lightweight gears Options

[r_towle]

Thomas,

If you would like some more data, PM me and I will put you in touch with Insco gears, they make the baker six speed gearbox, as well as many industrial gears....some are three feet in diameter.

They have all the tools, laser, underwater cutting etc etc.

I am sure they will know the affects of what you did on gears....just in case you need another datapoint.

Good luck and please remember to post what happened...

Rich

[McMark]

Thank god for people who ignore the naysayers. (IMG:style_emoticons/default/rolleyes.gif)

[ghuff]

well jake raby uses it for years and so do a lot of other engine builders,http://www.nitrofreeze.com/cryogenic_treatment.html?gclid=CMmY1ZORrpwCFRxNagodJj2Sjw

Basically it is my understanding that NASA first noticed that when bringing stuff back from space the composition of the metal had changed.

Temperature in space is approximately 2.725 Kelvin. That’s almost -270 degrees Celsius, or -455 Fahrenheit


From the internet.

http://www.finishing.com/340/78.shtml

I don't think THOMAS' car will spend much time in outer space. (IMG:style_emoticons/default/lol-2.gif)

lol no. I was explaining where the idea for cryogenically treating metal came from.

[Dr Evil]

Yo T H O M A S,

I have a BUNCH of stock gear sets if you are interested. PM me if you want them (IMG:style_emoticons/default/smile.gif)

[underthetire]

I thinks its very cool... no pun intended. I can't see EDM causing enough heat to re-aneal the gear teeth. EDM is done under oil/or coolant. Should only get hot right next to the cut only. My only concern would be overheating the gear oil. I think the extra holes will cause some major increases in foaming. Too much oil on gear stacks and bearings causes a lot more friction and heat.

[Joe Ricard]

If'n you need a test pilot I promise to run the piss out of it.

2316 in a dedicated race car. and it's running somewhere all the time.

[T H O M A S]

the foaming might be a problem ,one side of the holes is covered by the dog teeth and the other side is close to the intermittent plate, will see ,the first gear set is going in a daily driver with a big /4

[r_towle]

Let me ask this.

Why?

Just curious.
Is there a significant weight savings?
Will the motor spin up faster?

Any basis, or is this a fun test?

Rich

[CliffBraun]

less mass is always better, less rotating mass is always better, it's taking a pound off, but it's gonna matter somewhere.

Oh, also re: naysayers, I can't count the number of times I've had people tell me I can't do things that I was already running on for 6 months.

[turboman808]

Let me ask this.

Why?

Just curious.
Is there a significant weight savings?
Will the motor spin up faster?

Any basis, or is this a fun test?

Rich

Yeah no one has really gone into this but I think it's more about a longevity thing. Heavier gears cause the syncros to wear faster. Also can make it so you can shift the transmission quicker.

Of course I don't know shit and shit and this is what I imagine it would do.

[J P Stein]

Dismissing someone as a "nay sayer" precludes the possibility that * they know something you don't*.

That said, this project is worthwhile, IMO.

The object of any such undertaking should be to do everything possible to ensure that the modification survives the test period. The suggestion was made to use sound engineering principles that strengthen the existing materials. This was dismissed by at least one person that doesn't recognize sharp edges even when he blows up the pics. It's obvious that some here have little/no real world experience in actually building things for a living. A fella that has 20ish years of experience of NDT in the aircraft industry *knows something you don't*.

I have been working on my own weight reduction in the same area. It is only worthwhile in the narrow area of autocross. The first section of testing is about over....is the basic precept worthwhile......It seems to be. The next section is the actual weight reduction. This would have gained about 300 times the rotating weight loss over what has been described here. That may be worth a tenth or 2.
The bits needed are on the shelf.....but I'm selling the car. The next owner can deal with it.

[T H O M A S]

longevity of the gear components (syncro,dogteeth and slider)is what i am looking for,90% of all the transmissions i am rebuilding need new components on 1st and 2nd,if you want faster shifting you have to go with a dog box( straight cut gears)

[Dr Evil]

Why would constantly meshed straight cut gears shift faster??

[T H O M A S]

no side load and no clutch for up shifting or down shifting

[T H O M A S]

asd

[aircooledtechguy]

I like this type of grass-roots experimenting and testing; it's what makes the hobby fun and ever changing.

Those straight cut gears must make for a loud tranny. Of course for a race car, who cares, right??

[sean_v8_914]

"every gram must be accelerated, braked and cornered"

[jcd914]

Why would constantly meshed straight cut gears shift faster??

The straight cut gear teeth have nothing to do with the faster shifting. It is the lack of synchros and big locking blocks instead of dog teeth that make the shifting faster. Since this type of gear engagement is only practical for racing they also use the straight cut teeth. The straight cut teeth are noisy but there is less friction loss than with the angle cut teeth.

Jim

[J P Stein]

There are many things that go into a fine shifting trans. The 901 presents several challenges and there are many ways to attack this. I wish you luck.
Mine shifts finer than frog hair under trying circumstances. There are only one up & one down in this vid...("many ways to attack").

http://www.youtube.com/watch?v=7_nANXY8KBs...player_embedded