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Underbody braces, turbos and more!

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PostPosted: Sat Feb 27, 2016 12:57 pm 
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Suzuki Elder
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Joined: Mon Dec 01, 2003 12:47 pm
Posts: 11647
Location: columbus, ohio
i just can't keep my hands off some of my engine parts. =)

i have been whittling on g13 flywheels for several years but i just ran my third run and probably final single machine lightened flywheel as well as the next phase machine skeletonized flywheel. the purpose of that experiment was to see just how much i could lighten a factory flywheel without compromising its strength.

this is what i do to lighten a g13 flywheel with material removed from it's perimeter.
Image

the step beyond was to completely remove the material at the perimeter which created windows. removal of that much material required that the starter ring gear was tig welded into place on the back side.
Image

here's a comparison shot.
Image

as always, when you machine a flywheel it breaks the crystallization of the cast steel so it is imperative that you have the friction face surface ground just as you would when having the flywheel serviced prior to installing new clutch components.

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1991 Blue Geo Metro Convertible highly modified 1.0L Turbo3 5 spd. - 1991 Red Geo Metro Convertible customized with a Twincam 5 spd.

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PostPosted: Sat Feb 27, 2016 2:00 pm 
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Joined: Tue Aug 04, 2009 9:27 pm
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Location: walsh,alberta,canada
looks great! now even cheaper to ship! :-P

now presenting Richards near zero mass low inertia flywheels...... :-P you may need a 8600 redline to launch...... :twisted:

that engine will spin up quicker than a 7 year old with a case of red bull!

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89 1.0 turbo firefly
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89 white gti twincam....need I say more?
92 metro aka ''blue lump of coal''
92 white metro lsi vert
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PostPosted: Sat Feb 27, 2016 6:13 pm 
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Teamswift Racer
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Joined: Fri Apr 02, 2004 5:56 am
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Location: Christchurch NZ, quake capital
Good to see someone finally going the whole hog, they are looking pretty similar to the billet ones that dmwDave has been selling for years.
Image

3.05kgs/6.7lbs... my flywheel is light but the clutch cover is heavy, I'd like to go to a twin plate clutch but that would mean getting yet another flywheel :|


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PostPosted: Sat Feb 27, 2016 10:44 pm 
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Suzuki Elder
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Location: columbus, ohio
gee whiz! my flywheel does look a lot like that pretty billet one. :wink:

i have been sneaking up on this skeletonized design for a few years and it seemed a pretty normal progression from the lightened flywheels i have turned out in the past.

and you know, the proof is in the pudding. the improved throttle response is well worth the effort and taking the material from the perimeter reduces the rotating mass where it counts the most.

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1991 Blue Geo Metro Convertible highly modified 1.0L Turbo3 5 spd. - 1991 Red Geo Metro Convertible customized with a Twincam 5 spd.

My Turbo3 Project
My Cardomain Page -Ol' Blue
My YouTube Channel
My Photo Gallery
SAAB Sonett II


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PostPosted: Sat Feb 27, 2016 11:04 pm 
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Teamswift Racer
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Joined: Fri Apr 02, 2004 5:56 am
Posts: 2311
Location: Christchurch NZ, quake capital
Taking material from the periphery is the only safe place to take it from, there is a local machine shop here that does a lot of 4age and honda flywheels exactly as you have done yours and I have't heard of any failures, if Dave wasn't selling his billet ones I would of got my stock one skeletonized years ago as it's one of the best bang for buck improvements you can do.


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PostPosted: Thu Mar 03, 2016 10:18 pm 
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Island Inbreeder
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Joined: Tue Oct 18, 2005 6:56 pm
Posts: 6324
Location: Emerald city Washington
would that be a $400 flywheel.?
if you could find one


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PostPosted: Sun May 01, 2016 11:18 pm 
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Joined: Thu Jul 01, 2004 3:52 am
Posts: 1442
Location: Vancouver, BC, Canada
All I can say... wow.. great job... I am planning to light the flywheel as well.

How extremely carefully is it machining that flywheel without break it? Install and test it?

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PostPosted: Wed May 04, 2016 11:01 pm 
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Joined: Thu May 12, 2011 10:08 pm
Posts: 603
Location: texas houston
Richard can we still get this done through you? I have been considering a aluminum fly wheel , but i am indecisive. :huh:


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