G2R race truck
 

I'm almost finished with my G2R truck. This was originally going to be a project truck but I've decided to focus on this truck specifically for racing.
The truck utilizes the 2 speed automatic tmaxx forward only transmission with a modified emaxx motor mount. The only stock Revo parts left on this truck are the f/r diffs, rear center drive shaft, bulkheads, body posts and bumpers. I decided not to use the stock g2 chassis plate because I wanted a little additional protection for my Lipo batteries. I used the g2 plate as a template and bent the sides up of the modified plate for rigidity and battery protection. I am using a Lehner 1950/7 with a 9920 and 6s Lipo. I am currently working through an issue with the signal from the receiver to the esc due to the Lipo DPM, but I believe I'll have a resolution fairly soon. I'll mount a micro servo behind the motor for the brakes.

I am also working on a center diff for the tmaxx tranny. The center diff is a work in progress but is definetly do-able.

Here's some pics

http://home.earthlink.net/~j1138/evo/g2r1.jpg

http://home.earthlink.net/~j1138/evo/g2r3.jpg

http://home.earthlink.net/~j1138/evo/g2r4.jpg

http://home.earthlink.net/~j1138/evo/g2r5.jpg

I haven't had a chance to run the truck outside yet because it hasn't seemed to stopped raining in weeks. However, from what I've seen on the work bech, the lehner 1950 is a beast of a motor.

Yeah, i was wondering why on earth didn't he used the lower plate.. :D

You could use those common 6-7 cells kyosho batterieholders, and use a small plate of aluminum/carbon fibre on the bottem of it to protect the cells.

You will love an automatic 2 speed on BL (at least, i did on my savage)

Another nice truck, Star. Yeah, the 1950 is an awesome motor. I'm sure you will love it.

Please tell me, are those regular offset rims?

My guess is, that those are the offset rimms of proline. i use them on my savage too. I love 'm... 23 mm hex.. light tires on it make it a very light wheel

Hey Serum, I know the lower plate isn't as nice looking as the g2r plate but its very light weight and functional. I had some clearance issues for the batts but I'll probably look at a carbon fiber solution in the near future.

Hey Daf, those are the crime fighter tires and Pro-Line Maxx Wheel Standard 23mm Yellow, Mike carries them. They come in different offset options. The wheels pictured are the standard offset.

I decided to stick with the Anderson Power Pole connectors. I am upgrading from the standard 30amp plugs to the 45amp plugs. The 30amp plugs are known to draw high amps but I want to make sure my Lehner gets enough juice. I also purchased a West Mountain Radio PWRCrimper so I will have solderless connections all around (Less resistance and no soldering) :017:

Take care

Nice truck Starscream. I'm planning a similar tranny for my G2R, only i'm going with a single speed.

Hey, thanks starscream. Standard offset, then. The tires were obvious, and I figured standard maxx 23 wheels, just didn't knew about the offset.
I was wondering because I just bought a set of crimies, and have to decide if I glue them on offset rims or not. But I have only standard hexes, though. I think I will go with the standard offset this time.

Those are standard for the Maxx trucks. On a revo they are offset, not sure exactly but about an inch, maybe more

Thanks. I know the PL tire guide, handy thing.

nice truck starscream me and one of my friends have been working on putting tmaxx tranny in our emaxx's let us know how you like it

Thanks Boss,
I ran the tmaxx tranny in my gmaxx a few years ago. In my opinion, unless you run a single speed, the automatic two speed is the only way to go. The revo tranny has a few more options for gear ratio's but unfortunately, it won't fit on the xbraces properly (My revo spur gear is too big but the tmaxx spur gear placement is just right) .

I got email back from BK about the 9920 esc. They said the input signal voltage for the esc is 3.8 volts. Since the FMA DPM output is only 3.3 volts it doesn't seem to work. FMA is sending me a 4 volt buffer to correct the problem. I should receive the buffer next week so I'll post the results when I can.

Oh and My Seahawks finally made it to the Super Bowl. I smell a victory Sunday. You heard it here from Starscream :cool:
Go HAWKS!!!

If at all possible, I will be racing this beast next Saturday against the nitros.

Here's some updated pics of the completed truck:
http://home.earthlink.net/~j1138/evo/g2rv2_0.jpg

http://home.earthlink.net/~j1138/evo/g2rv2_1.jpg

http://home.earthlink.net/~j1138/evo/g2rv2_2.jpg

http://home.earthlink.net/~j1138/evo/g2rv2_3.jpg

http://home.earthlink.net/~j1138/evo/g2rv2_4.jpg

I am using 2 3s FMA BalancePro HV Lipo's with FMA DPM's. I should be getting a signal buffer in the mail soon to correct the problem with the DPM to esc signal loss.

I've tested the truck without the DPM's and the Lener 1950 has gobs and gobs of power. Its a little over the top but what the heck :017:

Very nice, what springs/oil are you using?

I am running 60w oil w/black springs on the rear and 45w oil w/gold springs on the front.

I got to run a lehner 1950 to starscream. I have a 8t hiamp. It is right potent little motor. I have not got to test it out fully yet. That is a clean machine you have built again.

I'm going racing today and I thought I'd post a quick update :017:
I've mounted the tmaxx3.3 revo spec tranny on my g2r. This tranny fits great and was actually easier to adapt than the original revo tranny. The only reason I went with this tranny was because of the ease of a center diff installation. This entire mod was done with just a dremel...
My center diff is installed with 50K fluid and I'm ready for the races. This setup uses a slightly modified stock drive shaft for the rear and the long g2r bone in the front. I haven't got my esc and dpm's back from FMA yet so I'll be racing the maxcim for now. :028:

Hey Daf, you'll see that I took your advice with the socks :dft012:

Here's some pics
http://home.earthlink.net/~j1138/evo/g3rt1.jpg
http://home.earthlink.net/~j1138/evo/g3rt2.jpg
http://home.earthlink.net/~j1138/evo/g3rt3.jpg
http://home.earthlink.net/~j1138/evo/g3rt4.jpg

Cool thing star!

What's up with the 3.3 case, that makes the diff fit in easier? is it larger at the output shaft?

I forgot to mention my dilema,
I have a 1/8th center diff for the Revo tranny but the revo tranny doesn't fit the g2r xbraces properly so I went with the tmaxx tranny and was working on a center diff solution for the tmaxx trans. Then Traxxas comes out with the 3.3 tranny, which uses at the same gears as the revo tranny, and they solved my problem. All I had to do is make the motor mount and adjust the rear shaft a bit. The motor mount actually works better on this tranny because I can utilize several of the diff case screw/mount points for motor mount stability. You can see in the first pic, I'm using black plastic spacers between the tranny mount and the motor plate. I messed up the one on the left so the spacer won't align properly. :031: Its not really even needed so I'll look at correcting it later. I also developed an easier method to mount a plate on the revo type cases. I'm not sure why I didn't think of this before.

Cheers

I'm not sure if you know about this, but Traxxas is making a diff for the Revo tranny!

Ya, and the revo center diff will be a direct fit with the tmaxx 3.3 tranny :027:
The revo center diff looks like a standard f/r diff with a modified 28t gear and longer output shafts. If I have problems with my 1/8 scale diff, I'll give the revo diff a try.

I've heard about that too Metalman.

Any idea when it's available Starscream? and it does only fit the 3.3 housing?

The Revo center diff should be available later this month. It will be a direct fit with the Revo tranny as well as the tmaxx 3.3 tranny. The diff doesn't look that big so it would fit in other housings but the output shafts are only so long and the 28t gear is a special design so moding a smaller/larger gear would be a challenge.

I raced my g2r today. I did well but didn't finish the A-Main because of major binding on the front right axle. I probably need to reduce the shims I used to reduce the binding. I was happy with the performance though. I'm going to take apart the tranny and check how the center diff is doing.

Next week, I should have my Lehner 1950 ready to race :017:

There was a large race ~40 miles north of me last weekend (at Peelit raceway) I was told that a brushless Revo raced against the nitro Revos.
The brushless Revo was not allowed to race with Lipo's so the driver used 14 cell 3800's. I thought this was quite petty and wondered how the nitro guys would like only being able to run with 15% nitro instead of 30%. I don't even run nihm's anymore so I guess I'll have to make sure I can run Lipo's before I waste my time going to events like those. I just think those guys are afraid of getting beat by an electric monster :005:

LOL.. Same old story..

How many lipo's are you going to use?

5S?

I am running 6s with the maxcim system and the 1950/9920. I would like to try 8s, with my 12XL, sometime soon. The test runs I made with the 1950 on 6s were quite impressive. I did notice that the 9920 got hot pretty quick (over 100 degree's in just a couple minutes) but the 1950 was still cool to the touch. I'm hoping that gearing the truck down a bit will lower the esc temps enough.