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> Modified flywheel, messing around on a cnc at work
muddboy
post Jun 8 2006, 11:35 PM
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was just mesing with one of the cnc machines at work today and came up with this:(IMG:http://www.t-mobilepictures.com/photos/photo04/1e/85/4aa050a1a584.jpg)
(IMG:http://www.t-mobilepictures.com/photos/photo09/5f/41/1e33ff901be0.jpg)

any suggestions? I'm planing on tweeking it more. Its 13lbs now
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Aaron Cox
post Jun 8 2006, 11:36 PM
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if you need a test dummy to run it....

im all yours (IMG:style_emoticons/default/smile.gif)

looks super cool, functional and fun at the same time!
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Type 4 Unleashed
post Jun 9 2006, 12:00 AM
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Here are some ideas:

(IMG:http://i71.photobucket.com/albums/i134/Type4Unleashed/5.jpg)
(IMG:http://i71.photobucket.com/albums/i134/Type4Unleashed/2.jpg)
(IMG:http://i71.photobucket.com/albums/i134/Type4Unleashed/Schwungrad36kggebohrt_3.jpg)
<a href="http://photobucket.com" target="_blank"><img src="http://i71.photobucket.com/albums/i134/Type4Unleashed/Schwungrad32kggebohrt.jpg" border="0" alt="Photobucket - Video and Image Hosting"></a>
(IMG:http://i71.photobucket.com/albums/i134/Type4Unleashed/3.jpg)
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muddboy
post Jun 9 2006, 11:50 PM
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That looks like alot more than what I'm looking to do... but the pattern on the cutts looks intresting... I have 2 more used flywheels to test this out on. I will have to try writing a new program to do something like that


and Aaron something could be worked out????
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So.Cal.914
post Jun 9 2006, 11:56 PM
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i didn't think they could get any lighter than what I am running, I WAS WRONG.

Looks Good.
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LowGT
post Jun 10 2006, 12:02 AM
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I'm curious, what do those 2 styles weigh?
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Mueller
post Jun 10 2006, 12:09 AM
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nice.....Automotion used to sell flywheels cut in a similar fashion...I asked Rich @ High Performance House about them and he mentioned that the torque requirred to turn over a Type IV had a tendancy of breaking those modified flywheels...of course it could have been due to improper machining or not leaving a nice small radii.......let ArRoN run one and do some testing (IMG:style_emoticons/default/burnout.gif)
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McMark
post Jun 10 2006, 02:04 AM
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Breaking them where? I'm curious.
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Mueller
post Jun 10 2006, 01:48 PM
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QUOTE(McMark @ Jun 10 2006, 01:04 AM) *

Breaking them where? I'm curious.



the teeth portion "seperates"...I've never seen one break, but Rich sells a differently modified flywheel due to that happening I guess a few too many times...
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Aaron Cox
post Jun 10 2006, 01:50 PM
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hey! i gotta swap to my short geared tranny soon... so i would be in a position to try one (IMG:style_emoticons/default/smile.gif)
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scottb
post Jun 10 2006, 01:55 PM
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who wants a PEZ?!
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i am gonna be putting in a new motor/tranny soon if'n you need someone to run one.... i will even send you my old flywheel as i have a newly machined backup....

cheers!!!
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Cap'n Krusty
post Jun 10 2006, 01:56 PM
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Interesting. However, removing weight from points near the center may make it lighter in terms of total weight, but weight removed there has little effect on the way it'll rev, and it weakens it considerably. That said, I've seen an old T4 Super Vee flywheel that looked suspiciously like chicken wire .................. Even the clutch mating surface was heavily drilled. The Cap'n
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Aaron Cox
post Jun 10 2006, 01:59 PM
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weight further from axis of rotation makes biggest difference as krusty is saying
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TimT
post Jun 10 2006, 02:14 PM
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906 flywheel & my 911 flywheel fwiw



Attached image(s)
Attached Image Attached Image
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anthony
post Jun 10 2006, 02:38 PM
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QUOTE(muddboy @ Jun 9 2006, 10:50 PM) *

That looks like alot more than what I'm looking to do... but the pattern on the cutts looks intresting... I have 2 more used flywheels to test this out on.



What about balancing the flywheel after all the drilling?

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smdubovsky
post Jun 10 2006, 02:43 PM
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QUOTE(anthony @ Jun 10 2006, 04:38 PM) *

What about balancing the flywheel after all the drilling?


Its absolutely required after any machine work to any rotating assembly.

SMD
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Mark Henry
post Jun 10 2006, 03:13 PM
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The Crusty one is right about weight removed from near centre...useless. Also never cut the backside of the friction surface.

You will need to beef up your valve train or you will float your valves like crazy. I don't recommend doing this on a daily driver, no inertia, you will be on/off the gas all the time.
With a light flywheel, if you do put it on a DD, you'll need the power to back it up.
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muddboy
post Jun 10 2006, 03:34 PM
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The shop I am at can do the ballancing (and I'm planing on it for the test ones), and we are getting the wheel to grind the surface.

QUOTE(Mark Henry @ Jun 10 2006, 02:13 PM) *

The Crusty one is right about weight removed from near centre...useless. Also never cut the backside of the friction surface.

You will need to beef up your valve train or you will float your valves like crazy. I don't recommend doing this on a daily driver, no inertia, you will be on/off the gas all the time.
With a light flywheel, if you do put it on a DD, you'll need the power to back it up.



I am trying to get a couple of profiles to cut to... I want to have 2 versions, a light and lighter. That first one is at 13lbs, and I dont want to be much lighter for this one... then I'll try to do one around 10 or so lbs.
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gregrobbins
post Jun 10 2006, 04:12 PM
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I don't remeber where, but I read about someone testing different flywheel weights. They had one down to 9 lbs but it was a track only application as it reved too wierd for street use. They had one at 11 lbs that worked better on the street, but it too was tempermental. I recall they figured 14 lbs was a good all around solution.
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Mueller
post Jun 10 2006, 04:16 PM
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is it only me that finds freshly machined parts sexy??? (IMG:style_emoticons/default/drooley.gif)
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