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Old 07-31-2008, 10:01 PM   #2506
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Would casting be easier or harder for prototyping? What about production cost?
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Old 07-31-2008, 10:13 PM   #2507
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A machined piece can easily be one-offed from the CAD program to a CNC mill. For a cast piece, you have to make the mold (which is where all the money and time is). I imagine they would rapid prototype or machine before making the mold to ensure it fits, but the prototype isn't exactly the same as the production piece. With a machined piece, the prototype is essentially exactly the same as the production piece. Classic case of easy prototyping and testing versus cheap piece cost once in production.

Or something like that. I wasn't sure of the material properties, though.
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Old 08-01-2008, 08:19 AM   #2508
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Those parts arnt cast they are machined peices that have been tumbled and have not been polished yet The upright look like they've been sandblasted to remove tooling marks
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Old 08-01-2008, 08:25 AM   #2509
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Those parts arnt cast they are machined peices that have been tumbled and have not been polished yet The upright look like they've been sandblasted to remove tooling marks
that's all i was saying, a different look is all.
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Old 08-01-2008, 10:03 PM   #2510
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I got the new diffs for my Phi today from Corally USA.

No instructions; but, looks fairly simple to assemble.

One question though...Do the concave washers go in like ( ) or ) ( to each other under the tightening nut???

Quick reply really appreciated...
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Old 08-01-2008, 10:18 PM   #2511
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<> is how i put them. Puts pressure against the center of the bearing. Built them tonight, ill be running them on carpet tomorrow. They went together well looking forward to running them.
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Old 08-01-2008, 10:43 PM   #2512
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Thanks Jeff.

Thought about my old JRXS diffs and built a pair with them with the washers positioned ( ) ....as you say. Perfect!

Even with ceramic balls (18 of them per diff), these puppies cannot be called "light weight" anymore. Must be about 10gm heavier than my old Phi units. Sure do build fast and easy. Looks like my BL slip will be a thing of the past; so, I am thrilled.

Took a minute or so to figure how to use the new 7mm wrench.

Bill
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Old 08-01-2008, 11:06 PM   #2513
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About 6 grams but i really think its gunna help with keeping the diff more consistent. Yeah super easy to build and super smooth. That thrust bearing is a beast.
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Old 08-01-2008, 11:16 PM   #2514
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Will give it a go with my asphalt car tomorrow and my carpet car on Sunday.

FYI...We have the NorCal Hobbies carpet track setup as a 3/4 size IIC course. The real IIC course will feel like a freeway after practicing a few weeks on this puppy.
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Old 08-02-2008, 12:11 PM   #2515
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Quote:
Originally Posted by Still Bill View Post
Took a minute or so to figure how to use the new 7mm wrench.

Bill

hold wrench in hand "firm grip prefered" twist/turn to the left or right as needed. I'll have Javier post a diagram shortly to help you out....
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Old 08-02-2008, 07:32 PM   #2516
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hold wrench in hand "firm grip prefered" twist/turn to the left or right as needed. I'll have Javier post a diagram shortly to help you out....
Stalker!
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Old 08-02-2008, 07:39 PM   #2517
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Originally Posted by Jeff Cuffs View Post
<> is how i put them. Puts pressure against the center of the bearing. Built them tonight, ill be running them on carpet tomorrow. They went together well looking forward to running them.
After today's asphalt racing at NorCal Hobbies, I definitely feel that I can run a lot less diff grease than I was using with the old Phi diffs. Really great that I won't have to deal with the black thrust bearing grease any longer.

More tomorrow...after carpet session...

Bill
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Old 08-04-2008, 01:14 PM   #2518
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Anyone else get the wrong bearing in the new diff packages? seem all the package we got included a 5x9 I think intended to go in the pulley. but it needs like a 5.5x10mm??? don't have my calipers handy. guess I got a few extra wheel bearings.....

The new diff's are the ticket.. they are butter smooth even with the stock steel balls.

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Old 08-04-2008, 03:18 PM   #2519
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Originally Posted by MAD916 View Post
Anyone else get the wrong bearing in the new diff packages? seem all the package we got included a 5x9 I think intended to go in the pulley. but it needs like a 5.5x10mm??? don't have my calipers handy. guess I got a few extra wheel bearings.....

The new diff's are the ticket.. they are butter smooth even with the stock steel balls.

TZR
Yeah, some of them have the incorrect bearings. It needs a 12th scale axle bearing, 1/4 x 3/8 is what Rob said. I guess it isn't all the packages.

Jeff
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Old 08-04-2008, 03:29 PM   #2520
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Where can I get this new diff? The website doesn't show anything.
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