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Old 07-19-2012, 04:29 AM   #3541
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Craig
started to build the new 417X using the blog is working a treat so far
trying to work out gearing for stock (17.5) at sma, does 75, spur, 25pinion giving a fdr of 5.841, does that sound okay or to high/low for a tamiya
Hey mate at our local track up here we are starting at a 3.5 fdr for 17.5, I'm running 48p, 65 spur - 36 pinion. I find it is on pace
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Old 07-19-2012, 04:32 AM   #3542
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Anyone have or know of a good setup for tamiya b3 tires and an nsx body
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Old 07-19-2012, 05:07 AM   #3543
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Hey mate at our local track up here we are starting at a 3.5 fdr for 17.5, I'm running 48p, 65 spur - 36 pinion. I find it is on pace
17.5 is boosted in Australia
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Old 07-19-2012, 05:19 AM   #3544
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Craig
started to build the new 417X using the blog is working a treat so far
trying to work out gearing for stock (17.5) at sma, does 75, spur, 25pinion giving a fdr of 5.841, does that sound okay or to high/low for a tamiya
It sounds to high to me. I would first check with your motor manufactures recommendations, then start stepping up from there. I run a 17.5 LRP X12 in mine. Manufacture recommends FDR of 4.0 and I'm getting most success with a fdr of 3.82 or 3.89 (depends on track).
I'm using 64p gearing - Spur 96, Pinion 49 (fdr 3.82) or 48 (fdr 3.89).

In 21.5 (hobbywing) I'm using fdr 3.5. 64p pinion 49, spur 88
Both classes I'm running in Blinky.

Good luck,
Hope this helps.
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Old 07-19-2012, 06:03 AM   #3545
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Originally Posted by hlucn8r View Post
Hey mate at our local track up here we are starting at a 3.5 fdr for 17.5, I'm running 48p, 65 spur - 36 pinion. I find it is on pace
Which track is that? What are the approximate dimensions? I'm guessing outdoor...

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17.5 is boosted in Australia
Craig, it is for AARCMCC classes, but there are some variations between states as 17.5 blinky seems common in QLD and that's what they're going to run for their State Titles.

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It sounds to high to me. I would first check with your motor manufactures recommendations, then start stepping up from there. I run a 17.5 LRP X12 in mine. Manufacture recommends FDR of 4.0 and I'm getting most success with a fdr of 3.82 or 3.89 (depends on track).
I'm using 64p gearing - Spur 96, Pinion 49 (fdr 3.82) or 48 (fdr 3.89).

In 21.5 (hobbywing) I'm using fdr 3.5. 64p pinion 49, spur 88
Both classes I'm running in Blinky.
Somewhere in the high 3's would be reasonable for blinky 17.5, depending on track size and layout.

At SMA (and elsewhere that runs AARCMCC 17.5), we run boosted 17.5.

Matt - the biggest factor in gearing for stock is your motor and ESC. There are guys who run close to 5.0 and guys who run over 6.0. Your "style" on the throttle starts to play a big part in the picture, because often the guys running lower FDRs are probably better on throttle control, so heat is less of an issue. If you combine lower FDRs with aggressive boost/turbo and tend to mash the throttle, you'll smoke the motor pretty quickly. Quite a few went up at the ACT Indoor Titles last weekend due to the extra strain that the higher grip puts on the motor. A lot of people throw too much timing too early at the motor and all it does it get hot. Quickly.

Also, some motors like to spin fast, so you gear 'em shorter. I ran an FDR of around 6.2 at Whalan last year and the darn thing was still accelerating at the end of the straight. That was with a Fanton Ion 3 and Tekin RS and it didn't get hot The Hobbywing speedies tend to work better with lower FDR's than the Tekin.

What motor/ESC are you thinking of running? Once you know, go hit up the guys who run that combo. In a couple of weeks, I'll be making the switch too and starting with the Ion 3/TekinRS set. I'm thinking around the 6 mark, FWIW.

Needless to say, I won't be one of the quick guys
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Old 07-19-2012, 06:12 AM   #3546
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In 21.5 (hobbywing) I'm using fdr 3.5. 64p pinion 49, spur 88
Both classes I'm running in Blinky.
Sorry, I meant to check something here. For 21.5, are you running a Hobbywing motor? It's interesting that the bulk of guys locally are running FDR's in the 2.9 range for 21.5 blinky and getting good results, but that's with motors that are definitely on the "torquey" side. My Orion Vortex VST has worked a treat at around 2.85, but is starting to fall apart, so I'm contemplating new motor options.
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Old 07-19-2012, 02:26 PM   #3547
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Phil
am going to be running a reedy sonic and hobbywing 120A V2.1 (bought from Steve). I wont be running with the stock guys, going to finish the build, then try to learn the intricacies of stock for a couple of months and practice a fair bit. Am still putting all attentions to the 21.5 at the moment (as its slowly paying off).
Think i will aim for 6 to start with and work my way from there. I dont think anyones running a reedy in stock at the moment, will check on Tuesday night.

Thanks everyone for their help
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Old 07-19-2012, 06:05 PM   #3548
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Thats right here in Qld we run 17.5 blinky, I run the 3.5 fdr at most tracks up here Fraser Coast, sunshine Coast, Bayside and at Logan.
Yes all outdoor.
When I first started racing about 3 years ago we were running 17.5 boosted then it changed to blinky. I have not yet raced in other states.
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Old 07-19-2012, 09:07 PM   #3549
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Just a heads up Phil and Matt. Id gear between 5.5 & 6 fdr for SMA with that motor combo. Im interested to see how the Reedy motor goes in stock.
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Old 07-20-2012, 01:10 AM   #3550
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Just a heads up Phil and Matt. Id gear between 5.5 & 6 fdr for SMA with that motor combo. Im interested to see how the Reedy motor goes in stock.
Don't die wondering
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Old 07-20-2012, 01:48 AM   #3551
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Just a heads up Phil and Matt. Id gear between 5.5 & 6 fdr for SMA with that motor combo. Im interested to see how the Reedy motor goes in stock.
Im going to start at 6 and get used to driving it, then work way down i reackon. I don't want to get to cocksure and drive the new trf417x into the fence (to often).
Probably going to be months yet before i stick it in a Tuesday night stock race anyways.
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Old 07-20-2012, 05:31 AM   #3552
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From my extremely limited experience I think the reedy motors like an extra tooth or two. I'd start at 5.5
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Old 07-20-2012, 05:38 AM   #3553
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From my extremely limited experience I think the reedy motors like an extra tooth or two. I'd start at 5.5
cheers Craig
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Old 07-20-2012, 06:10 PM   #3554
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Probably an easily answered question but i have no idea.

With the 51472 Sep suspension mounts, why does it have 1XA and 1A stamped/printed on the mount?
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Old 07-20-2012, 06:13 PM   #3555
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Probably an easily answered question but i have no idea.

With the 51472 Sep suspension mounts, why does it have 1XA and 1A stamped/printed on the mount?
Because these mounts can be either 1a or 1xa based on which way you install them. The setting you want goes towards the center of the car.
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