808 is out! >First conversion gets a prize :-)
 

First guy to post a pic of a converted XRay 808 will get a free custom painted "BL 808" body!

Photoshop won't count :lol:

OOOOhh!!! Daf I may have to take that challenge. I have mine on the way!!!! :mdr:

Good Luck Jeff! :wink:

I won't get one, I'm happy with my TQ.

I need to tidy up the conversion a little:

:lol:


nice try

I am actually rather excited. This will be my first brand new 1/8 kit. Every other I have ever owned have always been purchased used. The first 2 weeks of ownership usually involved the rebuild/recondition of the roller before I could even start the conversion. It will be interesting doing it ground up this time.

I like the white mounts, is that plastic? Also the hidden wiring is very nicely done. That is a large motor!

...and a small battery.

Yeah it's FP's new, 100C, 1200mAH packs! :lol:

I want an E-808....does/will Mike have a motor mount? Unlike many of you guys I don't have the skills to fabricate...

DM

Anyone yet?


MacII, the EC/TQ and 808 center-bulkheads are basically identical. Only the height is different. Mikes mount works with some spacers I'd say. And I'm sure the Monster will do the 808 one too before long.

I'm putting my 1/8th buggy conversion on hold, rather I'm either converting a Revo or buying an E-Revo...however were I doing a buggy, it would be an 808.

I'd love to convert an 808. Probably depends on whether I can bring myself to sell my nitro savage. I am pretty keen to convert a buggy so I have 2 cars to race. I think I'll be more likely to buy a used roller though to keep costs down so I can do the conversion quickly.

Still waiting for the kits to hit the distributor here in the US. Then they need to get shipped to the dealer, and then I will get mine. Its already paid for, just waiting for it to arrive from accross the sea.

They are out all over Europe and most of the rest of the world, they just havent gotten here yet.

They are supposed to arrive at the distributor sometime this week and the get shipped to the hobby shops. If everything goes well, I just might have mine by the begining of May.

What do I win?!!!
 

Well, I am just finishing up my 808 today. What do I win? :party: I apologize ahead of time for the poor pic. I think the photoshopped one earlier is probably better quality. I will snap some more with a decent camera once I get to work tomorrow. This one was with a built in cam on my notebook:no:

I swapped over my setup from the previous XB8/XT8 conversions. This is a MM/Neu 1512 2.5D/Flightpower 4s 5000mAh. The RCM motor mount will work, but it takes some additional work to fit. First, the center diff is offset closer to the right side of the vehicle and this causes the right side guard and chassis to interfere with the motor mount and motor. I removed the third mounting screw/net from the side guard and removed some material from the side guard. I also ran a 1mm bulkhead shim to raise the mount above the chassis' raised edge.

Second, the diff height in the RCM mount is designed to work with the tall center bulkhead of the XB8EC and XT8. The 808 uses a much shorter mount. I couldn't find my spare center bulkhead, so I just used some of the 1mm bulkhead shims from XRAY(#354032) to raise the height even. In fact, I always have used one set of these shims under both bulkhead pieces to raise the motor slightly off the chassis.

In my previous conversions I have tried to use as few custom pieces as possible so anyone else can go out and purchase the same items to do their own. This one is no different. I used the same RCM battery tray, and used two existing holes in the chassis (exhaust pipe mount and engine mount hole) to attached it to the car. I actually use two exhaust pipe mount stands to secure it to the chassis. I also used some foam under the inner edge of the battery tray to keep it secure in the chassis. I have the battery a bit further forward than I would ideally like too, but to use exist holes some compromises were made. I will probably push the battery as far rearward in the box to compensate. This will probably require some setup adjustments compared to a nitro setup, but steering shouldn't be an issue:lol: In addition, I wanted to get the ESC as low on the chassis as possible, and the only spot possible is behind the battery tray.

I will probably get the car on the track this week some time, just need to get the body painted up and mounted. More info to come!

Looks good!!! Some better pics are definitely needed though. I want to see a top view to see how the battery lays out. What motor are you using and gearing are you starting with? The 808 looks to have a much lower overall gear ratio than the old EC and TQ buggies.

Good info on the center dif mount being shorter, I was half expecting that based on the smaller 42T spur and a different part number for the dif mount, so I have an EC center dif mount here waiting for it to use with the RCM mount.

Very interested to hear how it drives. I'm still waiting for my kit to arrive. It should hit the door here on Thursday this week. They just shipped on Friday from the USA distributor to the hobby stores. Then I have to wait until it gets from the hobby shop I ordered from until it gets to my house. I am planning to have mine done next weekend, and I'm really looking forward to it.

Same as you. Just transferring the electronics out of the EC and into the 808.

Any other useful info or tidbits that I might want to be prepared for, or is everything else fairly straight forward?

BTW... I'm very jealous right now.:bad:

Yeah, I am sorry about the pic! I should have some better ones tomorrow. I got mine from the US distributor too; but I work there so I get to measure shipping times in minutes to drive home instead of days to ship! :wink:

The diff height is a pretty easy fix. You can use several shims like I did to raise the 808 mount to match. I think it is about 3mm shorter than the RCM Mount. I will use the XT8 diff mount, #354011, once I find mine! Then I will only have one 1mm shim under each tower to add clearance for the motor. Ideally, I will probably talk to a local buddy to make a new mount that raises the motor relative to the actual diff and the bottom of the mount. If I decide to use the stock steel 42T gear, then I could keep the diff as low as possible in the chassis.

The new gearing for the 808 creates some options/problems. The new gears in the 808 give you a 43/10 ring and pinion. Th stock 808 nitro gearing is 42T/16T for the spur/clutch bell which is a bit taller than the previous XRAYs. This is probably due to the lighter weight and improved acceleration allowing for taller gearing. In the past, I have used the composite 46T diff gears on my XB8 conversion. I have spent most of my time at a small, indoor electric only track, so the metal on metal noise with the stock steel spur gears was pretty obnoxious. If I try to use the 46T gears for the 808, I am going to need to add about 4 teeth to get back to a similar final drive ratio. That would put me at 18/46 for the small 1/10th track I have been running at. For a larger 1/8th track, I may have to go even higher! The problem with this it it puts the motor way out to the edge and clearance with the side guard may be an issue.

Moving the motor out wide may help with the balance though. Currently with the 4s 5000mAh and Mamba Max on the left side, and the 1512 and receiver on the right side, I am heavy on the left! Moving the weight of the 1512 out on the edge may help counter that without placing additional weight to the right. I have also been considering a lighter 3S/1509 combo, and the 808 would probably be a great candidate due to its lighter weight. This would also help with the balance, removing more weight from the left side. The spur gear is currently the limiting factor for how close to the center I can mount battery. If I am will to deal with the noise, dropping to the stock 42, or the optional 41T spur gear will allow me to move the battery closer to the center. I may try this first since it is quite a bit less expensive than a Neu motor and new 3s battery just to test! I could also mount the ESC on an elevated mount off of the center diff, but I would like to keep the CG as low as possible.

As far as build tips, I don't have anything that sticks out. XRAY has released a tip to remove the inner seal on the pinion gear inner bearing. That tip is listed on their site. Other than that, the kit just falls together like all XRAY kits. I usually build my shocks and diffs first so I can get the messy part out of the way! Rocco should be posting his current base setup on the XRAY site if you want a guide to base your initial setup on. He has been working on a good base setup that is easy to drive. The team continues to test and adjust their setups as they get more time with the cars, so that may vary from the kit setup as we continue to learn about the 808. My previous 4S/1512 setup was within a couple ounces of the nitro counterpart, so I was able to use a similar setup to the team with pretty good results.

Bryan

Well, congrats, Backfire! You earned yourself a paintjob!

2 things though:
-I only stock EC/TQ bodies, no 808 yet. The EC bodies are a bit wider. Is this okay for you? (I don't know when I get 808 bodies in)
-I can't promise to do it straight away, still got a couple other bodies to finish first.

If you have no other request, you'll get the same design as Mikes RC8. But with a BL808 logo instead of the RC-Monster one. Watcha think?
http://rc-dc.ch/gallery/displayimage.php?album=18&pos=2

Daf... I'll gladly pay you for a nice painted body, but I will wait untill the 808 bodies come in. I'll run one of my hack paint jobs on the stock shell untill I can get a nice one from you. Actually... now that I think about it, a paint job that would go with the Revo Desert Rat you did for me would be very sweet.:mdr:

let me know if you can get it one the waiting list.

Why yes! Of course I can give an 808 your DesertRat treatment, would be MY pleasure... if only the dollar would rise again. At the moment, for me, selling to the states is not attractive at all. But I'll do it for you anyway, Jeff, always.

I hope JConc or PL will release an 808 body soon... the XRay 808 bodies look hideous, especially when they are unpainted. With the right sceme they look alright.

Drop me a PM Jeff, in a couple days... I'll check when I get the XRay bodies.

Cheers
Daf

Here are a couple more pics of the conversion. You can see the additional shims I had to use with the stock 808 center diff mount. I am swapping the 354011 XT8 mount in the car tonight, so I will only have one shim on each side. Weighed the car today without body, and it was about 7.2lbs. A nitro 808 without body was about 7.1lbs, so they are pretty close with the current equipment. The nitro car did have Crimefighters on it though, so I don't know if those are heavier than the Holeshots I had mounted.

looking good man.

Well done Backfire, looks great

Here is another 808 Brushless Job on RCTECH
http://www.rctech.net/forum/showpost...postcount=5873

Dang drift_buggy... I was just going to post those and here you went and beat me to it. Thats mine.:intello: Ran it today for the first time. LOVE IT. The new 808 just feels like a precision instrument. Absolutely the smoothest, easiest to drive buggy I have ever touched. Freakishly light at only 7.18lbs ready to run with battery and body. Over a full pound lighter than my XB8EC.

I used a EC center diff mount so it was the same height as the RCM motor mount. But I got a note from Mike a day or so ago and he said he has a new Xray mount comming out very soon for the 808. The right height for the lower center dif mounts and slots long enough for low tooth pinions and the 42T center gear. Also a cool new feature will be its 2 piece, meaning that you can take the top half off like the stock diff mounts making it easy to get to the center dif for service without taking out the wholee motor mount and motor assembly like with the current motor mounts. I'll be upgrading when it comes out.:smile:

Specs:
Xray XB808
RC-Monster Xray mount and servo tray
Custom made CF battery tray
Neu 1512/2.5d
Tekin R1Pro
5s 4350mah PQ lipos
Geared 42/15 (about 40mph)

DAF... what does second place get? :whistle: (kidding)


Heres my pics:
http://i66.photobucket.com/albums/h2...8/CIMG3105.jpg
http://i66.photobucket.com/albums/h2...8/CIMG3109.jpg
http://i66.photobucket.com/albums/h2...8/CIMG3110.jpg
http://i66.photobucket.com/albums/h2...8/CIMG3111.jpg
http://i66.photobucket.com/albums/h2...8/CIMG3112.jpg

Like the look of the carbon, nice work

Sortened up some of the excess wire and fitted a body I had on my XB8EC so I could run it today. (Still need to paint the 808 body) I reweighed it after and heres a couple pics of it on the scale.

One picture with the battery totally reay to run. And one without the 5s 4350mah battery.

I still cant get over how light this thing is.

http://i66.photobucket.com/albums/h2...8/CIMG3130.jpg

http://i66.photobucket.com/albums/h2...8/CIMG3131.jpg

Jeff - your could save almost 2.5oz by going for a 1509 I'm sure it would still have enough torque - Also direct solder the motor leads to save the connectors - must be another oz.... That should take you to under 7...

that's a light buggy for sure!

Yea, I thought about getting rid of the connectors, but I prefer the ease of maintenance to be able to just unplug them. Also allows for easier testing of different motors. I tend to tinker quite a bit and swap motors around from model to model just to see what I get.

I do have a Lehner 1930/10 that I was thinking about dropping in to see if it could work. I did have it running in my CEN buggy for a while but ultimately decided that it was just a tad undersized to run cool enough for my liking. But that buggy was around 9lbs so I was thinking I would give it a try in this one considering its almost 2 lbs lighter. It might be perfect and would save me a little over 50 grams. Also, I used a spare EC center dif top plate that is aluminum instead of the 808 one that is plastic. Could probably save 20 grams there and then I could cut the carbon fiber steering servo top plate from the 808 and replace the aluminum one from the RCM conversion and save a little. I could get rid of the ESC mount that I have and mount it flat to the chassis behind the motor and save a little more as well. I just might be able to get there if I try hard enough. But in reality.... its already plenty light. The extra few ounces probably wont make much difference in the real world. At least none that I would be able to notice.

Jeff - how does the 808 compare to the XB8EC?

Also - they've gone to a 42T spur standard? You've gotta be up around 45-48 with that gearing at least, no?

I ran my XB8EC this weekend with the same motor battery combo of 5S on 1512/2.5d with a 15/48 gearing and clocked 47mph when the batteries were fresh.

The motor connectors suggestion was a bit tongue in cheek but the CF top plate & servo mount and chassis mounted ESC sound easy...

With the motor change achieving under 7 lbs sounds like it should come easily without compromising practicality at all.

Go for it... ROAR:whip:

Roar rules are minimum weight of 3200 grams (7.05 lbs.) anyway. Not that this thing conforms to ROAR rules being electric, but its pretty much as light as it needs to be.

The EC is a really nice buggy too. I still love mine. The only problem I ever had with it was it was almost too adjustable. So many difffernt adjustable settings that I didnt know where to start with it. Most of them never got touched cuz I didint know what I was doing with them. The 808 is a bit more simplified as far as adjustments. they say it "optimized" so you dont neeed all of the adjustment. This is good in my opinion. The shocks that Xray did for this buggy are absolutely works of art. Super smooth and finally threaded preload adjusters I havent driven it enough yet to really give a good opinion on how it handles compared to my EC, but the short test runs I did were definately encouraging feeling.

It uses a 42T center gear, but it uses 10/43 truggy ratio difs to make up for the taller center gearing. Its geared for around 40-42 mph now. The small center gear and offset center dif mount is an effort to move the nitro motor closer to the centerline of the chassis. The cool thing is it also allows the battery to move closer to the center.

In reality the 808 and the EC are totally different buggies. There are very few parts that are interchnagable between the 2.

is there room under the body for a 6s lipo pack approximatly 53 mm thick?

With my 4S 5000mAh pack mounted as far forward as possible, I had to place about 2mm in shims below the front body mount to clear the body. I use the RCM battery tray mounted directly to the chassis and side guard. With a custom tray you could lower it a bit, but not much more. The 4s Flightpower pack is listed with the following dimensions: 35MM/44MM/166MM. If I had the battery tray about 2-3cm further back, I would probably not need the shims. But to fit a 53mm tall pack under the body without raising it might be pretty tough. The stock body fits pretty low and snug.

That is so nice. Makes me want one really badly. I might get something a bit cheaper though first.

Depending on what pack you are using you could potentially turn it on its side and have a lower height dimension. I have a 5s 6000mah Polyquest psck that is 54 x 46. Its 54 tall when the cells are flat, but if I turn the pack so the edge of the cells are down its only 46 tall. I made my own tray with 2 sets of screw holes so I could make the tray either 46mm wide of 54 mm wide. It alows me to run my 4350 5s packs for the quialifiers or a 20 minute or less main, and I adjust the tray wider so the 6000 pack fits in in a 54mm wide and 46mm tall configuration if the main is 30 minutes. I needed 3mm under the front body post to make that work, but it looks like it should be good. If this is the size pack you will be planning to run you could have Mike make you a custom trray that is 54mm and just put the pack in on its side to lower the overall height.

The pack I was thinking of using is the neu 30/60c 5000mah 6s, it measures 52.8 x 45.5 x 166 so putting it on its side would be a fair option, I want to get a MMM but I need something to run it in that can handle 6s. I just want to run as many watts as I can through a lightweight platform. I want the best power to weight ratio, I am not sure what I would be better off using a smaller lighter setup like 4s 1512 neu or 6s and 1515 or 1512, or a 3s 1509 setup (on paper a 3s 5000 mah 30c continous pack can put out over 1600 watts)