I bet it’s not as bad as mine
From what I understand, the harmonic balancer doesn’t address this “harmonic”. Also, from what I’ve been advised, the light flywheel probably does not help. Mine has standard flywheel though and still vibrates like a bastard. I drive around town in 3rd gear at 60k/h just to avoid it - and so I can see out of my rear vision mirror!

This one doesn't seem too bad once your mobile. It is bad when stationary though. Thanks for the feedback. At least I'm not alone and leads me to think it will not be a reliability issue but more of an annoyance

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1310 SC 1969 Morris Deluxe - 15psi boost
1293 1968 Morris Deluxe Miglia - 45 Weber
HSV Maloo Z Series - Comp Cam - 300rwkw
Ford DF LTD - 5Ltr

Yep, I wouldn’t be worried about too much. Most folks think I have solid engine mounts in mine it vibrates so much.

Even the 1275 Cooper S was criticized for rough running when released. Not much has changed...
However, my 1412 stroker was quite smooth when built, it had a lightened stock flywheel, but not ridiculously so.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Drmini do you think a light flywheel helps or makes it worse?

I think flywheel lightening helps but a race steel flywheel is too light for the road IMO.
Makes drop gears rattle more at idle.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

HI Mini66
One thing that will make them vibrate at idle is if the centre main is on the way out, do you have good oil pressure?
Are the straps on the flywheel bent? is the backing plate central to the flywheel?
The flywheel would have to be a long way out of balance to make it vibrate badly at idle.
I can check it for you but the freight down and back will be expensive, and freight is very slow at the moment with AUS Post.
Nearly quicker to drive down with it I can do it while you wait for a packet of Monty Carlos and a smiley face
Graham russell

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"It's better to be not informed than ill-informed"

G'day Graham
The idle is pretty smooth. Vibration is at about 1800-2000 rpm and smooths out again after that. New engine only about 20kms testing on it so far. Good oil pressure 50psi idle to about 75psi when revved. Generous offer mate but this car isn't rego'd yet. I havent pulled the flywheel yet, job for this arvo. Just tuning the weber right now. I will get back to you.
Cheers
Rick


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_________________
1310 SC 1969 Morris Deluxe - 15psi boost
1293 1968 Morris Deluxe Miglia - 45 Weber
HSV Maloo Z Series - Comp Cam - 300rwkw
Ford DF LTD - 5Ltr

Just realised you meant drive down the flywheel itself not the car.. All good mate I am in no hurry, I will get back to you after I wrestle this thing off with engine in situ. Always done it engine out in the past so this could be fun!

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_________________
1310 SC 1969 Morris Deluxe - 15psi boost
1293 1968 Morris Deluxe Miglia - 45 Weber
HSV Maloo Z Series - Comp Cam - 300rwkw
Ford DF LTD - 5Ltr

Please let us know how it goes mini66, really interested to see if you find anything.

Problem found. Bolt and spacer missing from clutch. See attached. Not loose in clutch housing either. Made up some replacements and the weight is 37 grams. No wonder it was vibrating. Unfortunatly it turns out that the thread is stripped. Can you helicoil steel at 3/8 unff?
Wild looking flywheel!



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_________________
1310 SC 1969 Morris Deluxe - 15psi boost
1293 1968 Morris Deluxe Miglia - 45 Weber
HSV Maloo Z Series - Comp Cam - 300rwkw
Ford DF LTD - 5Ltr

Not all butchers wear aprons.

Good catch.

Hmm

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

Those straps are back to front unless the image is reversed. Flywheel bolt should be to left of backplate bolt.
Flywheel rotates anticlockwise.
If image is correct, the straps are in compression underer load, not tension. No wonder it vibrates if so.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Hey mate
Picture is not in reverse. I am trying to source a new flywheel at the moment.
Was going to helicoil it but being a homemade jobby I don't trust it. Your comments just add to that decision. All of the bolt holes are 3/8 instead of 5/16.

Edit. Sorry I have taken that in reverse somehow. Strap bolts are to the left in real life

The clutch seemed to be working ok with just the 2 straps albeit it was adjusted a fair way in (fair bit of load still on the release bearing whilst clutch engaged)

I did some quick research and 37grams doesn't seem a hugh amount in flywheel balancing terms. I really hope this is the prob. I am 90% sure it will be. Home bodged fw is probably out on its own before adding clutch compnents


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_________________
1310 SC 1969 Morris Deluxe - 15psi boost
1293 1968 Morris Deluxe Miglia - 45 Weber
HSV Maloo Z Series - Comp Cam - 300rwkw
Ford DF LTD - 5Ltr