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Old 03-03-2005, 09:52 AM   #16
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Any one that thinks the 415 was the first car with this layout and that any car built after the 415 is a copy or clone of the 415, probably doesnt have enough experience at driving or set ups for it to make any difference what kind of car you buy, so it would probably be best to get whatever type car your friends that can help you at your local track have, and not worry about what car might be the "best"
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Old 03-03-2005, 10:12 AM   #17
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I think the yokomo MR4TC (the version before the MR4SD) had a very similar transmission layout to the 415, so I guess Tamiya wasn't the first out with this idea.

Judging from a quality stand point, my pick would be the X-ray FK05! Once you go X-ray, you'll realize what is good quality and durability.
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Old 03-03-2005, 12:17 PM   #18
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I'll jump in here, hopefully this helps out your decision. By the way I only wish I was good enough to be a team driver, so I'm not being paid to write this.

I went through this decision a few months back before I decided on an RDX. I think we all agree that the transmission layout is similar among the 415, RDX, and X-Ray. If you're considering spending $350+ on a toy car, whoever did it first who cares (but I think the Yokomo MR4TC (Belt Drive) was the first) get the best engineered car for the money.

There are some notable differences when it comes to design.
From a chassis perspective the RDX stands out (in my opinion) by:
-4 rigid aluminum bulkhead pieces that plant the diffs firmly to the chassis, the two rears of which extend probably about a 1/3 the total lenght of the chassis -this makes it really stiff.

-Corally was smart to see that height of the upper deck didn't have to be limited to the height of the motor, rather, it's only slightly higher than the batteries. -don't know how much lower you can go than that!

-the belts run above the upper deck and the diff pulley's are large, so they're free(r) less belt bend = more efficient transmission. i've heard of guys cutting teeth out of belts and pulleys to free it up even more with no harm since the pulley's run 42teeth, that's alot.

-shock in the rear are in front of the rear arms, helps shift weight forward, my car has enormous front steering.

I know on my RDX the weight balance 50/50 is right on, in fact you'll have to add weight to the battery side to get it 50/50

Lastly, maintenace affordability, all four arms are identical as well as both left and right steering blocks. no more having to stock up and a bunch of parts that only work on a specific part of the car, I've been there and done that w/my old Xray. Just stock a pack of arm and a pack of steering blocks and you are set to race. Not sure though about the 415.
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Old 03-03-2005, 07:02 PM   #19
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Quote:
Originally posted by vi3tishduy
HPI has a new TC?
see here. http://www.rcworld.ch/neueprojekte.asp?id=1795
see how the batts are inset more than the other "like" layouts? im liking that. well the motor isnt inset as like the my02 or fk05 but still. and seems that being able to change diffs from above the bulkheads is gonna become the standard. steering looks like the xray's. unlike the twin ones hpi has been using for a while i think. and look at the front bulkheads. is it just me that gets reminded of the xray fk bulkheads? and upper deck is pretty low too. with the rear bulkheads extending pretty far forwards may be quite stiff. i think hpi may be coming back with a great belt car again.
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Old 03-03-2005, 07:07 PM   #20
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Quote:
Originally posted by Cole Trickle
An old saying, but yet very true. Oh, and check my signature
Your sig is right but I'm still gettin' the new Yoke BD... ...

- JB
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Old 03-03-2005, 07:12 PM   #21
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The Xray FK04 is a prime example of 50/50 balance. And if Corally can get the electronics side heavier than the batts, more power too them.

The HB/HPI car uses almost identical suspension as the Pro4. The arms, pins,hex hubs, chubs, blocks, shocks, turnbuckles, ect....
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Old 03-03-2005, 07:21 PM   #22
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Quote:
Originally posted by Electro-MAX RC
I'll jump in here, hopefully this helps out your decision. By the way I only wish I was good enough to be a team driver, so I'm not being paid to write this.

I went through this decision a few months back before I decided on an RDX. I think we all agree that the transmission layout is similar among the 415, RDX, and X-Ray. If you're considering spending $350+ on a toy car, whoever did it first who cares (but I think the Yokomo MR4TC (Belt Drive) was the first) get the best engineered car for the money.

There are some notable differences when it comes to design.
From a chassis perspective the RDX stands out (in my opinion) by:
-4 rigid aluminum bulkhead pieces that plant the diffs firmly to the chassis, the two rears of which extend probably about a 1/3 the total lenght of the chassis -this makes it really stiff.

-Corally was smart to see that height of the upper deck didn't have to be limited to the height of the motor, rather, it's only slightly higher than the batteries. -don't know how much lower you can go than that!

-the belts run above the upper deck and the diff pulley's are large, so they're free(r) less belt bend = more efficient transmission. i've heard of guys cutting teeth out of belts and pulleys to free it up even more with no harm since the pulley's run 42teeth, that's alot.

-shock in the rear are in front of the rear arms, helps shift weight forward, my car has enormous front steering.

I know on my RDX the weight balance 50/50 is right on, in fact you'll have to add weight to the battery side to get it 50/50

Lastly, maintenace affordability, all four arms are identical as well as both left and right steering blocks. no more having to stock up and a bunch of parts that only work on a specific part of the car, I've been there and done that w/my old Xray. Just stock a pack of arm and a pack of steering blocks and you are set to race. Not sure though about the 415.
Spot on dude, if I was in a bind with both hands tied behind my back and forced to, I'll sell all my Yoke stuff for the RDX . The car is FRIGGIN TIGHT. Hands down, the next big thing.
(mental note : maybe I should reconsider selling 'some stuff' for the RDX.... NAHH!! )

- JB
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Old 03-03-2005, 08:28 PM   #23
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I have a 415, and though its only been to a couple of races, I could run faster laps with my old box stock TA-04S.

Probably just needs some set-up. But for some reason, I just love the "feel" of the TA-04.

They are all great cars, its just preference.
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Old 03-03-2005, 08:51 PM   #24
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About 8 years ago I had a Yokomo YR4II, maybe that was the first car with this layout.
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Old 03-03-2005, 08:56 PM   #25
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Pro4Capece,

the electronics side of a RDX is heavier than the battery side, with a stock motor its about half an ounce, with a 19 turn, its heavier by about an ounce
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Old 03-04-2005, 06:12 AM   #26
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Quote:
Originally posted by FW05R
I agree the Corally, Hot Bodies, XrayT1FK'05, Yokomo MR4-TC BD were all inspired by the 415 which was a design made in COOPERATION with Tech Racing

So why settle for less than the best get the 415
You'll probably find that the 415 was inspired by the old Yokomo MR4-TC belt drive. This was out long before 415.
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