ABS Upgrade

Some goodies from Science of Speed arrived today.

harness too?

slow down! You're beating me. (I've had mine sitting on the shelf for nearly a year now)

I should have never sold it to XRC then my second change was buying back from him But at the same exact time I was gonna buy it back, RYU texts me looking for one and I said hell let RYU buy it back from XRC LOL im a dummy

I kick myself in the azz everyday for this one LOL

I did the ABS upgrade four years ago.... You're gonna LOVE it!

RYU said:

harness too?

slow down! You're beating me. (I've had mine sitting on the shelf for nearly a year now)

Click to expand...

I have the harness from KSP Engineering in Japan. You're going to geek out on this project- full brake overhaul. New master cylinder, totally disassembled and refinished (media blasted, painted and baked) calipers and ABS upgrade. Since I decided to keep my NSX and not buy the new one, I am investing the money in making my car like new. This year is the brake system. Next year will be fuel system (pump, filter and all lines). After that, all rubber suspension bushings replaced hopefully with help from Ti Dave.

Someone needs to come up with a cheaper solution for doing the swap to the newer ABS.
Is there a write up?

I will be doing a full article for the DIY with pics and maybe videos. No cheaper solution- believe me I looked. The NSX ABS has the brake balance and tuning in the digital computer mounted to the modulator. Unless you have a code writer that can crack and re-write the software, using any other ABS modulator will give you incorrect inputs and potentially dangerous/deadly consequences. Also, the SOS kit already is considerably cheaper than buying through the dealer. They found a good source for the units in Japan. Also, I hear the NA2 R ABS is a hot setup. According to Kaz, it is much less intrusive and really lets you go in deep before kicking in- pucker factor of about 9.5

More parts in today from Japan.

I have done the upgrade 2 years ago and love apart from the weight soooo much better on track, what is the KSP harness you are talking about?

scammy said:

I have done the upgrade 2 years ago and love apart from the weight soooo much better on track, what is the KSP harness you are talking about?

Click to expand...

KSP Engineering is a company in Japan that specializes in the NSX and other exotics. They make many aftermarket parts for our car, including this ABS change harness. I chose the KSP harness for two reasons. First and foremost, it uses crimped connectors instead of solder, just like OEM. Because my NSX is my daily car and I drive in winter, durability in all conditions is critical for me, especially for a safety item like ABS. Second, KSP built the harness in two sections, which makes passing it through the firewall much easier.

Hi Honcho,

can you source one for me?? it's the only thing i miss to do the upgrade...
(i had one, but loaned it to a us guy for copy and never heard back....)

Thanks,
Nuno

Nuno I would contact Kaz and buy directly from him. He modifies the KSP harness to include the SCS terminal, which permits quick problem code checking. My KSP does not have this and I am kicking myself, since any time I get an ABS light, I am going to have to chase it down by testing all the leads.

96cxt said:

Someone needs to come up with a cheaper solution for doing the swap to the newer ABS.
Is there a write up?

Click to expand...

There is a write up I did:
http://nsxprime.com/wiki/Upgrade_to_2000-2005_ABS_using_SOS_kit

Others have as well:
http://www.nsxprime.com/forum/showthread.php/181762-SOS-NA2-ABS-Uprade?highlight=ABS

warrenw said:

There is a write up I did:
http://nsxprime.com/wiki/Upgrade_to_2000-2005_ABS_using_SOS_kit

Others have as well:
http://www.nsxprime.com/forum/showthread.php/181762-SOS-NA2-ABS-Uprade?highlight=ABS

Click to expand...

Just printed it up- doing the upgrade this weekend.

Thanks

Part 1 - SOS 2000+ ABS Update with KSP Harness

The following is my process installing the SOS ABS upgrade using the harness from KSP Engineering in Japan. Special thanks to Warren W for his very helpful write-up and Kaz of NSXCB for invaluable assistance with the KSP unit.

Tools I found useful:

10 mm Flare Nut Wrench
Vise-Grips
Lots of shop rags
Work Light
3, 6 and 12 inch 3/8 ratchet extensions
Small and Large Black Zip-Ties
1/2" driver breaker bar

Step 1: Depressurize old ABS system by either using T-handle tool on the bleed screw or manually opening one of the solenoids with your "exercise kit" like I did. USE CAUTION. That brake fluid is pressurized at 5,000 psi. It will foam the reservoir and come out fast. I held a rag over the reservoir to contain any spillage. Drain out the rest of the brake fluid using whatever method you like.

Step 2: Disconnect and drain brake lines at the wheels. Because I was also rebuilding my calipers, I just removed them from the car and allowed the lines to gravity-drain into some used tin cans from my recycle bin. This became a great decision because it really limited the amount of brake fluid spill when tackling the modulator. Space is tight in there and brake fluid eats paint. This step limits that risk.

Step 2a(optional): Remove master cylinder. This really frees up access, but is optional. I also was changing my master cylinder, so it made sense for me.

Looks like we caught it just in time. This master cylinder is 23 years old with 92,XXX miles. The rust is not from the cylinder, but the brake booster. It indicates brake fluid was leaking past the piston seal, ate the paint off of the booster and started to rust it. Yours probably looks the same, or worse.



Step 2: Remove cruise control unit and rest it on the hood garnish.




Step 3: Remove battery, battery box, spare tire/bracket, relay sub harness and heater blower unit (only 4 bolts!)



Step 4: Unplug all electrical connectors from the old ABS unit and disconnect the front and rear brake lines. Undo the three large bolts holding the unit to the NSX chassis and lift the unit out as an assembly. Some jostling/tilting is necessary to clear all of the loose lines and connections. You probably will scratch your paint like I did below. That's ok- your NSX is aluminum and won't rust. Still, I hit that area with the same Krylon flat black paint I used to patch up the brake booster.



More to come...

Did mine in May. http://www.nsxprime.com/forum/showthread.php/181762-SOS-NA2-ABS-Uprade?highlight=mcrider Warren's write-up was a big help. If you drive your car it is a must do upgrade.

Honcho, do you have a more detailed write-up of the KSP harness install? The shop working on my car is having difficulty completing the work. Attached are the 3 they do not know what to do with.

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ABS Definitive List

I've searched all over and was not able to find a definitive parts list for the upgrade. SOS and Marc sell the "kit" but not clear what is in it. Is the below the complete list? Assume I am replacing both front brake lines (they have to come out for paint anyway).


Prop Valve 46210-SL0-003 x1
Pipe S, Brake 46372-SL0-D00 x1
Pipe T, Brake 46373-SL0-D00 x1
Pipe U, Brake 46374-SL0-D00 x1
Pipe V, Brake 46375-SL0-D00 x1
Pipe X, Brake 46377-SL0-D00 x1
Pipe Y, Brake 46378-SL0-D00 x1
Pipe Z, Brake 46379-SL0-D00 x1
Clip, Brake Pipe 46396-SL0-003 x1
Prop Valve Bracket 46215-SL0-000 x1
Clip, Brake Pipe 46395-SM4-951 x1
Clip D 46392-SL0-003 x1
ABS Rubber Mounting 57101-S2A-003 x3
Clip, Brake Pipe 46396-SL0-003 x1
Prop Bracket Bolts 95701-06016-05 x3
Prop Valve Bolt 95701-08040-05 x3
Modulator 57110-SL0-Z03 x1
Modulator Studs 57102-S2A-003 x2
Modulator Bracket 57116-SL0-000 x1
Mod Bracket Bolts 95701-08020-05 x3

VALVE ASSY., PROPORTIONING (46210-SL0-003)
BRACKET, PROPORTIONING VALVE (46215-SL0-000)
PIPE S, BRAKE (46372-SL0-D00)
PIPE T, BRAKE (46373-SL0-D00)
PIPE U, BRAKE (46374-SL0-D00)
PIPE V, BRAKE (46375-SL0-D00)
PIPE W, BRAKE (46376-SL0-D00)
PIPE X, BRAKE (46377-SL0-D00)
PIPE Y, BRAKE (46378-SL0-D00)
PIPE Z, BRAKE (46379-SL0-D00)
2 x GROMMET A, BRAKE PIPE (46380-SH3-000)
CLIP, BRAKE PIPE (46395-SM4-951)
CLIP, BRAKE PIPE (46396-SL0-003)
3 x RUBBER, ABS MOUNTING (57101-S2A-003)
2 x BOLT, ABS MOUNTING (57102-S2A-003)
MODULATOR ASSY. (57110-SL0-Z03 or NSX-R - 57110-SL0-N21)
BRACKET, MODULATOR (57116-SL0-000)
BRACKET, MODULATOR (57115-SL0-003)
3 x BOLT, FLANGE (10X50) (90170-SL0-000)
2 x NUT-WASHER (6MM) (94071-06080)
3 x BOLT, FLANGE (6X16) (95701-06016-05)
3 x BOLT, FLANGE (8X20) (95701-08020-05)
BOLT, FLANGE (8X40) (95701-08040-05)


You can reuse the old BRACKET, MODULATOR (57115-SL0-003) from your old ABS unit