lightweight gears |
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lightweight gears |
T H O M A S |
Aug 17 2009, 07:17 PM
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#1
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Senior Member Group: Members Posts: 626 Joined: 1-August 03 From: Donaueschingen, Germany Member No.: 974 Region Association: None |
inspired by a recent threat here about lightning gears and there benefits ,i decided to give it a shoot and wire edm 1st and 2nd gear .the weight difference form stock to modified is
3rd gear .3764kg ( the lightest gear to slow down for shifting) 2nd gear was .5078kg is now .4398kg 1st gear was .6754kg is now .5468kg gears have bin cryo treated after the machining for testing the transmission will be mated to a 200hp /4 engine i let everybody know if the gears survive and if it makes a difference in shifting Attached image(s) |
ME733 |
Aug 18 2009, 10:21 AM
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#2
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Senior Member Group: Members Posts: 842 Joined: 25-June 08 From: Atlanta Ga. Member No.: 9,209 Region Association: South East States |
(IMG:style_emoticons/default/popcorn[1].gif) Well looks to me like a fools paridise.You have just increased the number of places for stress cracks, (and failure) to occur by a zillion fold. You did mention cyro treating the gears, but what about , actually rehardning the gears, as they surely lost their surface hardness from EDM cutting.,and with all those holes, keeping the gears from distorting(even a little)..is going to be impossable...Need to have a gear run in machine like the factory does, to get the proper mesh for that SET of gears....This is why Gears are made in SETS, and numbered,.thats why mixing gears ,with the same ratio, is not a good Idea...and generally results in noise from that gearset..(for a while, if not forever)..OK you have a race car.You won't hear the noise., but you have a handgrenade waiting to go off., in my opinion. (IMG:style_emoticons/default/popcorn[1].gif)
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proto31 |
Aug 18 2009, 10:48 AM
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#3
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Member Group: Members Posts: 413 Joined: 2-February 06 From: Costa Mesa, CA. Member No.: 5,515 Region Association: None |
(IMG:style_emoticons/default/popcorn[1].gif) Well looks to me like a fools paridise.You have just increased the number of places for stress cracks, (and failure) to occur by a zillion fold. You did mention cyro treating the gears, but what about , actually rehardning the gears, as they surely lost their surface hardness from EDM cutting.,and with all those holes, keeping the gears from distorting(even a little)..is going to be impossable...Need to have a gear run in machine like the factory does, to get the proper mesh for that SET of gears....This is why Gears are made in SETS, and numbered,.thats why mixing gears ,with the same ratio, is not a good Idea...and generally results in noise from that gearset..(for a while, if not forever)..OK you have a race car.You won't hear the noise., but you have a handgrenade waiting to go off., in my opinion. (IMG:style_emoticons/default/popcorn[1].gif) You seem very skeptical... It appears that the original hardening was only effected at the actual cut points, cryo treating the entire gear provides similar hardening characteristics and seems overkill, these gears aren't going to be behind a 400 hp V8. I hardly think that these gears distort during usage, the centrifugal forces are null and any power torque forces are released as the gear spins. I think it's a cool idea, let's see what happens once it get's reinstalled in the the same car it came out of, a good control for comparison. |
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