1899 replies to this topic

[fischmama]

How is the overall height of the new setup compared to the old setup? hard to tell on the pic if there is any difference or not.

[lookforjoe]

measured out the same between the two, about 8.25" from back of ring gear to fingers

[BlackT5]

Hmm. I thought you were supposed to use a dualmass clutch kit with that flywheel? Your pressure plate looks like one from a singlemass kit. Which Spec kit did you get? I searched but couldn't find where you mentioned it.

Do you have any pics of when you tightened down the pressure plate originally? Did the fingers fully retract at that point?

The measurement from the ring gear could be close to the same as original if the fingers never sat correctly.

[blkaplan]

BlackT5, on 24 May 2012 - 02:38 PM, said:

Hmm. I thought you were supposed to use a dualmass clutch kit with that flywheel? Your pressure plate looks like one from a singlemass kit. Which Spec kit did you get? I searched but couldn't find where you mentioned it.

Do you have any pics of when you tightened down the pressure plate originally? Did the fingers fully retract at that point?

The measurement from the ring gear could be close to the same as original if the fingers never sat correctly.

+1, The single mass flywheels should be flat. Unless you spec'd some different pressureplate application that uses a raised mounting surface.

If infact the pressure plate was intended to be used with a flat flywheel, the way it's installed would give it very little clamping force as the diaphram should be compressed as it its torqued to spec onto the flywheel.

[Captain Bondo]

maciekb2002, on 24 May 2012 - 03:02 AM, said:

Just tell me how the f... Company as big as spec missed that little fact that springs can be pushed to far.
Parts they use are some cheap mexican junk . It probably has that globe logo on it.

To me, it looks more like that clutch it meant to be used with a normal flat flywheel. You can't slag Spec for that.

[Big Will]

I believe he used the flywheel that both ViVA and a VS vendor in the UK sells that is meant to allow the M66 to be mated to a single mass style clutch kit hence the single mass flywheel.

[fischmama]

Big Will, on 24 May 2012 - 08:58 PM, said:

I believe he used the flywheel that both ViVA and a VS vendor in the UK sells that is meant to allow the M66 to be mated to a single mass style clutch kit hence the single mass flywheel.

Not according to their website... They only recommend to get the sprung version of the clutch disc for the spec version.

http://www.vivaperfo...manual-gearbox/

[BlackT5]

Big Will, on 24 May 2012 - 08:58 PM, said:

I believe he used the flywheel that both ViVA and a VS vendor in the UK sells that is meant to allow the M66 to be mated to a single mass style clutch kit hence the single mass flywheel.

Viva lists the flywheel to work with M66 as a direct replacement, meaning to work with the dualmass clutch. http://www.vivaperfo...manual-gearbox/

They link to a Spec kit (SO603FS) that is listed to work with both the stock dualmass flywheel or their singlemass replacement. It also gives the option for sprung or unsprung disc depending which flywheel you're using. http://www.vivaperfo...-t5-c30-c70-t5/

[Johann]

Page 87.

It's the dual mass version pressure plate,



The single mass flywheel is made to dual mass spec so it is higher compared to an 850 style single mass.

Single mass pressure plate looks like this,

[blkaplan]

Got yah, atleast he has the correct parts.

Please forgive my ignorance on this but if you are eliminating the dual mass element of a dual mass flywheel why wouldn't you just run a single mass flat flywheel? Is that not compatible with the m66?

[fischmama]

blkaplan, on 24 May 2012 - 11:36 PM, said:

Got yah, atleast he has the correct parts.

Please forgive my ignorance on this but if you are eliminating the dual mass element of a dual mass flywheel why wouldn't you just run a single mass flat flywheel? Is that not compatible with the m66?

The clutch is the issue. The spline count is different on the M66 and since all cars came with DM that had a M66, its the only clutch/PP version on the market AFAIK.

[blkaplan]

would people be interested in a clutch kit for a single mass flywheel on a m66? (sorry to sidetrack)

[lookforjoe]

Fingers looked pretty normal to me when I originally installed it



I'll post pics later of how they looked when i removed the trans, it's no wonder the pedal travel & engagement was off. edit - forgot I already did that....

Also, not bottom end damage at all, don't know what all the particles were, but not my bearings.

Piston has slight crown damage - the fucking intake valve broke below the keeper, like last year. I'm getting all Volvo valves to replace it & the other 9 intake valves before it happens again. Don't know if the over-rev really had much to do with that or not.

So, one bent valve, one crown to clean up & put the whole motor back together again.

The clutch problem all stems from the Kalmar Union ( I've emialed Don Norchi about it this evening, hopefully he'll reply tomorrow) flywheel, which was not cut to the correct depth. the distance from the PP shoulder to the disc surface is only 7.75mm, the stock is 9mm, and the Spec disc is thicker, so basically I ended up with the fingers depressed 2mm further than designed, which created the slipping condition once I actually put a real demand on it.

Spec sells the (DM replacement) SO603F kit with either solid or sprung disc, apparently you have to specify what you want. I'm getting a sprung disc at cost, I don't want the extra load on the trans that the solid disc seems to create.

[Rsterns]

Don't want to sound like a broken record, but as long as it's apart, why not cryo treat the valves and springs as a minimum. Shipping would be cheap, your springs will be more resilient and normalized regarding stresses in the metal. That equates to more even tension and longevity. Valves will dissipate heat more efficiently and you will add life to the ware surfaces.

[lookforjoe]

Not gonna cryo, I'm hoping to get it all back together pronto.

Pics...

normal (stock) disc offset



Stock on KU flywheel










piston damage



valve damage





cleaned up



no bearing damage





removed baffles, drill & tap





gonna add baffles in the center like the "R" pan, since I have it out again

[fischmama]

Just as an FYI, Doug broke a Valve Spring retainer because (our conclusion) of overreving the engine. 8000+ is not good for our valves from what I have seen so far. With given mods 8K maybe ok but 8400-8600 seems to be a tad too high.

[lookforjoe]

I'm gonna drop limit to 7600 once it's running, but I still want to dyno to 8K once it's setup, just because.

Any chance you can measure the R baffle distance from the pan floor to the bottom of the baffle?

[fischmama]

lookforjoe, on 25 May 2012 - 02:47 AM, said:

I'm gonna drop limit to 7600 once it's running, but I still want to dyno to 8K once it's setup, just because.

Any chance you can measure the R baffle distance from the pan floor to the bottom of the baffle?

Will do tomorrow. Already left the shop for today.

[Korruption]

Damn. That's some carnage. Will you go back to the DM flywheel?

[Captain Bondo]

Well that's a relief if it's just the valve. On a 90mm stroke there's not much point is exceeding 7600rpm. Regardless of the valve train the piston speeds go past the typically max 25m/s recommended for any sort of street car.

Have you talked to southbend about a clutch? I am sure they'd sell you a 707 pressure plate with a custom disc. Then you could use with a "normal" flat flywheel - either a billet one with a 707 bolt pattern or a stock one with a redrill. Both the 707 and south bend have a good reputation. Mine was nowhere near slipping at 540whp/470ftlb