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Old 06-14-2005, 07:25 PM   #2476
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Getting a new kit on the weekend as my first RDX was purchased 2nd hand. Just got few questions:

What spur gear does it come with?
Do the alloy rear shocks extension comes standard? It says on the corallyusa site they are optional parts, just abit confused.
I know the servo saver is not included, are the other bits like joint ball & turnbuckle included to complete the steering system?
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Old 06-14-2005, 07:45 PM   #2477
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Old 06-14-2005, 09:03 PM   #2478
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Quote:
Originally Posted by danjoy25
Getting a new kit on the weekend as my first RDX was purchased 2nd hand. Just got few questions:

What spur gear does it come with?
Do the alloy rear shocks extension comes standard? It says on the corallyusa site they are optional parts, just abit confused.
I know the servo saver is not included, are the other bits like joint ball & turnbuckle included to complete the steering system?
Cannot remember on the spur size. But the rear alloy shock extensions do come standard with the kit. And no a servo saver is not included but all the other stuff to complete the steering linkage is.
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Old 06-14-2005, 09:11 PM   #2479
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i think the kit spur was a 78t 48p, if memory serves.... i went straight to a 100-104 64p.
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Old 06-14-2005, 09:16 PM   #2480
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Quote:
Originally Posted by Turbonium
i think the kit spur was a 78t 48p, if memory serves.... i went straight to a 100-104 64p.
I went straight to a 108 (the largest i could run with the rear sway bar).

On another note, does anyone make the lowered front shock tower yet? I heard that Corally USA was going to offer this...has anyone heard anything?
I have already screwed up one shock tower in a poor attempt to lower it and for round two, I would rather buy a completed one than mess up another brand new one.
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Old 06-15-2005, 12:46 PM   #2481
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The 4mm chassis is beautiful. I'm not sure if I should race it, or touch it inappropriately.

Seriously though, good work, whoever made that thing. It's got some subtle improvements over the design of the original that I'm very fond of, like the increased area for the droop screws.

Our local track is replacing the old carpet with Ozite, so as soon as that's done, I can get to practicing.
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Old 06-15-2005, 04:57 PM   #2482
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This may seem like a strange question, but what is the advantage to running a larger spur/pinion gear? I have heard several theories regarding torque being related to a larger spur gear...Can anyone shed some light on this? I run 64 pitch with a Putnam C2 around 6.00 final drive. The car feels soft through the infield and the motor is right around where it needs to be geared heat wise. Will i get an advantage going to a larger spur than the 108 I am running now? How about a smaller spur/pinion combo? The punch on my Q2 is set all the way to 5 already. Any ideas?
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Old 06-15-2005, 05:38 PM   #2483
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Just got a complete set of bones; they match the part#79182 in the manual but the color of them is different and they say Duraluminum on the package. They're really dark in color . Are the bones in the kit Duraluminum? -JB
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Old 06-15-2005, 05:39 PM   #2484
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where can I get that 3.9mm chassis? -JB
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Old 06-15-2005, 05:40 PM   #2485
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Quote:
Originally Posted by Glowster21
This may seem like a strange question, but what is the advantage to running a larger spur/pinion gear? I have heard several theories regarding torque being related to a larger spur gear...Can anyone shed some light on this? I run 64 pitch with a Putnam C2 around 6.00 final drive. The car feels soft through the infield and the motor is right around where it needs to be geared heat wise. Will i get an advantage going to a larger spur than the 108 I am running now? How about a smaller spur/pinion combo? The punch on my Q2 is set all the way to 5 already. Any ideas?
6.0 gearing......... foam or rubber? how big is the track? Just don't totally rely on temperature to determine gearing.

Theory...... bigger the spur, the more efficient the drivetrain is supposed to be. I'm not fully convinced on this. Offroad guys used to use it to move the motor more forward on the rearend. Not sure how much that much move would make either.

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Old 06-15-2005, 06:35 PM   #2486
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Think of it in physics terms...

Torque (T) = Force (F) x Radius (R)

If R is increased, the force needed to have the same torque is decreased. Thus, the motor does not have to work as hard to do the same thing. Not only does this let the motor run cooler/more efficient, the motor has more punch coming off the corner.

In testing, I have totally confirmed that this works. I went from a 104 to 112 spur during a race day, ran the same rollout, and my laptimes dropped .1 -.2 seconds per lap, no other changes. The motor stayed cooler, as well.
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Old 06-15-2005, 06:37 PM   #2487
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Quote:
Originally Posted by Jeff Brown
6.0 gearing......... foam or rubber? how big is the track? Just don't totally rely on temperature to determine gearing.

Theory...... bigger the spur, the more efficient the drivetrain is supposed to be. I'm not fully convinced on this. Offroad guys used to use it to move the motor more forward on the rearend. Not sure how much that much move would make either.

Jeff
Foam and I run at Hobby Chamber....Still has the long straight from the Nationals and a similar infield. I true my tires to 58mm when new.
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Old 06-15-2005, 06:43 PM   #2488
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Glowster, you should be running around a 1.15-1.2" rollout for that motor...right now you're at 1.195"...which is pretty tall and what I'd use for a pretty open track. What brushes and springs are you using? That could be a very large part of it, too.
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Old 06-15-2005, 07:41 PM   #2489
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Brian,
I'm running Putnam Blue and Green brushes with purple springs...Parma Cyan's on the front woth Magenta's in the rear. I just switched to the 3.9mm chassis.Put in the Carpet Top Deck and it made a HUGE difference in the handling. Can't wait to hit the track tomorrow. What are your thoughts on gearing for a Fantom Quad Mag motor versus the C2 based?
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Old 06-15-2005, 07:46 PM   #2490
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I personally like the Quad mag motor...they don't fall off when they get hot.
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