YakATK

Alrighty, I know what your all thinking.....why am I doing S5-->S4 conversion. Well the reason being that my NA is currently blown, and I can get a really good deal on a full S4 Turbo engine complete with full drivetrain and any parts I want other then the body pretty much. So, what I am wondering is what other parts besides the Engine (fully dressed), drivetrain, fuel pump, ECU/Wiring Harness that I will need? Is there anything? Or do I just have to get all that stuff....plus any sensors or anything? Litterally I can get anything I want from the car except the body, he even said I can take the suspension and **** if I want, and seats and whatnot, well...you get the idea. So....what parts will I be needing from this car to accomplish this swap? Thanks for any help/advice you can give.

PS, the swap will only happen if compression comes up fine which he is testing today. And yes it is a REALLY good deal cause it is cheap cheap cheap to get it all.

YakATK

Bump.

Anyone know? Someone must have an idea of what sensors and stuff I will need.....I wanna tell him what I need so as to get everything that I need exactly and not miss something and I do not know what all the sensors are called that will be required for the swap.

hypntyz7

Every wire, sensor, and electronic device from the s4 must be used. You'll effectively be making your car an s4 with an s5 body. Note that you can not retain your sliding seatbelts (or did canadian models have those?) or any other s5 specific functions. So long as you have both cars side by side, it is do-able, and should take about a week. Have fun with that one.

Again, do not try to mix any parts between series and you'll be fine. Even though things may look like theyre the same, and may even plug in, several pinouts were changed on all kinds of things.

$150FC

I don't think anyone's sobbing over the removal of automagic seatbelts.

YakATK

Alright, well I won't have the car at my house or anything. It is at a place and the guy said he will sell everything to me except the body, and then he is gonna ship it to me, or he said he might be able to deliver, I only got to talk with him for like 20 minutes so don't have all the details yet. I will tell him just to strip the engine bay clean and send it all over to me.

Also, I will still need to use the S5 fuel pump will I not? Cannot use a S4 pump in a S5 tank from what I know. I will be getting the Walbro pump for the S5 car, will it still work with the S4 engine using the S4 ECU and stuff? Or will I encounter problems with that? Should I make it easier and get a S4 gas tank installed?

Are there any other little things that I am missing?

And one more question. If I am using the S5 Walbro pump, and move the stock IC to be a FMIC, I will also have a cone filter intake and will put heat shield around it, would I be safe in upping the boost a little bit? Like up to 10psi or maybe 11? Just curious.

Thanks for the help.

hypntyz7

That is a hard way to do it. What if the stripper forgets one part? You're stuck with downtime. What if he breaks a part. See what Im getting at? It can work, its just not nearly so good if theyre not in the same place at the same time.

Im not sure you understood. You need every wire in the CAR, not just the engine bay, to make this work. This means pulling the dash, and that BIG *** 6" diameter wiring harness that runs behind the dash, back to the taillights, and out into the engine bay. You need the small wiring harness that wil remain in the dash, as well as the one for the engine itself. You need the clutch slave, tranny, driveshaft, starter, rearend, halfshafts, engine, airflow meter, hood, fan, radiator, shroud, and several small electronic pieces from the strut tower. You need the brake booster line and check vavle as well.

Use the *bracket* for the pump for the s5, whcih is the tank you're keeping. Either pump will mount to either bracket...one bracket is longer than the other. IF you get a walbro etc., it will mount to either as well.

YakATK

Ok, well the guy that is doing the stripping knows what he is doing for sure....he works a place that builds race cars out of RX-7s and stuff. So not totally worried about him forgetting something or not knowing how to get it all out properly or any of that stuff. Needing all that stuff like the drivetrain and clutch and all that is already taken care of cause it is totally complete, the guy said I can take EVERYTHING except the body of the car so I will just tell him what I need. I could probably just tell him what project is happening and he would know exactly what to send me anyways.

What is the need for all the wiring to be replaced under the dash? What are the main differences?

Also, the swap is probably not going to be done by me, probably going to be done by a professional. Or if it was done by me it would be me and a couple friends doing it. And I am not too worried about downtime, hell...my car has been off the road for so long now already, a few weeks extra waiting for a part won't hurt.

Thank you for the info, really helpful. I will give the guy a list of everything I need for and see. Again this is all assuming his boss allows him to sell it to me and the engine has good compression.

hypntyz7

s4 and s5 wiring have different plug shapes and different pinouts. Remember that the engine harness plugs into the ecu, but the ecu must also plug into the car harness (behind the dash). Since s4 and s5 plugs differ, you cant run an s5 harness in an s4 car, regardless of which ecu you try to use. It all must match series.

YakATK

Alright that makes sense.

Just curious, for a proffesional to do this swap, how long do you figure it would take? 2 days? 3 days? Just curious as to what my installation costs are going to be.

OR, if me and some friends were to do this swap, is it the sort of stuff that is very challenging, or just time consuming? We are all pretty good at working on cars and mechanically inclined. Is the Electrical work really tricky or anything? (I must admit I suck at electrical) Either way I think a professional install is best.

hypntyz7

Well, it depends on the "professional". IF it is just some mechanic, then it'll take him almost as long as it might take you. I would allot a full work week for the job, unless you take it to a 7 specialist. I, working alone in my small shop, could accomplish the swap in about 2-3 days if I tried, but then there isnt an area of a 2gen that I havent been into before, this cannot be said of 99% of "professionals" out there.

This type of remove/reinstall will run about $1500 minimum. I would recommend you do it yourself. Everything is plug and play, provided you do in fact have all the parts. Dont think of it as some kind of engine/wiring swap, think of it as a body swap, because thats essentially what it is.

dr0x

This is how to do the swap, step by step according to a haynes.

1) Park car in driveway
2) Place on jack stands
3) Uninstall car (See picture 3.1) leaving accessories in driveway
4) Install in reverse of removal

RX7_ZRO

Isn't that how haynes says to do everything?

YakATK

Alright cool. Well the guy I was planning on getting to do it (if he has time) is the wicked with 7's and is the local guru so to speak. I guess if installation is that much I will just do it all myself, or most of it and maybe leave the electrical for him if we cannot figure it out. I am still looking into the engine and everything though, I REALLY wanna do this swap cause I will pretty much be getting a S4 TII for like 2k-2500 Canadian, and engine only has around 170,000km on it I think. Will see what happens, thanks for all the replies.

Later.