I know this question has been asked a million times, however unlike most of you guys in here I'm not looking to push nearly as much HP as you. Currently looking at Action Clutch 2KS, Competition Clutch Stage 3, and last an Exedy Stage 1 or 2. I'm only looking to put down 240whp or so on a Greddy boosted B16 (00' civic Si). I drive the car everyday, and want something more so on the streetable side. Flywheel weights, I hear mixed reviews about sub 10lbs vs 10+lbs aftermarket flywheels on a boosted car whats the difference?

 

act heavy duty street disc will be good for ur goals.

 

i have been a little sketchy on act stuff, i had a cm stage 4 on my old setup, and i have a friend that has about 300whp on a gsr with a cm stage 3 and flywheel combo.

it isnt the whp you need to look at it is the tq.

 

competition stage 3 sprung.

 

ACT HDSS ( heavy duty pressure plate and sprung street disc ) would be more than you need but is also the lightest pedal clutch they have. i have had that exact clutch in both of my last two integras and can take a absolute beating no problem. both lasted over 4 years of daily hard abuse.

i know act wasnt one of your options but IMO its the best


oh and as for flywheel i think under 10 lbs is prob too light. i no expert on that but the point of a flywheel is to be heavy to do many things: like dampen shock from clutch engagement, going up hills, rough spots in road basically its heavy for a reason if something jars the driveline/engine it has a large rotating mass to keep everything moving instead of slowing the engine rapidly, but that also translates into more mass to get moving when you hit the gas. if you are gonna launch at the track light weight will make it more likely to bog if you hook from the hole but if you wanna make it up in acceleration go light weight

to each his own just my opinion ^^^ on flywheel personally i leave it alone and do other things. also i worry about light weight flywheel integrity but have no experience with them to base it on.

maybe someone else will know this but i kinda think doin a light flywheel could be bad cause its kinda similar to doin the underdrive pulleys, that cause all the bottom end and oil pump issues. dampners are heavy cause thats how they dampen so a flywheel kinda does the same thing just the other end of the crankshaft.

 

competition

 

My tuner actually recommended the Action 2KS to me, based on my goals. I'm currently around 200ft/lbs on my boosted integra ls, with no plans to go over about 240. The car is for daily driving and autocross. I did some research, and ended up ordering an xtd stage 2 (carbon-kevlar disc) with 8-lb flywheel for $250 shipped, which is only about $100 more than the clutch kit alone. I figured the stage 3 xtd would've been overkill for my setup. My thinking was that the stock flywheel would probably need resurfaced anyway, and the lighter flywheel would help in autocross. I believe it is the same flywheel that sells on the unorthox website for $400, so I went ahead and got it.

They ended up sending me the wrong disk (stage 3 sprung 6 puck). I decided to keep it though, since people who have used it seem to speak pretty highly of it, especially under 300hp. I believe it is very similar, if not identical, to the Action 1MS kit.

The xtd kevlar disc is a different design than the action kevlar disc however. The stage 2 xtd might not hold 240tq.

Everything is installed now. Only 100 miles so far, so I'm still breaking it in. The engagement is still a little rough, and I'm still not used to it. The verdict is still out on whether I'd recommend the clutch, but I believe it will take everything I ever want to throw at it. Some say a lightweight flywheel isn't very good for daily driving. For me, the verdict is still out on that too.

If you're leaning towards the Action 2KS, I'd say go with it. The action kevlar discs are supposed to last a really long time, and have smoothe engagement. When combined with the dual diaphragm pp, it should easily handle the tq you're wanting to make.