Direct Drive to Diff E Revo Build

[squeeforever]

It says the 50 tooth diff is for a LSP, so I'm not sure to be honest. Just use a standard LSP cup for the pinion.

[lincpimp]

Put this on the pinion and put the dog bone end into it. Cvd end can go on the motor shaft.

http://www3.towerhobbies.com/cgi-bin...?&I=LXJBE9&P=7

Mike sells the diff output shafts that can be used to put the stock silder style driveshafts on the hb diffs.

http://www.rc-monster.com/proddetail...d=RCMdiffshaft

[sikeston34m]

Ok, here's my parts list that I plan on ordering.

Towerhobbies order

Hotbodies Output Joint Cup(pinion cup)
Stock #LXJBE9 (order 2) ($3.39 each)
Note: Tower is out of stock-Ebay has them

DuraTrax Metal Set Screw Asst. 4mm (12)
Part # LXTW57 ($3.39)

THS Racing Center CVD Set Revo 3.3
Stock # LXRLN4 $37.99

2 - Hot Bodies Spiral 10 tooth pinion
Stock #LXJBM3 ($13.99 each)

2 - Hot Bodies Front/Rear Hardened Diffs (43 tooth spiral ring type)
Stock #LXLGXO ($41.99 each)

Pinion Shims
Stock #LXGPC9 ($3.89 each)

AXI 4120/14 Outrunner Motor (660 kv)
Stock #LXPPX8 ($129.90 each)

Total $279.92


RCM Order

2 - V2 Revo Hybrid Diff Cases $80 each
includes the 6mm output shaft conversions

$160 Total

As you can see, RCM's drop in Hybrid diff is alot cheaper than gathering all the parts. I wonder when he will have those back in stock? If it's soon, I will wait. If not, I'll go this way.

SuicideNeil's post is very helpful on building Hybrid diffs. Thanks Neil!!

http://www.rc-monster.com/forum/show...ht=hybrid+diff

[zeropointbug]

wow you really went all out on that purchase eh.


I can't wait to see the new results.

[zeropointbug]

http://www.greathobbies.com/producti...d_id=EFLM4060A

Have you considered the E-Flite outrunners? I hear they are very well received and have awesome power.

I don't get it, how can you be using a 650kv motor on 6s2p? This SHOULD be getting you over 50mph then?

[sikeston34m]

Originally Posted by zeropointbug

http://www.greathobbies.com/producti...d_id=EFLM4060A

Have you considered the E-Flite outrunners? I hear they are very well received and have awesome power.

I don't get it, how can you be using a 650kv motor on 6s2p? This SHOULD be getting you over 50mph then?

E Flite outrunners look VERY well. They have caught my eye for outrunner setups. Opportunity just presented a deal and I picked this New AXI 4130/20 for $100 shipping included. I thought it was the right thing at the time.

There is a ray of hope for this setup with the lower gears. First I'm going to test the 4130 further. I expect to see the cogging go away, gain some really good low speed driving. It should have explosive acceleration, but not much top end.

The 3520-7 with 650kv does get me over 50mph in the Emaxx with a 4.57:1 final reduction ratio. I once installed a 3530 (don't know how many turns), but on 6S2P A123. It was VERY impressive!! Too bad the drive dog stripped on the transmission output shaft in the very 1st run! I got about 2/3 of the charge out, and it went out. Acceleration was crazy fast and the tires ballooned so much, I never really seen it's top end. Very hard to control, if over anxious with the trigger finger. Top Speed on it had to have been in the 60's. I have another brand new 3530 waiting on the New E maxx to tame.

I decided to shrink my Lipo's in Blue. Now they closely match the Revo Chassis. They are made from 5000mah 10C cells. Each pack 2S2P will give up 100 amps Continuous and allow me 150 amp bursts. I think this 4S Lipo setup will give me all the amps I'm going to pull and more, plus some healthy runtime.

I should be working on making it lighter.

[BL_RV0]

how much does it weigh RTR?

[sikeston34m]

Originally Posted by BL_RV0

how much does it weigh RTR?

Without Batteries, it weighs 9lbs 8 ounces. This is a little heavier than I would like for it to be.

There is alot of material on the battery compartment sides that can go. I think it would be cool to draw out some lettering there that says "E Revo", then remove all the material except the lettering and a border. The compartment bottoms I will leave solid. It's a battery shield and worth the extra weight IMO.

There is some material on the bottom mount that can be removed. Let's not get too carried away though. We don't want it to flex.

The ESC mounting plate can lose some weight. We will leave it solid directly under the ESC to retain the heat sinking.

Each 2S2P 10,000mah Lipo weighs 16.7 ounces each. Isn't this about the same as alot of 7 cell Nimh batts weigh? This puts the truck at 11lbs 9 ounces.

I have a 4 Series 4000mah Lipo setup that weighs 14 ounces for the pair. RTR it would be 10lbs 6 ounces.

[suicideneil]

Hmm, it is a little heavier than I would have expected, but then again those are huge lipos, and that motor is definately a lump; but a nice lump! Where did the battery heatshrink come from, I would like to find some large diameter thin stuff, rather than the really thick stuff Im currently using (traps too much heat from the Nimh cells).

[sikeston34m]

I found a supplier that has a color assortment, but the least you can get is 100 foot rolls of the stuff. PM me for the contact information.

I ordered 4 rolls of the stuff. Red, Black, Yellow, and Blue. The shrank thickness is 4 to 5 mils. It's close to Industry Standard I think.

The flat width is 3 1/4". I was thinking about adding this to my Ebay products. Anyone interested?

This width works for alot of popular sizes. Batteries in the picture from left to right are: A123 4S1P, 6 cell Nimh, 7.4v 2S2P 10000mah lipo, 11.1v 3S1P 4000mah lipo, and the one on the right is 7.4v 2S2P 8000mah lipo.

[sikeston34m]

SuicideNeil, you have a PM

[squeeforever]

Originally Posted by sikeston34m

I found a supplier that has a color assortment, but the least you can get is 100 foot rolls of the stuff. PM me for the contact information.

I ordered 4 rolls of the stuff. Red, Black, Yellow, and Blue. The shrank thickness is 4 to 5 mils. It's close to Industry Standard I think.

The flat width is 3 1/4". I was thinking about adding this to my Ebay products. Anyone interested?

This width works for alot of popular sizes. Batteries in the picture from left to right are: A123 4S1P, 6 cell Nimh, 7.4v 2S2P 10000mah lipo, 11.1v 3S1P 4000mah lipo, and the one on the right is 7.4v 2S2P 8000mah lipo.

I could go for a little of the black...

[BL_RV0]

i could go for some of the blue....

[JThiessen]

I think you should put a little time into "blending" your bottom motor mount. It looks as though it could easily be an impact spot as low as it sits. I'd hate to see you bend it up. I wonder if there is a way for you to attach the stock Revo tranny guard to it?

I didn't get the chance to page back to the beginning of the thread, but did you cut out the motor opening at all? If not, you may be able to do this, and raise the motor just a few mm's (or not!).
Otherwise, great job!

[suicideneil]

Hmm, it seems like getting hold of that heatshrink will be very difficult since I in the Uk- they do ship overseas, but the prices for the rolls big enough for what I want are rather high..... I wouldnt mind some of that blue, 2 metres should be plenty. PM time me thinks.