Go Back  R/C Tech Forums > General Forums > Electric Off-Road
PR Racing SB401 4wd Off Road Buggy >

PR Racing SB401 4wd Off Road Buggy

Like Tree89Likes

PR Racing SB401 4wd Off Road Buggy

Reply

Old 09-18-2014, 05:39 PM
  #16  
Tech Master
iTrader: (55)
 
joelwhite's Avatar
 
Join Date: May 2008
Posts: 1,853
Trader Rating: 55 (100%+)
Default

Originally Posted by Rickybob View Post
Looks like another copy of the b44, what makes this car better?
Just curious why people say this. If you go by the basics, arms shocks, tie rods and such, every one of these cars is the same. So Im not sure how its a copy? I just hear this alot and wonder why folks think it. They are all different really, but use the same principals on all of em.
joelwhite is offline  
Reply With Quote
Old 09-18-2014, 06:28 PM
  #17  
Tech Legend
iTrader: (253)
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 31,294
Trader Rating: 253 (100%+)
Default

honestly I think people are wanting something to be really different than the current accepted layout, like say a battery down the middle, etc. whatever makes it truly look different.
Cain is offline  
Reply With Quote
Old 09-18-2014, 07:30 PM
  #18  
Tech Addict
iTrader: (28)
 
MaricopaAgent's Avatar
 
Join Date: Mar 2014
Location: Maricopa, Az
Posts: 665
Trader Rating: 28 (100%+)
Default

Actually looks A LOT like a Xray with some upgrades and engineered variations..

Could be interesting..

Not sure how this remotely resembles a 44?
MaricopaAgent is offline  
Reply With Quote
Old 09-18-2014, 07:36 PM
  #19  
Tech Prophet
iTrader: (83)
 
Wildcat1971's Avatar
 
Join Date: Apr 2012
Location: Arizona
Posts: 17,257
Trader Rating: 83 (100%+)
Default

Originally Posted by MaricopaAgent View Post
Actually looks A LOT like a Xray with some upgrades and engineered variations..

Could be interesting..

Not sure how this remotely resembles a 44?
yeah it kinda does. even in the arms
Wildcat1971 is offline  
Reply With Quote
Old 09-18-2014, 08:36 PM
  #20  
Tech Master
iTrader: (18)
 
Coppercanyon's Avatar
 
Join Date: Jul 2008
Posts: 1,020
Trader Rating: 18 (100%+)
Default

Originally Posted by Rickybob View Post
Yea your right, it's a total pos, nobody's ever won any world championships with it!!! I agree it is very fragile but my point is you cannot tell the how durable it is just from pictures, and it's a given that there will be very little parts support nationwide. Now get off your mommys computer before she catches you and whips your little ass!
If your comparing it to a B44 it will be more durable first off because it had gear diffs. Now the B44.3 will have gear diffs also but hasn't been released yet either so a durability comparison is impossible
Coppercanyon is offline  
Reply With Quote
Old 09-18-2014, 10:07 PM
  #21  
Tech Champion
iTrader: (11)
 
Join Date: Jun 2008
Posts: 5,063
Trader Rating: 11 (100%+)
Default

FYI, There is plenty of parts support, not only will I be stocking this car I also own a PRS1 2wd buggy and I'm a racer as well. The 2wd buggy is amazing so I would guess this 4wd buggy will be also... I can't wait to test it against my current wheeler I run
bring it on is offline  
Reply With Quote
Old 09-19-2014, 05:57 AM
  #22  
Moderator
Thread Starter
iTrader: (7)
 
BloodClod's Avatar
 
Join Date: Sep 2001
Location: RC Drifter
Posts: 9,571
Trader Rating: 7 (100%+)
Default

Let's stay focused on the SB401 shall we?

PART TWO...

Next up the front and rear diffs are installed into the differential cases. The inner bearing for the input pinion shaft is larger and should last a long time. PR Racing also provides shims to shim the differential inside the gearbox. Use sufficient shims to prevent any side to side play of the differential in the gearbox and add shims to the ring gear (the large gear) side if there is too much play between the ring and pinion... just a bit of play for smooth rotation will be sufficient.


(larger image)


Here's the front gearbox installed on the chassis. The front of the gearbox is removable so by taking out 6 screws you will be able to access the differential for servicing and oil changes! Also check out that beefy 4mm carbon fiber shock tower.


(larger image)


The universal driveshafts are installed next. The front driveshafts use a C-clip to secure the universal pins whereas the rear pins are captured in the oversized hub bearings. The shafts are beefy and went together very well with no slop and no binding.


(larger image)


The front arm and steering assembly are assembled next. Arms are beefy and include droop screw holes but unfortunately the chassis has no supports for the droop screws so droop can't be set that way (perhaps a future upgrade?). Hingepins are solid 3mm and captured by tiny screws on the outer part of the arm.

Height of the steering spindle can be adjusted with included collars and the wheelbase can also be adjusted with the spacers on the inner hingepins. I found the spacers just a tad too thick and a few rounds on 600grit sandpaper made it fit just right.


(larger image)


The car comes with a full set of 4 aluminum hingepin blocks (front and rear) anodized black. These are well made and should not have any durability issues.


(larger image)


The arms are installed on the chassis and front kick-up is adjustable with the included shim. A tiny bumper doesn't protect much more than just the front hingepin block. I'm not a fan of these tiny bumpers but they seem to be the trend these days.


(larger image)


Entire front assembly mounted. The car comes with 14mm aluminum hexes that are attached to the axle via a 3mm setscrew. The front are nicely machined for some weight savings too. Also included in the kit are a set of 12mm plastic hexes should you prefer to run 12mm wheels.

For the record, Durango front wheels fit perfectly on the car but unfortunately Durango rear wheels do not fit on the rear axles as the axles are too short and hence do not extend far out enough to install the locknut.

The car features burly steel turnbuckles all around. Build tip - GREASE the turnbuckles before threading into the rodends! The rodends themselves seem to be very durable and to be honest are extremely hard to "pop" onto the balls - PRO = they are unlikely to pop off when you are racing that important run, CON = if they do pop off, it's unlikely they are going to be easy to pop back on again...


(larger image)


The rear gearbox ready to be installed. PR has cleverly designed the front and rear to use the same gearbox casings so you can save on the spares you have to keep. Rear shock tower is 4mm thick. It features only 2 holes for shock tuning and that does seem less than most other cars... but hey, if the geometry is right perhaps I don't need more than 2!


(larger image)


Another shot of the rear gearbox showing the beefy wingmounts. The wing will be held on with screws (no wimpy snap pins here lol!). Like the front, the differential can be accessed by simply removing 6 screws from the gearbox.


(larger image)

Will update this post as the build progresses.
BloodClod is offline  
Reply With Quote
Old 09-19-2014, 06:44 AM
  #23  
Moderator
iTrader: (150)
 
WYLDTHING's Avatar
 
Join Date: Jan 2004
Location: Justa passin through.......
Posts: 4,593
Trader Rating: 150 (99%+)
Default

Once again I find myself deleting off-topic posts.

If you all want to debate whether the b44 is good or not, then do it on the B44 thread, or through PM's, NOT here.

In case you hadn't noticed, this is not a B44 thread. Please stay on topic.

Thanks for your cooperation.
WYLDTHING is offline  
Reply With Quote
Old 09-19-2014, 07:10 AM
  #24  
Tech Master
iTrader: (18)
 
Join Date: Apr 2010
Posts: 1,921
Trader Rating: 18 (100%+)
Default

Looking good. Any idea what the MAP will be?
iTz Nicholas72 is offline  
Reply With Quote
Old 09-19-2014, 07:28 AM
  #25  
Tech Regular
iTrader: (7)
 
Join Date: Jul 2012
Location: Gold Coast
Posts: 304
Trader Rating: 7 (100%+)
Default

Originally Posted by Rickybob View Post
Looks like another copy of the b44, what makes this car better?
they are so different.
L.DENG is offline  
Reply With Quote
Old 09-19-2014, 07:39 AM
  #26  
Tech Addict
iTrader: (28)
 
MaricopaAgent's Avatar
 
Join Date: Mar 2014
Location: Maricopa, Az
Posts: 665
Trader Rating: 28 (100%+)
Default

who sells these?

what about configurations? 6 are mentioned. Saddle packs are out here, everyone runs shorty's. But the shorty configuration I see is motor forward, battery back. Is there a way for motor and battery back?

be interesting to see the weight also..
MaricopaAgent is offline  
Reply With Quote
Old 09-19-2014, 07:45 AM
  #27  
Tech Regular
iTrader: (18)
 
Join Date: Jan 2013
Location: Mechanicsville, MD
Posts: 250
Trader Rating: 18 (100%+)
Default

One thing that I find interesting is that to adjust wheel base, instead of moving hub location on the outer hinge pin, the entire arm is moved forward or back via the plastic spacers on the inner hinge pins.
BensPro2 is online now  
Reply With Quote
Old 09-19-2014, 07:48 AM
  #28  
Tech Addict
iTrader: (28)
 
MaricopaAgent's Avatar
 
Join Date: Mar 2014
Location: Maricopa, Az
Posts: 665
Trader Rating: 28 (100%+)
Default

Originally Posted by BensPro2 View Post
One thing that I find interesting is that to adjust wheel base, instead of moving hub location on the outer hinge pin, the entire arm is moved forward or back via the plastic spacers on the inner hinge pins.
just like an Xray

diff work is super easy too..
MaricopaAgent is offline  
Reply With Quote
Old 09-19-2014, 08:03 AM
  #29  
Tech Addict
iTrader: (8)
 
Join Date: Apr 2011
Location: Marietta, GA
Posts: 584
Trader Rating: 8 (100%+)
Default

Originally Posted by MaricopaAgent View Post
who sells these?

what about configurations? 6 are mentioned. Saddle packs are out here, everyone runs shorty's. But the shorty configuration I see is motor forward, battery back. Is there a way for motor and battery back?

be interesting to see the weight also..
HobbyPro USA will be offering these. They also tend to make a few small changes to the car to suit US tracks. Although they might not make any changes to this one. We'll see if they do that to this car.
rcgerber is offline  
Reply With Quote
Old 09-19-2014, 08:45 AM
  #30  
Tech Prophet
iTrader: (83)
 
Wildcat1971's Avatar
 
Join Date: Apr 2012
Location: Arizona
Posts: 17,257
Trader Rating: 83 (100%+)
Default

Originally Posted by MaricopaAgent View Post
who sells these?

what about configurations? 6 are mentioned. Saddle packs are out here, everyone runs shorty's. But the shorty configuration I see is motor forward, battery back. Is there a way for motor and battery back?

be interesting to see the weight also..
Wildcat1971 is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service