Hey All,

I just put another clutch in my MY04 S2K and thought I would share some info for others. I searched and searched and had trouble finding the exact weights so we put both the AP1 Flywheel and AP2 Flywheel on a scale.

AP1 = almost 15lbs.
AP2 = just over 21lbs

difference is almost 7lbs. The rest of the set up is OEM parts (Pressure Plate, Disk, Throw-Out and Pilot Bearings)

I have not broken the new clutch in yet so I dont have much of a review, I will update the thread once I fully break it in. In the short time I have driven the car the best comparison would be if you took a none R B-Series motor and put a Type-R Flywheel in it. The revs drop faster than with the heavier clutch and rev up faster too.

I went this route because the other options were just too light (Fidanza, Toda, and etc.) all around the 8-9lb. range. I think for the AP2 this is a better set up than an ultra-light Flywheel because you get some of the benifits and drawbacks of the lighter Flywheels, but with less drastic results.

As for the Fly wheels themselves they appear to be the same parts (different part numbers) with the AP2 just having a lot more material around the center and the AP1 looks more like a lightened version. as for as price is concerned the AP1 is also cheaper than the heavier AP2 Flywheel.
More reveiws to come after the break in process...

 

AP1 flywheel, a very good choice

 

I used the Scale at power Honda (it may be off a little ) I am very excited about it

 

Still quite heavy but good for daily driver. You want to be able to keep some momentum.

Competition Clutch makes a ultra light weight flywheel.

I had one in my 2000 Civic SI and it only weighed like 8lbs (or was it 6) I forget exactly. It was super light.

Lots of holes in it allowed the engine to spin up super quick and dropped revs super quick.

 

I've had the ACT HD street clutch and AP1 flywheel for the past month. Probably one of my favorite mods so far (next to removing the CDV)

 

I have the Fidenza light flywheel with an ACT organic clutch and fat pressure plate, flywheel at 11 lbs, sucks on hills, traffic, etc... seems to rev faster, maybe just a placibo.

 

My flywheel is heavier than the one your running but I do notice the difference with the revs, also rev matching requires just a touch of the throttle instead of really kicking the pedal like before.

 

The one thing I hated about trading my 03 in for an 06 was the flywheel change. I miss how fast the AP1 would rev up. Although, the AP2 flywheel makes for easy shifting because you stay up in the rpms longer, revving up faster was more fun.

 

Forgive my ignorance, but why did Honda increase the flywheel weight between AP1 - AP2? Does the increased displacement and torque have anything to do with it or were they just trying to make it a little less "edgy"

 

Good to know John. Once my clutch goes out, I was going to go the toda flywheel route but this sounds like a cheaper/street friendly alternative.

Just keep us updated on how you like it