Help with gearing/new track astro/dirt

[toddzellia]

I have a cougar sv pro are new track is half astro and dirt ,I am running a 10.5 120a motor combo,24/80 gearing stagard rib ft mini spike back.Now more power ? Change gearing ? What timing ? And help would be greatly appreciated
Cheers.

[rollingon4]

Hi there, I've been using the below as a ballpark gearing guide for my cougar:

http://www.teamnovak.com/tech_info/b...r_gearing.html

With a 10.5t motor that would mean a 26t pinion with your 80t spur to give a FDR of 8.0 if you haven't changed the internal gearing from standard. I'm no genius though so I'm sure someone has a better suggestion

[toddzellia]

Cheers but I was told that if you have a smaller pion you will have more top end but Iam no expert .

[Ralls Racing]

the advice given is correct. 26-27 tooth is a good starting point and will give more top speed

[toddzellia]

Cheers.....

[ian h]

Whenever I've ran a 10.5 I usually ran 78/27. Considering half your track is dirt I would consider a smaller spur like a 76 and a 26 pinion.
This will move the motor back slightly and help give a little more weight to the rear to aid traction.

[toddzellia]

Thats good to know but schumacher has only 80-83 spur do you know another place or a another brand that will fit

[ian h]

Originally Posted by toddzellia

Thats good to know but schumacher has only 80-83 spur do you know another place or a another brand that will fit

RW racing

[Chris_d]

I run with a 7.5t motor, schulze esc, standard cougar internal gearing and a 26/80 ratio on astro at Southport. I'm slightly down on top speed but still have plenty of torque left at mid throttle.

I suggest a 26 or 27 pinion to start with. does any one have the calculations for FDR on a cougar

[rollingon4]

Try the FDR calculator at the bottom of this page:

http://driftmission.com/tools/

Countersteer Ratio/Final Drive Ratio is your internal gearbox ratio which as standard is I believe 2.6

If you've got an Android phone I use a free app called Gears from Nor-cal Hobbies, there are loads kicking about though...

PS - If you're down on top speed I found the biggest difference was changing/updating ESC software as you're geared high anyway

[Chris_d]

bit of stupid moment really... I knew the internal was 2.6 and i knew my external ratio, not entirely sure why i didn't do the rest really..

I thought 8 FDR was about right, its probably the motor not being a real 7.5t (ebay special) its coming off warm ish so I may go up a little further see what happens.

[toddzellia]

Originally Posted by ian h

RW racing

Thanks but all I saw was 80-83 but I wrote them an email to see if they could help me out CHEERS.

[ian h]

[QUOTE=toddzellia;671568]Thanks but all I saw was 80-83 but I wrote them an email to see if they could help me out CHEERS.[/



Due to customer demand from around the globe, we have again increased the range of spurs we produce for the Schumacher Cat SX & Cougar SV. Just added to the current range of 78T thru 83T are the following,

72T

74T

76T

Posted by RW Racing at 03:07 1 comment: