s4 to s5 intake write up?
 

Whos got it? I found it here but it leads to a dead link...post link please.

non turbo right?

S5 N/A UIM/TB on S4 LIM

http://howto.globalvicinity.com/gv_w...i=63&co=1&vi=1
http://howto.globalvicinity.com/gv_w...i=45&co=1&vi=1
http://howto.globalvicinity.com/gv_w...i=44&co=1&vi=1
http://howto.globalvicinity.com/gv_w...i=47&co=1&vi=1

The pics are lost, but this has all the info.

hah u beat me to it .. i had the links saved in my favorites. even with out the photos its a god write up. I used it when i did my intake swap

Thanks boys.

There's this one too, and it still has the pictures: http://homepage.mac.com/carldavis/intake.html

Got um all again thanks boys RotaryRocket that was the one I really wanted, I'm gonna follow that one this summer.

Are you planning on keeping emissions? If so, I have a hybrid S4/S5 vacuum diagram I made up when I did the intake swap on my S4 engine.

Well I live in Ontario, Canada and my car is considered a classic (87) and its emissions exempt now. I think I'm gonna use the s4 LIM and just remove the EGR which you have to. But I could definitely use your diagram please post it.

Can the s4 6-pt actuators be actuated by the ACV dump hose like it says in the guide you posted? Or can only s5 be actuated by that. I'm gonna run the egr solenoid from the acv as the source to actuate the VDI and i'm gonna RPM switch the solenoid.

+1 here for the diagram i want to do this but i need emissions ..... if you think you got it ruff come to portugal :blush:

Both S4 & S5 actuators work off of pressure, so either would be fine. One is pull type (S4) and the other is push type (S5), but the result is the same. I take it you're planning on re-drilling the back hole on the S5 UIM to mate to the S4 LIM? That was the way I went with it.

You could tap into the ACV dump path for pressure to run through an EGR solenoid, or you can tap an NPT nipple into the back of the air pump itself. If you leave the relief solenoid hooked up, it will open the ACV dump at about 3500 RPM, which will cause a big pressure drop. I put a restriction in the air silencer tube to keep the pressure high enough.

I'll post some pictures and the vacuum routing diagram tonight after I get home.

I can't remember who said it but someone just removed that stud because the rest apparently all match up. Well it'll be a learning experience thats for sure.

If you just remove the stud, there's a very good chance of causing a large vacuum leak at the rear runner. I just filed a slot into the casting (which is fairly thick), then drilled a new hole right next to the old one. An S4 UIM/LIM gasket makes a nice template. Here's the vac diagram and some of my pictures. #2 shows the modified S5 UIM. #3 shows the ground down rear iron, my EGR block-off & a temporary sheet metal bracket for the UIM. The last 2 pictures are actually from that write up above that no longer has images. I saved them off before they disappeared. That setup is with the emissions rack removed.



https://www.rx7club.com/attachment.p...1&d=1270096206

How did you get the hole like that? Everywhere I'm reading is saying you will have to make a cave. From what I can see the wall is too thin there to do what you did. You sir are magical.

It is somewhat of a cave. I ground into the wall from the base to about half an inch up, then rounded it off. If you try to grind too far up, you'll go right through. Attaching a nut to the stud that went through that hole was a pain, and I had to use a nut that did not have a shoulder to it. You won't be able to get a ratchet on it, but a short wrench can still get it.