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Old 02-05-2017, 02:42 AM
  #46  
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Originally Posted by My ST-RR EVO View Post
What's the deal with the new rear hubs? Any geometry change there?
D815 with stock plates on left. E817 with stock plates on right.
Attached Thumbnails Hotbodies D817 Nitro thread-d815-rear.jpg   Hotbodies D817 Nitro thread-d815-rear2.jpg  
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Old 02-05-2017, 04:59 AM
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Originally Posted by TrickyMick View Post
Just out of interest. The E817 uses a stock length chassis where as the New D817 has the plus 4mm Chassis
So, basically it's almost the same geometry If you keep the same chassis, you'll have D816 lol. Ronnefalk mentioned the bulkhead is stronger and D block is different but still 3.0 degrees. Here's the list to make your D817: 204009, 204012, 204015, 204016, 204017, 204018, 204027, 204028, 204032, 204037, 204040, 204047, 204048, 204135 (stickers lol), 204139, 204140, 204141. I'm going to get these as soon as they are available, except the chassis and chassis guard.
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Old 02-05-2017, 05:14 AM
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this is what i understand a few week ....the 3 holes of camber link are one hole more outside , i made a camber plate like it but i need to modify the hub because i can't place the camber link in the new outside hole . the plate hole E817 hub are different .
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Old 02-07-2017, 03:18 AM
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Questions??

Originally Posted by SEF View Post
I wasn't expecting much of a change. After building my E817, I've essentially have seen all the changes except for the unis. I'm intrigued by the different unis for the front and rear. I didn't know that was the route HB decided to go, as opposed to having the same unis front and rear and changing the inner bearing of the rear hubs.
Can anyone else confirm that the HB uni's are 94.5(?)mm front and 91.5mm rear or are the same length (91.5mm) F/R but with differing axle length/designs to suit

This would mean the rears are not too different from the Mugen E2218 uni's (also 91.5mm) which worked on the D812 rear hubs and the M2C Racing D815 hubs with 8x16x5 inner bearing... just tweaked to work with the large inner bearing on the rear hub...

Just an observation.


Last edited by TRiN; 02-07-2017 at 03:35 AM.
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Old 02-07-2017, 03:51 AM
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Originally Posted by manup20 View Post
i made a camber plate like it but i need to modify the hub because i can't place the camber link in the new outside hole . the plate hole E817 hub are different.
Well that's a bummer

Do you happen to know what D815 plate # would be the same height as the #3 E817 plate camber-link hole positions? D815 plate #5 perhaps?

Looking at the pics posted by TrickyMick, the E817 #3 plate camber-link hole positions appears higher than the #3 D815... though this could just be the hub height deceiving my eyes...
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Old 02-07-2017, 03:51 AM
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Any information on why these are an Option Part?

HB-204053 HB RACING B-mount +1.4 817 series
HB-204054 HB RACING B-mount +2.8 817 series
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Old 02-07-2017, 03:57 AM
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Originally Posted by TrickyMick View Post
Any information on why these are an Option Part?

HB-204053 HB RACING B-mount +1.4 817 series
HB-204054 HB RACING B-mount +2.8 817 series
Nice find, so this would explain what's on those setup sheets...

I had originally imagined it was a matter of throwing some washers somewhere in-between to get the clearance and noting down a figure...
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Old 02-07-2017, 04:37 AM
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Originally Posted by TRiN View Post
Well that's a bummer

Do you happen to know what D815 plate # would be the same height as the #3 E817 plate camber-link hole positions? D815 plate #5 perhaps?

Looking at the pics posted by TrickyMick, the E817 #3 plate camber-link hole positions appears higher than the #3 D815... though this could just be the hub height deceiving my eyes...
Sorry for the shitty photos TRIN, but the D815 hubs have the #5 plates and the E817 the #3 plates and I had different Hub bushes in.

I've tried to take better photos of the hubs to give you an idea of the difference between the 2 with the same hub bushes in.

D815 on left with #5 plates, E817 on right #3 plates

But if you put the 2 dots down bushes in the D815 Hubs and the 1 dot down in the E817 Hubs, you get the same height, but the outside hole of the E817 Hubs with the #3 plates is 1.5mm further out.
Attached Thumbnails Hotbodies D817 Nitro thread-hub.jpg   Hotbodies D817 Nitro thread-hub2.jpg  

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Old 02-07-2017, 10:30 AM
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Originally Posted by TrickyMick View Post
Sorry for the shitty photos TRIN, but the D815 hubs have the #5 plates and the E817 the #3 plates and I had different Hub bushes in.

I've tried to take better photos of the hubs to give you an idea of the difference between the 2 with the same hub bushes in.

D815 on left with #5 plates, E817 on right #3 plates

But if you put the 2 dots down bushes in the D815 Hubs and the 1 dot down in the E817 Hubs, you get the same height, but the outside hole of the E817 Hubs with the #3 plates is 1.5mm further out.
Best comparison pics yet! Thanks for the clarification!

So Ronnefalk and Ty used #4 plates with the 817 hubs in some of their more recent setup sheets including the Ifmar Worlds with either 1 dot down or 2 dots down.

If I got it right, the 817 series hub with #4 plates using 2 dots down is equivalent to the D815 hubs with #5 plates using 2 dots down in height/camber-link hole locations minus the outer hole camber-link location. While Ty used the outer most camber-link position on the 817 hub, Ronnefalk preferred the middle hole.

I'll note, the 817 series hub also has #5 plates which goes a little higher again

The outer hole camber-link location some might be able to replicate, but there will be clearance issues as mentioned by manup20 a couple of posts up with some modding needed. The 817 series hub on the top section is much more angle where the screws for the plates goes in...

However, what I think the biggest difference that separates the two hubs is that the D815 hub won't be able to replicate the lower axle height/dog bone plunge angle from the 817 series hub which looks like at least a 1-2mm difference. I'm guessing this is where most of the extra rear traction is coming from due to the 'binding' effect, meaning more on throttle traction.

On another note, came across this, HB-204146 HB RACING Screw type shock pin set (LHx2 / RHx2). I know some had problems with the set screw in the a-arm backing-out, with the shock pin following suit. Use this for the ultimate reliability!

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Old 02-07-2017, 02:25 PM
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Originally Posted by TRiN View Post
Can anyone else confirm that the HB uni's are 94.5(?)mm front and 91.5mm rear or are the same length (91.5mm) F/R but with differing axle length/designs to suit
Answering my own question, the HB uni's are indeed 91.5mm in length F/R if the links below have accurate descriptions:-

https://www.rcplanet.com/hb-racing-r.../hbs204015.htm

https://www.rcplanet.com/hb-racing-f.../hbs204016.htm

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Old 02-12-2017, 12:16 AM
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Interesting to see Ronnefalks front shock tower only has 4 holes.

http://www.circusrc.com/2017/02/zoom...vid-ronnefalk/

The part number in the Manual 109852 is the same as the D815.

But I then notice the setup sheets at the end of the Manual show only 4 holes in the front tower>
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Old 02-12-2017, 01:44 AM
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Originally Posted by TrickyMick View Post
Interesting to see Ronnefalks front shock tower only has 4 holes.

http://www.circusrc.com/2017/02/zoom...vid-ronnefalk/

The part number in the Manual 109852 is the same as the D815.

But I then notice the setup sheets at the end of the Manual show only 4 holes in the front tower>
Looks like no more outer-most hole... to match the 4-holes on the option low rear carbon shock tower...

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Old 02-12-2017, 02:02 AM
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And his Front Caster Blocks seem to be made up of parts instead of a solid unit?
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Old 02-12-2017, 02:54 AM
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Originally Posted by TrickyMick View Post
And his Front Caster Blocks seem to be made up of parts instead of a solid unit?
Could be the poor finish on the machining enhanced by the lighting.
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Old 02-13-2017, 12:52 AM
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Exclamation HB Racing D817 World Champion 1/8 Nitro Buggy

http://www.neobuggy.net/2017/02/13/h...8-nitro-buggy/



Notes from the D817 designer, Torrance Deguzman:
  • The team drivers gravitated toward the optional long chassis for the D815, which gave the car more stability. The long chassis is now standard on the D817.
  • The chassis outer shape has been revised, it is now symmetrical left-to-right.
  • The steel rear skid plate has been removed for lighter weight.
  • A revised D-Mount works in conjunction with the new chassis, and has added material at the bottom for longer wear.
  • 3.0o toe-in is the standard D-mount in the kit, and optional D-mounts now come in finer 0.25o increments (2.75o, 3.00o, 3.25o, 3.50o).
  • The rear hub geometry has evolved to allow a lower axle height and the camber link location hole pattern to be shifted higher and allows for a longer rear link. The settings that worked on the D815 car can still be replicated but we’ve removed the unused settings and added new ones. This rear hub is the same standard hub that comes on the E817.
  • The D817 is equipped with universal drive shafts for improved bumpy track performance and for ease of maintenance. The CVA shafts from the D815 are still compatible with the D817.
  • New body mounts that are made of tougher material are included. (Same as the E817)
  • Virtually all of the tuning parts available for the D815 are still compatible with the D817.

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