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Old 11-17-2009, 09:18 PM   #856
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i have a duo 2 13.5 with a spx esc...i need to get a fast rollout...someone give me an idea of where to get..i went to texas and they were super super fast..it will be in a 12r5...help me out people...thanks
I was running about 71mm's last weekend @ Mikes, I think I could have went a little higher too.

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Old 11-23-2009, 03:02 AM   #857
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Default LRP SPX with Duo 2 motors ?????

Just obtained a 10.5 and 17.5 duo 2 motors Looking for rollouts in a 1/12th pancar . Also what about timing on the can do i leave it as factory setting. Came with small print out that means nothing to me.
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Old 11-23-2009, 03:40 PM   #858
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Hi guys,

I've just ordered an SPX for use in my tourer racing on carpet with rubber tyres. Track is small and twisty (20m x 12m). Will be using either a Novak 13.5 or a GM 13.5.

Can anyone give me a good starting point for profile and FDR?

Cheers Ears.
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Old 11-24-2009, 01:26 AM   #859
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Hi guys.

Just started in 17.5 and I got a LRP SPX and a LRP X11 17.5. The track is carpet with medium traction. The track is "mixed", but mostly small and twisty.

What would be a good starting point (FDR & Profile)?
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Old 11-24-2009, 02:58 AM   #860
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Hi guys.

Just started in 17.5 and I got a LRP SPX and a LRP X11 17.5. The track is carpet with medium traction. The track is "mixed", but mostly small and twisty.

What would be a good starting point (FDR & Profile)?
There are lots of theory's about gearing the SPX. The best idea is to practice them all.

I used to run Profile 8 and FDR3.45 with my SP17.5 (no timing adjustments), i just tested at the Nationals here in Oz with the Tekin17.5 and ended up with P8, FDR4.77 and about 5degrees of timing added into the motor.

You need to get a motor with adjustable timing to maximise the SPX, that way you can really use the Turbo function. The lower FDR (4.77) allows more torque in the infield, but the turbo in the SPX allows for the top speeds down the straight.

Just test them all (5.0/4.75/4.5/4.25/4/3.75/3.5), keep an eye in times, temps and top speeds and you will know whats best for your car, and for you.

Ben
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Old 11-24-2009, 10:21 AM   #861
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nimh mode, settings will most likely be 2-8-1-1.
there is a lipo cutoff but for 2s 7.4v only, that's why you have to run the 1s 3.7v in nimh mode.
So are you saying for 1S LiPO I can remove my Novak Booster, set the SPX to NIMH mode for cutoff and run a receiver pack to power the servo and receiver?
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Old 11-24-2009, 10:30 AM   #862
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So are you saying for 1S LiPO I can remove my Novak Booster, set the SPX to NIMH mode for cutoff and run a receiver pack to power the servo and receiver?
yes but there will be no cutoff. that's how my car is done. you will run the car this way regardless if you have a booster or receiver pack.
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Old 11-24-2009, 10:45 AM   #863
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yes but there will be no cutoff. that's how my car is done. you will run the car this way regardless if you have a booster or receiver pack.
Gotcha. I had no idea I had to run it on setting 2 due to the 2S cutoff in setting 1. The thing is, I've run it a few times in setting 1 and didn't have the cutoff occur?!?!
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Old 11-24-2009, 12:15 PM   #864
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Having some issues with motor temps at the moment. Track has a 25m straight and a technical infield, but quite flowing.

Motor is a Tekin 13.5turn, profile 7, no drag brake. Motor is coming off at 80-90 degrees C, which is apparently a little bit on the hot side.

Geared at 6. Now, I take it going higher to say 6.5 should drop the temps a little ?
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Old 11-24-2009, 12:18 PM   #865
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What about the ESC? Is that "hot" also?
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Old 11-24-2009, 12:20 PM   #866
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What about the ESC? Is that "hot" also?
Nope, can quite happily stick my finger on it and hold it there, unlike the motor.
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Old 11-24-2009, 02:36 PM   #867
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As far as I know (new to electric though):
If only the motor is hot, it is undergeared. Put on a bigger pinion or smaller spur.
If the entire system is hot, it is overgeared. Put on a smaller pinion or bigger spur.

Please correct me if I am wrong. I am new to electric - just got told the above mentioned.
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Old 11-26-2009, 03:47 AM   #868
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Need a little help with gearing. Changed to an SPX from a TC Spec and i think my car went slower lol, running a 17.5 DUO 1. The track i run on is fairly tight but with a 30-35m straight. With tracks like this have people found it better to go with a lower ratio eg: 3.4 with no timing and say a profile 6 or 7 or go for a higher ratio say 4.7 with mechanical timing on the motor, say 10 degrees and a profile 8?

I was getting motored hard down the straights by the other cars, they would pick up at least 5-8m on me down the straight.
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Old 11-26-2009, 04:41 AM   #869
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Hi guys,

I've just ordered an SPX for use in my tourer racing on carpet with rubber tyres. Track is small and twisty (20m x 12m). Will be using either a Novak 13.5 or a GM 13.5.

Can anyone give me a good starting point for profile and FDR?

Cheers Ears.
Hi Jonboy

Your seem to be running a very similar setup to me. My local indoor track is 22m x 10 and I run the spx with a 13.5 gm.

I set it up as fdr 9.1 profile 7 and two lines of timing added on the motor and it is very quick

I was running in the same heat as a very good driver running a 10.5 and he said down the straight there was practially nothing between his and mine!!

So that would be my advice.

Ade
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Old 11-26-2009, 05:43 AM   #870
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Originally Posted by Fast XXXS View Post
Need a little help with gearing. Changed to an SPX from a TC Spec and i think my car went slower lol, running a 17.5 DUO 1. The track i run on is fairly tight but with a 30-35m straight. With tracks like this have people found it better to go with a lower ratio eg: 3.4 with no timing and say a profile 6 or 7 or go for a higher ratio say 4.7 with mechanical timing on the motor, say 10 degrees and a profile 8?

I was getting motored hard down the straights by the other cars, they would pick up at least 5-8m on me down the straight.
Ok. Try this : profile 8. Middle hole on motor . Start at 44mm roll-out and go up from there ,if you need to.
You probably won't go above 48mm.
I run indoors,surfaced concrete,good traction. @ 45mm.

If you're overgeared, you might not be winding out early enough. You should have good top speed and annihilate the others from apex to apex.
Also, your battery needs to be nice and fresh to get the best from the said combo.
I thought my packs were ok,until I bought a new one.....wow !!

HTH.
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