This is the page for the OLD E-savage Road Boy chassis and a(rough) shock tower. See gcmachine.ca for updates.
Sorry my camera is such a lousy beast. I'... Show morell get a better one some day.
Road Boy on left with standard rotation motors and gearbox, Big Boy on right in reverse rotation format (does both), for comparison. Both 12.4 wheelbase, OLD Road Boy chassis is 2/3 the weight of the same Big Boy components and easily survives the basic bash, but won't tackle the 20 foot ramp with any graces. (The New Road boy will tacke anything.) Big Boy eats the 20 feet by comparison. Road boy lowers ALL components in the chassis. Note the transfer case drives are flat with the diff pinions. Note angle of Big Boy chassis in comparison. (battery trays removed for clarity)
New shock tower geometry here and below, .5 inches lower mounting position than stock, and increased shock drive due to lay down position. Enables use of out-of-box HPI savage aluminum shocks and black springs with no mods. One shock per wheel is less weight, same reaction and good precision and control with 35 wt oil.
Showing suspension travel here. The longer Savage shocks and the new shock tower geometry allow FULL movement of the e-sav suspension. Also note that for a good road race, lowering the ride height with the springs makes the total height of the truck only as tall as one tire, and with the ride height up to stock retains stock ground clearances.
Note body height on new shock towers.
Some under body shots of the new battery trays
This is my favorite creation yet! Time to rip it. Show Less
This page is to outline the specs of my newest creation, the Rock Savvy, a E-savage Crawler. Very interesting, I must say.
This is some comparison shots for... Show more the Rock Savvy and my Road Boy chassis. Same wheelbase. I have never enjoyed the crawlers with the million inch long wheelbase. This is quite adequate.
More comparisons. Truck body is the old Road Boy Chassis.
Rock Savvy left side view and front view.
Rock Savvy rear view.
Rock Savvy easily clears the other truck with room to spare.
I used to think that the stock e-sav had good wheel articulation. Look at these comparisons above. The Rock Savvy will climb 11.5 inches without bottoming out shocks.
Shell off. LR and RR pics here. The only thing from a Sav is the dif cases and arms and shocks. I made the rest. Gearbox is from Evader.
Self standing on the back end. Good weight balance and a good view of the layout here. I used mylar tape to cover the diff hole in the bottom plate.
The twist. Self standing here. I think it's around 80 deg articulation. Very tight 4WS also. By the way, the stock HPI steering servo is more than double the torque and speed of a futaba standard.
Radio: Modified Futaba attack 4 with MCR-4A speed control/reciever.
Servos: 2 Futaba Standard, 1 HPI stock (note that ESC is forward only, and 2nd Futaba servo is for switching FWD,REV.)
Motor: I found these SICK Johnson long body 550's with low RPM and elephant torque.
Battery: stock HPI or Integy matched 3800's
Chassis: purple anodized Aluminum, all aluminum tube links and steering couplers, Traxxas Rod ends.
Gearbox: Duratrax Evader, all-but-locked Ball diff.
Diffs: Stainless steel Spools, stock gears, stock driveshafts
Wheels: Stock E-Sav
Shocks: Stock E-Sav with rubber tube bumper removed.
Of note, the Rock E-tr Emaxx crawler I made (see previous pages) weighs 7.1 lbs running, this Rock Savvy e-Sav crawler weighs 6.7 lbs.
3 Videos below Show Less
This is the E Maxx Crawler Page. This is called the Rock E-ter Chassis, and I am very impressed. Hardwork paid off! NOT FOR SALE.
Some ground clearance mea... Show moresurements here. The interesting thing is because of the 80 plus degree articulation, 3.6 inches of ground clearance is actually ALOT. The e-maxx diffs with this configuration is also more than enough in the front and back.
Some steering pics. Note symmetrical chassis on 2 axis. Total truck weight without motor or battery is 6.3 Lbs. using stock (heavy) tires. Half weight of a stock E.
Truck has such a low CofG that it will sit on the sides of the tires without falling over or getting tippy. Really neat. Also when stood up 90 deg on the front or back wheels, let go and the truck falls to the wheel side, not upside down. More really neat. Wheelbase Nut to Nut is 14 inches exactly. Pic is with tape at tire bottom, and nice curved camera lense.
Will lift one wheel effortlessly 11.5 inches and not even hint of lifting opposite axle. This is a really good setup. This has 4 aluminum savage shocks, 4 e-sav springs, 35 wt oil, and all aluminum tube links and steering. 2 spools, 'Pede center diff and motor mount, and tq-3 reciever. XL-5 speed control. All mounted. Body I used from E-Sav project.Gives better perspective on size. Show Less