ADVrider

Go Back   ADVrider > Bikes > Old's Cool
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-24-2013, 02:57 AM   #16
ontic
 
Joined: Jul 2008
Location: Melbourne
Oddometer: 1,045


I can't wait to see this thing, that lathe work is wild.

What kind of surface is the main wheel going to have? Thinking about grip and tyre traction...


__________________
1974 R90/6
1981 R80G/S
1994 XLR250R
ontic is offline   Reply With Quote
Old 08-24-2013, 03:23 AM   #17
mousitsas
Beastly Adventurer
 
mousitsas's Avatar
 
Joined: Oct 2008
Location: Athens, Greece
Oddometer: 2,654
Very interesting built. Only 'objection' I might have is that it is inertial so you can't have measurements at constant rpms, but I don't know how important this is.
mousitsas is online now   Reply With Quote
Old 08-24-2013, 05:54 AM   #18
anotherguy
Beastly Adventurer
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 5,936
An inexpensive upgrade for you. Next would be a load controller for steady state EFI mapping.
__________________
A lie has no feet......it can't stand alone.............
Jason Newsted
anotherguy is offline   Reply With Quote
Old 08-24-2013, 05:55 AM   #19
Rob Farmer
Beastly Adventurer
 
Rob Farmer's Avatar
 
Joined: Aug 2002
Location: Loughborough, Leicestershire. England
Oddometer: 5,065
great stuff


Or you could go the Norwegian way

Rob Farmer is offline   Reply With Quote
Old 08-24-2013, 05:58 AM   #20
adrenal OP
www.cafebeemer.com.au
 
adrenal's Avatar
 
Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 444
Quote:
Originally Posted by ontic View Post


I can't wait to see this thing, that lathe work is wild.

What kind of surface is the main wheel going to have? Thinking about grip and tyre traction...

The lump has 4mm machined cross grooves. All will be revealed !
__________________
Adrian
cafebeemer is now:http://www.skrunkwerks.com
farcebook page: http://facebook.com/skrunkwerks
instagram: #skrunkwerks
adrenal is offline   Reply With Quote
Old 08-24-2013, 06:15 AM   #21
adrenal OP
www.cafebeemer.com.au
 
adrenal's Avatar
 
Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 444
Quote:
Originally Posted by mousitsas View Post
Very interesting built. Only 'objection' I might have is that it is inertial so you can't have measurements at constant rpms, but I don't know how important this is.
I chose the inertia style because it is easiest to build. Basically just a mass spun by the back wheel. Same as that crazy Norwegian rig where the truck wheels are the mass. A brake or absorption dyno is what's needed to work out maps for EFI or an ignition curve for a particular cam.
You can do this sort of work after a fashion with inertia dyno but it is not ideal.
__________________
Adrian
cafebeemer is now:http://www.skrunkwerks.com
farcebook page: http://facebook.com/skrunkwerks
instagram: #skrunkwerks

adrenal screwed with this post 08-26-2013 at 04:36 PM
adrenal is offline   Reply With Quote
Old 08-24-2013, 03:35 PM   #22
adrenal OP
www.cafebeemer.com.au
 
adrenal's Avatar
 
Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 444
The shaft







The sword of damocles. By design, almost 0.1mm (4 thou) interference between the shaft and the bore!!
How the F*#k are we going to get this puppy in?
KY just ain't goin to cut it.

__________________
Adrian
cafebeemer is now:http://www.skrunkwerks.com
farcebook page: http://facebook.com/skrunkwerks
instagram: #skrunkwerks

adrenal screwed with this post 08-24-2013 at 04:19 PM
adrenal is offline   Reply With Quote
Old 08-24-2013, 06:27 PM   #23
_cy_
Beastly Adventurer
 
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 5,347
liquid nitrogen on center shaft .. heat up lump o steel ..
yeooooowwww .. what a press fit!

construct an I-beam structure to support a 20ton hydraulic jack.
assuming you don't have a big honking press ...

_cy_ screwed with this post 08-24-2013 at 06:35 PM
_cy_ is online now   Reply With Quote
Old 08-24-2013, 07:38 PM   #24
adrenal OP
www.cafebeemer.com.au
 
adrenal's Avatar
 
Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 444
Quote:
Originally Posted by _cy_ View Post
liquid nitrogen on center shaft .. heat up lump o steel ..
yeooooowwww .. what a press fit!

construct an I-beam structure to support a 20ton hydraulic jack.
assuming you don't have a big honking press ...
Got it in one Maestro, but no press
I'll post some pics soon.
__________________
Adrian
cafebeemer is now:http://www.skrunkwerks.com
farcebook page: http://facebook.com/skrunkwerks
instagram: #skrunkwerks
adrenal is offline   Reply With Quote
Old 08-25-2013, 04:14 AM   #25
adrenal OP
www.cafebeemer.com.au
 
adrenal's Avatar
 
Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 444
crunch time

While the shaft set the liquid nitrogen furiously boiling, I got to work heating the lump. After 20 minutes, the boiling stopped, signalling that both liquid and metal were at the same temperature: -196C or -385F.

Still lots of heating to do - over an hour.







Tense moment: if we didn't get things right the shaft could seize part way down.








The money shot!

__________________
Adrian
cafebeemer is now:http://www.skrunkwerks.com
farcebook page: http://facebook.com/skrunkwerks
instagram: #skrunkwerks

adrenal screwed with this post 08-25-2013 at 04:25 AM
adrenal is offline   Reply With Quote
Old 08-25-2013, 06:12 AM   #26
anotherguy
Beastly Adventurer
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 5,936
Nice to see someone do what's needed the simple way. Good on ya.
__________________
A lie has no feet......it can't stand alone.............
Jason Newsted
anotherguy is offline   Reply With Quote
Old 08-25-2013, 06:39 AM   #27
_cy_
Beastly Adventurer
 
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 5,347
Quote:
Originally Posted by adrenal View Post
While the shaft set the liquid nitrogen furiously boiling, I got to work heating the lump. After 20 minutes, the boiling stopped, signalling that both liquid and metal were at the same temperature: -196C or -385F.

Still lots of heating to do - over an hour.




Tense moment: if we didn't get things right the shaft could seize part way down.




The money shot!

WOW ... Good Job!!!!!!!

shaft is probably stronger from the cryogenic treatment....
_cy_ is online now   Reply With Quote
Old 08-25-2013, 06:05 PM   #28
adrenal OP
www.cafebeemer.com.au
 
adrenal's Avatar
 
Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 444
Thanks CY. It was ubernerd fun
__________________
Adrian
cafebeemer is now:http://www.skrunkwerks.com
farcebook page: http://facebook.com/skrunkwerks
instagram: #skrunkwerks
adrenal is offline   Reply With Quote
Old 08-27-2013, 08:36 AM   #29
drhach
gorillamanufacturing.com
 
drhach's Avatar
 
Joined: Nov 2006
Location: Waukegan
Oddometer: 2,185
Is this really cheaper/easier than building a brake dyno?
__________________
1976 R90/6
1972 XLCH
2010 Triumph Thunderbird SE
drhach is online now   Reply With Quote
Old 08-27-2013, 08:51 AM   #30
dom1104
Gnarly Adventurer
 
dom1104's Avatar
 
Joined: Jan 2009
Location: Indianapolis Indiana
Oddometer: 316
This is awesome. I love this.
dom1104 is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 10:09 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014