XRAY - Model racing cars

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PostPosted: Fri Apr 25, 2008 14:53:51 
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Joined: Sun Jul 15, 2007 13:49:07
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Location: Iowa/USA
OK oli, I agree about the droop, 4mm is way too much!!! The shocks aren't going to help that.


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PostPosted: Fri Apr 25, 2008 21:01:00 
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Joined: Tue Jun 26, 2007 04:14:28
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Location: San Antonio, Texas
Excellent thread, great pictures!!


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PostPosted: Sat Apr 26, 2008 03:09:12 
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Joined: Fri Apr 20, 2007 15:39:33
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Location: FLorida
Guys what tires are you all using to break in the engine? Because if you use the same tires that you will take to the track the tires will be wear down after you break in the engine. Unless you break in the motor in the track. I like to break in the engine in a park with time.. Can XT8 tires be place on the Xb808 and use that instead of my Team Cobra tires??




thanks
felix


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PostPosted: Sat Apr 26, 2008 03:33:09 
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Location: Houston
I always save my worn out tires and use them for break in and extended tuning sessions on the street.


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PostPosted: Sat Apr 26, 2008 17:11:04 
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Location: Castle Rock, WA
Same here, I just dig out some old hoops at the bottom of the tire bag and use those.


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PostPosted: Sun Apr 27, 2008 04:12:08 
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Joined: Fri Apr 20, 2007 15:39:33
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Location: FLorida
Guys does the XB808 comes with the front mud guards??

It doesn't. Branham and I made our own out of some scrap lexan off of a body.


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PostPosted: Sun Apr 27, 2008 06:45:57 
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Location: Iowa
+1 or even the rear mud guards. Another thing I was wondering. Would you want to put in small screws in the arms to seal the holes . This would prevent mud or dirt filling the holes. Making it easier to install the guard later on.


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PostPosted: Sun Apr 27, 2008 06:47:22 
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Location: Fresno Ca
Shooky wrote:
+1 or even the rear mud guards. Another thing I was wondering. Would you want to put in small screws in the arms to seal the holes . This would prevent mud or dirt filling the holes. Making it easier to install the guard later on.


Yes.... 8)


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PostPosted: Sun Apr 27, 2008 12:32:46 
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Joined: Wed Nov 08, 2006 11:52:03
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Location: Sweden
The pictures does not work for me.


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PostPosted: Sun Apr 27, 2008 15:28:17 
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Location: Richmond, Ontario, Canada
Oli, what happened to your pictures?


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PostPosted: Sun Apr 27, 2008 22:29:48 
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Location: Fresno Ca
Does the 808 come with the front & rear mudd guards?


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PostPosted: Mon Apr 28, 2008 11:04:31 
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Location: UK
Steve Walters wrote:
Does the 808 come with the front & rear mudd guards?


Nope


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PostPosted: Mon Apr 28, 2008 11:05:20 
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Steve Walters wrote:
Does the 808 come with the front & rear mudd guards?


My hosting had a bandwidth limit, so I'm moving it to another company as we speak. Should be sorted by the end of the day.


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 Post subject:
PostPosted: Mon Apr 28, 2008 12:49:09 
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I have a set of EC shocks rr/fr
will they be ok as spare 808 shocks or not ?

or will the 808 shocks go onto the xb8's ???


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PostPosted: Mon Apr 28, 2008 18:18:55 
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Managed to get a bit more of the car built in between racing over the weekend, and now just have the shocks left to do this evening. It's pretty impressive how close they've managed to get things on the chassis.

The front end fully built up with the turnbuckles installed. Notice the new XT8 style outer turnbuckles.
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Pretty standard centre diff mount components. The top plate is moulded composite and is actually fairly stiff, although I have to say I think this should be carbon fiber/ graphite. One thing you will notice is that nearly all aluminium parts are hard anodised (bar the engine mounts) and all steel components are finished in the lovely bronze Hudy finish.
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Remember to sand one side of the brake pad plates with emery cloth to provide a key for the pads.
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XRAY have at last changed the shape to give more room of the brake mechanism.
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The centre diff installed. As you can see, the rear drive shaft is damn long!
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The chassis side guards are exactly the same size as the previous ones, just the radio tray side one has been changed to make room for the protruding servos. The one and only thing that I've come across so far that seems slightly cheap is this side guard, as it's clear they've just modded the old mould as you can see just half of the XRAY logo at the front of it. Nothing major I know, just feels slightly not perfect and bodged. They are also just very slightly too short for the chassis.
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At this point I chose to install the electrics instead of the engine. The radio tray components. Nice bit of machining the radio plate, and notice they removed some material from the battery cover to make room for the carb slide!
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The electrics I'm using...
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Everything assembled and ready to be mounted to the chassis. Couldn't install my pt as I needed it on Sunday.
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The electrics installed.
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You've gotta love how the drive shafts perfectly follow the line of the battery box and steering servo!
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These are the second components I feel XRAY have slightly scrimped on (as they did with the XT8). Although they are nicely machined underneath to remove a considerable amount of weight, they are not hard coated as everything else on the car is. I know it's nothing major, just feels a bit cheap.
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The clutch assembly/ bell and mounts installed on the engine. The mounts are really long, so even though there's not going to be an extension on the 3 piece mount, the overall length of the mounts will add some rigidity to the centre of the chassis.
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Notice the new size of the bearings; I've still yet to get any decent sized washers to secure the clutch bell/ bearings, but they now supply you with a 2.5mm CAP SCREW!
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The engine and pipe installed. Everything is very tightly packed together; the engine couldn't get much closer to the rear drive shaft! It's also quite clear the centre diff and engine are not perpendicular, although you can reduce the angle by moving the rear of the engine towards the centre drive shaft.
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Bring on the shocks at last!


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PostPosted: Mon Apr 28, 2008 18:30:44 
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Joined: Fri Nov 10, 2006 06:18:49
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Location: Houston
Nice review Oli! Can you clarify what you meant by this:

"XRAY have at last changed the shape to give more room of the brake mechanism. "


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 Post subject: Sanding the Carbon Fiber
PostPosted: Mon Apr 28, 2008 18:31:20 
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Joined: Mon Apr 28, 2008 18:25:09
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Location: Plano, Texas
Ok I noticed in the build book it discusses sanding the Carbon fibre pieces and using CA to "seal" the edges.

What is the best technique for doing this without gluging your hand to the table or your eyelid shut?

Are people sanding the edge rounded or flat?

Thanks in advance.


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PostPosted: Mon Apr 28, 2008 18:41:08 
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dbarnes wrote:
Nice review Oli! Can you clarify what you meant by this:

"XRAY have at last changed the shape to give more room of the brake mechanism. "


I think this depends on what engine you run, but many people have found in the past you either have to undesirably angle the carb, or file away a bit of material from the corner of the battery cover to get clearance between the carb barrel and cover. If you look at the last photo you can see they've removed some material to give ample clearance.


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 Post subject: Re: Sanding the Carbon Fiber
PostPosted: Mon Apr 28, 2008 18:52:47 
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tkemory wrote:
Ok I noticed in the build book it discusses sanding the Carbon fibre pieces and using CA to "seal" the edges.

What is the best technique for doing this without gluging your hand to the table or your eyelid shut?

Are people sanding the edge rounded or flat?

Thanks in advance.


You just need to lightly sand it to remove any sharp edges. I didn't spend long sanding mine at all as they were very smooth. If you look back through the photos I've taken you'll see I made a 'pot' out of aluminium foil and used a cotton wool bud to apply the CA. I did it one piece at a time, but to make things easier you could do the inner cutouts first and leave the parts to dry before doing the edges. It dries really quickly as it is absorbed into the grain of the carbon fibre.


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 Post subject:
PostPosted: Mon Apr 28, 2008 18:57:16 
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Joined: Fri Nov 10, 2006 06:18:49
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Location: Houston
Oli wrote:
dbarnes wrote:
Nice review Oli! Can you clarify what you meant by this:

"XRAY have at last changed the shape to give more room of the brake mechanism. "


I think this depends on what engine you run, but many people have found in the past you either have to undesirably angle the carb, or file away a bit of material from the corner of the battery cover to get clearance between the carb barrel and cover. If you look at the last photo you can see they've removed some material to give ample clearance.


I'm not talking about the reference to the battery cover and the carb slide. You had a pic of the diff and brakes and said there was something different there. Later on you mentioned the battery cover and the slide. Were you referring to the same thing both times?


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