Xray XB9
#1156
Lol...thanks, I brought that car back and only just sold it again about a month ago. This XB9 looks the business, I can't wait to get it on the track. I loved the 2010 808, damn thing was like a cadillac on the track. So easy to drive and Xray has to be the only car I've owned, where the last thing I worry about is a broken part.
#1157
Shock Setups
Yes, I remember when I built my 2010spec 808 the manual instructed to install the engine at a slight slant to clear the rear center shaft and for proper spur/clutch bell mesh. The XB9 manual however says to remover material from the engine's crankcase. I really don't see why either approach would be any more or less beneficial than the other...
Now I do have a question, as far as shocks go, what are some good starting point. This being aim at more the us style tracks. I think I'm going to start off with the kit supplied 600cst. (or Losi 45wt.) up front with 1.2, 8 hole pistons and the kit supplied 500cst.(or Losi 40wt.) in the rear with 1.1, 10 hole pistons. I would like to hear from those in the states that have done a bit of suspension tuning.
front: 35wt Losi, 1.3-8 hole pistons, 50% rebound, stock XB9 springs, 103mm c-c, hole #3 on tower, #2 on arm, 28mm ride height.
rear: 27.5wt Losi, 1.2-8 hole pistons, 50% rebound, stock XB9 springs, 113mm c-c, hole #3 on tower, #1 on arm, 29mm ride height.
I've been testing/dialing in my XB9 at Thunder Alley Raceway here in So Cal preparing for round #1 of the 2012 JBRL Nitro Series. This track has a grip of elevation changes with a lot of big air jumps and a couple of lengthy washboard sections (fun, fun, fun) . The above setup has been working awesome with 5-7-2 in the diffs on what I would call a very "US style" track.
#1158
Its actually not two separate approaches as it is required to do both.. mount the engine at a slight angle as dictated by the motor mount slots machined into the chassis as well as removing some material from (chamfer) the inside rear corner of the engines crankcase to ensure there is no contact with the driveshaft.
I'm really happy with my current shock setup which is a fairly typical one here in the US for most buggies although not so much for most of the XRAY setup sheets I've looked at...
front: 35wt Losi, 1.3-8 hole pistons, 50% rebound, stock XB9 springs, 103mm c-c, hole #3 on tower, #2 on arm, 28mm ride height.
rear: 27.5wt Losi, 1.2-8 hole pistons, 50% rebound, stock XB9 springs, 113mm c-c, hole #3 on tower, #1 on arm, 29mm ride height.
I've been testing/dialing in my XB9 at Thunder Alley Raceway here in So Cal preparing for round #1 of the 2012 JBRL Nitro Series. This track has a grip of elevation changes with a lot of big air jumps and a couple of lengthy washboard sections (fun, fun, fun) . The above setup has been working awesome with 5-7-2 in the diffs on what I would call a very "US style" track.
I'm really happy with my current shock setup which is a fairly typical one here in the US for most buggies although not so much for most of the XRAY setup sheets I've looked at...
front: 35wt Losi, 1.3-8 hole pistons, 50% rebound, stock XB9 springs, 103mm c-c, hole #3 on tower, #2 on arm, 28mm ride height.
rear: 27.5wt Losi, 1.2-8 hole pistons, 50% rebound, stock XB9 springs, 113mm c-c, hole #3 on tower, #1 on arm, 29mm ride height.
I've been testing/dialing in my XB9 at Thunder Alley Raceway here in So Cal preparing for round #1 of the 2012 JBRL Nitro Series. This track has a grip of elevation changes with a lot of big air jumps and a couple of lengthy washboard sections (fun, fun, fun) . The above setup has been working awesome with 5-7-2 in the diffs on what I would call a very "US style" track.
#1160
I was given my current setup by Travis Amezcua with the only change being that I went with 27.5wt in the rear rather than the recommended 25wt.
Most of the XB9 setup sheets that I've looked at called for either the same size pistons or larger holes in the rear. So its possible the reason that it works is due to the fact I'm running the 1.2 pistons in the rear which create more pack when landing jumps or hitting the washboards at speed etc.
Here is a link to a short video of JQ on Thunder Alley Raceways current layout.
#1161
Hmm.. Hasn't been a problem so far.
I was given my current setup by Travis Amezcua with the only change being that I went with 27.5wt in the rear rather than the recommended 25wt.
Most of the XB9 setup sheets that I've looked at called for either the same size pistons or larger holes in the rear. So its possible the reason that it works is due to the fact I'm running the 1.2 pistons in the rear which create more pack when landing jumps or hitting the washboards at speed etc.
Here is a link to a short video of JQ on Thunder Alley Raceways current layout.
I was given my current setup by Travis Amezcua with the only change being that I went with 27.5wt in the rear rather than the recommended 25wt.
Most of the XB9 setup sheets that I've looked at called for either the same size pistons or larger holes in the rear. So its possible the reason that it works is due to the fact I'm running the 1.2 pistons in the rear which create more pack when landing jumps or hitting the washboards at speed etc.
Here is a link to a short video of JQ on Thunder Alley Raceways current layout.
I have looked at other setups and they run opposite with 1.2x8 front 1.3x8 rear. And the oil are like 52.5 and 45 versus what you are proposing plus stiffer springs. Hey if it works it works but I tried a 6 hole piston with oil slightly higher and bottomed out especially with those springs.
#1162
Zero Force Xray XB 9 Bearing kit set
#1163
i have been running
1.2 front pistons with 35 wt oil and blue grey springs inside hole on arm third out on tower
1.3 front pistons 37.5 blue grey inside on arm third out on tower .
this is with 8 hole pistons all around car soaks up any bump and will correct its self in air really easy
ride height is 27 front 29 rear
1.2 front pistons with 35 wt oil and blue grey springs inside hole on arm third out on tower
1.3 front pistons 37.5 blue grey inside on arm third out on tower .
this is with 8 hole pistons all around car soaks up any bump and will correct its self in air really easy
ride height is 27 front 29 rear
#1164
Fuel Tank volume
Here is the section from the ROAR Rule Book..
9.2.8 Fuel Tank Specifications:
9.2.8.1 Fuel tanks must be securely mounted.
9.2.8.2 Maximum fuel system capacities are 75cc for .12 engines, 80cc for .15 engines, and 125cc for .21 engines.
9.2.8.3 There are two approved ways to determine the fuel capacity of a vehicle. The first way is by pouring the correct amount into the vehicle's system, and the second way pumps the fuel out of the vehicle's system into a measurement container. The Race Director must ensure that all waste fuel is disposed of properly.
9.2.8.4 To check a tank capacity the first way, drain all fuel from the system including fuel and pressure lines. Pinch off the pressure line at the tank, and disconnect the fuel line from the carburetor. Using a graduated cylinder, measure the proper amount of the driver’s fuel. The graduated cylinder is read at the bottom of the fuel’s meniscus when viewed from the side of the cylinder at eye level. Pour the fuel into the tank, allowing fuel line and filter (if fitted) to fill. The fuel should fill the tank to the top of the filler neck, or to a point where fuel overflows or is forced out when the lid is closed. If it does not, the tank is oversize and a fixed insert must be used to reduce the tank capacity.
9.2.8.5 To check the tank capacity the second way, fill the tank to the top of the filler neck. Make sure all fuel lines are full. Attach a fuel pump or large capacity syringe to the end of the tank-to-engine fuel line. Transfer the fuel completely out of the vehicle's system into a graduated cylinder or another accurate liquid measuring device. (Reading a graduated cylinder is described above, in this rule.) If there is more fuel retrieved than allowed, the tank is oversize and a fixed insert must be used to reduce the tank capacity.
9.2.8.6 A 10 minute cool down period may be allowed for tanks close to the limit (less than 3cc). This decision can only be made by the DRO or Race Director.
#1165
i have been running
1.2 front pistons with 35 wt oil and blue grey springs inside hole on arm third out on tower
1.3 front pistons 37.5 blue grey inside on arm third out on tower .
this is with 8 hole pistons all around car soaks up any bump and will correct its self in air really easy
ride height is 27 front 29 rear
1.2 front pistons with 35 wt oil and blue grey springs inside hole on arm third out on tower
1.3 front pistons 37.5 blue grey inside on arm third out on tower .
this is with 8 hole pistons all around car soaks up any bump and will correct its self in air really easy
ride height is 27 front 29 rear
#1166
Note: In general..
Thinner viscosity oils require a softer spring to ensure the rebound is not too rapid (like a pogo stick).
-likewise-
Thicker viscosity oils require a stiffer spring to ensure the rebound is not too sluggish.
Given this general rule..
27.5wt with a 1.2-8 hole piston will (does) work well with the silver spring.
-likewise-
37.5wt with a 1.3-8 hole piston is likely to work well with the blue-grey spring.
There is a lot of information that can be found here on RC Tech. Personally I just take what I can use and leave the rest. But you certainly won't ever find me discounting information that others have shared here, especially, unless or until I have first hand experience to the contrary. Nor will I ever be posting any information stating that something works well unless or until I have first hand knowledge through personal experience that it does work well.
I'm just sayin'...
Thinner viscosity oils require a softer spring to ensure the rebound is not too rapid (like a pogo stick).
-likewise-
Thicker viscosity oils require a stiffer spring to ensure the rebound is not too sluggish.
Given this general rule..
27.5wt with a 1.2-8 hole piston will (does) work well with the silver spring.
-likewise-
37.5wt with a 1.3-8 hole piston is likely to work well with the blue-grey spring.
There is a lot of information that can be found here on RC Tech. Personally I just take what I can use and leave the rest. But you certainly won't ever find me discounting information that others have shared here, especially, unless or until I have first hand experience to the contrary. Nor will I ever be posting any information stating that something works well unless or until I have first hand knowledge through personal experience that it does work well.
I'm just sayin'...
#1167
Note: In general..
Thinner viscosity oils require a softer spring to ensure the rebound is not too rapid (like a pogo stick).
-likewise-
Thicker viscosity oils require a stiffer spring to ensure the rebound is not too sluggish.
Given this general rule..
27.5wt with a 1.2-8 hole piston will (does) work well with the silver spring.
-likewise-
37.5wt with a 1.3-8 hole piston is likely to work well with the blue-grey spring.
There is a lot of information that can be found here on RC Tech. Personally I just take what I can use and leave the rest. But you certainly won't ever find me discounting information that others have shared here, especially, unless or until I have first hand experience to the contrary. Nor will I ever be posting any information stating that something works well unless or until I have first hand knowledge through personal experience that it does work well.
I'm just sayin'...
Thinner viscosity oils require a softer spring to ensure the rebound is not too rapid (like a pogo stick).
-likewise-
Thicker viscosity oils require a stiffer spring to ensure the rebound is not too sluggish.
Given this general rule..
27.5wt with a 1.2-8 hole piston will (does) work well with the silver spring.
-likewise-
37.5wt with a 1.3-8 hole piston is likely to work well with the blue-grey spring.
There is a lot of information that can be found here on RC Tech. Personally I just take what I can use and leave the rest. But you certainly won't ever find me discounting information that others have shared here, especially, unless or until I have first hand experience to the contrary. Nor will I ever be posting any information stating that something works well unless or until I have first hand knowledge through personal experience that it does work well.
I'm just sayin'...
#1168
XB9 fuel tank capacity
So to ensure my buggy would pass I went ahead and checked my XB9 which has no tank plugs and no inline filter installed, with the fuel tubing routed exactly as shown on page 38 of the XB9 manual then filled to maximum capacity. The pic below shows the results.
#1169
Tech Addict
iTrader: (1)
Brandon... your question reminded me that at this weekends season opener for the JBRL they require all vehicles to go through and pass a tech inspection prior to every race, qualifiers and mains. With the top 3 finishers from every race being required to go directly to a post race tech inspection where they test the fuel capacity for each vehicle per ROAR Rules.
So to ensure my buggy would pass I went ahead and checked my XB9 which has no tank plugs and no inline filter installed, with the fuel tubing routed exactly as shown on page 38 of the XB9 manual then filled to maximum capacity. The pic below shows the results.
So to ensure my buggy would pass I went ahead and checked my XB9 which has no tank plugs and no inline filter installed, with the fuel tubing routed exactly as shown on page 38 of the XB9 manual then filled to maximum capacity. The pic below shows the results.