88rota

iTrader: (18)

I having troubles trying to get the s5 na swap to function right with my s4 body,computer and harness.
I guess the main problem would be the vdi and 5th & 6th ports.
Ive been reading around at every link and site possible but im still unsure of how this is suppost to be hooked up right.

do i run a vaccum hose from the air pump itself to opperate BOTH vdi & 6th ports?
from what i have been seeing that is what their saying.

so in order to operate the vdi, I would need to run off the air pumps back hose with a rpm switch?
and do i do the same with the 5th & 6th ports as well?

Im a little confused....
I had people point me in directions of links and websites but is there anyone who has done a s5 swap into a s4? if so please help guide me through on how to operate all this properley.
thanks.

Sgtbaker

iTrader: (2)

I'm trying to swap the s5 uim onto my s4 block and am running into the same issues. Most of the guides no longer have pictures and I'm more of a visual person. So if anyone has the guide saved on their computer post the file up here so we can dl it.

https://www.rx7club.com/2nd-gen-archive-72/how-diy-rpm-switch-6th-ports-vdi-233381/
http://howto.globalvicinity.com/gv_w...i=46&co=1&vi=1

these two are the most helpful but again I'm not too confident without pictures

88rota

iTrader: (18)

kind of having the same issues, theres nothing that so pictures or that is detailed about how they run the vdi and 6th ports.

jjcobm

iTrader: (18)

i will lead you to water: http://www.rotaryresurrection.com/2ndgen/techmenu.html

88rota

iTrader: (18)

Ive looked in that....
I need someone that has done it before that can explain more on it.

88rota

iTrader: (18)

ok ive read them all and i still dont understand how to actually run the vaccum lines off the air pump to the vdi and the 5th & 6th ports.

Does it all run off the rear hose off the air pump, do you just plug it into the rear hose and t-off from there?
I know i can use a rmp switch to open the vaccum switch which allows the air to flow to the vdi actuator.

now would i also need to run a rpm switch for the 5th & 6th ports to a vaccum switch or can i run off the air pump without a switch and pull staight off the air pump directly to the 5th & 6th ports?

Im confussed....

btw im running a s5 engine and s5 intake with a s4 tb and wire harness.

duno1818

I was turned on to this site but i have yet to gather all the parts http://homepage.mac.com/carldavis/intake.html and also found this one https://www.rx7club.com/2nd-generation-specific-1986-1992-17/activating-aux-ports-vdi-rpm-switches-907824/

RotaryRocket88

iTrader: (7)

Same way I did it when I had an S4 NA with an S5 intake manifold. 2 RPM switches, 2 emissions solenoids, and a modified stock air pump.

Activating Aux. ports and VDI with RPM switches: https://www.rx7club.com/showthread.php?t=907824.

point-blank

iTrader: (9)

I will put up pics tomorrow, I just made a working system a couple days ago

88rota

iTrader: (18)

Honestly how well does that setup work?

88rota

iTrader: (18)

Would also like to see your setup.
Have you used it yet?
If so how well does it honestly work?
just asking btw.I've never used or done this.

RotaryRocket88

iTrader: (7)

Perfectly. It's exactly how it was designed to work on S5 NAs.

point-blank

iTrader: (9)

it's on the car now I used a design from another forum member with some modification, unfortunately i can't think of his name right now to give credit.

It works pretty well actually I have alot more top end than running on 4 ports and no noticeable drop in power in low rpm, the only issue I can see at this point is the sound the valve makes (loud air leak or super chargery )

This is a pic of the back of the airpump I used some 3/4" line, a 3/4" steel pipe union (threaded on both ends) and a 3/4" pvc cap. I drilled the end of the pvc cap and threaded in a 1/2"-3/8" hose fitting (the barbed ones) then ran a 3/8" line to the next component



This is where the 3/8" line from the airpump goes to (ziptied to the charcoal canister) it is just a 1/2" Female "T" fitting. On the right side we have another 1/2"-3/8" barb fitting, on the bottom a 1/2"-1/4" barb fitting (with 1/4" vac line running to the actuators) and on the top we have a 1/2"-1/2" union (threaded on both sides it's under the zip tie) and finally the valve





It's is a pretty simple design, the valve is used to adjust the airflow from the airpump to get the actuators to open at the correct time, and that is about it.

I will look for the original thread I used this idea from and post a link.

-Miles


Edit: just realized you did an s4 to s5 swap, not vice versa so I am not really sure about the vdi, this will make your 5/6 ports open though haha

Edit again: here is the link to the thread I got the idea from https://www.rx7club.com/showthread.p...ort+activation

88rota

iTrader: (18)

i think im going with the rpm switch.

point-blank

iTrader: (9)

hahaha right on dude, you should update on how it works

Sgtbaker

iTrader: (2)

I have no emissions (so no air pump) what would be the best solution for me to run my VDI and aux ports (currently have a s4 manifold on and the Previous owner took out the sleeves and jbwelded the actuator ports)

88rota

iTrader: (18)

hey could i use this port on the acv inlet that is feed from the air pump?