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Old 08-23-2009, 01:29 PM   #601
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I use an 8.5 with mine all the time. I think they just don't recommend using the timing adjust feature past 10.5
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Old 08-23-2009, 01:32 PM   #602
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i run my 13.5 lipo with an SPX at 4.11 and it flys

motor is never over 70 degrees C and the speedo is 39 degrees

i have heard the top guys here run 3.75 on some of the longer straight circuits but they cook them !!!
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Old 08-30-2009, 06:06 PM   #603
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Anyone tried one of these speedies with a Losi 17.5? I have hit the wall with similar top end speed on profiles 7 and 8 with gearing between 3.9 and 5.2. NOrmal TC SPEC users are gearing at around 3.5 but im not game to go there on profile 7 or 8. Punch out of the corners is quiet different but the top speed thing is puzzling me. If i switch it back to profile 6 on these gearing's there is a noticeable drop in top speed and punch out of corners is similar to the higher profiles. Very strange. I have not bumped the timing at all on this motor in fear of blowing it up but maybe this is the bit im missing. Any advice appreciated, Benzaah...
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Old 08-30-2009, 11:44 PM   #604
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Quote:
Originally Posted by sidecarphil1 View Post
i run my 13.5 lipo with an SPX at 4.11 and it flys

motor is never over 70 degrees C and the speedo is 39 degrees

i have heard the top guys here run 3.75 on some of the longer straight circuits but they cook them !!!
Not near enough info in your post (i.e. motor timing, ESCprofile, etc.) to give you any advise. But, what you have supplied is likely off base from getting the performance your SPX can deliver. I am not familiar with GM motors but someone will be.

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Old 08-31-2009, 10:28 AM   #605
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motor is fixed timing so not timed

punch profile 7

lipo cut off not used

no drag brake

no initial brake

there is no other settings in the speedo

my gearing is 96/48 on a TRF416WE transmision ratio of 2.0556:1

giving me a final drive of 4.11:1

my DX3S is set to 100% throttle travel anf 70% brake travel because i am agressave on the brakes and i over brake if it is set higher

if you need any more info then please ask

the GM is better than the LRP motor
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Old 08-31-2009, 04:20 PM   #606
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Ok, quick question. If I'm am going to run 17.5 sedan which speedo should I run(SPX or SXX)? Also I will be running a Trinity 17.5 Duo.
Dave
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Old 08-31-2009, 05:37 PM   #607
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Originally Posted by dragracer72nova View Post
Ok, quick question. If I'm am going to run 17.5 sedan which speedo should I run(SPX or SXX)? Also I will be running a Trinity 17.5 Duo.
Dave
the spx is for stock . the 17.5 duo works good in the motor profile 7 or 8
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Old 08-31-2009, 06:03 PM   #608
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Default 12r5 1 cell lipo

is there anyone out there running one cell lipo with spx and orion 13.5...if so could you give me an idea of where i should be on rollout..the track is 70x30..has more turns than a subdivision...i am looking for profile information and so forth..anything that can get me in the ball park..and it is carpet...thanks in advance...
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Old 08-31-2009, 06:52 PM   #609
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Thank you rack for the info!
That's what I will be ordering!
Dave
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Old 09-01-2009, 08:36 PM   #610
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I think I finally found the sweet spot for my 17.5 SP Ultrasportsman on the SPX. With a SMC lipo, I'm running a 4.07 FDR on profile seven and it comes off the track in six minutes at about 155 F in ~90 F ambient temps. I've found that any small deviation in profile or gearing makes the motor feel quite weak or overheat. The brakes have always been excellent with this speed control and motor combo. I've already ordered a Novak 17.5 though, and I guess I have to do a comparison.

I use the same electronics for my 13.5 car, except the motor of course, which is a Novak 13.5SS. The FDR I am using is 6.1 on profile seven and the motor temps about the same as my SP 17.5 after six minutes. I'm going to try gearing a tooth down soon; that should be about perfect for our track as I may need a slight bit more punch coming off the last corner and going into the straight. The brakes on the Novak aren't as good as the SP, but overall I feel that it is a better motor that isn't so finicky with FDR, power profile, and temps.

I have no regrets about going with the SPX and I've been recommending this speed control because of it's performance, cost, and ease of use. The other "new generation" speedos are great too, but I don't think that the SPX should be counted out just because of a lack of software updates. For me, the SPX has proven to me its worthiness in a field with KOs and Tekins.
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Old 09-01-2009, 10:03 PM   #611
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Quote:
Originally Posted by JayL View Post
same track, same tires same duo 13.5, clean inside,
one car tamiya 415 w/smc 5200 40c
one car cyclone w/ orion 3800 30c
both running profile 8 6.0fdr middle hole on duo

tamiya 150 degrees

cyclone 200 degrees

running same lap times

any ideas why?


we took the cyclone to 5.7 and it went to 215...
Gearing is so subjective these days with all this timing. I've found a number of different things that will affect temp greatly.

1. Front drive. My friends run diffs, I run a spool. They're considerably cooler with the same gearing.
2. Driving style. If I'm pushing hard in practice to click off fast laps, the motor gets much hotter than in a race when I'm driving with a little more sanity.
3. Airflow within the car.*
4. Drivetrain friction.
5. Middle hole isn't the exact same timing from one DUO to the next.
6. Rotor strength. A weaker rotor that's seen a few 200+ heat cycles will pretty much always run hot. Stronger rotors = cooler motors.


* Because I see such a wide swing in temps with these new ESC's, I've started running a fan on my motor. r1wurks makes a nice fan mount (I hope he makes one for a single fan, maybe even 30mm) that seems to lower the temp on my motors 30-40 degrees when used in conjunction with the Muchmore high RPM fan. I'm a believer. My motors don't fade, and I can gear them up (and get more speed) without cooking them.
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Old 09-01-2009, 10:43 PM   #612
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Quote:
Originally Posted by syndr0me View Post
Gearing is so subjective these days with all this timing. I've found a number of different things that will affect temp greatly.

1. Front drive. My friends run diffs, I run a spool. They're considerably cooler with the same gearing.
2. Driving style. If I'm pushing hard in practice to click off fast laps, the motor gets much hotter than in a race when I'm driving with a little more sanity.
3. Airflow within the car.*
4. Drivetrain friction.
5. Middle hole isn't the exact same timing from one DUO to the next.
6. Rotor strength. A weaker rotor that's seen a few 200+ heat cycles will pretty much always run hot. Stronger rotors = cooler motors.


* Because I see such a wide swing in temps with these new ESC's, I've started running a fan on my motor. r1wurks makes a nice fan mount (I hope he makes one for a single fan, maybe even 30mm) that seems to lower the temp on my motors 30-40 degrees when used in conjunction with the Muchmore high RPM fan. I'm a believer. My motors don't fade, and I can gear them up (and get more speed) without cooking them.
Great ideas syn...I vote for 4, 6 and 1 in that order. Heavy on the 4.

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Old 09-01-2009, 11:13 PM   #613
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Quote:
Originally Posted by syndr0me View Post
Gearing is so subjective these days with all this timing. I've found a number of different things that will affect temp greatly.

1. Front drive. My friends run diffs, I run a spool. They're considerably cooler with the same gearing.
2. Driving style. If I'm pushing hard in practice to click off fast laps, the motor gets much hotter than in a race when I'm driving with a little more sanity.
3. Airflow within the car.*
4. Drivetrain friction.
5. Middle hole isn't the exact same timing from one DUO to the next.
6. Rotor strength. A weaker rotor that's seen a few 200+ heat cycles will pretty much always run hot. Stronger rotors = cooler motors.


* Because I see such a wide swing in temps with these new ESC's, I've started running a fan on my motor. r1wurks makes a nice fan mount (I hope he makes one for a single fan, maybe even 30mm) that seems to lower the temp on my motors 30-40 degrees when used in conjunction with the Muchmore high RPM fan. I'm a believer. My motors don't fade, and I can gear them up (and get more speed) without cooking them.
im glad you liked our fan mounts.
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Old 09-02-2009, 12:33 AM   #614
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im glad you liked our fan mounts.
fan mounts worked awesome this past weekend at TCS!
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Old 09-02-2009, 10:17 PM   #615
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is there anyone running spx with 13.5 duo2 tc? if you could please help with where to set timing on motor. was running duo middle hole with profile 7. thanks
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