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Old 07-15-2008, 11:35 PM   #2341
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Default S400

Any local shops around the Socal area that sells this car?
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Old 07-16-2008, 12:12 AM   #2342
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Any local shops around the Socal area that sells this car?
Kamikaze, 1 exit south of BCR at Chapman.
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Old 07-16-2008, 12:39 AM   #2343
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would it be the same fdr of 3.5-3.7 with 48 pitch at those sizes?
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Old 07-16-2008, 12:56 AM   #2344
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closest I can get in my limited time till I need it is (48p) 79 spur and 37 Pinion.. What do you guys think. By my very dodgy calculations it is 4.6fdr.

Keeping in mind im running on foams on a tight carpet track, do you think this will do?
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Old 07-16-2008, 01:43 AM   #2345
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http://www.rcracing.com/Gear_Ratio_Program_1100.cfm

I dont think you'll keep up if the other 17.5's run 3.7 and you 4.6, you can always try.

I would ask the guys there wich ratio they run first.
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Old 07-16-2008, 01:56 AM   #2346
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Commander,

You will be running the ACT titles this weekend rite?

Well if this helps for 27t brushed stock atm here on our track we use a rollout of 26-28mm. This may help you to find your ratio for 17.5
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Old 07-16-2008, 02:50 AM   #2347
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hey dude, thanks for that. BTW though, what is the diameter of tire you are using to get that?
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Old 07-16-2008, 02:52 AM   #2348
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hey dude, thanks for that. BTW though, what is the diameter of tire you are using to get that?
64mm Foams
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Old 07-16-2008, 06:48 AM   #2349
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closest I can get in my limited time till I need it is (48p) 79 spur and 37 Pinion.. What do you guys think. By my very dodgy calculations it is 4.6fdr.

Keeping in mind im running on foams on a tight carpet track, do you think this will do?
Use a 70T or 72T 48P Spur
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Old 07-16-2008, 09:55 AM   #2350
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64mm Foams
Good start with foams. Experimenting with 34mmx28mm Fronts & 34mmx30mm rear. Trued with conical @ 1deg for camber. work well with technical track.

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Use a 70T or 72T 48P Spur
Why not go with 64p gears!!! It'll run quieter!! just my opinion!!
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Old 07-16-2008, 08:08 PM   #2351
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Default Servo?

I currently have an old Airtronics 94258 on my Schumacher SST Axis. I would like to upgrade it with the intention of moving it (the new servo) to my new car (either a Schumacher M13.5 or a Serpent S400), what do you recommend?
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Old 07-16-2008, 09:55 PM   #2352
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I'm using the Futaba 9550 in my car. I think it's been discontinued but they have a new low profile servo. I think it's the 9551. I'd suggest going with a low profile to keep weight down and you can mount the transponder on the side of servo without it hanging off the side of the chassis.
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Old 07-17-2008, 12:54 AM   #2353
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Quote:
Originally Posted by Mark G. View Post
I currently have an old Airtronics 94258 on my Schumacher SST Axis. I would like to upgrade it with the intention of moving it (the new servo) to my new car (either a Schumacher M13.5 or a Serpent S400), what do you recommend?
Either of those cars can use a standard size servo as well. I do run the low profile servos though as it gives the option of mounting the transponder on the side of the servo, but as of late I've had glitching problems every time I try that.

And of course, I recommend the S400 for your choice of car
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Old 07-17-2008, 07:37 PM   #2354
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Default Servo?

Okay, I did some checking, my older Airtronics is not digital but the spec's are
145 oz. torque
.09 speed

Your Futaba is digital
115 oz. torque
.06 speed

The recommended Airtronics 94358 is digital and the profile is the same as my original but a tad slower (lower number meaning faster).
145 oz. torque
.10 speed

What is more important here? Based on the info. above my original has more torque then the recommended and the Futaba. The original has more torque and is faster then the digital recommended and has more torque but less speed then the Futaba. Does digital really make that much of a difference?
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Old 07-17-2008, 11:12 PM   #2355
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Digital servos are more accurate. They center themselves faster and more often so they're more consistent. Any servo over 100 oz of torque and under .11 speed should be just fine.
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