Kenteth

So I got a set of block offs from kr2d. Installing the ACV went pretty easy. Have some plumbing to do with it later though. I"ve got some downtime with the car because the shipping company apparently 'misplaced' the crate. Anyways, So.. I haven't run a cat since back when I first bought the car 3 years ago. I just crimped shut the split air line that went to the cat. The kr2d set came with a split air block off and i was planning on installing it.

But...

1) The invoice from kr2d actually says 86-88, I'm kinda worried I got S4 block offs, but it did say 13B. Furthermore the ACV was correct, so I thought it may be a misprint on the invoice.

2) Where does the split air block off go? I assumed it was either on the block or the LIM, but I can't find a port anywhere that matches the shape. Even where the cat air tube did go, I don't see where the block off would go.

jimmyv13

http://www.teamfc3s.org/main/factory...tems_turbo.pdf

page 43, #5 is the split air pipe. It's kind of a crappy picture, but it gives you an idea of where it goes.

Scott 89t2

just follow the split air pipe to the engine. it's held on by 2 nuts. that is where the plate goes.

Kenteth

Maybe I'm an idiot.. there is one of these on an n/a correct? Anybody have the page # from the n/a sect?

^^

NZConvertible

If you block off the ACV, you don't actually need to block off where the split air pipe attached to the manifold. It's passage went straight to the ACV.

asherwood

I'm pretty sure we are talking about the same thing , when you say split air tube, you are referring to the air supply tube that goes from the LIM to the Cat, right?

If so the connection on the LIM is a tube, not a port flange like...say the exhaust port, but rather like the connection on the top of the radiator. The original hose fit over it and was clamped in place.

Sounds like the block-off plate you have is for a turbo.

Kenteth

conflicting information.
1) says split air block off goes to the ACV
2) says its not a port flange.

So even though either way, I'm in the clear with the situation, I will, for the hell of it check the ACV.

Kenteth

Ok, well for what its worth, I don't see any port on the ACV that would match up to the small block off plate. No worries I guess.

NZConvertible

Since nobody's looked at the ACV schematic in the FSM, I'll clarify.

The split air pipe bolts to the manifold, but its passage within the manifold goes straight to the ACV. It doesn't go into the manifold runners or anywhere else, so there's no need to block it off.

Kenteth

ahh tricky... so if you we'rent to block off the acv, you would have to block off the split air

Kenteth

ahh tricky... so if you we'rent to block off the acv, you would have to block off the split air

I think they ran it through the intake just to confuse matters

NZConvertible

No, your engine wouldn't run due to the friggin' great hole in the side of the manifold straight into the primary runners...

Kenteth

lol ok well to say than that you were to keep the acv but not block it off, better?

asherwood

Again, that's because on a N/A it is a hose flange postioned on the rear (nearest the firewall) of the ACV. This is where the small length of hose attaches the ACV to the split air pipe that goes to the cat...

At about 1500-2500 rpm air is pushed to the cat to help burn off any unburnt exhaust gases.

HAILERS

Ah. There's a free download of the Factory Service Manual online. It's got graphics and words and stuff. P.S be sure to keep all the things that you remove stored away somewhere.