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Old 09-23-2013, 03:22 PM   #136
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Hi,

Looking at getting myself an XI sport... Is it possible to change the internal ration so I could use smaller pinions (which I already have).

Thank you,
Martin
You can change spur gear,diff pully,spur gear pully,the only dramatic change will be the the spur gear. Once you have changed all the pulleys you could of use the money for the pinion . What FDR are you after ?
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Old 09-23-2013, 06:42 PM   #137
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Originally Posted by Yogi- View Post
You can change spur gear,diff pully,spur gear pully,the only dramatic change will be the the spur gear. Once you have changed all the pulleys you could of use the money for the pinion . What FDR are you after ?
I'm looking to run FDR of 3.5 on my 21.5 setup, using 70t spur and 40t pinion.
The 3 Racing spurs below 72t are problematic for fit without cuting pieces out.
I found RW Spurs for Scythe and Serpent will work and they are flat. I've been told a 60t spur will work before the holder gets in the way of the teeth.

I may be looking to go down in spur to 65 (FDR 3.25) later.

For ppl in Aust., Feral Batteries sell these spurs.

Ric
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Old 09-23-2013, 08:16 PM   #138
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Quote:
Originally Posted by Yogi- View Post
You can change spur gear,diff pully,spur gear pully,the only dramatic change will be the the spur gear. Once you have changed all the pulleys you could of use the money for the pinion . What FDR are you after ?
You can get T2 008/009/T2R Pro 34 tooth front and rear diff pulleys and belts and convert it to 1.7 final drive. I have the set saved from my T2R Pro with a Spec-R 34 tooth gear diff, a pair of T3 ball diffs with T2 009 diff pulleys, and a T2 009 34 tooth front spool for when I Run at big outdoor Asphalt tracks running VTA. With a 92 toots spur and the 1.7 drive set I can gear down to 3.0. drive.
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Old 09-23-2013, 08:57 PM   #139
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Originally Posted by Ricardo40 View Post
I'm looking to run FDR of 3.5 on my 21.5 setup, using 70t spur and 40t pinion.
The 3 Racing spurs below 72t are problematic for fit without cuting pieces out.
I found RW Spurs for Scythe and Serpent will work and they are flat. I've been told a 60t spur will work before the holder gets in the way of the teeth.

I may be looking to go down in spur to 65 (FDR 3.25) later.

For ppl in Aust., Feral Batteries sell these spurs.

Ric
I've got a 66 and a 68 3racing spur on the standard holder they fit but you'll need to trim the spur gear holder up a bit. At the moment I'm running Fdr of 3.15 and a rollout of 61ish with
foams.
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Old 09-23-2013, 10:31 PM   #140
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Originally Posted by GP40X View Post
With a 92 toots spur and the 1.7 drive set I can gear down to 3.0. drive.
You can get a FDR of 3.0 by going 60 spur / 40 pinion without changing all that gear. Not sure of any advange of dropping internal ratio from 2.0 to 1.7.


Quote:
Originally Posted by Yogi- View Post
I've got a 66 and a 68 3racing spur on the standard holder they fit but you'll need to trim the spur gear holder up a bit. At the moment I'm running Fdr of 3.15 and a rollout of 61ish with
foams.
What motor and esc do you run, what temps are you getting?

Last edited by Ricardo40; 09-23-2013 at 10:32 PM. Reason: spelling
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Old 09-24-2013, 02:53 PM   #141
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Originally Posted by Ricardo40 View Post
You can get a FDR of 3.0 by going 60 spur / 40 pinion without changing all that gear. Not sure of any advange of dropping internal ratio from 2.0 to 1.7.




What motor and esc do you run, what temps are you getting?
I'm running a reedy 21.5 it won't get hot till you crank the timing right up but my tyres are around 56 mm. Tend to work our gearing with the roll out not the Fdr. I like to be around 55 - 62mm rollout for 21.5. Can't give away to many secrets before challange cup.
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Old 09-24-2013, 05:01 PM   #142
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I'm running a reedy 21.5 it won't get hot till you crank the timing right up but my tyres are around 56 mm. Tend to work our gearing with the roll out not the Fdr. I like to be around 55 - 62mm rollout for 21.5. Can't give away to many secrets before challange cup.
My rollout atm is 56.5 and motor is around 60*, looking to get a 65t spur in a couple of weeks which will bring it to a rollout of 61. ATM I have a small amount of timimg on the motor (5*), is it better to tweek gearing or timing?

BTW good luck at Canberra.

Ric
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Old 09-24-2013, 06:59 PM   #143
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My rollout atm is 56.5 and motor is around 60*, looking to get a 65t spur in a couple of weeks which will bring it to a rollout of 61. ATM I have a small amount of timimg on the motor (5*), is it better to tweek gearing or timing?

BTW good luck at Canberra.

Ric
I think there's a sweet spot for the motor timing to suit the track.With me I end up full blast at the end of the night. Fasta fasta fasta smoke.
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Old 09-24-2013, 07:53 PM   #144
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Testing at track set up last night and the zero is still quicker. I think as suggested from some guys in the know, I need to go a shorter camber link and hopefully it might be a bit sharper. Might need to go to alloy bulkhead covers.
I might be using the zero on the weekend.
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Old 09-24-2013, 11:44 PM   #145
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yogi what do you all have in your zero?
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Old 09-25-2013, 12:32 AM   #146
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yogi what do you all have in your zero?
Everything sept the Cf Narrow chassis
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Old 09-25-2013, 02:10 AM   #147
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Quote:
Originally Posted by Yogi- View Post
I'm running a reedy 21.5 it won't get hot till you crank the timing right up but my tyres are around 56 mm. Tend to work our gearing with the roll out not the Fdr. I like to be around 55 - 62mm rollout for 21.5. Can't give away to many secrets before challange cup.
Is that an older Reedy or the Mach 2?

I'll be there with my Zero's too, one with a Reedy 21.5 and the 2nd one with a V3 Speed Passion with a roll out around 68 (may even go higher ).
My Reedy is the older one, I've heard some bad reports about the Mach 2.

Cheers
Rob.
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Old 09-25-2013, 04:09 AM   #148
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Is that an older Reedy or the Mach 2?

I'll be there with my Zero's too, one with a Reedy 21.5 and the 2nd one with a V3 Speed Passion with a roll out around 68 (may even go higher ).
My Reedy is the older one, I've heard some bad reports about the Mach 2.

Cheers
Rob.
It's the first one I think Rob. Nothing on it says a mark2. Has over 40/45 on the
Timing. Excellent motor I also use a turnigy trackstar that I can gear right up easily 3-4 more teeth on the reedy.
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Old 09-25-2013, 06:34 AM   #149
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It's the first one I think Rob. Nothing on it says a mark2. Has over 40/45 on the
Timing. Excellent motor I also use a turnigy trackstar that I can gear right up easily 3-4 more teeth on the reedy.
Sounds like it's the earlier one with the plastic timing cover. The mach 2's have one less cooling hole on the endbell side which causes them to get hotter than the earlier ones. One of our guys bought a new Reedy Mach2 for the indoor titles and it was just always slow & ran very hot, turned out that it had too many shims in it which was pressing hard against the bearings.

I've got a Turnigy Trackstar as well but I can't get the same speed as the Reedy out of it no matter what timing/gearing settings I use, but then again it's the earlier silver coloured one. Might have to grab another now that they are red in colour and see how it performs against the silver one (for the excellent price that they are).

Cheers
Rob.
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Old 09-25-2013, 09:08 AM   #150
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Just traded for this XI Sport and got all my electronics in it. Can't wait to get it on the track. Hope it's just as durable as my Zero S VTA racer.

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