Acura Integra Type-R All Integra Type R Discussions

22mm USDM VS. 23mm JDM, does it make a "BIG" different?

Thread Tools
 
Search this Thread
 
Old Feb 12, 2003 | 08:41 AM
  #1  
DB8's Avatar
DB8
Thread Starter
Honda-Tech Member
iTrader: (8)
 
Joined: Aug 2000
Posts: 403
Likes: 0
From: Toronto / Hong Kong
Default 22mm USDM VS. 23mm JDM, does it make a "BIG" different?

just wondering if anyone have experience with the 2 pieces, and how does it make a different.............

Thanks in advance
Reply
Old Feb 12, 2003 | 08:43 AM
  #2  
Doctor CorteZ's Avatar
Honda-Tech Member
 
Joined: Nov 2001
Posts: 6,400
Likes: 0
From: ...
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (DB8)

just wondering if anyone have experience with the 2 pieces, and how does it make a different.............
yes.
several people on the board have stepped up to the 23 and seem to like it quite a bit.
Reply
Old Feb 12, 2003 | 08:47 AM
  #3  
d8168055's Avatar
Honda-Tech Member
 
Joined: Sep 2001
Posts: 1,711
Likes: 0
From: Heaven Scent
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (Doctor CorteZ)

119%... do a search...
Reply
Old Feb 12, 2003 | 09:03 AM
  #4  
EleanoR's Avatar
Member
 
Joined: Jun 2001
Posts: 3,650
Likes: 1
From: Orlando, FL
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (d8168055)

https://honda-tech.com/zerothread?id=100159
Reply
Old Feb 12, 2003 | 12:54 PM
  #5  
Cosworth's Avatar
Honda-Tech Member
 
Joined: May 2001
Posts: 6,402
Likes: 0
From: Fairbanks
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (DB8)

just wondering if anyone have experience with the 2 pieces, and how does it make a different.............

Thanks in advance
Yes. Big difference? No. Noticeable difference? Yes.
Reply
Old Feb 12, 2003 | 01:25 PM
  #6  
Chris N's Avatar
Honda-Tech Member
 
Joined: Jul 2002
Posts: 14,274
Likes: 0
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (d8168055)

119%... do a search...
This is incorrect. It is stronger/less resistant to flex by a FACTOR of 1.19, which means it is 19% stronger.

Quote from an archived thread:

There are two primary factors that determine an anti-roll bar's torsional stiffness: the diameter of the bar and the length of the bar's moment arm. Diameter is generally the easiest concept to grasp, as it is somewhat intuitive that a larger diameter bar would have greater torsional rigidity.
Torsional (or twisting) motion of the bar is actually governed by the equation: twist = (2 x torque x length)/(p x diam4 x material modulus.) And since the diameter is in the denominator, as diameter gets larger, the amount of twist gets smaller. Which, in a nutshell, means that torsional rigidity is a function of the diameter to the fourth power. This is why a very small increase in diameter makes a large increase in torsional rigidity.

For example, to compare the rigidity of a 22mm to a 23mm one, simply use the equation 23^4/22^4. Some quick math yields the figure of 1.19. In other words, a 23mm bar is 1.19 times as stiff-or 19 percent stiffer-than a 22mm bar of the same design.

This information can be found at http://www.grassrootsmotorsports.com/swaybars.html
Using the info above -
23mm is 19% stronger than 22mm
26mm is 95.1% stronger than 22mm
26mm is 63.3% stronger than 23mm


[Modified by Chris N, 4:26 PM 2/12/2003]
Reply
Old Feb 12, 2003 | 03:05 PM
  #7  
chameleon's Avatar
Honda-Tech Member
 
Joined: May 2000
Posts: 4,639
Likes: 2
From: ..new york..
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (Chris N)

i have the 26mm front and 23mm rear on my EG their both jdm and i havent really tested them to the potential, since i upgrade few days ago from nothing but just first drive was definitely
Reply
Old Feb 12, 2003 | 03:12 PM
  #8  
Reid's Avatar
Global Moderator
 
Joined: Jan 2000
Posts: 11,470
Likes: 0
From: Yokohama, Japan
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (chameleon)

i have the 26mm front and 23mm rear on my EG their both jdm and i havent really tested them to the potential, since i upgrade few days ago from nothing but just first drive was definitely
You won't be able to tell a difference in street driving.
Reply
Old Feb 12, 2003 | 03:48 PM
  #9  
DutchITR1689's Avatar
Honda-Tech Member
 
Joined: Mar 2001
Posts: 3,468
Likes: 0
From: Weed Country, Holland, Netherlands
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (Chris N)

119%... do a search...

This is incorrect. It is stronger/less resistant to flex by a FACTOR of 1.19, which means it is 19% stronger.
Oh well, maybe he meant by a factor of 119%.....
Reply
Old Feb 12, 2003 | 06:16 PM
  #10  
BABY NSX's Avatar
Honda-Tech Member
 
Joined: Jun 2000
Posts: 1,637
Likes: 0
From: Crazy Canuck, Everywhere
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (DutchITR1689)

For the money it is hard to beet the 23mm bar if your setup warrants it.

If you are running with the stock 22mm bar and suffer from mild under-steer in conditions where some over-steer would be preferred then the 23mm bar will definitely help. If you suffer from massive under-steer then you will need to approach the solution differently. The difference between the two bars is subtle but very noticeable if your driving the car at its limits.

Having felt the difference between the two bars on the same car I can say that the 23mm bar is near perfect for my setup. Going to 26mm without other changes would be going to far. The 24mm might work well but for the price... I'll just add 1-2psi in the rear and get some free rotation.
Reply
Old Feb 12, 2003 | 10:44 PM
  #11  
OutLaw MR's Avatar
Honda-Tech Member
 
Joined: Apr 2001
Posts: 552
Likes: 0
From: OC, Cali, USA
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (BABY NSX)

so for subtle corner exit understeer which I try to correct with throttle (caution)
the the rear bar would help how is that please enlighten me I was begining to think I needed a front bar ohh and is the front one same as JDM one?
btw where can I get them?thanks!
Reply
Old Feb 12, 2003 | 11:12 PM
  #12  
PyR01-0347's Avatar
 
Joined: Mar 2002
Posts: 281
Likes: 0
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (DB8)

Yeah I felt a differance when I upgraded to the 23mm swaybar. It was not a dramatic differance in handling but you could feel that the rear of the car wanting to come around alittle more when you corner hard. Actually I think they should have put them on the USDM Type Rs as standard equipment.
Reply
Old Feb 13, 2003 | 02:06 AM
  #13  
tC_Dragon's Avatar
Member
 
Joined: Apr 2002
Posts: 3,416
Likes: 0
From: Formerly pdcdragon, CA, US
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (PyR01-0347)

the jdm front bar is a bit larger too as well isnt it? if it is different from the usdm, it may be well worth it to balance the car out more by switchin to that... that way you would stay grounded without as much tendency to swing out.
Reply
Old Feb 13, 2003 | 03:26 AM
  #14  
BudMan's Avatar
Honda-Tech Member
 
Joined: Oct 2000
Posts: 2,337
Likes: 0
From: Jasmaville, KS
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (pdcdragon)

the jdm front bar is a bit larger too as well isnt it? if it is different from the usdm, it may be well worth it to balance the car out more by switchin to that... that way you would stay grounded without as much tendency to swing out.
I would think very few people would want to increase their front bar to LOWER their rotation. If that were the goal, then going back to the original USDM bar would be a cheaper solution.

**Note: YES, you can actually feel the difference between the rear 22/23mm bar, even on the street if you have a few nice undeveloped and newly paved business districts near your home For me, it made about the same difference in feel as adding the JDM rear strut bar (borrowed one for the expo last year) when I had fully stock suspension.

That reminds me - anybody have a JDM rear strut bar they need to get rid of??? email me with a price at jeff@itrca.com if you do.
Reply
Old Feb 13, 2003 | 05:35 AM
  #15  
BABY NSX's Avatar
Honda-Tech Member
 
Joined: Jun 2000
Posts: 1,637
Likes: 0
From: Crazy Canuck, Everywhere
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (OutLaw R)

so for subtle corner exit understeer which I try to correct with throttle (caution)
the the rear bar would help how is that please enlighten me I was begining to think I needed a front bar ohh and is the front one same as JDM one?
btw where can I get them?thanks!
Corner exit under-steer in a FWD car can always be induced by excess throttle. With the 23mm bar you are starting with a little more over-steer at balanced throttle. This results in a more balanced car on corner exit. Of course corner entry is also improved as the car will rotate into the corner with much more ease.

The overall effect is increased corner speed because you are not fighting with under-steer throughout the corner.

Hope that made sense...
Reply
Old Feb 13, 2003 | 06:45 AM
  #16  
DarthLuder's Avatar
New User
 
Joined: Aug 2001
Posts: 1,336
Likes: 0
From: chicago, il, USA
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (DB8)

No
Reply
Old Feb 13, 2003 | 06:55 AM
  #17  
sil's Avatar
sil
Junior Member
 
Joined: Dec 2001
Posts: 761
Likes: 0
From: Toronto, ON, CANADA
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (Chris N)

Using the info above -
23mm is 19% stronger than 22mm
26mm is 95.1% stronger than 22mm
26mm is 63.3% stronger than 23mm
[Modified by Chris N, 4:26 PM 2/12/2003]
so that would mean for us little civic people upgrading to the itr 22mm bar from 13mm would be a 720% stronger bar
Reply
Old Feb 13, 2003 | 07:02 AM
  #18  
BABY NSX's Avatar
Honda-Tech Member
 
Joined: Jun 2000
Posts: 1,637
Likes: 0
From: Crazy Canuck, Everywhere
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (ITR GURU)

No
No what?
Reply
Old Feb 13, 2003 | 07:06 AM
  #19  
Chris N's Avatar
Honda-Tech Member
 
Joined: Jul 2002
Posts: 14,274
Likes: 0
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (sil)

Using the info above -
23mm is 19% stronger than 22mm
26mm is 95.1% stronger than 22mm
26mm is 63.3% stronger than 23mm
[Modified by Chris N, 4:26 PM 2/12/2003]
so that would mean for us little civic people upgrading to the itr 22mm bar from 13mm would be a 720% stronger bar
Which is probably why you need the bsq/beaks reinforcement kit!

VX hatch with 22mm itr rear sway and no front sway - interesting ride.
Reply
Old Feb 13, 2003 | 07:09 AM
  #20  
ajchen's Avatar
Member
 
Joined: Sep 2001
Posts: 1,650
Likes: 0
From: Chicago, USA
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (Chris N)

that would be splitime's hatch right?

that must be a little scary...


Which is probably why you need the bsq/beaks reinforcement kit!

VX hatch with 22mm itr rear sway and no front sway - interesting ride.
Reply
Old Feb 13, 2003 | 07:11 AM
  #21  
Chris N's Avatar
Honda-Tech Member
 
Joined: Jul 2002
Posts: 14,274
Likes: 0
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (ajchen)

that would be splitime's hatch right?

that must be a little scary...
It's Dave's, yep. It's not scary... its fun.
I have a feeling the car will be much more balanced when all the suspension sitting in my garage goes on the car.
Reply
Old Feb 13, 2003 | 07:37 AM
  #22  
ajchen's Avatar
Member
 
Joined: Sep 2001
Posts: 1,650
Likes: 0
From: Chicago, USA
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (Chris N)

that car needs balance... the drop might help a bit, but a front sway bar would be optimal.


It's Dave's, yep. It's not scary... its fun.
I have a feeling the car will be much more balanced when all the suspension sitting in my garage goes on the car.
Reply
Old Feb 13, 2003 | 08:19 AM
  #23  
BABY NSX's Avatar
Honda-Tech Member
 
Joined: Jun 2000
Posts: 1,637
Likes: 0
From: Crazy Canuck, Everywhere
Default Re: 22mm USDM VS. 23mm JDM, does it make a "BIG" different? (ajchen)

Got an IM about my setup so I figured I would post my response here for interests sake.

My current setup includes Zeal 2B coilovers with the stiffer of the two sets of springs available (12kg/mm - 8kg/mm if I remember correctly), Skunk2 front camber kit, rear camber kit, and the 23mm RSB.

Currently I run on Kumho 205x50x15s on the stock wheels set at equal tire pressure front and rear ~38-40psi hot. My alignment settings are ~2.5deg camber in front ~1.5deg in the rear with 1/8th toe out front and back. Typically I set the shocks to 5-5 or 6-6. Before the 23mm bar went in I needed to offset the shocks to 5F-6R for a similar (yet compromised) effect.

The 23mm bar was a big help in getting the car to rotate into corners. Vehicle slip angle is then adjusted through the corner with throttle modulation. Corner exit is a very smooth transition from over-steer to under-steer as I squeeze the gas.

These corner dynamics apply to most slow to med-high speed corners that don’t have any elevation or camber changes.

Hope I didn’t give to much away (expo coming up and all)
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Rikaro
Acura Integra Type-R
3
Apr 18, 2007 08:42 AM
ImXposed
Acura Integra
5
Feb 19, 2007 07:36 PM
ekVtecPower
Honda Civic / Del Sol (1992 - 2000)
13
Mar 15, 2006 07:22 PM
01CWITR
Acura Integra Type-R
11
May 24, 2002 10:25 AM
hybrider
Acura Integra Type-R
2
May 14, 2002 11:50 PM




All times are GMT -8. The time now is 08:52 PM.