I'm in the process of swapping my s5 (auto) to an s4 TII drivetrain. I've already acquired the major bolt-ons (tranny, shaft, diff, flywheel, and cv's) I've swapped 2 240s to manual before. So if I'm not mistaken, it should all be pretty straight forward. But what I'm worried about is whether or not I should be swapping counterweights when installing the s4 turbo flywheel to an automatic s5 motor. Should I reuse the hardware from the s5 automatic flywheel onto the s4 flywheel???

By the way I'm new to the site.

 

You need the Rear counterweight that corresponds to the ENGINE If you are going to run a Light Aftermarket flywheel.
so s5 engine,S5 rear counterweight and Light Flywheel..s4,S4 rear counterweight and Light flywheel.
Stock TII Flywheels can go on a N/A engine but you have to use the TII tran,starter,slave..etc.
That is another story..(drivetrain swap)
OH!..stock Manual flywheels have the counterweight IN the flywheel as part of the Unit itself,so you do not need a separate counterweight if you use a stock flywheel.

 

Nice, thanks for the info Styx. Would I be able to reuse the auto s5 flywheel nut on the turbo s4 flywheel?

 

STOCK flywheel, I should say.

 

The NUT actually holds the Flywheel onto the Eccentric shaft( Manual car.)Pretty sure it holds the Counterweight on an Auto or light flywheel and then the Flex plate or the light flywheel is attached to the Counterweight.(6 bolts)
YES,you can Re-use it, if the thing is not beat up and the threads are ok..You can use some Lock-Tite if you prefer.
Get the SPECS on Torquing that thing down.
NOTE: do not forget the "KEY-WAY".without that your whole assembly will just spin!

 

Thanks! I'll go at it on saturday

 

please torque that thing properly, My buddy watched an rx7 flywheel at DCTC zip off and fly off into the farm field next to the school. It traveled a looooong ways. They take a stupid amount of torque.

I just picked up a beefy torque wrench for this job, but I am swapping a s4 N/A drive train to s5 TII lol.

 

I read up on a thread earlier about torquing. Aaroncake said that if you dont have a torque wrench that goes up to spec (280-350 ft lb), just torque it to 150 ft lb, and turn the nut 60* more with an impact, resulting in about 330 ft lb. I just picked up a 54mm socket and 32mm for the axle nuts today, and I'm gonna start tomorrow.

Scary coincidence. I live in bloomington too, and I'm also doing a t2 swap on a NA Fc.

 

What part of bloomington do you live?

 

over by the mall, however I just bought a town house on west side by the baseball fields. Hoping this weather clears up a bit today to mount my s5 wing, and roof wing !

 

Sumter town house? I work 1 block from that baseball field.

 

I smell a BBQ and Beer Festival..lol!..at..
where you live again???..(J/K!)
.............
Never mind..I just google mapped Bloomington..cab fare home would be a killer!

 

if you know where scoops ice creme shop is, it is behind there. Putting coilovers on this weekend hopefully, Just came in yesterday. But I noticed I need to replace some mounts/bushing in the rear, its moving around a bit.

Yes! beer, bbq and rotaries!

Shoot me a PM, meet up some time when I get settled in, also if you see a red s4 zipping around town with rust on drivers quarter, thats me

 

yeah I know where thats at. Do you go to the sonic meets?

 

I have been to them a few times, Didn't like the crowd the first few times. idk, I will go a few more times when it starts up again. there is a few rx7 guys that go that I need to talk to about spare parts LOL

 

Im having a VERY hard time finding an S5 clutch pedal assembly... When I find one they want an arm for it. I'm not sure if s4 and s5 pedals are interchangeable.

 

Im dropping my car for swapping this sat hopefully everything turns out well!!

 

s4 clutch pedal assembly will work from what I understand, you have to change over to the S5 TII clutch slave and clutch master, pedal assembly should not matter, I am keeping my s4 unit intact.

I will have s4 NA trans, clutch, flywheel, driveshaft, diff, and axels available at somepoint this summer when I swap out to the s5 TII. I am staying NA this year but want LSD so I can get to the track and start sliding around better.

fun note for a beautiful friday in MN, was HOONING IT UP in abandoned parking lots by my work for a bit this morning!! woooo fc is a fun car

EDIT: you already have an S5, excuse me for not paying attention. either assembly will work for you. I am not sure you need the TII slave/master if you already have an S5.

 

how much $$$ would the swap cost?

 

Well if you buy all the pieces individually on ebay, then it would be VERY expensive. Around $1400-$2000 for the full swap... I got almost a full T2 S4 setup for less than 800. From a local user of this forum.