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  Topic: Interpreting Dyno Graphs with lots of hysterisis
Wiisass

Replies: 1
Views: 5260

PostForum: Good Vibrations   Posted: Tue Jul 29, 2008 11:21 pm   Subject: Interpreting Dyno Graphs with lots of hysterisis
Wow, I need to check this place more often. I have been changing stuff around a lot and have not remembered to check in here in a while, so I'm sorry for the late response.

If the shock has a lo ...
  Topic: Syn's Cage, Drift411
Wiisass

Replies: 0
Views: 9663

PostForum: Builds   Posted: Mon Jan 21, 2008 2:41 pm   Subject: Syn's Cage, Drift411
http://www.theoryinpracticeengineering.com/gallery/d/3789-3/DSC01316.JPG

http://www.theoryinpracticeengineering.com/gallery/d/3798-3/DSC01319.JPG

http://www.theoryinpracticeengineering.com/galle ...
  Topic: Brian's supra
Wiisass

Replies: 4
Views: 6276

PostForum: Builds   Posted: Sat Dec 15, 2007 12:16 pm   Subject: Brian's supra
Brian, I think that was my brother's post on SF when he thought the spacers might have had something to do with the power steering problem. But I double checked the car, the rack is still good, we we ...
  Topic: Suspension modeling question
Wiisass

Replies: 6
Views: 8811

PostForum: Good Vibrations   Posted: Tue Dec 04, 2007 2:01 am   Subject: Suspension modeling question
You're vibrations equations are correct, but they won't give you what you think they are. Also, depending on how you look at it, you will only be getting one side of the damper curve. You really nee ...
  Topic: New here. MK3 owner from MD
Wiisass

Replies: 2
Views: 13128

PostForum: Drunken Ramblings   Posted: Tue Dec 04, 2007 1:46 am   Subject: New here. MK3 owner from MD
Nice to see you on here. I recognize the name from supramania. I didn't realize you knew Kiely and those guys. You should definitely come up to a Clubloose event with them sometime next year. Ther ...
  Topic: Suspension modeling question
Wiisass

Replies: 6
Views: 8811

PostForum: Good Vibrations   Posted: Sat Nov 24, 2007 12:18 pm   Subject: Suspension modeling question
That model won't get you very far. You only have part of half of the system, you need the tire in there and the unsprung mass to come up with more of it. Modeling the gas pressure at this point for ...
  Topic: Suspension modeling question
Wiisass

Replies: 6
Views: 8811

PostForum: Good Vibrations   Posted: Thu Nov 22, 2007 3:42 pm   Subject: Suspension modeling question
What equations are you using and is it a 2 degree of freedom system? If it's not, it won't be very accurate at all considering that the rebound (extension) side is going to have different values than ...
  Topic: Worth a read for newbs....
Wiisass

Replies: 2
Views: 5473

PostForum: Good Vibrations   Posted: Sat Oct 13, 2007 12:29 am   Subject: Worth a read for newbs....
That's some of the stuff that Dennis Grant had written. He seems like a knowledgeable guy and has a lot of experience messing with dampers. I had talked to him a little about some stuff on another b ...
  Topic: Bilstein vs Koni vs ???
Wiisass

Replies: 20
Views: 29195

PostForum: Good Vibrations   Posted: Sat Oct 13, 2007 12:23 am   Subject: Bilstein vs Koni vs ???
Jon, I will try and get to the numbers this weekend, I have just been real busy with a lot of other stuff here and haven't had time to get to it. But I will figure out what you can get away with and ...
  Topic: Dyno charts, what do you think?
Wiisass

Replies: 6
Views: 7649

PostForum: Good Vibrations   Posted: Sat Oct 13, 2007 12:20 am   Subject: Dyno charts, what do you think?
Dennis, I probably should be used to kilogram force units by now after seeing them so much. It was just drilled into my head during my Vibrations class at school that kilograms have no part in spring ...
  Topic: 2JZA80 Suspension
Wiisass

Replies: 5
Views: 7199

PostForum: Good Vibrations   Posted: Sat Oct 13, 2007 12:01 am   Subject: 2JZA80 Suspension
Well I spent some time on Tuesday testing an mkiv supra at Pocono. This car was running Tein HA's with stock sway bars and the expected performance was very close to the preliminary calculations. So ...
  Topic: S13 spindle tie rod mount relocation.
Wiisass

Replies: 13
Views: 14361

PostForum: Good Vibrations   Posted: Fri Sep 21, 2007 12:34 am   Subject: S13 spindle tie rod mount relocation.
The inside wheel does become less important, but it depends on how the car is setup to know how less important it becomes. Two evenly loaded tires will produce more lateral force than one fully loade ...
  Topic: Bilstein vs Koni vs ???
Wiisass

Replies: 20
Views: 29195

PostForum: Good Vibrations   Posted: Thu Sep 20, 2007 12:55 am   Subject: Bilstein vs Koni vs ???
Dennis,

Post up everything you have. If you need space to host pictures or files, I can arrange that. For pictures, you should be able to just go to the gallery on here and create an account and ...
  Topic: S13 spindle tie rod mount relocation.
Wiisass

Replies: 13
Views: 14361

PostForum: Good Vibrations   Posted: Thu Sep 20, 2007 12:49 am   Subject: S13 spindle tie rod mount relocation.
It may not be the true Ackerman percentage, but it tells you more and is a lot more useful.

Ackerman is more important for steady state. You get the main benefit of ackerman steering when slip a ...
  Topic: S13 spindle tie rod mount relocation.
Wiisass

Replies: 13
Views: 14361

PostForum: Good Vibrations   Posted: Wed Sep 19, 2007 12:20 am   Subject: S13 spindle tie rod mount relocation.
Well I think your analogy is a little off. I'm not calling different parts of the car different names. I'm not calling the steering system, the braking system. So I'm still going to use my numbers ...
  Topic: Fun with Bilsteins
Wiisass

Replies: 4
Views: 11734

PostForum: Good Vibrations   Posted: Wed Sep 19, 2007 12:03 am   Subject: Fun with Bilsteins
Dennis, it's all just sitting on there. The rubber bumper was a little hard to move at first but it was just sticking to the shaft. So at full extension, loads can be transferred to the piston rod. ...
  Topic: S13 spindle tie rod mount relocation.
Wiisass

Replies: 13
Views: 14361

PostForum: Good Vibrations   Posted: Mon Sep 17, 2007 7:15 pm   Subject: S13 spindle tie rod mount relocation.
Like I said when I mentioned that part, it may not agree with the way most people describe ackerman. So it's just my terminology that doesn't match others, not my understanding. And the numbers don' ...
  Topic: AE86 suspension
Wiisass

Replies: 3
Views: 6551

PostForum: Good Vibrations   Posted: Fri Sep 14, 2007 11:01 pm   Subject: AE86 suspension
I haven't forgot about the corolla, it's still on the list of cars to do, there's just a couple other ones in front that I have already started working on.

The hard thing about the corolla is the ...
  Topic: 2JZA80 Suspension
Wiisass

Replies: 5
Views: 7199

PostForum: Good Vibrations   Posted: Fri Sep 14, 2007 10:47 pm   Subject: 2JZA80 Suspension
Aren't the NA sway bars and TT sway bars the same? I always thought they were. I haven't had a chance to measure the sway bar rates for the supra, but I did have some numbers but they didn't seem to ...
  Topic: S13 spindle tie rod mount relocation.
Wiisass

Replies: 13
Views: 14361

PostForum: Good Vibrations   Posted: Fri Sep 14, 2007 10:37 pm   Subject: S13 spindle tie rod mount relocation.
Well my first look at that piece, all I could think was loading nightmare. tie rod loads aren't going to be too high, but it's still an ugly design in that respect. There's like 8 different possible ...
  Topic: Chi's Cage, S13 Vert
Wiisass

Replies: 0
Views: 6831

PostForum: Builds   Posted: Tue Aug 21, 2007 11:33 pm   Subject: Chi's Cage, S13 Vert
I've been working on a cage for friend's car for his S13 vert. Nothing too crazy, just a basic 6-point. Modified the seat rails for the seats to sit lower. I need to raise up the passenger seat a l ...
  Topic: Bilstein vs Koni vs ???
Wiisass

Replies: 20
Views: 29195

PostForum: Good Vibrations   Posted: Tue Aug 21, 2007 11:32 pm   Subject: Bilstein vs Koni vs ???
Jon, the numbers look good, I just haven't had a chance to run them yet. There's been a million things going on. But I haven't forgotten about them, hopefully by the end of the week I will have some ...
  Topic: Bilstein vs Koni vs ???
Wiisass

Replies: 20
Views: 29195

PostForum: Good Vibrations   Posted: Tue Aug 14, 2007 3:38 pm   Subject: Bilstein vs Koni vs ???
Jon, that sounds like it could work for the sway bars. The way I measure them is similar. I have a two mounts that I clamp to the work bench and mount the bar on. Then I fix one end of the bar and ...
  Topic: Fun with Bilsteins
Wiisass

Replies: 4
Views: 11734

PostForum: Good Vibrations   Posted: Fri Aug 10, 2007 4:38 pm   Subject: Fun with Bilsteins
I've been trying to figure out the best way to have a good damper setup for my s13. And before anyone says, just buy some off the shelf coilover, everyone is happy with them, remember who you're talk ...
  Topic: Bilstein vs Koni vs ???
Wiisass

Replies: 20
Views: 29195

PostForum: Good Vibrations   Posted: Fri Aug 10, 2007 4:38 pm   Subject: Bilstein vs Koni vs ???
Jon, welcome to the forum.

With just a quick run of the numbers the spring rates at least look good based on natural frequencies. I don't know about roll rates or anything because I don't have e ...
 
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