chris_stampe

what does the 1/4 inch pipe fit onto, its above the tid in the middle of the green box.


Whats the vaccume/boost nipple that the green arrows pointing to on the intake manifold? Is it the outlet for the cruise cont., and boost sensor? Or is it for the bov? Also am I right about the brake booster (red) and does it need a check valve or something b/c i did an na to turboII swap. Thanks!


Sorry about the oversized pics...

Roy James

yes, you need a check valve on the brake booster vacume source line. You dont want your brake booster possibly getting pressurized, though i dont know what the problems of that might be. Im not too sure what you're asking on the other ones. Sorry

chris_stampe

Im asking just what lines are supposed to go onto those tubes. ie water oil vaccum

Where does the check valve mount and is it necessary to have before i start up the car and drive it mildly?

Can i buy a check valve from someone for cheap..im out of money after the conversion.

Thanks

Felix Wankel

The first one is a breather tube. It hooks to the TID.

LT1-10AE

In the first pic, in the green box, that line goes to the turbo for coolant. The hose will look like a "V" once it's on.

The second pic: You've got the brake booster right.

It's unclear from the photo, but:

If the nipple is on the lower half of the manifold at the very rear, it is to help the secondary injectors atomize/aerate the fuel. It goes to the upper intake manifold on the backside at the base of the throttle body.

If it is the hose that the green arrow is apparently pointing to, that goes to the throttle body to carry coolant to help warm it up.

If you live in a non-emissions state, you might as well pull the upper intake off and replace the vacuum lines and to a throttle body mod while you're at it.

chris_stampe

The hose that goes from underneath the tb to the engine is a coolant hose and i have that hooked up. This one i believe goes strait thru the lower intake manifold and is a press/vac line so your saying that hooks into the backside of the tb?? Also about how long would it take me to complete the tb mod. I was just going to get the swap running first and then start modding it later. But if its easy then what the hell. Thanks,
Chris

chris_stampe

As for the first pic, does it go to the tid for air or could it possibly go to this hole, i didnt know our turbos were water cooled. I think this hole goes for coolant in the lower intake. If the two dont hook up then where do they each go?
Chris

Felix Wankel

The one you have circled on the intake is the split air pipe to the main converter.

The other one does go to the TID, it is not a coolant line. The coolant line comes from the water pump housing, not the vacuum rack.

LT1-10AE

Ahh... I didn't look at the first photo close enough. That line does go to the TID. In the first photo, it appeared to be the nipple on the water pump housing - the shadows were hiding the hose.

In your third picture, as Felix says, that is for the split air pipe. Again, if you're in a non-emissions state and have no cats, that can be blocked off. Our turbos have both oil and water to cool and lubricate.

Here's an excellent writeup on the Throttle Body mod: http://fc3s-pro.com/TECH/HOWTO/TBM/tbm.html

With the Upper intake manifold off, look at the rear-most injector. There should be a vacuum line running between both injectors (Series 5 TII engines), and the rear injector will have a vacuum nipple pointing toward the firewall. That one goes to the firewall side of the throttle body - there are 3 or 4 vacuum nipples there depending on whether it is a J- or A- Spec engine.

chris_stampe

Ok the vaccum tube (acutally a nipple that doesnt go to anything right now) im wondering about is a direct vaccum to the lower intake manifold on the firewall side. There are 2 vac lines on the firewall side of the upper intk man. and 3 on the front side, those are already hooked up. Could this one be for the cruise or boost sensor? Thanks,
chris

LT1-10AE

That one needs vacuum/boost from behind the throttle plates in order for the injectors to atomize properly. I forgot that you've got the full vacuum spider under there. (I have a total of 3 vacuum lines on my car)

http://www.fc3s.org/89fsm.html <- check out the Fuel and Emission System section for a vacuum diagram for use with the stock vacuum spider. I don't remember where those go off hand. On a stripped setup like mine, you have the vacuum splitter for the oil injectors, one vacuum line in between the two inner injectors and the vacuum line at the back of the LIM that all go to the back side of the throttle body.

Good luck!

HAILERS

The oil injectors on a 87-88 turboii do not get a vacuum. Do not connect the spider to a source of vacuum. It should go to a source of filtered air, but not a vacuum. I have no idea what year engine that is in the pictures.

HAILERS

Couldn't help but notice that the three lines that go to your acv don't seem right. Looks like you have a hose going from the three pipes just above the acv, going to the nipple that sticks straight outwards. That nipple that sticks straight out, on a 87-88, is meant for the boost/pressure sensor.

Of those three pipes(the three welded together) on a 87-88, one goes to a nipple that sticks straight up on the acv, another to the bottom of the acv(the round part on the bottom of the acv) and the third to the nipple on the acv located towards the front/middle of the acv. Only one of those should have a vacuum on it. That would be the one that sticks straight up on top of the acv. The other two are pressure lines. The one in the middle/front gets air pressure from the air pump, delivers it to the other side of the engine to the Blue solenoid. The air comes out of the Blue solenoid and travels back around from the left side of the engine to end up at the very bottom of the acv where that round piece is with a nipple coming out.

The pipe on the acv that sticks straight up on the acv, gets the only vacuum. It gets it from the Grey solenoid on the other side of the engine.

chris_stampe

Im taking the acv off, I just ordered a blockoff plate for it. Im still not sure of what that nipple on the firewall side of the lower intk manifold goes to. It doesnt seem that it could be needed for the injectors to atomize fuel b/c it only goes into one port (primary on firewall side). there is a fourth vaccum outlet on the spider right where the 3 start to branch off to the acv, but its way smaller than the nipple. Anyone else?

HAILERS

Anyway you can take another picture of the nipple. I can't see exactly what your refering to.