CEN R2 Matrix....!! - RC-Monster Forums

jzemaxx · **CEN R2 Matrix....!! -** 03.01.2009, 07:14 PM

Guys I'm about to move up to the 1/8th scale buggy class racing. Going with the new R2...how does this setup look??? Am I missing something?? Going with a 1512 1Y and MMM ESC on twin 2S's in parallel.

Differential Ratio: 2.888888888888889
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 20
Total Voltage: 7.4
Motor KV: 2750
Tire Diameter (inches): 4.3
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.0035
Spur/Pinion Ratio: 2.3 : 1
Total Ratio: 6.64444 : 1
Tire Circumference (inches): 13.51 inches (343.12 mm)
Total Motor Speed: 20350 RPM
Vehicle Speed: 39.18 mph (62.94 km/h)
Effective KV Value: 2750
KT constant: 0.49 oz-in/A

Hardstyle · 07:27 PM

I don't know much about buggys, but isn't everyone using something like 4-5s lipos on them? 2s lipos with 2750kv might have a less torque? Personally I would put some lighter kv motor, more voltage and gear it down.. But again I don't have a buggy :D

jzemaxx · 03.01.2009, 07:31 PM

Its to keep the weight down. Also I'm only trying to go 40mph....not 60 like most. Also buggies are VERY light so running higher KV motors and lower voltage is not as bad.

jhautz · 03.01.2009, 10:09 PM

Ummmm.... I agree with the last guy. Your not gonna have much success with 2s in a 1/8 buggy.

I would strongly recoment going with at least 4s.

jzemaxx · 03.01.2009, 10:43 PM

I figured since it was so much lighter, it shouldn't need such a large motor and lots of voltage. Heck 3S on a 1512 1y on my buggies truggy is stupid fast and runs 35-40mph and runs cool. The buggy is another 1-2lbs lighter.

rootar · 03.01.2009, 11:06 PM

go with a 1512 2.5d on 4s or 5s and gear for 40 and youll be golden...

or atleast go 4s on that 1512 1y and gear down for 40...... your gonna have a HOT motor and puffed lipos if you try to put a little 1512 only spinning 20,000 rpm in a 7.5-8 pound buggy and gear it for 40mph.... it just dont work like that.....

jzemaxx · 03.01.2009, 11:09 PM

I was also looking at the 1515 1.5D

brushlessboy16 · 03.01.2009, 11:11 PM

the 1515 1y on 4s seems to be a hot ticket.

jzemaxx · 03.02.2009, 12:01 AM

Quote:

Originally Posted by brushlessboy16

the 1515 1y on 4s seems to be a hot ticket.

Just trying to save weight. Using a 1512 should be a little lighter.

lincpimp · 03.02.2009, 12:32 AM

A 1512 will be fine. I would go with 5-6s and smaller packs. I run a 1600kv medusa 60mm (similar to a 1512) in a hyper8 with 6s 2170 mah 25c fp lipos. It is well under 8lbs with batts and the body. Runs great too!

jzemaxx · 03.02.2009, 02:10 PM

Quote:

Originally Posted by lincpimp

A 1512 will be fine. I would go with 5-6s and smaller packs. I run a 1600kv medusa 60mm (similar to a 1512) in a hyper8 with 6s 2170 mah 25c fp lipos. It is well under 8lbs with batts and the body. Runs great too!

What kind of run time??? Our A-mains are 30 mins......will it make that kind of main??

lincpimp · 03.03.2009, 03:05 AM

Quote:

Originally Posted by jzemaxx

What kind of run time??? Our A-mains are 30 mins......will it make that kind of main??

I doubt it gives more than 15mins of hard driving...

Listen to jhautz, he has it right!

Arct1k · 03.02.2009, 02:47 PM

No - 30min mains are going to need a battery change...

jzemaxx · 03.02.2009, 02:48 PM

I wonder if I could get away with a 3S setup and run 2 in parallel.

Arct1k · 03.02.2009, 02:58 PM

You will have a faster more reliable setup without - too heavy a battery will just slow you down and cause breakages...

I think you'd be better off with a change - JHautz runs in longer races - I'd listen a lot to him...