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Old 03-23-2009, 09:01 AM   #16
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This weekend I ran my new LRP SPX with an LRP 17.5 Stock 1/12 racing, and it felt slower than my LRP Sphere Comp.

I was running an 83.5mm rollout on the Sphere Comp. Started the SPX with a 81.8mm rollout on Profile 6. Changed to profile 7 and dropped the rollout to 80mm and left if there for the day. The change from 83.5 to 80mm was only a 2-tooth drop on the pinion.

Question - On profile 7 with the SPX, should I be dropping the rollout even more?
I dropped from a 3.50-3.60 Rollout to a 3.15 in `12th with the SPX.

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Old 03-23-2009, 09:12 AM   #17
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my questions is: if the spx profile 8 we gear down compared to comp07 profile 8 does that mean that the spx has more topside rpm?

for 1/12 scale 17.5 how would you guys set a duo and a novak? As little motor timing as possible?

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Old 03-23-2009, 10:14 AM   #18
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Which is better, increasing the profile number or dropping a tooth or two on the pinion gear?
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Old 03-23-2009, 10:17 AM   #19
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I dropped from a 3.50-3.60 Rollout to a 3.15 in `12th with the SPX.

EA
That is a huge drop. Going from a 91.4mm (3.60") rollout to an 80mm (3.15") would be a 6-tooth drop. I will use this info and test it out on the track next weekend.
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Old 03-23-2009, 12:49 PM   #20
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Which is better, increasing the profile number or dropping a tooth or two on the pinion gear?
Just to bump the thread

Need an answer too...
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Old 03-23-2009, 01:35 PM   #21
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increasing profile....if it was dropping pinions all the esc's would be just as fast as the spx...
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Old 03-23-2009, 01:54 PM   #22
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Which is better, increasing the profile number or dropping a tooth or two on the pinion gear?
I think these would go hand-in-hand depending on the profile you are using on the SPX.

Profiles 7 and 8 have a very noticeable rpm increase on the motor, but the only way to take advantage of it would be with fewer teeth on the pinion (lower rollout), allowing the rpm to increase.

So increasing the profile would be the ticket, but you can't take advantage of the higher profiles w/o lowering the pinion teeth.
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Old 03-23-2009, 06:07 PM   #23
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For anything below 10.5 I believe most are running profile 7. But it depends on driving style, class and track size. Nobody reconnmends profile 8 FWIW. Way to much RPM!

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Old 03-23-2009, 09:41 PM   #24
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Friends with SPX Competition Stock Spec speed controls...

1) Set punch to 8 with zero advance on the motor.
2) Turn on radio and car
3) Hold car up with no load
4) Go full throttle...for as long as you dare...to experience what revs the SPX is capable of doing. On my cars, it is totally scary!!!

After doing this a couple times, I was satisfied that the 8 punch setting on the SPX produces far more revs than I have ever experienced with my several other Spheres...for 17.5 and 13.5 stock motors. The revs were so excessive, my rubber and foam tires have actually been coming unglued from the wheels.

To take advantage of these revs, I am currently geared down 2-3 teeth on my pinions.

I do not see any significant difference in using any of the other punch settings on my SPXs. They seem to mimic my TC and 2007 ESCs. Setting 8 on the SPX is pure gold!

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Old 03-26-2009, 01:17 AM   #25
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Originally Posted by Still Bill View Post
Friends with SPX Competition Stock Spec speed controls...

1) Set punch to 8 with zero advance on the motor.
2) Turn on radio and car
3) Hold car up with no load
4) Go full throttle...for as long as you dare...to experience what revs the SPX is capable of doing. On my cars, it is totally scary!!!

After doing this a couple times, I was satisfied that the 8 punch setting on the SPX produces far more revs than I have ever experienced with my several other Spheres...for 17.5 and 13.5 stock motors. The revs were so excessive, my rubber and foam tires have actually been coming unglued from the wheels.



To take advantage of these revs, I am currently geared down 2-3 teeth on my pinions.

I do not see any significant difference in using any of the other punch settings on my SPXs. They seem to mimic my TC and 2007 ESCs. Setting 8 on the SPX is pure gold!

Bill
Won't reving the motor with no load hurt the motor? I set my ESC to 7 just to be on the safe side!
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Old 03-26-2009, 07:38 AM   #26
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That old trick where you hold the brakes for 5 seconds to get a "boost" on your next launch? It appears to be no joke on this ESC. It must spin the motor up a 3x the RPMs. It'll be interesting to see how it feels on the track.
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Old 03-26-2009, 11:16 AM   #27
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That old trick where you hold the brakes for 5 seconds to get a "boost" on your next launch? It appears to be no joke on this ESC. It must spin the motor up a 3x the RPMs. It'll be interesting to see how it feels on the track.
Is there any indicator when the "Launch Control" feature is activated ?

I cant seem to tell whether i have activated it or not as there isnt seem to be any obvious lights blinking to indicate whether it is on or off....
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Old 03-26-2009, 06:31 PM   #28
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Am trying to wire an SPX to a Novak 21.5 and don't know what wires go where. The red and black I figured out. But to what positions on the motor (A, B, or C) do the blue, yellow, and orange wire connect to?
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Old 03-26-2009, 09:14 PM   #29
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Quote:
Originally Posted by Stuart Pid View Post
Am trying to wire an SPX to a Novak 21.5 and don't know what wires go where. The red and black I figured out. But to what positions on the motor (A, B, or C) do the blue, yellow, and orange wire connect to?
BLUE=A
YELLOW= B
ORANGE=C
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Old 03-26-2009, 09:40 PM   #30
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And if you are able to place the LRP BL ESC on your TC chassis with the wire connections facing towards the motor (rearward), you can cut them (Blue shortest/Yellow mid/Orange longest) to help you remember the order of how they should attach to your BL motor.

Helps with quick motor changes...

Bill
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