SPX Gearing?

[cutting_edge]

I know i am a bit late BUT just got an SPX is there a rule set in stone as to how many pinions you need to go different to a standard LRP or Nosram Matrix ISTC ESC

Running 13.5 i run at 4.2 on a Matrix ISTC Any suggestions on how much higher i need to go to get the most out of my new SPX ??????????????

Tried it today up and down the road and it didn't seem to be hitting the second power band so i presume i was well off !!!!!! i went 4 pinions lower when i tried it :confused:

Thanks in Advance :D

[Ade]

I know i am a bit late BUT just got an SPX is there a rule set in stone as to how many pinions you need to go different to a standard LRP or Nosram Matrix ISTC ESC

Running 13.5 i run at 4.2 on a Matrix ISTC Any suggestions on how much higher i need to go to get the most out of my new SPX ??????????????

Tried it today up and down the road and it didn't seem to be hitting the second power band so i presume i was well off !!!!!! i went 4 pinions lower when i tried it :confused:

Thanks in Advance :D

Well i found that the gearing does take a bit of getting used to. As a rough idea I was running indoors with an LRP Sphere with a corally 13.5 and was geared at around 5.4.

Am now running an SPX with a GM 13.5 (with a little bit of timing advance) and am geared at around 9.1 and it just flys!

I know it seem radically different but it just works!

Another example I was running at Bedworth over the summer and a local quick guy who was running 13.5 was geared at 4.5ish. I was running at 6.1 and lost nothing down the straight but was very punchy in the infield!

So gather from that what you will, but I would make sure you undergear rather than overgear it.

Ade

[markw]

as u no i run the stock spec nosram , at the last meeting at ipswich and the last round of the stcc i ran 4.41 on my gm motor....

[cutting_edge]

Ummmm That should not realy be possable as thats the same standard ratio as we all run on the old style Matrix ESC ............... Your Nosram Spec is not doing what its been designed to do , At that ratio its giving you no advantage over the old esc you had in the car befor ;) ......

I am thinking of closer to 7.0 to start having done some resesarch , I could be wrong :confused::eek:

[Mr.B]

Hi Trev,if i'd have been at coastal i'd have started around 7.5 with 10.5.;)

[Ade]

If I remember rightly I was geared around 6.9 at Ipswich and the car was by no means slow! If i could just learn to drive the thing I'd be laughing :D

[JJC]

There seems to be some confusion regarding gearing for the SPX (well I'm confused anyway!)

I'm currently using a Novak GTB and the sweet spot on gearing with my Novak Ballistic 13.5 seems to be around 4.6 (med carpet track). I now have an SPX and I need some advice for a gearing starting point (same motor) using the esc profile 7 or 8, can anyone help?

Cheers

[THancock]

Hi Jez,

I was running 5.4 last time (using the same motor/speedo combo). This is on profile 8. Batteries were Intellect 5000 30Cs.

The car was weighing in at 1,358g and I did not use a motor fan.

It was pretty quick ;)

- Tim.

[JJC]

Hi Tim,

Pretty quick? It was devastating :eek:

Thanks for the advice, I'll give it a go. I'm using Demon 35C Lipo's and my car is an almost identical weight to yours.

Have you advanced your motor at all? Mine is still set to factory timing.

Cheers

Jez

[THancock]

The motor had about 1mm of advance from the neutral position.

[Tricksy]

Hi Tim,

Pretty quick? It was devastating :eek:

Thanks for the advice, I'll give it a go. I'm using Demon 35C Lipo's and my car is an almost identical weight to yours.

Have you advanced your motor at all? Mine is still set to factory timing.

Cheers

Jez


how did you get on i am going to try the smae motor combo this week what ratios are you happy with so far cheers ??