Simple Question:

There are 5 "arms" going off of the metal vacuum splitter. 4 are for oil injectors. What is the other one for?

 

hmm..maybe i'm thinking of the wrong part-on a s4n/a,that piece is plastic,and the 5th one is the vacum supply.hooks up to the intake manifold,righ after the tb.[when i converted to a s5 intake i used one of the same size on the back of the manifold]
~d

 

on S5, there's a big 10mm line, and 5 lines that branch from it for the oil injectors. Dunno what the 5th line is for tho'

 

Bad move dude about using that metal nipple to the back of the s5 Intake. I know which one you are talking about. The velocity there will cause air bubbles In your Oil Injector Lines causing partial/full oil starvation to the Oil Injectors. Best to use the Main air Induct line.

Wozzom had the s5 Intake on his 86 and warned me about this particular line. He said this as a warning! However, I never undertook the project due to It being not worthwhile, IMO so I sould the whole setup. I'd PM Wozzom for further details.

 

I just did an S5 port job last night. I believe it leads to the intake manifold, a nipple right in between the two secondary oil injectors.
Not positive though...

 

Right, thanks man.

So, All I need from the metal assembly is the Oil Injector line(s) and the fuel hoses (I want to keep my high RPM startup, seeing as I did the TB mod)

 

Was I right? A group of three nipples all clustered together off the main line? one 'y', and then another nipple?

BTW... the saw bit sucks *** for porting.

 

I could've told you that.

I used medium-grit firecrackers to port mine.

6 nipples coming off that line. 4 are oil injectors, what are the other 2?

Here's my setup. No A/C, no P/S, no emissions, keeping the BAC (You can always use another idle control) alternative VDI & 5/6th port actuation. What vacuum lines do I need?

 

thanks for the info-i'll follow up on that.the location on the back was recomended in a write up-thats why i used it.i did check vacum with a gauge on the different nipples,and,at idle,they where virtualy the same.i guess the question that leaves me,is,where is it hooked up to on a s5 stock?if i remeber corectly,there is no other 10mm sized nipples on the intake manifold...in the meanwhile,i guess its a good thing i premixed as addional protection.
d

 

boy,i'm really puzzled now.i found the write up where it was recomended to use the source i'm using,and,a post with guess who claimming credit for the article.... wozzoom himself...
anyone else care to comment?

sorry to clutter up your thread,liquid

 

I probably am not reading this post right. But just in case......you do know that you are NOT looking for a source of VACUUM for the spider, don't you???? You are looking for a nipple on the back of the throttle body that DOES NOT supply a vacuum. You are looking FOR A NIPPLE THAT SUPPLIES NON VACUUM, FILTERED AIR FROM THE FRONT OF THE THROTTLE BODY. IT COMES FROM THAT APPROX QUARTER INCH HOLE ABOVE AND BETWEEN THE SECONDARY THROTTLE PLATES. THATS A POINT PRIOR TO ANY VACUUM BEING PULLED.

oops, seems the caps magically got locked in place for a period of time.

Also the metal nipple inbetween the two oil injectors is NOT LOOKING FOR A VACUUM. Its also looking for clean filtered air.

Its the oil injectors and the nipple for the fuel injector bleeds that are PULLING THE VACCUUM.

Gotta fix that caps key. Probably misread the post anyway.

 

hailers-as usual,you seem to have all the right answers.thanks for piping up[stick'n caps key and all..i'm a bit confused by the phrase abouve.i assume the nipple for the fuel injector bleed is the nipple right below the sec. injectors.i had a thread going a while back trying to figuere out what they are hooked up to,w/o any answers,so i just capped them off.when you say they are pulling the vacum,do you mean they are a vacum source for something,or they need to be hooked up to a source?i thought about them for some time,and could not come with any reason why they would require a vacum draw there[hence i capped them off].would love to find that out,and i guess i better go find the right nipple for that spider....is this a very important difference?if so,i know there is several write ups on the intake manifold swap,and none of them indicate a awareness of this...
thanks
david

 

Wozzom took credit for the write up. No doubt about that. Except he never made any follow up on that b'c his page went down for some reason or another. Like I said, you'd better PM him for more details on It If It still leaves you wondering. He knows his stuff.

 

The idea is to equalize the air pressure on both sides of the oil injector. If you did not do that, the intake stroke of the rotor would suck your oil pan dry in no time.

I first became aware of how the oil injectors worked by accident on my 87 n/a. I had asked on this forum on how and why of the vacuum on the nipples. I got a almost right answer from Keith. He came close but was off just a bit. With the engine running on a n/a, the *feed* line for the spider is right there on the front of the throttle body. With the engine running, I pulled it off. GEe. The vacuum was coming from the direction of the injectors, NOT from the throttle body.

I took the throttle body off and disassymbled it. I followed the passages by blowing smoke into the feed line. The smoke exits in only one place. That place is IN FRONT of the throttle butterflys. I.E. not a source of vacuum. Vacuum only exists aft of the throttle butterflys.

I also notice that on a n/a, the metal nipple just below the one for the oil injectors, was siamized (sp) with the one for the oil injectors. So both were not having a vacuum being pulled from the throttle body, but from the other direction. The metal nipple just below the one for the oil injectors, goes to the fuel injector air bleeds. That nipple is located directly inbetween the two oil injectors on the intake manifold, on a turboii. Like less than a quarter inch from the oil injectors. It feeds a path drilled in the intake manifold and from there to the center housing, leading to the plastic air bleeds for the fuel injectors. Pull the fuel injectors and you'll see a recessed groove and the inlet passage. Blow smoke to prove it.

Six Rotors combined with the theory of Keith, explained the need for equalizing the pressure on each side of the oil injectors, less your oil pan will go dry in short order. Well, sooner than if you had a working system.

I have no series five, so I can't tell you where the hose go on a series five. LEarned that lesson......talking about series five when I've never seen one.

OH. ABout the caps. The very first post I made was all in caps. The moderator told me that that indicated YELLING. I type in caps a lot because I'M LAZY. Also, above I was trying to emphasize the importance of connecting the oil injector hose to the right place. SAme with the air bleeds hose. Swap the air bleeds hose with the one for the solenoids vacuum source on a n/a, and you'll get one strange idle.

 

Yeah Hailers, that's why I put parenthesis around the word VACUUM in the title. They don't tend to make "anti-vacuum" hose. I was just being... laymen.

 

^BUMP^

6 nipples on this peice. 4 go to Injectors, where do the other 2 go?

 

I might be wrong here (I'm trying to remember from an old post), but I think the S5's have seperate air bleed lines to the primary and secondary injectors. That might be the other two nipples.

 

That's what I was ASSUMING but you know what assuming does. Guess I won't cut those 2 off then

 

sorry to go on here,but i figuered i should post my findings,in case any1 else that has done the swap comes across this.wozzoom pm'd me back,and basically sayd that if the spyder is hooket up to the fitting abouve,when the vdi kicks in,that area of the intake manifold gets pressurised[1.5-2.1psi,i think],which apparently is enough to cause air bubbles to form in the oil inj. lines.So,hook up the supply to the nipple hailers mentioned,or,to the stock location,wich apparently is T'd into the large vacum hose between the black intake tube and the bac.[good thing i have not hooked up the vdi yet..heh ]
~d

maybe somebody else can help out liquid anarchy now

 

Good thing you corrected It before you started.

 

Oh, I'm done and helped. I pretty much only neded re-affirmation.

As per the write-up. Someone needs to find it, and make the correction to the post. I doubt someone wanting to do that will stumble into this thread.

Just some constructive criticism

 

To sum things up. The 13B has 8 atmospheric pressure air bleeds. One for each fuel and each oil injector. Their primary function to the help atomize the fuel & oil spray.
Bill..