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NSX-R Chassis Bar Updates

Joined
19 January 2001
Messages
8,242
Location
Chandler, AZ
Just a quick note to let you know that we have the NSX-R chassis bars back in stock. These are one of the most cost effective and dramatic improvements that can be made for handling performance under aggressive or track driving.

There are several new photos posted online. We also have an installation manual with photos included with the kits now detailing installation of the bars.

http://www.ScienceofSpeed.com/produ...roducts/NSX/Honda/NSX-R_chassis_reinforcement

lowerside.jpg


Cheers,
-- Chris
 
Chris -

I mistakenly deleted the pm that you and I traded a while back about these bars, so sorry for the repeat questions.

I've got a 1998 NSX-T and I'm looking to improve the rigidity of the chassis. Your post above states that these bars make a world of difference in aggressive street and/or track driving. Will they make a noticable difference in everyday street driving?

I know you're familiar with the S2K so I'm kind of comparing this to the old DiGrappa (and others) X style chassis brace that is commonly sold for the little roadster. I put that on my last S2000 and was amazed at the difference.

Can I expect any similarity?
 
Can I expect any similarity?

Yes :wink:

Christian, given that you drive a 98-T, you will notice a significant difference in the steering especially around 60-80 mph, as well as an overall solid feel to the car. All things being equal, you will notice some understeer if you push the car which can be adjusted with sway bars; others have noticed some rattle too but I haven't in any significant way.

But, unless you buy Al Terpak's kit, the brace under the sway bar will not fit the 97+ models especially if you have aftermarket sway bars - tust me on this. HTH.
 
should it pose a problem for a 93 with dali sways ?

also chris. Whats the price for both the bars with charges.
 
You will need my Type R adjustment kits for any year NSX especially if you have an aftermarket sway bar. I have two kits available. One for 91-95 ($40) and another kit for 96-2005 at $70. These kits allow for proper sway bar clearance from the lower Type R brace. Without this kit the sway bar will hit the lower brace and make the front end unusually stiff and it could lead to an eventual failure of either the sway bar or type R brace. The only way around this is to order the type R sway bars themselves which are not too cheap if I remember.
 
the early model kits are needed only if the car is also lowered...

for the early model cars all you need is a few spacers (space out the sway bar mounting points and also to lower the battery tray) and 120mm, 1.25 pitch, M12 bolts.

I have some extra bolts of anyone wants a few of them.

x
 
I have them on my 98 NSX-T and they definitely make for a more solid feel in the steering. Interesting in that it feels heavier but more responsive. No problems with Eibach springs and stock sway bars.

Tim
 
Hmmm ,I have no percievable interference on my 96 with the R bar,comptech sway,and I have the R susp.We have cut away the ends of the battery tray,that did interfere with the sway.
 
John, just curious; does your Type R brace clear - as in it does not touch/rub/rest on - the Comptech sway bar and or the battery tray's two arms? Have you actually tried to see/measure the spacing when the car's suspension is loaded? Simple test would be to see if you can pass a few sheets of paper through spacings. And didn't the battery tray change in 97+ years or did it start in 96 - I am confused as to why you would trim it? I know yours is a 96, but check the pics in posts 87 and 88.

http://www.nsxprime.com/forums/showthread.php?t=24233&page=2&pp=50

Perhaps you have no issues because the Type R suspension lowers the car by only 0.5" at best? Last weekend I helped Chien from the Bay area install the lower Type R bar on his pristine 91 (16K miles if you can believe it) with Comptech sway bars and I believe OEM springs. Unlike the picture in the first post above, the Type R bar was literally sitting on the battery tray arms after lowering the battery tray. But it cleared the sway bar by about 0.75" ..... so just lowering the car may not be the issue. I think the best option would be to have Al's kit included in all such purchases to give flexibility to the end user since the fit seems to vary from car to car. HTH. YMMV.
 
Next chance I get I will look at these areas on the ground,not on a lift.
 
To be honest, I think the type-R braces should be sold with the spacers(mentioned above) or at least have some warning about the fitment issues. They are not direct bolt on.

1. Front brace is not a bolt on unless you remove the tow hooks completely.
2. The lower bar does not clear many aftermarket sway-bar/lowering combo without spacers.
 
Akio --

Good suggestions.

We have figured out a way to install the NSX-R bars and retain both toe hooks. I could e-mail you the installation manual if you would like to see. Please e-mail us.

We have successfully installed the R bars with aftermarket sway bars (SOS/Comptech). We're looking into spacers for other aftermarket sway bars as well & will note this on the website.

Cheers,
-- Chris


ak said:
To be honest, I think the type-R braces should be sold with the spacers(mentioned above) or at least have some warning about the fitment issues. They are not direct bolt on.

1. Front brace is not a bolt on unless you remove the tow hooks completely.
2. The lower bar does not clear many aftermarket sway-bar/lowering combo without spacers.
 
Chris@SoS said:
Akio --

Good suggestions.

We have figured out a way to install the NSX-R bars and retain both toe hooks. I could e-mail you the installation manual if you would like to see. Please e-mail us.

We have successfully installed the R bars with aftermarket sway bars (SOS/Comptech). We're looking into spacers for other aftermarket sway bars as well & will note this on the website.

Cheers,
-- Chris

Thanks for taking this into consideration Chris! As for the front bar I got it installed myself... Let's just say the bar and my dremel tool did not get a long and there were sparks flying everywhere... :p
 
Ah, thank God for the Dremel. Where would we be without it? :biggrin: I delayed buying this for years and once I got it, I can't believe how much I've used it for tons of things.
 
ATERPAK said:
You will need my Type R adjustment kits for any year NSX especially if you have an aftermarket sway bar. I have two kits available. One for 91-95 ($40) and another kit for 96-2005 at $70. These kits allow for proper sway bar clearance from the lower Type R brace. Without this kit the sway bar will hit the lower brace and make the front end unusually stiff and it could lead to an eventual failure of either the sway bar or type R brace. The only way around this is to order the type R sway bars themselves which are not too cheap if I remember.

The bolded statement above is not true in my experience (1994). My type R bar has never banged or rubbed in any of the following configurations:

a) completely stock suspension + NSX R bars + 15" spare
b) stock shocks & springs + NSX-R bars + CT sways + 15" spare
c) stock shocks & springs + NSX-R bars + CT sways + 16" spare (w/15" bracket)
d) Zanardi springs + konis + NSX-R bars + CT sways + 16" spare (w/15" bracket)

I think if I lowered the car a lot more, I might need your kit. As it sits, everything works peachy together.
 
Mark, it's refreshing to see your post again. Now that we have gone through this process several times, and after I read your how to do posts again, it seems to me that when you bolted/secured the battery tray (missing that last picture in your post #8) the Type R brace would be sitting on the battery arms as there is appears to be no space left. Have you checked that with the car loaded - same thing I asked docjohn above?
 
Hey, good idea. We remove part of the top plate's sheet metal to take care of the gap (which is how the NSX-R toe hooks are designed). However, that's also another good idea on how to take care of this!

Cheers,
-- Chris

White94 said:
 
Hrant said:
John, just curious; does your Type R brace clear - as in it does not touch/rub/rest on - the Comptech sway bar and or the battery tray's two arms? Have you actually tried to see/measure the spacing when the car's suspension is loaded? Simple test would be to see if you can pass a few sheets of paper through spacings. And didn't the battery tray change in 97+ years or did it start in 96 - I am confused as to why you would trim it? I know yours is a 96, but check the pics in posts 87 and 88.

Hrant,I just got to check for interference with susp loaded,,,and lo and behold the sway does rest on the r bar :frown: I have been tracking this way for over 2 yrs :redface: Any way I figure what this is doing is increaseing the sway bars stiffness to near rigid,thus perhaps creating some understeer,which I know I have.Is the short fix to put some washers on the bar mounts to get it to clear?
 
docjohn said:
Hrant,I just got to check for interference with susp loaded,,,and lo and behold the sway does rest on the r bar :frown: I have been tracking this way for over 2 yrs :redface:

Is this my cue to tell you I told you so ...... :biggrin: many are in the same boat as you were, they just assume until they take a looksie :wink:

Any way I figure what this is doing is increaseing the sway bars stiffness to near rigid,

Absolutely. I felt the same and of course some squeaks too. It was as if the sway bar and the Tye R were welded.

thus perhaps creating some understeer,which I know I have.

Yep, that was one of my posts regarding how the Type R was causing understeer especially at Laguna (thus whether some tracks were more conducive to cause understeer or over steer post ....) so to compensate for the understeer - even now that it has cleared, I stiffened the rear sway bar to stiffest.

Is the short fix to put some washers on the bar mounts to get it to clear?


This will work only to a certain degree because you will run out of the bolt's biting threads if you keep adding washers. That is why Al's kit includes a pair of spacers for the Type R mount, a pair of spacers fot the battery mount as you may need to lower that when you lower the Type R, new longer bolts for the Type R and the battery, as well as few washers. HTH.

Edit: typos!
 
Last edited:
Also Hrant really didn't need to trim his battery tray in the long run. We thought there would be interference but later found out that that wasn't necessarily the case. As Hrant has mentioned, there will be a need for longer bolts on the Type R bar (provided in the kit) and also a reduction in the stock sway bar spacer (also in kit). Everything in the kit should provide you with the necessary clearance for the sway bar from the Type R bar, the lower radiator hose, and also allow use to use the stock safety spare tire.

Originally I also drove around with the Type R bar with the Dali sway bar. I had never really thought it was rubbing until I checked it after developing the kit for the later model cars. That's why I modified my original kit for the early model years as well. It has fewer parts but still needs new bolts and spacers in numerous places. Let me know how I can help. :biggrin:
 
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