E-crt

Hello,

Finished it today! Learned a hard lesson about hardned spurs so upgrades are already in order. I'll be hitting the track with it tomorrow. I'll post something after I see how it performs. The "road" test was very exciting.






DM

[stampy]

killer! lipo or nimh? how many cells?

[crazyjr]

Looks like a lipo setup to me, maybe...4s 3700? Very nice truck MacII, looks like you got a lot of room on there

looks cool, fine design help you out with that setup?

[Gustav]

Looks very neat and tidy,nice!

[jameschatz]

Looks good, did u cable tie the motor in there?

ALso get the chassis braces if you plan on doing fairly hard bashing ;)

Thanks guys....

I'm running FMA Scorpions...two of them...making it 4s. They are only 3200's.

Fine Design inspired me to undertake the project. I bought the motor mount and battery brace from them. The layout is my own idea to balance the weight a bit. I was a bit nervous when I took a dremmel to my brand new CRT but I really think cutting up that radio tray opens up a world of layout options. It does get a bit more rats nesty when the LiPo's are in there but overall I think it's a clean layout. The UBEC is mounted on a little shelf I made out of an old wing...since the picture I added another piece of the wing under the rear driveshaft to hold down the motor wires. I doubt they can/would move but this way it's extra protection. I've also switched to a Fine Design Clutch Bell conversion until I can order some of those hardened pinions from Mike. The spur ate a standard pinion in one run.

I'm really itching to take it out...tomorrow AM...I can't wait. Of course with two more weeks on our points series I hope I can adjust to the changes quickly. Something tells me this truck will be everything my E-LSP was and then some...

I'll report in after the race tomorrow.

DM

Hardened steel pinions and hardened steel spur gears aren't such a great idea i don't think, it didnt work for me, it was eating my pinion too.

So what did you do?

Edit - actually, if Hardened Pinions and Spurs are not a good idea, how do Nitro trucks work? I mean, that's what they are using right?

Anyone out there using RC-Monster Hardened Pinions mated to a Nitro Steel Spur and having a problem with pinions getting damaged?

[Hydrodancer]

Originally Posted by MacII

So what did you do?

Edit - actually, if Hardened Pinions and Spurs are not a good idea, how do Nitro trucks work? I mean, that's what they are using right?

Anyone out there using RC-Monster Hardened Pinions mated to a Nitro Steel Spur and having a problem with pinions getting damaged?

Hey MACII, nice truck. I'm glad to see someone with enough balls to take on the nitroheads up at Wolcott. I just bought an SP1 and I hate it. Its such a beeznotch to get it tuned right (and DAMN those things are MESSY). I'm thinking about converting it to brushless. Thats why I went on this site to try to figure out what motor/esc/pinion combo to go with. Since its electric I think I might try it out on the indoor track.:018: I hope someone starts making a rtr lectric 8th scale so we can run a class. I like the stability of 1/8 but I can't stand the mess!

I "think" the problem with the metal pinion to metal spur is caused by friction and heat transfer. When the teeth engage and disengage eachother they drag and heat up. A plastic spur doesn't have this problem because the plastic is slippery. ALSO, plastic is a non coducter so the heat can not transfer from the motor to that gear.

Nitro engines can get away with metal to metal because there hp is LOW at low RPM. Thats why they have that crappy LAG when you hit the throttle! Lectric motors have max HP at 0 RPM! Thats why they kick arse!

ps. Lester is a really good driver. He beat me and Kevin by a lap last friday at the indoor track.:007:

Yeah Mac, me :) .

I got a kyosho 46t spur gear from Mike (It's plastic)

I dunno how nitro gets away with it actually.

For a 4s lipo what motor and controller are you running?

Originally Posted by cemetery gates

For a 4s lipo what motor and controller are you running?

I have a Schulze 18.97 and the motor is an XLT-1 from Fine Design, similar to an 8XL.

DM

[coolhandcountry]

Nitro don't have the same umph as electric.
That is why it holds up better.

BTW
Nice conversion.

Originally Posted by coolhandcountry

Nitro don't have the same umph as electric.
That is why it holds up better.

Yeah...I guess the whole clutch thing takes some of the brunt off for Nitro...

Have you run the hardened pinions with a steel spur? How long do they last together under race conditions?

I suppose my next question is, for years I've been running brushless with a plastic spur. On my E-Maxx, I LOCKED the slipper and on my E-LSP there was no slipper, how did that plastic spur handle it when two metal gears can't? I don't know if I can use a plastic spur, the CRT spur is the center diff cap...hope those pinions will hold up...

DM