So I recently ordered a new clutch set for my '88 Rx7 FC S4, Exedy brand OEM, due to it slipping in higher gears and giving it "above average" throttle on a flat surface. Jumps in RPMs and you can feel it trying to grab and eventually even out.
Exedy Clutch Set

Installed all the new parts that came with the kit and had to adjust the clutch pedal after getting it on the ground. Clutch releases at the top, but it wasn't slipping anymore. (At that time.)

Now down the road, it's doing the same thing. Now the idiot that I now admit I am, I didn't resurface the flywheel when I had the transmission out because it looked "good".
So I am in the market to buy a new flywheel for my car and I want to make sure I am getting the correct part(s) as I keep seeing in threads about you need to get a rear counterweight when you buy an after-market flywheel.

I've looked at these two parts from Mazdatrix and want to know if this is what I need, or if y'all have better suggestions on a normal budget.
MazdaTrix Flywheel
MazdaTrix Rear Counterweight

I trust this forums suggestions/input as y'all have kept my car running and strong. HELP A BROTHA OUT.

 

Your selections look good to me.

I had a lightweight steel flywheel and the improvement on acceleration at higher rpm was phenomenal. Was easy to drive on without a big difference in low end drivability.

I haven’t had a lightweight aluminum one so I can’t comment on it.

but as a rule of thumb, I always resurface the flywheel when I put in a new clutch. It’s only ~$40.

 

Yes, you can use any lightweight flywheel that you want as long as you have the correct counterweight (and all counterweights are dependent on the rotating assembly of your engine). Looks like you selected the correct counterweight.

FWIW, the lightweight steel flywheels are cheaper and you'll have more of a OEM+ feel. It slots in between weight of an aluminum and stock, so you won't notice much of a difference in drivability, but the engine will be much more livelier in the revs. I run a steel and I love it, haven't driven an aluminum flywheel but many are happy with them as well. Totally up to your preference!

 

Yeah... kinda learned my lesson from this one. Battling with getting the transmission on was a damn nightmare without a lift.

Oh good! Then I'll make sure at the least, get that counterweight. And yeah I noticed that in price, wasn't sure what made the cost difference in that, but since two people have spoken highly of the steel flywheel, might look into that instead of the aluminum. (As you see, that part is PRICEY.)

 

Any suggestions on some steel flywheels from online vendors?

 

I ran the racing beat lightweight steel flywheel on my turbo 2.

your n/a should take part number 11437. And get a matching s4 counterweight, part number 11463 (or any other brand even the stock s4 automatic counterweight will work. Whatever is cheapest).

 

overrated pointless mod for all but dedicated race cars. get a used OEM flywheel and resurface it. lightweight flywheel just makes the car a pain to drive.

 

Know of any good webpage vendors selling one?

Also would I still need to get a counterweight for that?

 

I'm running the steel Racing Beat one. I like it and don't feel it hurt drivability much at all. Probably most noticeable negative is taking off on a steep hill takes a little more finesse. Throttle changes while cruising are more noticeable, Just from my experience. I probably wouldn't get the aluminum one on a street car.

 

I would disagree. A lightweight steel flywheel is probably one of the best value mods you can do to a NA car that really makes the car feel alive and much more rev happy. Low rpm drivability is virtually the same and the flywheels aren't THAT expensive relative to other mods. Any other power mod is expensive and pointless unless you get a proper standalone and any of those mods will cost you more than a steel flywheel + counterweight.

 

May seem useless unless you have something to benchmark it against. My buddy had a ‘06 sti and we would constantly mod one thing on each car at a time and do some highway pulls to see how it affected each car.

After installing the RB steel lightweight flywheel, the revs picked up faster higher in the rpm range. Drivability was maintained as stock.

I always say the best “speed” mods are those which don’t put extra stress on the engine (stressors such as higher boost, raising afr’s, etc.). I always tell people the definite best first mod is to replace their sway bars for these exact reasons, but that’s another story.

Commenting on Argh’s post, why do people run lightweight wheels? Reducing rotating mass increases acceleration.

Ill stay subscribed to this thread. I’m curious to see how you like it.

 

I like my light steel flywheel. It feels racey and special without being annoying to drive.