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Old 01-11-2010, 02:40 PM   #181
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thanks sean, i will try higher FDR guess that means i need new spurs, otherwise might be some work to fit a 5.5 with a 96 64p Spur
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Old 01-15-2010, 03:08 AM   #182
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So tried running 5.5 fdr with the 17.5 in a TC5 and I must be missing something because there was no speed? Car felt topped out at 15ft down the straight... oh well more tinkering tomorrow i guess. Wont running 4 dot (-10) and those High FDR make the motor top out even faster? I think i am a little confused with this whole thing
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Old 01-15-2010, 06:13 AM   #183
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Advance the timing more (almost full) with gearing like that.
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Old 01-15-2010, 10:22 AM   #184
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I'm running a 6.88 fdr with -10, 4 dot, in the motor and 30 deg in my MMP on a 100 x 36 track. Comes off 160'ish' with plenty of rip. What I like is that the car feels like an 'old' brushed motor when you let off the throttle, no need for drag brake. Track was technical. Layout changed so I'm interested to see what it feels like now ...
(BTW, 17.5 rubber)
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Old 01-15-2010, 01:00 PM   #185
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ok so with no ability to adjust timing on esc and without the spec profiles... i am guessing to try the 4 dot and work with a lower FDR?
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Old 01-15-2010, 02:40 PM   #186
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ok so with no ability to adjust timing on esc and without the spec profiles... i am guessing to try the 4 dot and work with a lower FDR?
You could try that but I don't think that will get you were you want to be. The 4-dot timing will retard the timing, which works great with advance timing speedos, but in your situation, you don't have one.

You've already tried the 1-dot timing?

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Old 01-16-2010, 02:20 AM   #187
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You could try that but I don't think that will get you were you want to be. The 4-dot timing will retard the timing, which works great with advance timing speedos, but in your situation, you don't have one.

You've already tried the 1-dot timing?
broke down and borrowed an spx and the motor did real well on the 4dot on profile 7. just to understand why, why do we retard the timing on the motor only to advance it on the esc's?
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Old 01-16-2010, 04:41 AM   #188
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broke down and borrowed an spx and the motor did real well on the 4dot on profile 7. just to understand why, why do we retard the timing on the motor only to advance it on the esc's?
4-dot and profile 7 is what I run. To answer your question, the motor has alot of timing built into it already with the stock setting of 2-dot...too much timing to run with profile 7. So, you have to retard the timing to bring the timing back to say, what a normal motor would have.
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Old 01-20-2010, 05:45 AM   #189
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guys, i ran an X12 10.5t and nothing i did with gearing could get the motor to run cool. SPX profile 7, 4dot motor insert, gearing changed from 6.5 to 8.5 never ran cooler than 100C (210F). The rotor has gone soft now but for the first few runs it was a weapon. gearing @ 8.5 is what i run for 4.5t mod so i have no idea how to make this motor run cooler on profile 7. air temp 20C (cool).

track is smallish, straight approx 80ft.

anyone else tried the X12 10.5t?
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Old 01-20-2010, 06:10 AM   #190
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ok i just read the instructions recommending not to use profile 7 or 8, LOL!!

seems illogical, release new motors called stock spec that cannot use the primary "stock spec" feature of the SPX speedy? How does this work on a larger track with longer straights?
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Old 01-20-2010, 04:22 PM   #191
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Just gear it to suit.
Then if your still missing straight line speed, go to +10 timing.
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Old 01-20-2010, 04:39 PM   #192
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ok i just read the instructions recommending not to use profile 7 or 8, LOL!!

seems illogical, release new motors called stock spec that cannot use the primary "stock spec" feature of the SPX speedy? How does this work on a larger track with longer straights?
I know it sounds weird But it's due to the fact the the new X12 motor series were developed after the SPX speedo. And the X12 were designed to be optimized with the SXX speedo's (originally the standard SXX or the TC). Therefore it's not optimized for the SPX, that's why you should not use profile 7 or 8 on the old speedos. But with the new SXX St. Spec you can just turn it up to the higher profiles and rocket away again
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Old 01-20-2010, 04:48 PM   #193
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But with the new SXX St. Spec you can just turn it up to the higher profiles and rocket away again

Now.. THAT is what I wanted to hear! Now.. if they get here tomorrow in the USA... now THAT would make my day!
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Old 01-20-2010, 05:27 PM   #194
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I know it sounds weird But it's due to the fact the the new X12 motor series were developed after the SPX speedo. And the X12 were designed to be optimized with the SXX speedo's (originally the standard SXX or the TC). Therefore it's not optimized for the SPX, that's why you should not use profile 7 or 8 on the old speedos. But with the new SXX St. Spec you can just turn it up to the higher profiles and rocket away again
i will give this a try with my SXX TC spec. One thing you can really notice with these X12's is just how strong the magnets are compared to say a SP v3.0 motor. they cog with quite a lot more force when you turn by hand. Now all i need is a new rotor that isn't toasted

thanks for the advice!

I gotta admit, if you want a motor for mains or big race, the X12 on profile 7 geared to the moon is an absolute WEAPON. Just don't touch it after the race...
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Old 01-21-2010, 08:22 PM   #195
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Could anybody tell me, is possible to be little bit cooler if run the X12 13.5 with negative timing?
I don't mind run negative timing, in fact i will using run with coming soon SXX stock spec then i will probably run the X12 with 12mm rotor, in fact our race rules has to restriction in any modification of the motor.

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