S5 turbo on an S4 tII Engine....
 

Click on it....I need help..














As the title says, I need to know what has to be done to make an S5 Turbo work on an S4 TII engine....I have searched this site for the past two hours...I have come up with nothing...I was told there was a thread on here as to what modifications have to be made to make it work.....The turbo went in my TII vert' and it is getting warm around here so I gotta have her ready for warm days of topless cruising...Any help would be greatly appreciated...

You need a manifold for the S5 turbo, a stock S5 TII manifold will work or a custom one. I think you can even make the S4 waste gate actuator work on an S5 turbo with minor modification (like bending the rod is all).

You must have the corresponding year or oil lines (feed and drain) also, and the manifolds won't work. I do belive the water lines are fine tho? (can be slightly bent if needed)

for s4 to s5 turbo you need: s5 exhaust mani, both oil lines and of course the turbo itself including wastegate(7.5 psi). if you get the whole s5 turbo assy it easily swaps right in, no fuss.

If you're going to try and hack a s5 onto a s4, its going to be a pain, time consuming and costly, not to mention worthless.

Use quotes when you search, as the f'ing search now ignores too common of words.

I searched "s4 to s5 turbo"

https://www.rx7club.com/search.php?searchid=8404318

Good luck, might want to look at getting a hybrid s4 turbo... google bnr hybrids

You just need the S5 turbocharger and exhaust manifold. The S4 oil and coolant lines will be reused, including the drain line. If you try to use an S5 oil drain line, it won't mate to the S4 front cover properly. This is the exact setup I have on my car.

Here's a pic of it bolted onto my S4 engine during the build:
https://www.rx7club.com/picture.php?...&pictureid=521

I later added the S4 heat shields around the turbine housing. The inner one fits fine, but the outer one has to be cut down. The S4 exhaust manifold heat shield won't fit due to obvious shape differences.

Sorry.

Shit, I was all wrong, again. :facepalm: The S4 oil and coolant lines.

here's a pic of s5 turbo that was on my s4...

Attachment 721974

what is the difference in s4 and s5 turbo's? I know the wastegate is a little better. Are they more efficient? Thanks

The wastegate is much better (5x more area), and connects to both halves of the exhaust path. They also use a divided manifold rather than the twin scroll system to increase exhaust gas velocity at low RPMs.

I would never use an S4 turbo after going with my S5. I wish I would have done it sooner.

is there any number on it to tell the difference between s4 and s5, or any main visual differences?

The turbine housings and manifolds are very different. The S4 has an actuator for the twin-scroll, and the turbine runners are different sizes. S5s have no twin scroll actuator, have fully divided exhaust manifolds & the runners are of equal size.

Are you able to just slap it on and go completely stock S4 turbo trim?

1. S5 exhaust manifold
2. S5 turbo
3. all oil/coolant lines are exactly the same, almost 100% positive. all coolant lines are banjo fittings. All oil lines are flange fittings.

DP gasket you need is here http://www.mazdatrix.com/getprice.as...m=13-4910-N370

Oil inlet gasket here http://www.mazdatrix.com/getprice.as...m=14-2760-N386

Oil outlet gasket you need is here, 2 needed http://www.mazdatrix.com/getprice.as...m=14-2930-N385

Gasket needed for coolant inlet from LIM found here http://www.mazdatrix.com/getprice.as...m=13-5350-N386

Gasket for exhaust manifold to turbo here http://www.mazdatrix.com/getprice.as...m=13-710A-N370

Gasket for exhaust manifold to engine found here http://www.mazdatrix.com/getprice.as...m=13-4610-N386

bolt that thing up and get a fuel cut defender (AKA FCD)

Stop spreading misinformation! The above posts covered exactly what the OP wanted. For one the S4/S5 turbos are exactly the same. It is only the manifolds that are different. For two the oil lines between S4/S5 ARE different and need to remain S4 if swapping an S5 turbo onto an S4 motor. If you don't know what you are talking about... Don't post!

I meant the lines he needs for the swap are already presently on the motor because he has a S4 TII block.

i believe i know what im talking about as i myself have done this swap.

lemme be a lot more exact for the above member, keep all oil/coolant lines from your s4.

Every line except for the oil outlet pipe at the bottom of the turbo on the S5 is different, but only where it bolts to the front cover.

P.S. calm down bro i didn't give false/wrong info just wasn't completely clear in my post.

since there is so much talk about the oil/coolant lines, is there a place to get replacement lines?

Short of making your own -AN lines, only the OEM hardlines will work.

^^true i thought about doin that too, but its just too much trouble. The stock lines are easy plus you already have em.

Thanks guys...I am currently torn between 3 FC projects and a D50 that I am doing a 4G63T engine swap..... I just got the turbo last week so I am gonna slap it on asap...I need my Vert' for the spring/summer!!!

i'm porting my s4 waste gate right now, and i have a feeling that it's not going be enough to stop creep, but i'm giving it a shot because it's practically free. so this is something i've been looking into for quite sometime now.. but anyway why not just go with a bnr hybrid? -it's probably the best quality, and it can leave lots of room down the road for future improvements. i can't even find any s5 turbo's for sale let alone a just the exhaust housing by itself.

An S5 turbo (or S4 turbo with S5 turbine housing & manifold) is a much better starting point for a hyrbid turbo anyway.

The car in question I want to keep relatively stock....The engine, that is....The Vert' will be a weekend cruiser so I am not going to do to many modifications to the car...I really like it the way it is, but since the turbo took a dump I wanted to upgrade since I have been hearing nothing but good things about the s5 turbo....On my other turbo project, that is a different story...I am still shopping for turbo's and an engine.....Undecided between 20B or just throwing in another 13BT.....

Are there any modifications to the vacuum lines/rats nest or is it all basically "plug-and-play" with the oil/water lines from the original s4 block?

I have tried this but the exhaust side gets to hot and transfers that heat through the fitting a melted out the lining in the steal braided line and it would leak.

Just about every custom turbo setup out there uses custom braided lines, so something isn't right. Either the lines you used wer not rated for high heat, or the routing took it way too close to the turbine housing. Heat shields or heat wrap would surely help as well.

It is not a routing issue. The exhaust heats up the AN fitting that replaced the banjo bolt and the the inner lining in the hose melts where it is connected to the AN fitting. I would like to know what hoses they use, the highest temp hose I can find that is 350 degrees, and that was pretty pricey stuff.

So if any one has done this to the FC please let me know where you got the hose.