together?

Personally, I would make a fitting to connect it to and some of the IC/CAI piping already has a bung for it. Several people on here have just stuck a filter on the end of the tube coming out of the valve cover. It is part of the pcv system, but it's not the pcv valve. That's under the intake. Because of the way the pcv system works in these cars, I would make the connection at the intake and hook it up right rather than risk a build up of noxious/acidic gasses in my crankcase.

And lastly, being a California car, it is equipped with a BCDD, I don't see anyway to reinstall that, so I'm going to toss it, right? (good riddance)

Most importantly, if I do just end up removing some of this junk, do I need to cap off any of the holes, or what?

 

Thanks for any and all help.

Cap it or put a filter on it.

[wonderllama]

Same stuff they use for cold air intakes and intercooler piping. Mandrel bent pipe and rubber sleeves. Check out some of the ricer performance shops around town or eBay and you'll find it.

Personally, I would make a fitting to connect it to and some of the IC/CAI piping already has a bung for it. Several people on here have just stuck a filter on the end of the tube coming out of the valve cover. It is part of the pcv system, but it's not the pcv valve. That's under the intake. Because of the way the pcv system works in these cars, I would make the connection at the intake and hook it up right rather than risk a build up of noxious/acidic gasses in my crankcase.

And lastly, being a California car, it is equipped with a BCDD, I don't see anyway to reinstall that, so I'm going to toss it, right? (good riddance)

 

Cap it or put a filter on it.

 

Thanks for the help. I've noticed that several people here have bypassed the AFM and added a CAI. Does that mean that the AFM is not needed as well? Or were these all 240Z that I was looking at? I'm really trying to straighten up my engine compartment, and I'd love to throw away that AFM if I don't need it.

 

It'd make it easier to install the TB too. I could just sleeve the J-pipe (or whatever that is) of the CAI over the TB intake.

 

EDIT: There is a plug at the bottom of the AFM that made me think I could not live without it.

[Challenger]

First off you"ll need the afm if your staying with stock computer as far as I know, and second I was going to put on the 60mm Tb and get "+15hp" but once I thought about it really wouldnt improve hp because your still going through the same ports and runners. When I first read about this swap I was really excited but it seemed to good to be true. Also the more I looked into it a saw that you have to make all sorts of adjustments to the intake manifold, etc. Anyways good luck.

[X64v]

The AFM is required with the stock fuel injection. The cars without them are running Megasquirt, SDS, or similar.