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Does anyone have the information on how much stock S2 clutch and fw combo weights?
I'll weigh mine when I get it out. As far as I know it has a stock clutch, but it's worn so the weight may not be exact. I'm planning to lighten the FW f I can find a shop that knows how. I'll weigh it beforehand. If the clutch has springs in it I'll make a note.
There are many turbo experts here, how does this match looks to you for 3.0 8V 8:1 engine?
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Otto, thanks.
I have the clutch & FW out, did you want the weight with or without the ring gear? Usually that moves to the new clutch (I've already moved it but it's easy to take back off).
Just FW and complete clutch. Ring should be the same weight on all cars I guess.
OK. I should mention that after removing the clutch I discovered mine isn't stock. The clutch itself doesn't have the rubber center, it has 4 springs. I don't know who the manufacturer was. Is it still interesting?
I don't think S2 came with rubber center clutch. Im trying to figure out the balance of S2 engine, if the clutch with flywheel is of significantly different weight than 951, that would be an interesting piece of front harmonic dampener puzzle.
I'll weight it tomorrow then and I'll weigh the starter gear ring separate. All I have is a bath scale so it may not be real accurate.
From what I've found out, the S2 flywheel weighs 16 lbs and experiments Porsche ran with lighter flywheels didn't all work out well. I'm interested to know what it weighs too. I've heard there was a custom aluminum billet flywheel made by Porsche Motorsports, and I'd first heard rumor it was 16lbs and they only made a few, now NLA. I've also heard attempts to use the 8-9 lb. flywheels (an Italian name, can't remember exactly) haven't been all that successful because of vibration. There's a separate harmonic balancer on the front of the crankshaft and if you lighten the flywheel you need to put more weight up front to compensate? These are just stories I've read here and other places, not personal experience, but I thought I'd pass on the gossip anyway, maybe someone else will comment?
As I understand, the lower weight of the FW is compensated by a harmonic balancer built into the crankshaft pulley on the front of the engine, so the net rotating mass may be roughly equivalent.
Looks very similar to the blocks we have refinished here in Sydney.
Here is one of our latest 3.0ltr blocks. First pictures with a dry bore, you can see its got a slight matt finish to it, the last one with the pistons installed and oil on the bore. I take it your machine shop has done this finish before, if so i think you can trust their work
Regards
Sean
I lapped the cyl with sunnen paste and got the desired dull finish.
Maybe it was exposed enough when I got it, but the difference is very obvious..
Left after AN30 treatment, Right as I got it from the shop..