This is a copy from a post I've made on another forum. Ill keep them both updated especially considering this is a more appropriate forum.
My Posts: (I'll continue updating)
#1
A few weeks back I picked up a couple of castle 2028 motors. I decided to turn one of my DBXLs into an electric. I grabbed a motor mount for a MTXL which I chucked in the milling machine and began sending chips flying.
I now had a motor mount that I could mate up to the castle 2028 and after drilling and tapping a few holes would also fit the existing engine holes in the DBXL chassis. The spur gear is 61T so I drilled the mount to allow me to run from a 13T to a 21T pinion. 13T was sad on 8s. Looking at the logs I was damn near pulling 25,796 rpm. Mind you at 8s x 800=26880. I moved up to a 15T pinion and acceleration and top end were a lot more to my liking. Rpm with the 15 were in the 24,4** range. I have 17, 19, and 21 left to go but im going to give this 15T a little more time.
Due to all of the wet weather and my strong aversion to mud, I haven't had an opportunity to run it in the grass yet. Temps on pavement were very very good. I ran the buggy from fully charged to lvc (3.5v) and could hold the motor all day.
I had to come up with a way to mount the batteries and hopefully balance out the buggy. If you don't know, the DBXL gassers are front heavyAf. I 3d printed some battery trays that required me to drill 6 new holes and enlarge one existing. The trays are mounted with 5mm hardware. One hole on each tray is mounted to the side skirt and the other 3 through the aluminum chassis. I used two straps per tray since the design of the tray prevents sliding length wise.
I'm not sure if or when I will go back. Im still playing for now. The weight is roughly the same but now the balance is great. It's about as fast, it just gets there quicker. The sound and sweet smell of methanol is something I'm missing.
Here's a video of her last run with gas (for now)
#2
Went and found some suitable dry grass at a near by school. Ran 8s down to 3.69vpc. If these number are correct....I'm definitely going with a larger pinion gear. It's 50 degrees out. I'm more concerned about the driveline heating up than I am any of the electronics. The batteries were warmish at 94 degrees. Took me about 15 minutes to get home from where I ran and the driveline was a little warm. Center diff housing was warm. Not hot but something I'll keep tabs on while running to get a better idea of what's going on. I've got 30k in both the front and the rear and only 100k in the center. I may thicken that up to slow those gears down in there. This is typical of my type of running. Low cut grass or construction sites. I keep my jumps under 2 feet. I'm pretty impressed. Run time was sufficient. I kept wondering when I was going to hit LVC. Never did.
#3
Took her back out this am and ran it down to lvc using a 21th pinion. Acceleration is down a tad but definitely acceptable. It's a wee bit faster but ill have to put it on pavement and wind her out one good time. Temperatures were higher as was amp draw and ripple. No cap pack just the MMX8S. So far so good.
#4
Oops.
Made a few changes. 60k 500k 60k. New receiver just as a rule out. Ran twice today. Both good runs around the baseball field. Got a really really weird data log at first. Swapped recs, dropped voltage to 6.0 bec instead of 7.5. Ill throw up the logs in a bit. Was accelerating hard, loud bang, tire go boom. The beadlocks i made work. No denying that. Now for new tires.
My Posts: (I'll continue updating)
#1
A few weeks back I picked up a couple of castle 2028 motors. I decided to turn one of my DBXLs into an electric. I grabbed a motor mount for a MTXL which I chucked in the milling machine and began sending chips flying.
I now had a motor mount that I could mate up to the castle 2028 and after drilling and tapping a few holes would also fit the existing engine holes in the DBXL chassis. The spur gear is 61T so I drilled the mount to allow me to run from a 13T to a 21T pinion. 13T was sad on 8s. Looking at the logs I was damn near pulling 25,796 rpm. Mind you at 8s x 800=26880. I moved up to a 15T pinion and acceleration and top end were a lot more to my liking. Rpm with the 15 were in the 24,4** range. I have 17, 19, and 21 left to go but im going to give this 15T a little more time.
Due to all of the wet weather and my strong aversion to mud, I haven't had an opportunity to run it in the grass yet. Temps on pavement were very very good. I ran the buggy from fully charged to lvc (3.5v) and could hold the motor all day.
I had to come up with a way to mount the batteries and hopefully balance out the buggy. If you don't know, the DBXL gassers are front heavyAf. I 3d printed some battery trays that required me to drill 6 new holes and enlarge one existing. The trays are mounted with 5mm hardware. One hole on each tray is mounted to the side skirt and the other 3 through the aluminum chassis. I used two straps per tray since the design of the tray prevents sliding length wise.
I'm not sure if or when I will go back. Im still playing for now. The weight is roughly the same but now the balance is great. It's about as fast, it just gets there quicker. The sound and sweet smell of methanol is something I'm missing.
Here's a video of her last run with gas (for now)
#2
Went and found some suitable dry grass at a near by school. Ran 8s down to 3.69vpc. If these number are correct....I'm definitely going with a larger pinion gear. It's 50 degrees out. I'm more concerned about the driveline heating up than I am any of the electronics. The batteries were warmish at 94 degrees. Took me about 15 minutes to get home from where I ran and the driveline was a little warm. Center diff housing was warm. Not hot but something I'll keep tabs on while running to get a better idea of what's going on. I've got 30k in both the front and the rear and only 100k in the center. I may thicken that up to slow those gears down in there. This is typical of my type of running. Low cut grass or construction sites. I keep my jumps under 2 feet. I'm pretty impressed. Run time was sufficient. I kept wondering when I was going to hit LVC. Never did.
#3
Took her back out this am and ran it down to lvc using a 21th pinion. Acceleration is down a tad but definitely acceptable. It's a wee bit faster but ill have to put it on pavement and wind her out one good time. Temperatures were higher as was amp draw and ripple. No cap pack just the MMX8S. So far so good.
#4
Oops.
Made a few changes. 60k 500k 60k. New receiver just as a rule out. Ran twice today. Both good runs around the baseball field. Got a really really weird data log at first. Swapped recs, dropped voltage to 6.0 bec instead of 7.5. Ill throw up the logs in a bit. Was accelerating hard, loud bang, tire go boom. The beadlocks i made work. No denying that. Now for new tires.
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