Brushless Jammin CRT Project

[nl12]

Originally Posted by Serum

aiming for the 65-70 mph?

I suppose, I want the limit to be my finger, not the truck.

[nl12]

I am strongly considering the lehner 2250 10Turn to use 8s lipo and 20/51 gearing, but the main reason I am considering the 10 turn is that I know someone who has one local and I can be up an running sooner, whereas I would rather go with a 8 turn if I didnt have to wait 3-4 weeks to get it, anyone know if mike can get one fast, like a week or so, from lehner?

[Gustav]

Originally Posted by nl12

I am strongly considering the lehner 2250 10Turn to use 8s lipo and 20/51 gearing, but the main reason I am considering the 10 turn is that I know someone who has one local and I can be up an running sooner, whereas I would rather go with a 8 turn if I didnt have to wait 3-4 weeks to get it, anyone know if mike can get one fast, like a week or so, from lehner?

I definately wouldn't use the 8 turn on 8s,too many revs,the 10 turn is much more ideal,that's the turn i'd get for 8s.

[nl12]

I am going with the 2240 10 turn with 8s lipo with 20/51 gearing projected speed of over 75 mph :dft002: , I will probably bash around with 16/51 still over 60 mph capability :028: Now I am waiting for adaptors for my 51 tooth spur, motor mount, motor, mgm 16024, lipos, and me to get the truck put together. I may get a custom chassis plate made of titanium I gotta see how much that would cost though, maybe get me some carbon fiber shock towers, waiting on my CrowdPleazer 2 body to get painted. I got some 40 series sand paw tires for the sand dunes, I am hoping belted/corded tires come out soon until then duct tape will be my friend.

[squeeforever]

i think i would go for the 10 turn. unless the kv of the 8 is only like 1200 rpms per volt...

[Serum]

my guess is that the topspeed of that setup is 60-65 mph.

Fast enough!

wise choice, that 2240 is up to something good for sure!

[nl12]

I calculated that the system can provide 2190 W continous over 3800 peak with the hyperion lipos I plan to use so I would agree 60-65mph based on the continous rating but if the system can generate 3800 peak watts then I would think I could go quite a bit faster.

I will not get a titanium chassis, I got the quote back and its over $500 :002:

EDIT
If they are avalable when my motor comes in I will use "CPKOK4800-20C-4S-DNS NEW! Cell Pro Kokam 4800 mAh 4 Cell Pack with DNS Connector (20C), size and weight TBD $254.95" Lipos
4800 mAh and 20C AWESOME!!!

Any update on this one? or is it still 'work in progress'

very interested to see the finish thing....:cool:

[nl12]

I need to get my motormount built, then its finished, the machine shop at work is too busy to do side projects, I need to find someone with a mill.

[coolhandcountry]

If you have a design drawed up. You may want to chat with mike. He may be able to hook you up on it.

[strodedawg]

I am also working on an electric crt, as far as the system i have is the warrior12020 and the wanderer 7xl. i will be using two 7.4 lipos, is the crt going to overheat the bl system? fans will be used of course. i am not looking for insane speed maybe 40-45 but plenty of bottom end. thanks

[nl12]

Cool another bl crt it sounds like a good setup you may also consider using a single 4s or 5s lipo pack and putting the lipo pack on one side of the truck and and the motor on the other mounted low to the chassis

Me too, after driving a smelly one at my track I was smitten.
I should have the truck next week,
what do you think about the brake set up, is it best to keep the front/rear separate, or just let the motor do it and bin the mechanical brakes?

[Gustav]

A little off topic but I was just wondering about how a torque sensing (tor-sen) centre diff would behave with controller brakes,could it be a killer break setup,sending braking torque to the loaded axle or would it have the opposite effect and suck.

Cabking,i'm assuming,though i've never tried it, that with an open or std viscous diff that it would lock the rears as the rear tyres unload.That would be good or bad depending on your point of view/driving style.I was always taught 'off the brake and turn' and 'balanced drift-balanced throttle' so i wouldn't want to setup a car just for trail braking.

[coolhandcountry]

The weight oil you have in the diff has a big effect on the brake. i had 10K in mine and it did ok. I ran all motor brake.