Does this flywheel need resurfacing? - Alfa Romeo Bulletin Board & Forums
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post #1 of 30 (permalink) Old 03-15-2010, 03:18 PM Thread Starter
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Does this flywheel need resurfacing?

There was some good chat on this board about when to resurface a flywheel. I agree with the ain't broke philosophy, but problem is I can't really tell if its broke or not. It sure is dirty, and seems to be somewhat marked by the surface of the friction disc (pic of that attached as well for reference). My instinct tells me that this flywheel is past the emery paper and wipe down level?

Presuming that it does need resurfacing... can you all share your experiences with lightening the stock flywheel? I think Jim K's book recommends taking 3-4 lbs off. Given that this is for his recipe for a streetable motor - I'm guessing that removing 3-4lbs will still yield a very drivable motor?
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post #2 of 30 (permalink) Old 03-15-2010, 03:34 PM
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Saturday I took out 2 kg from my spider flywheel, I still have to take some photos, will post them when available.

I hope the engine will continue being drivable, but have some concerns about the ability of the idle speed controller (motronic) to control the idle in this "new" situation.

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post #3 of 30 (permalink) Old 03-15-2010, 03:40 PM
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But, you are running a scatter shield aren't you ??

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post #4 of 30 (permalink) Old 03-15-2010, 03:50 PM
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Personally, I would not lighten the flywheel for street use, and the flywheel in the photo's I would have refaced. And seeing as everything is torn down, would also replace the clutch assembly while I was at it.

The last thing one needs is to put it all back together and have a problem.

I would also note that Alfa provided a steel flywheel for the GTA rather than a cast one when they wanted weight reduction.

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post #5 of 30 (permalink) Old 03-15-2010, 03:58 PM
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No shield, the flywheel has not loose any strength, just extra weight, from 9.3 kg to 7.3 kg without pressure plate, pressure plate is 4 kg more! and of course remains unchanged.

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post #6 of 30 (permalink) Old 03-15-2010, 05:15 PM
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its fine use it.

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post #7 of 30 (permalink) Old 03-15-2010, 05:16 PM
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I guess that it's something like bullfighting.....

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post #8 of 30 (permalink) Old 03-15-2010, 05:25 PM
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get real the clutch plate has 10 k +
Put it in & use it.
You need a containment sheild if you want to do silly stuff.
How deep are your pockets?

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post #9 of 30 (permalink) Old 03-15-2010, 05:27 PM Thread Starter
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Quote:
Originally Posted by crashmctavish View Post
get real the clutch plate has 10 k +
Put it in & use it.
You need a containment sheild if you want to do silly stuff.
How deep are your pockets?
not following... 10k+? silly stuff?
I have a new clutch sitting next to me. Just debating whether or not to resurface the flywheel and if so, if I should have it lightly lightened.
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post #10 of 30 (permalink) Old 03-15-2010, 05:31 PM
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10 k miles
if you want to throw money at it fine, i would spend the cash elsewhere.

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post #11 of 30 (permalink) Old 03-16-2010, 04:35 AM
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Richard Jemison lightened my flywheel for me. It improves shifting, prolongs the life of the synchros and is not going to explode.

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post #12 of 30 (permalink) Old 03-16-2010, 03:59 PM
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Flywheels

Your flywheel is fine and I would not consider resurfacing it.
The flywheel can easily be lightened 5 lbs with no safety issue.
Below are Pics I sen Gordon after playing with 3 1300/100 flywheels one afternoon. Weight went from 24+ pounds to 17 lbs. including ringgear.
Plenty of weigh for a mouse motor.
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post #13 of 30 (permalink) Old 03-16-2010, 06:25 PM
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Thanks RJ. I know you have one like this too. Made by Ron Neal at Ausca about 1967-1970, 14 lbs. Lived behind a '65 GTA race engine for many years.
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and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
Now:
Illinois Chapter Director AND Charter Member of THE CONFUSED AND INCORRECT
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post #14 of 30 (permalink) Old 03-16-2010, 06:31 PM Thread Starter
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Can anyone recommend a machine shop familiar with Alfas in New England or NY? I'm back and forth between New Haven CT and White Plains NY.
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post #15 of 30 (permalink) Old 03-16-2010, 06:43 PM
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Here are a couple of others. First an old aluminum Tilton @ 9 lbs. It has a GTA disc and P.Plate on it that are much heavier than the flywheel. Alfar 7 knows how to fix that. The mouse is for Richard's "mouse engines". Last is another nice one I've been using. These weigh 7 lbs. These aluminum wheels don't come apart like either grey cast iron or nodular iron, and can be very light.
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Gordon Raymond
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and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
Now:
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