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Old 09-28-2009, 01:10 PM   #691
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Originally Posted by sidecarphil1 View Post
it is all about the gearing and your driving with the SPX

i am slower in a straight line than the other stock speedos at the end of the straight but through the infield i have the legs on them out of the corners

i also have found the Speed Passion motors slower then the other makes

my 10.5 SP motor is with lipo was slower then my GM 13.5 with lipo

they are poop completly , LRP or GM are the best i have found

It sounds like your gearing for the SP / SPX are way off. There is no way the SP motor runs much slower than LRP X11. Also, SPX is known for its second gear effect, which should be geared for it to kicked in half way down the straight away. There is no way for the SPX to be slower at the top end as compared to other stock ESC. How long is your straight away?

Try different gearings and see if you could hit the sweet spot.
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Old 09-28-2009, 01:12 PM   #692
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Here are a couple examples.

for 13.5 touring...

My setup: SPX profile 7, Speed Passion V2, fixed timing, 4.40 final
Friend 1: Tekin RS, Novak SS, timing advanced, 5.4 final
Friend 2: SPX profile 8, Trinity Duo2, timing advanced, 6.2 final
Friend 3: Speed Passion GT2.0, Novak SS, stock timing, 4.6 final

All 4 cars are just about even on the straight away, and similar rip out of the corners.
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Old 09-28-2009, 01:18 PM   #693
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Originally Posted by billythekid View Post
It sounds like your gearing for the SP / SPX are way off. There is no way the SP motor runs much slower than LRP X11. Also, SPX is known for its second gear effect, which should be geared for it to kicked in half way down the straight away. There is no way for the SPX to be slower at the top end as compared to other stock ESC. How long is your straight away?

Try different gearings and see if you could hit the sweet spot.
i have the "sweet spot " with my GM 13.5 of 4.1 , i tried every gearing and that IS the quickest , i ment the "stock spec" speedos

i tried for weeks to get the dam 10.5 to spin and it wouldnt !!!

our straight is 70 meters long

ignore the 1:5 noisey thing !!!

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ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
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Old 09-28-2009, 01:19 PM   #694
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Originally Posted by M-Technic View Post
Here are a couple examples.

for 13.5 touring...

My setup: SPX profile 7, Speed Passion V2, fixed timing, 4.40 final
Friend 1: Tekin RS, Novak SS, timing advanced, 5.4 final
Friend 2: SPX profile 8, Trinity Duo2, timing advanced, 6.2 final
Friend 3: Speed Passion GT2.0, Novak SS, stock timing, 4.6 final

All 4 cars are just about even on the straight away, and similar rip out of the corners.
that is a differance WOW
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Old 09-28-2009, 01:48 PM   #695
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Originally Posted by sidecarphil1 View Post
i have the "sweet spot " with my GM 13.5 of 4.1 , i tried every gearing and that IS the quickest , i ment the "stock spec" speedos

i tried for weeks to get the dam 10.5 to spin and it wouldnt !!!

our straight is 70 meters long

ignore the 1:5 noisey thing !!!

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
What battery packs are you using?
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Old 09-28-2009, 02:08 PM   #696
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What battery packs are you using?
i use the Track Power 4000 lipos
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Old 09-28-2009, 02:35 PM   #697
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Iv'e read through pages and pages here and it seems that gearing the SPX is hit and miss. I have a 17.5 fantom Ion2 on stock timing and the SPX is is the mail. What is a good starting point for Ashfalt racing and a TC5. Right now with my LRP Sphere TC i am geared at 4.08FDR on profile 4. It has good punch and good top end. after a 5min qual it comes off at 140-150 deg. where should i start when the SPX comes in?

Pinion = 49T
Spur = 100T
Internal ratio = 2.0
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Old 09-28-2009, 02:58 PM   #698
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Originally Posted by billythekid View Post
SP 17.5T is one of the fastest, if not the fastest stock motor available. I have tested a lot of stock motors. The timing is fixed, you do not need to change it, because the timing is fixed at the optimized position. It also work perfectly well with SPX, you should be able to go really fast with this combination. You should run profile 8 with it, and all you need to do is figure out the gearing. You should gear it around 3-4 tooth (64 pitch) smaller on the pinion than with Sphere TC.

If your car is slower than cars with Sphere TC with this setup, then the problem should be with your battery packs.

Hope it helps
thanks Billythekid... currently i am using profile 7 with 4.2 FDR on a TA-05... it seems that on the straights i dont have good top end but in the in-field the car responds very well..

i'll give profile 8 a shot and try even lower gearing... maybe 4.5 or even 5.0 what do you think?
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Old 09-29-2009, 04:16 AM   #699
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Originally Posted by Maxxican View Post
Iv'e read through pages and pages here and it seems that gearing the SPX is hit and miss. I have a 17.5 fantom Ion2 on stock timing and the SPX is is the mail. What is a good starting point for Ashfalt racing and a TC5. Right now with my LRP Sphere TC i am geared at 4.08FDR on profile 4. It has good punch and good top end. after a 5min qual it comes off at 140-150 deg. where should i start when the SPX comes in?

Pinion = 49T
Spur = 100T
Internal ratio = 2.0
How long is a peice of string?

Gearing the spx is a trial and error thing with every track and car slightly different. I run the same combo with a 40c lipo and the tc spec users are geared at around 3.5 and im at 4.3 which is 4 teeth. I would start with middle hole timing, profile 7 and drop 4 or 5 pinion teeth. You need to be able to feel the timing kick in about half way down your straight and also have enough punch to launch out of corners and lunch the other cars as they spool up.
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Old 09-29-2009, 05:04 AM   #700
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Originally Posted by sidecarphil1 View Post
i use the Track Power 4000 lipos
If I remember correctly, the Track Power packs are gold in color and they are not very fast. They lack punch and may not be powerful enough to supplier the amps needed. I am not an electrical engineer, but from my experience on the track, IP 5000 40C or SMC 5200 50C are the fastest packs. Try one of these packs and I am pretty sure you will feel a power gain. Also note that you may need to run different gearing with different battery lipo packs.

Hope it helps
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Old 09-29-2009, 07:35 AM   #701
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these are them
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Old 09-29-2009, 11:58 AM   #702
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Hello,

I'm new to this forum.
I've a question about the spx stock spec.

I currently have an 9.5t stockspec.
My ESC is A.I. pro reverse.
Speed is about 75-85kph.
It is already uncontrolable at the streets.
On the circuit it looks very slow, because this is big.
It spins away from 0-75
Gear ratio is - 3.96 on ta05R (ta05=stupid for gearing under 5=not realy possible)
i'm using lipo's


When i upgrade to an spx what will be the top speed?
I maybe want to use an modified motor later, 5turns-4turns. although it make not much of an difference with a 9.5t stock spec i think?

I've seen somebody at the circuit with the same motor and an tc-spec esc. It has so much more power.
You can really hear it produce power after corners.

I really like the 9.5t stock spec motor. it has super output.

The only thing that is bodering me is that there is no reverse function......
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Old 09-29-2009, 12:34 PM   #703
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Originally Posted by Alienbliep View Post
Hello,

I'm new to this forum.
I've a question about the spx stock spec.

I currently have an 9.5t stockspec.
My ESC is A.I. pro reverse.
Speed is about 75-85kph.
It is already uncontrolable at the streets.
On the circuit it looks very slow, because this is big.
It spins away from 0-75
Gear ratio is - 3.96 on ta05R (ta05=stupid for gearing under 5=not realy possible)
i'm using lipo's


When i upgrade to an spx what will be the top speed?
I maybe want to use an modified motor later, 5turns-4turns. although it make not much of an difference with a 9.5t stock spec i think?

I've seen somebody at the circuit with the same motor and an tc-spec esc. It has so much more power.
You can really hear it produce power after corners.

I really like the 9.5t stock spec motor. it has super output.

The only thing that is bodering me is that there is no reverse function......
Holy mama !!! ur using 3.96 FDR on a 9.5t motor???

You're gonna end up frying something sometime later... change that gearing plzzz.... circuit racing is not about top speed... its about gearing it right for optimum speed with optimum temperature for optimum efficiency and runtime...

Ive never tried 9.5t so you should ask other users for a base FDR in this forum....
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Old 09-29-2009, 12:54 PM   #704
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I don't really have an idea what the FDR should be.

It tried 7-6-5-4 FDR and had never the idea it was really going fast. It also has no real punch.

The manual says to start with 5.....

Is the esc limiting any real speed increases.
What I sad was, i've seen somebody with the same motor and tc-spec and it has so much more power.

What FDR is everybody here using with stock spec engines for circuits?

Is the tc-spec better for modified motors or can i achieve the same performance with an stock spec esc?
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Last edited by Alienbliep; 09-30-2009 at 05:20 AM.
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Old 09-30-2009, 11:59 AM   #705
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Originally Posted by Alienbliep View Post
I don't really have an idea what the FDR should be.

It tried 7-6-5-4 FDR and had never the idea it was really going fast. It also has no real punch.

The manual says to start with 5.....

Is the esc limiting any real speed increases.
What I sad was, i've seen somebody with the same motor and tc-spec and it has so much more power.

What FDR is everybody here using with stock spec engines for circuits?

Is the tc-spec better for modified motors or can i achieve the same performance with an stock spec esc?
Between ur AI Pro and a TC-Spec and an SPX, there is so much differences... It would take ages to explain in details but all comes down to the dynamic timing that the newer generation esc have inside as opposed to the older and non-racing esc such as your AI Pro...

Before SPX was released, TC-SPEC esc were to ones to get as their profile 8 was the bomb in increasing timing... but now, TC-SPEC profile 8 is similar to SPX profile 6 in terms of timing and SPX's profile 7 & 8 has the mother load of dynamic timing that makes the motor scream...

I dont think your AI Pro esc has the capability to do this but then again ive not seen nor use one before...

In terms of gear ratio, i think 10.5t brushless were running around 6-ish ratios and therefore for your 9.5t, theoretically it should be higher... maybe you can try around 6.5 - 7 FDR perhaps... maybe someone else could chip in some thoughts...

But stop running ur 9.5t motor at 3.96 FDR or else crazy shit could happen to ur esc or motor....
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