Pinion recommendations for Novak 7.5 - Madrat!!!

[Colinevan]

Hmm im gonna hopefully get the rat up and running for a quick blast, but im unsure on where to start pinion wise.

Running a 4900 lipo , Gtb and Matching Novak 7.5, has anyone ran one yet and what was your gearing.

THanks

Col.

Hmmm for a laugh shall i put a 4.5 in and melt the bushings lol...

[DCM]

I would be thing 22/23 to start with

[Colinevan]

I would be thing 22/23 to start with

Thanking you :D

Col.

[bmx833]

thought best to reply to this one then starting a new thread

ordered my madrat lastnight but dont no what pinion to use, what pinion would you suggest for a 27t brushed race motor?

also how long do they take to build on average?

many thanks

Brad

[DCM]

Mine took about 5 hours to build, taking my time.

Stock motor, I would of thought, start at a 25 and go up, as it all depends on if the motor is revvy or torque based 27t.

[qatmix]

I built mine without taking note of the amount of teeth on the gears so havent a clue on the internal gearing ratio. Anyone know it?

I think the diff is 52t, the shaft is 20t and the spur is 80t..

[DCM]

it is 2.6:1, I got a gear ratio chart, but it is on the other comp

[bmx833]

ok, thanks

[carty]

interesting, i ran with the kit 21 tooth and 80 spur using a nosram 13.5 and lacked any real top speed and my esc was fairly hot after the heat is it poss i was under geared as you rec 22/23 for a 7.5 system

[DCM]

well undergeared, I am on a 23 with a 10.5

[carty]

so go up you would recomend, ive got a 24 will try that, thanks Dave.

[General Accident]

well undergeared, I am on a 23 with a 10.5

Glad I read this thread, I have a 10.5 and was going to run for the first time tomorrow with the 21T kit pinion. How are you finding the 23T? If it's getting the motor hot I have a 24T that I may put in instead.

[DCM]

it is good actually.

[bert digler]

it is good actually.

i ran a 25 with a 7.5 nice and cool after run

[carty]

do you think i should be looking at 25/26 for a 13.5t motor?

[DCM]

it depends on your ESC setup, motor and track to be honest, 25 and check temps

[carty]

magic, thanks.