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Old 05-12-2009, 08:49 PM   #286
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Greetings all,

The spx is an interesting device, but is still troubling me. I recently ran it with a

Duo 13.5 - 0 deg timing
smc 5200 40c
FDR of 5.0
1,7,2,4 settings
motor temp after 6min: 185 F.
spx temp after 6min 140 F.
track temp about 135 f 140 f.

at speedworld this past weekend ( home of the RROC -09). Unfortunately, I was getting motored down the extremely long straight and the car felt soft coming off of the turns. I talked to a few people who also run the same combo but to my dismay they all had very different power settings and FDR's. At this point I'm not sure what to do exactly.

Correct me if i'm wrong, but I think I'm not accessing the dynamic timing everyone is talking about. I think I might be geared too low. I'm thinking of going from a 5.o FDR to a 5.6ish FDR.

any input would be appreciated.

Cheerz

Last edited by Obsidian; 05-12-2009 at 08:59 PM.
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Old 05-12-2009, 10:03 PM   #287
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Obsidian...I tend to agree...I ran a fantom17.5 on 0 timing 2teeth(48 pitch)profile 8 ...down on what I ran a novak 17.5 with sphere and found it very soft...went up 1 pinion and 10 degrees timing and it came alive BUT the 3/4 guys with the SPX had such a wide range of rollout it was crazy.Different makes of motor seem to have different rollout needs...still searching for sweet spot with this combo.Have LRP 17.5 coming to trial
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Old 05-12-2009, 10:19 PM   #288
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Quote:
Originally Posted by Obsidian View Post
Greetings all,

The spx is an interesting device, but is still troubling me. I recently ran it with a

Duo 13.5 - 0 deg timing
smc 5200 40c
FDR of 5.0
1,7,2,4 settings
motor temp after 6min: 185 F.
spx temp after 6min 140 F.
track temp about 135 f 140 f.

at speedworld this past weekend ( home of the RROC -09). Unfortunately, I was getting motored down the extremely long straight and the car felt soft coming off of the turns. I talked to a few people who also run the same combo but to my dismay they all had very different power settings and FDR's. At this point I'm not sure what to do exactly.

Correct me if i'm wrong, but I think I'm not accessing the dynamic timing everyone is talking about. I think I might be geared too low. I'm thinking of going from a 5.o FDR to a 5.6ish FDR.

any input would be appreciated.

Cheerz
Maybe your rotor is done. I would try another moter . You have alot of drag break and the track temp was hot..
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Old 05-12-2009, 10:27 PM   #289
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YES drag brake in profile 8 seems to destroy motors
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Old 05-12-2009, 10:35 PM   #290
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Any need to put the heatsink on the SPX, or just a paperweight?
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Old 05-13-2009, 09:34 AM   #291
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Quote:
Originally Posted by Obsidian View Post
Greetings all,

The spx is an interesting device, but is still troubling me. I recently ran it with a

Duo 13.5 - 0 deg timing
smc 5200 40c
FDR of 5.0
1,7,2,4 settings
motor temp after 6min: 185 F.
spx temp after 6min 140 F.
track temp about 135 f 140 f.

at speedworld this past weekend ( home of the RROC -09). Unfortunately, I was getting motored down the extremely long straight and the car felt soft coming off of the turns. I talked to a few people who also run the same combo but to my dismay they all had very different power settings and FDR's. At this point I'm not sure what to do exactly.

Correct me if i'm wrong, but I think I'm not accessing the dynamic timing everyone is talking about. I think I might be geared too low. I'm thinking of going from a 5.o FDR to a 5.6ish FDR.

any input would be appreciated.

Cheerz
If it ran well at first and then fell off I would say too much drag brake. When I last ran up there I ran Profile 8 with the drag brake on 2 geared 5.6 with 10degrees of timing in the motor. I will probably drop down to 5.4 or so and test at the Reedy during practice.
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Old 05-13-2009, 10:28 AM   #292
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Quote:
Originally Posted by Advil View Post
If it ran well at first and then fell off I would say too much drag brake. When I last ran up there I ran Profile 8 with the drag brake on 2 geared 5.6 with 10degrees of timing in the motor. I will probably drop down to 5.4 or so and test at the Reedy during practice.
What sort of ratio's were people running with those same motors and the older LRP speedo's before?

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Quote:
I think I might be geared too low. I'm thinking of going from a 5.o FDR to a 5.6ish FDR.
you meant you have geared too high

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Old 05-13-2009, 02:39 PM   #293
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Quote:
Originally Posted by mark williams View Post
SLOWERONE:

it sounds like you are getting to grips with the spx comp, i will run mine for the first time on saturday at cotwolds (large track)..my FDR ratio with sphere tc was 4.65, full timing,profile 6..last time there, what would you suggest for ratio for the spx comp?

4.65 was 96 spur with 43 pinion..

why do you feel profile 6 with a little motor timing works well, rather than putting it on profile 8 with no timing on motor?
Please remember I am running 12th, not TC. I can't help you with TC ratios, and would defer to Skiddins, who has run TC with the SPX. As regards, the timing question, I prefer the situation where the timing is fixed, and I can predict what the motor can do. I find that a bit of motor timing helps the (12th!) car off the turn, and then the profile 6 seems to add a bit more timing. On the Sphere, where no timing is added by the profile, we used to run all the timing on the motor.

It seems that the dynamic timing works with the TC cars, but not 12th. The biggest difference is weight, so I conclude that if you put some load on the motor (weight of the car) the dynamic timing works OK, but if you don't...

Quote:
Originally Posted by billythekid View Post
If you are using profile 6 with SPX Stock Spec, then you are not taking advantage of its dynamic timing feature. Profile 6 on SPX is equivalent to profile 8 on Sphere TC.
See my point above - do you have a setting that always makes the dynamic timing work well? I'd love to take advantage of it, but can't find a way of doing that in 12th.

Quote:
Originally Posted by Obsidian View Post
Greetings all,

The spx is an interesting device, but is still troubling me. I recently ran it with a

Duo 13.5 - 0 deg timing
smc 5200 40c
FDR of 5.0
1,7,2,4 settings
motor temp after 6min: 185 F.
spx temp after 6min 140 F.
track temp about 135 f 140 f.

at speedworld this past weekend ( home of the RROC -09). Unfortunately, I was getting motored down the extremely long straight and the car felt soft coming off of the turns. I talked to a few people who also run the same combo but to my dismay they all had very different power settings and FDR's. At this point I'm not sure what to do exactly.

Correct me if i'm wrong, but I think I'm not accessing the dynamic timing everyone is talking about. I think I might be geared too low. I'm thinking of going from a 5.o FDR to a 5.6ish FDR.

any input would be appreciated.

Cheerz
I think you are overheating the motor. Brakes on a BL are operated by firing the coils in the motor, so they consume power. You are taking energy out of the car (kinetic energy) when you brake, and it has to go somewhere. In a road car when you brake, you turn the kinetic energy into heat energy. Same in the RC car, but the only place you can generate the heat is in the motor. Take all the drag brake off, stop using the brakes, and I think your motor will perform better through the whole race. HTH
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Old 05-13-2009, 03:24 PM   #294
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Have anyone performed extensive testing with SPX Stock Spec with 13.5T and 17.5T motors from various brands? Which works best with SPX?
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Old 05-13-2009, 05:13 PM   #295
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Quote:
Originally Posted by billythekid View Post
Have anyone performed extensive testing with SPX Stock Spec with 13.5T and 17.5T motors from various brands? Which works best with SPX?
We've managed to 'lose' a few Prince 13.5s

They seem to be the weakest, although they've performed best when they have lasted.

Others have been using Novak SS's and the LRP's.

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Old 05-13-2009, 05:29 PM   #296
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Quote:
Originally Posted by Skiddins View Post
We've managed to 'lose' a few Prince 13.5s

They seem to be the weakest, although they've performed best when they have lasted.

Others have been using Novak SS's and the LRP's.

Skiddins
How about speed passion, are they fast?
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Old 05-13-2009, 07:02 PM   #297
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Quote:
Originally Posted by billythekid View Post
How about speed passion, are they fast?
speedpassion motor quite good...u will not go wrong with it....
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Old 05-14-2009, 02:08 AM   #298
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Quote:
Originally Posted by Skiddins View Post
We've managed to 'lose' a few Prince 13.5s

They seem to be the weakest, although they've performed best when they have lasted.

Others have been using Novak SS's and the LRP's.

Skiddins
Don't forget the GM 13.5 that seems pretty quick to me Skiddily doo daa

The old 13.5 Prince/Speed passion that has no markings on the can, ie 13.5 engraved in white on it, are the very quick ones, and has a rotor with a hell of lot more magnetism, these are silly quick, and you will need to gear down 4 teeth on 64 pitch, but the lesser Prince/Speed Passion that HAVE the 13.5 engraved on the base of the can are no where as quick. I speak from experience on this one

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Old 05-17-2009, 03:12 PM   #299
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Max, the batteries you tested was a 5000mah "20C only" R1wurks batteries. not in the market yet, still making some changes before final production.

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Old 05-18-2009, 08:33 PM   #300
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hi, anyone encounter glitching prolem when using SPX stock with normal FM gun ??? like Helios FM
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