Going to be picking up a complete EM1 Si brake swap for my EK hatch. Wondering what all else I might need to complete it, more importantly I'm going to replace the whole system so new booster, master cylinder and proportion valve. But my question is since I'm using the whole Si brake conversion, can I just use a booster, MC and proportion valve that is used on the Si for my EK? Only thing I'm worried about is my car isn't ABS and the Si brakes are.

 

No em1 brakes are NOT ABS ... I dont suggest you use your stock prop valves because its set up for rear drums. So Yes its a good idea to change to the Si prop valve mc and booster.

 

Doesn't the EXs in 96-00 and the 99-00 Si's have ABS?

Thanks for the help, I figured it would be best to use the correlating components.

 

I have a 98 EX, no ABS. That was optional in the US. Not sure about the Si though.

 

Canadian sir/si had abs i believe

You have a hatch im assuming; Dx? Cx? So it came with 9.25 fronts
And youre going to add 9.25 rear discs right? So the 40/40 prop the dx comes with is PERFECT for you.
Em1's have front biased brakes because they have 10.25 fronts. Unless you have si/ex fronts dont change your prop.
Brake booster, ehhh.... You can but most certainly dont have to

 

'96 - '00 CX, DX hatchbacks and Si, DX, HX coupes all share the same proportioning valve, Honda part number 46210-S04-902. Replacing the prop valve in this case would just be pointless. All other models however have a different proportioning valve.

 

Yea I was wondering because the prop valve on the car looked exactly the same as the part picture from Honda.

The hatch is a CX.

 

Dang I just learned something new....lol Never knew the Prop valve were all the same between 96-00 including the Si.

Good info.

That explains alot now.

Hey 94EG8, do you know if that is ideal for our cars to have the same prop valve as the DX with drums vs the Si with Disc? That just seems odd to me and Honda should have a good explaination on that right?

 

All '96 - '00 Civic and '98 - 01 Integra prop valves look the same externally, they're different internally.

Hold on now, I never said they were all the same. Only the CX, DX hatch and the DX, HX, Si coupes share the same proportioning valve. EX coupes, and all sedans use different proporting valves.

The Si also uses larger front brakes along with the rear discs. The prop valve simply controls the brake bias from front to rear, its not specifically linked to rear discs or drums. The 5th gen JDM non ABS SiR hatchbacks had large Del Sol brakes on the front and rear discs and used a 3030 prop valve the same as US CXs, it all depends on how much fluid has to be pushed where.

 

Well my set-up is a bit different and I need a lot of fluid towards the front because my setup consists of the 2 piston Legend calipers on lude rotors with stock discs on the back. Will be upgrading it to the RSX rear calipers with ITR rotors when I need a brake job. For MC I am using the Teggy 1" with stock booster(not able to find a teggy one right now).

The pro valve that I have is from an EX cause it was a donor car that my friend wrecked. Then again the Si and the EX civic run the same brakes in the front....I need to do some research on this.

 

So my prop valve is fine with the EM1 Si brake upgrade? I'll be replacing the booster and MC anyways so I'm just going to use Si parts.

This is the prop valve on my CX EK. It's the same as on my 97 EX daily but on the hatch it has that little valve/section to the left, and that's not on my EX daily. Any idea what it may be?

 

Yep.

I'm not seeing this valve thing you're talking about, unless you're refering to the coupler for the clutch line on the firewall to the left of the proporting valve. If your EX is an automatic that would definately explain its absence.

 

That may be the clutch line I'm seeing, didn't even think about it.

My EX daily is a 5spd though and doesn't have that.

 

Curious if $400 is too much for a complete brake swap from an EM1 Si? It's everything, knuckles, hubs, discs and calipers, rear trailing arms, hubs and calipers, and e brake cables. Complete everything off an Si.

 

i think 400 its too much

 

Also are the GSR and Si fronts the same size discs and calipers?

 

usually the rear disc conversion goes from 100 to 150 and the fronts for 80 so i think 400 its too much

 

Yes!

For the Si brakes you can keep your stock prop valve and brake booster (DX is the same as Si).

 

Really? The DX and Si use the same prop valve and booster? Do you need the Si master cylinder or can the DX one be used also? The only other thing I know besides the brakes would be that you need the flex lines for the Si rear calipers as the DX used hard lines for the drums and also you'd need the Si e-brake cables.

EDIT: Are the Integra brakes the same size as the Si brakes then too?

 

Yes, the Front and Rear 99-00 Si Brakes and 94-00 GSR Brakes are the same size.

Yes, the SI and DX use the same prop valve and brake booster. I know this because it was done in my DX hatch and my DX sedan. We looked up the parts and they were the same part numbers. For the Master Cylinder, use the 7/8 MC from the 99-00 Si since it will just bolt on with no problems! Yes you do need the 99-00 Si e-brake cables, they are a perfect fit for the hatch and sedan.

No need to touch the brake lines, they will mate up with no problems.

 

The rotors are, the calipers aren't.

Hatch, yes same part numbers, sedan no, i've included a list of part numbers below just so everyone knows whats what

I think I understand what you're trying to say, the hardlines are the same, you need rear flex lines from a civic or integra with rear discs though.


Below are the OEM Honda part numbers for every trim level of 6th gen civic without ABS, i've bolded the Si and all models that share the same part number. The list also includes the prop valve from a '98 Integra RS as it will bolt up to a 6th gen civic, but has a different part number than the Si:

46210-S04-952 VALVE ASSY., PROPORTIONING 1998 INTEGRA RS
46210-S04-902 VALVE ASSY., PROPORTIONING 2000 CIVIC CX Hatch
46210-S04-902 VALVE ASSY., PROPORTIONING 2000 CIVIC DX Hatch
46210-S04-902 VALVE ASSY., PROPORTIONING 2000 CIVIC DX Coupe
46210-S04-902 VALVE ASSY., PROPORTIONING 2000 CIVIC HX Coupe
46210-S04-902 VALVE ASSY., PROPORTIONING 2000 CIVIC SI Coupe
46210-S04-912 VALVE ASSY., PROPORTIONING 2000 CIVIC DX Sedan
46210-S04-912 VALVE ASSY., PROPORTIONING 2000 CIVIC DX-V Sedan
46210-S04-912 VALVE ASSY., PROPORTIONING 2000 CIVIC LX Sedan
46210-S04-922 VALVE ASSY., PROPORTIONING 2000 CIVIC GX Sedan
46210-S04-962 VALVE ASSY., PROPORTIONING 2000 CIVIC EX Coupe

 

the Canadian 99-00 sir's have abs standard, yur si's

 

Alright, so I won't need to change the the prop valve for sure since it's the same one as the Si. I checked to make sure the 97 DX coupe also uses the same one and it does. Also, the brake booster is the same too, part numbers check for that also. The master cylinder is different as the part numbers do not check. Is the larger master cylinder needed or can I run the DX master cylinder?

Basically I'm just trying to do a brake upgrade without having to use custom pieces or drill out rotors. Also, I want brakes that will fit under the stock 14" steelies still. Also, I'm not wanting to change bolt patterns either. It looks like the biggest fronts I can go without having to custom modify anything is the 94-01 Integra and the biggest rears are EP3's. Can anyone confirm?

 

You can use your stock MC && booster. I ran integra front & rears on my ek w/ stock bb & mc without any issues. There wasn't much of a change in how the pedal felt like under braking. If you really want to upgrade your bb & mc, ditch the si and go straight a 00-01 GSR or ITR. The MCs are both 1" and your hardlines will line up 100%.

 

Ok change of plans, actually picking up GSR brakes all around instead. I heard something about changing the front spindle because the GSR has too much camber or something? Anyone enlighten me on what the situation is and what needs to be done?