skkitz

So got my motor to the guys that are rebuilding it (Defined Autoworks - Groveport ohio) and turns out i have a 8lb lightweight flywheel but on another note I have a na 88 rx7 with a 90 motor and trans would it be worth it to upgrade to a stage 2 clutch?

Akagis_white_comet

iTrader: (4)

I'm not too keen on the "Stage xyz" clutches, and I don't think you'd really need to upgrade your clutch unless your engine got a big boost in torque from Logan by porting or forced induction. He's a good guy and wouldn't sell you something you didn't need.

My standard for clutches is ACT as each clutch's capabilities are stated upfront for rational, realistic comparison, without theatrical nomenclature. I have heard some reports of the torque ratings being a bit conservative, but this is one point to their merit. It is better to be pleasantly surprised when your clutch holds more than anticipated, rather than finding out that it's not performing as advertised.

I'm using a Turbo II HDSS Clutch (Heavy Duty Pressure Plate & Street/Strip Disc) from ACT on my 20B-REW FC, rated for 330 ft.lbs. As my car has not seen a dyno yet, nor have the turbos been plumbed in, I can't really say how much power it's putting out. The only indication will be when the clutch slips

skkitz

haha well my clutch is getting on the worse side of the spectrum and seeing how the motor is out I figured I would just upgrade the clutch and replace the throwout bearing seeing how it has been squealing for 6 months. But other than that I'm getting my s5 motor rebuilt with s4 housings and s4 rotors with s5 eccentric shaft and irons. Also I plan on turboing my n/a have everything i need except either a stock turbo or a aftermarket turbo header.

Evil Aviator

No, it's not worth upgrading the clutch. A regular replacement clutch disk is only about $100, and it will work fine for now. Were you to upgrade, you would need a clutch and pressure plate kit, which is typically in the $300 range. Since you do not yet know how much torque your turbo engine will have, you can't select an appropriate upgraded clutch pack. Even worse, if you plan on making any significant torque with your turbo engine, you will need to upgrade to a TII transmission, which will not accept an NA clutch pack, which would mean that you spent $300 for nothing. Don't upgrade until you actually know what you need.

Also, "Stage 2" is just marketing hype, and does not mean anything useful. Rather than basing your choice on a fancy name, your clutch and pressure plate selection should be made on the torque rating, moment of inertia, and engagement characteristics of the equipment. A good race shop can help you with this.