HPI_rips

iTrader: (2)

heres the ob4 thread post pics and talk about ur ob4s here.

ozzie boy

sweet pic!

well soon ill be gettin my ob4

eclipse gsx

Hey guys remember me , now we got two forums going.I just enterd this forum today.

ozzie boy

well lets see i use traxxas hpi imcc this one maxxtraxx(not anymore) and dotr

Chico

iTrader: (17)

Hey Guys, I recently bought a used OB4, and I noticed that the belt to the rear of the car is real loose, and when I spin the wheels real fast I can hear the rear belt skipping. Do they make a rear belt tensioner for that belt, or is my belt just to old and time to but a new one. Its the small belt behind the motor.

ozzie boy

no i dotn think ther is a rear belt tensioner avable.
yeah it would be a good idea to get a new belt for it

Ryan C

hello

Um there is no rear belt tension as you dont need did you get the instructions with it??

what ya actually do is. the diff is seated in 2 plastic side peices that go throught the uprig=hts that are bolted to the chassie.

you need to undo the whole rear end and then you can like turn the diff to the rear and you increase the tension on the belt

its a built in tensioner. no need for the upgrade cost (well there is no other option.

stink thing is that the whole rear needs to be pulled apart

Ryan

ozzie boy

TTT

jvjave

Anybody out there running the front one-way. And if so what type of rear diff are you running for a big track like Crystal Park or Revalations in SoCal.
Thanks,
jvjave

CRAZY SPEED

I HAVE THE GM ONE WAY AND FOR THE REAR I USE BALL DIFF OR 50,000 WEIGHT 3/4 FULL GEAR DIFF.ALSO BETTER IF U CHANGE THE SHIFTING FROM 4TOOTH DIFFERENCE TO 3 TOOTH DIFFERENCE.I USE WHITE AND PINK WITH 15/18 PINION.SMOOTHER SHIFTING.

Foger Rox

Hey guys, there is an older Ob4 thread here, but glad to see you guys step up to the better forum ! ! !
If you are at Crystal Park look up Steve from Ofna. Sometimes he's there with his Ob4, Glitch has run into him.
Crazy is right about the f/1way and ball diff. I prefer the oil in the rear diff, less maint. If you can run 20 sconds or less, you can run a 15-19 with a 1+ Horsepower motor @ Crystal Park, set your shift late so only on the straight do you see 2nd gear.
Ryan, you dont have to take the whole rear apart. Upper deck screws, shock tower, dampener, and one diff block. Make sure the adjustment rings are set in the same notch, left & right. Dont tighten the belt a lot, just so it doesnt slip. The belts are kevlar and you dont want to stretch them, then they are going to get looser till they break.

CRAZY SPEED

WHAT setups are you guys running on foams.

Heres mine:

Front

camber - 0.5
toein 0.5
caster to front
Trinity yellow very hard spring with sway bar
Ellegi F
One way
2mm droop
oil 70w
Rear

camber - 1.5
toein 1.5
Ellegi A
integy green spring
oil 60w
3mm droop

NOVA MEGA SX12T MS modified powerplant.

ozzie boy

i use foams
i have basically the same setup u have there but in the rear im runnin the blue springs

Ryan C

Hey

Heres a question for you guys.

im using the force motor that comes with these ob4. and am just at the stage of putting the motor in after a rebuild and have put the new force motor in. i notice that the brake disk and the flywheel are almost touching each other is there suppose to be a tiny as gap here? or is it supoose to be a bit more of a gap??

Thanks for any help.

Ryan

Chico

iTrader: (17)

Does anybody know what the part # is for the the belt setup, so that the belt is routed on the left side of the car istead of the right side buy the spur gears is. Also, anybody know anyone who has this kit in stock.