Started pulling apart my project car today, it's an 88 NA with the airpump removed & ACV blocked off. First problem, my LIM isn't the same as other NA's I've seen or the FSM, there's nothing for the aux ports. Is the LIM off a T11 since they were 4 port?



2nd question, the big hose goes to the BAC, where does the small one go? It's the pipe between the throttle body & AFM.

 

Lol, yeah looks like a 4-port manifold. Some genius slapped that on..take it off and check if the 6-port sleeves are still in the motor. Sounds like the previous owner is a retard.

 

No, it's a 6-port. You're in the UK? You guys over there didn't get the actuators. Or at least some of them didn't. I'm not sure why or what years but it's still a 6 port LIM. Cause the N/A UIM doesn't bolt to thre t2 LIM.

 

Yep I'm in the UK & it's a UK car, so the aux ports are always open?

thanks guys.

 

If you feel like selling it and shipping to the states, I want!
It'd work out good for a turbo 6-port setup.


Pretty much. i've never seen a UK block with no intake but i assume it's always "open".

 

Not planning on selling it yet but I'll let you know if I do. Any idea on the small hose or is that another UK only thing?

thanks.

 

My guess is something emission related. I don't see anything on the FSM diagram for it. Be sure to plug it or hook it up or else you'll have a nice vacuum leak.

 

Was going to plug it if I can't find where it should go. Thanks for the help.

 

Bunch of ignorant responses here. Its a Euro version. Your 6 port valves should be located on the top of the lower inatke real close to the irons/side plates, they are butterfly valves rather then rotary type valves that us U.S. Spec guys are used to.

~MIke............

 

I'm gonna need to see some pics of those..

 

The auctuator is circled in blue, the butterfly rod that comes out the manifold in red.

~Mike............

 

I kinda like this system better than the rotary sleeve valve, seems like it might flow a little better.

 

Here, stole this from another thread. You can clearly see the butterfly valve in this pic for the aux ports.

~Mike............

 

Would a US-Spec s4 na UIM bolt up to this Euro-spec LIM?

Oh and are the Irons any different than US ones?

 

I don't know about the U.S. upper and Euro lower bolt paterns. The Euro spec side housings are different indeed. The AUX ports aren't bored/machined like the U.S. spec because theres no rotary sleeve/valve. The port also doesn't dead end like the U.S. ones, but they have a more conventional ramp at the end/port shape simular to what the Pineapples sleeves imulate.

~Mike..............

 

I just found this thread after getting confused myself. I'm in the UK with a UK s4 n/a and found these butterfly valves. Mine were seized anyway as I now find (just bought the car as a project so not driven it myself yet, it was cruised up the motorway to get to me now I've started stripping it).

It looks like the ports are both smooth internally, I can't see far enough down into the 5th and 6th ports but the ones below are nice and smooth into the chamber and the top ones seem to go further into the block where my torch and my eye can't both be at the same time lol.

Removing these is going to be the plan as the port is tiny and the butterfly takes up about 30% of the cross sectional area even when fully open. I know I'll lose a little low-end but thanks to the port in the block not needing a sleeve I hope it won't be as big a loss as you US guys get.

The actuators are on the top of the LIM with a very short rod onto a shaft to the butterfly. The vacuum hoses for the actuators seem to go up on top of the block, I can't tell where from exactly as I ripped off the rats nest and UIM already but I don't think they received any signal from the exhaust, especially since my exhaust hasn't got a cat from what I can tell, it just has this massive balloon manifold/header with an air pump inlet on the front end, maybe that's a cat itself I don't fricking know but I'm going to make my own header or buy a RB one anyway.

If anybody is curious I can take more pictures, and I suggest you guys look on www.mazdarotaryclub.com and www.ebay.co.uk if you are interested in getting a euro spec engine.