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3G brake master in a 2G

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Yes, JNZ does - I posted that a while back ? Regardless, I have used two of their kits, one ABS kit and one non-ABS kit - they both fit and work perfectly. Well worth it, the kits solve all the mismatched flare problems.
I searched this thread and didn't see it. Apologies if it's a repeat.

Do the adapters leak? I read in another thread folks complaining about the adapter for the 3g MC leaks, not specific to JNZ's kit, but the adapters in general.
 
No leaks from the JNZ kits at all.
 
I am currently working on a project 2G car with a factory MB895931 brake valve, 2G DSM vacuum assist brake booster with 3G brake master cylinder, I am also in a space crunch due to a huge intake manifold. I actually had to trim out the brake fluid level indicator sensor/plug as well as some trimming around the reservoir to clear it to the frame rail as well as the intake manifold. I am using a chopped down Banjo Bolt, 10mm x 1.00 Single, Short (.78" Shank) with thin crush washers and a 29" total length -3AN PFTE line with 45* and banjo ends on the rear port (closer to firewall), and then a Male 10 x 1.0mm Metric Convex Seat to 3AN, Steel fitting on the front port (closer to engine) with a ~40" total length -3AN PFTE line with a 90* fitting on both ends . I am using two Male 10 x 1.0mm Metric Concave Seat to 3AN Male, Steel adaptor fittings on the proportioning valve to attach the braided lines to it. I trimmed the stock plastic sleeved brake line brackets to accommodate the two additional braided hoses so it is clean and as compact as possible.

I will post pictures of the finished product.
 
After searching through a few sites and matching the part numbers I came up with the following vehicles that have the same booster as the 00-05 eclipse

99-04 Mitsubishi Galant

01-05 Chrysler Sebring

01-05 Dodge Stratus

I can't physically verify that I have seen them in these cars, maybe someone else can? I was going to check the junkyards tomorrow and just take a look.
 
After searching through a few sites and matching the part numbers I came up with the following vehicles that have the same booster as the 00-05 eclipse

99-04 Mitsubishi Galant

01-05 Chrysler Sebring

01-05 Dodge Stratus

I can't physically verify that I have seen them in these cars, maybe someone else can? I was going to check the junkyards tomorrow and just take a look.

I have seen them in the 99-04 Galants and I have one of them on my parts shelve.
I have also seen the sebrings/avengers/stratus... some of these have a remote Reservoir as opposed to the master cylinder body mount style, I have not yet seen a remote reservoir setup on a 99-04 Galant or on the 3g eclipse brake master as of yet.

Tips for junkyard scavenger dsmers, if you want to save some time or a more easy job pulling the brake master cylinder out, hunt for a 3g eclipse or the 99-04 galant they are more easier to remove then the sebrings and stratus ones. also make sure you see the 1 1/16 numbers stamped on the brake master cylinder bore, before you commit to buying it.
 
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Just to get a good clarification...I have a non abs setup. I can buy ss lines or adapters doesn't bother me either way but which ones do i need? I've seen so many adapters and numbers...just confused a lil on which is for abs or non abs.
 
Just to get a good clarification...I have a non abs setup. I can buy ss lines or adapters doesn't bother me either way but which ones do i need? I've seen so many adapters and numbers...just confused a lil on which is for abs or non abs.
If you get stainless lines made up you would only have to have one end have a fitting that would have the same screw pitch and I think flared or non flared end (can't remember)that would fit into the 3g master cylinder. The other end would have the same fitting that is used on your 2g.

Don't go with any stupid adapters period just get the correct ends put on and you will have no issues. I was lucky that the MC I received had the old fittings still connected and I was able to go to the hose shop,and they found the same exact fittings that would work. They also fitted the other end with some new fittings that would work for the 2g.
 
Seems like my brake pedal is a bit too hard since doing this 3G BB MC upgrade. I tried to make a sudden stop after speed and the tires locked up. The pedal cannot reach the ground.Was a little nerve racking but recovered . I have brembo brakes on the rear and Baer brakes in the front which are only two piston cobra mustang calipers.

Anyone else have this very stiff pedal feeling?

I was told that the issue could be that the upgraded 1inch plus piston bore in the MC could be causing the issue ,and that I would not have this stiff pedal feeling if I had brembo's all around. The Baer calipers perhaps do not have the capacity to deal,with the extra volume and pressure from the 3G MC hence the hard brake pedal.

So how is this upgraded setup working on guys cars with stock calipers?

I ordered a Stoptech Big brake kit 4 piston for the front ,same setup as the brembo's just waiting for them to get here and see what happens.
 
...hence the reason of upgrading to the 3g brake booster.
I have the 3G system(BB and MC) on my car now and the brakes are stiff as hell. They do not feel normal on hard braking she locks up. Did you read what I posted? Brembo's are in the rear Baer's are in the front, pedal is too damn stiff and I am wondering if others have encountered the same issue!
 
Do you have the 1 way check valve in place between the BB and intake manifold?

Also, what prop valve are you using?
 
Pull the vacuum line off the BB and compare the pedal feel with the line connected. Should be a quick and easy way to tell if the BB is working.

If the pedal feel with the car off is the same as with the car running, that's also a quick and easy test to verify BB operation.
 
Ok I will test it tomorrow. I do remember when I first drove the car with the hose on wrong the brake pedal would go all the way down to the floor and the car took a long time to stop. Friend told me to make sure I have the hose on right due to the check valve. Low and behold it was on wrong. Fixed that issue but the brake pedal became hard and touchy and does not go down to the florr. If you try she just locks up. When the car is off and coasting the brake pedal then becomes extremely hard so in order to stop I have to turn the car back on very quickly or she will just roll into something. The stiffness when car is off was reminiscent of driving the car without power steering. Run the car and she does soften up but still hard and touchy.
 
Don't know how folks are getting the 3G setup to give them a good brake feeling with the stock dsm calipers but with this 17/16 mc and the volume of fluid that it pushes I strongly believe the Baer brake capacity or piston size(perhaps too small) is causing the issue I am encountering with the rear lockup and extra firm pedal.

I'm gonna check with TCE and try to figure on a compatible setup I can use with the present rear brembo,3G mc and bb I have.

Spoke to Stop tech about a set of stop tech calipers and rotors I have here in my possession not installed from RRE specifically built for 2g dsms. 13 inch rotor 4 piston caliper. Piston bore sizes are 40mm and 36mm for these stop tech calipers. Not safe according to stop tech in combo with my brembo rear setup. Stock front evo brembo calipers have 46mm and 40 mm. Evo Rear brembo's are 40mm 40mm. I hope Tod at TCE can make me something with similar piston bore dimensions as the front Evo calipers that will just bolt on.

Tod has a huge 4 piston stage 4 setup but the caliper is extremely wide. I forgot the piston dimension but rim depth could become an issue. Good chance I will go with their 6 piston setup since its thinner but we will see. Bottom line is I really don't feel like taking all these parts out ,Rear brakes mc and BB . I'm net rested to see what front brakes would help alleviate this lock up issue I am having.

Stay tuned.
 
Just to add to this. I did the 3G BB and MC upgrade in advance to putting my brembos on. I'm still on the stock calipers (single piston in front and singles in the rear). I have none of the issues you are describing ceedawg. My pedal feel is a bit stiffer (not extreme though) than before and my whole system is non-abs.
 
and I had Stoptech calipers for an Eclipse on front (eclipse piston sizing), with Evo 9 rear calipers, and my brakes worked just fine in a racing environment for years. No longer have the Stoptechs as I moved to Evo X front brakes but the datapoint kinda shoots a hole in the theory here.

edit - I neglected to say this was with the 3g master cylinder only (2g dsm booster).
 
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For what it's worth, this is my setup that works just fine as well:
Front: 4 piston AP calipers (38.1/41.3mm) designed for an Evo 9
Rear: Evo 9 calipers
3g MC
Stock 2g booster
 
I'm using a 3G master cylinder and stock GVR-4 BB. 3KGT front calipers and stock rears, with no issues.

How old is you prop valve, and did you have any issues with braking previously? Also, did you confirm the BB was functioning?
 
Okay earlier did a panic stop and she would not stop immediately! No good. Had to keep my foot on the firm pedal and she eventually stopped . Thank goodness no obstacles in front. Without a panic stop she seems like she will slow down or stop like normal. Weird!

With the car off the pedal is hard which is normal. Turn the car on the pedal softens up but is stilll hard. While the car is running I take the booster hose off the intake mani and the pedal becomes hard as if the car were off. Still puzzled but Im possibly coming to the conclusion that this booster could be bad I dont know. Everyone here has some positive responses just my results are dangerous!

My prop valve is original as the car is a 95. I never had issues with my braking before.
Prior setup Baer Claw 13inch Cobra Stang with 2 piece Eradispeeds in the front. Stock 2g awd calipers in the rear with stock size power slot rotors. Stock BB and MC. May look to putting back on the stock BB and see what happens. I also have abs in my car.
 
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Ok being that I figure the BB is defective I also figure why not get a new check valve. Had to order one for an Evo since ours are discontinued. It came yesterday from JNZ. Took the old check valve off the car this morning to replace it. Tested it by blowing through it and it allowed me to blow both ways. Damaged goods!!:notgood: So since I can blow through this thing the BB has got to be damaged. Put on the Evo BB check valve got in the car and the pedal is still hard.:notgood: Well I think that concludes that so I ordered another 3G BB from eBay for 50.00. Running 29psi on this thing definitely had to do it in. Also explains where my big boost leak happened to be thanks to the defective 21 year old check valve.

Stay tuned!
 
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Replacement
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Defective. Rubber deteriorated around pushrod causing major vac leak.





Replaced the Brake booster. The old one was shot. The rubber around the pushrod was completely gone deteriorated. The idle in my car is much smoother and my ISC is a lot more stable. Was having a hard time adjusting her to 30 with the biss screw before on my new rebuilt TB but now the idle is cake since changing the defective booster. I believe It's possible I may have purchased the BB this way and being clueless about inspecting the thing I installed it and had a very very hard brake pedal. Will test drive her during the week and post pics of the bad Brake booster. The pedal does feel firm but softer than the defective setup. Can't wait to test drive her and then later on put on my 4 piston Stop Techs and rotors.
Gonna put the Baer brake setup for sale down the road to recoup some $. Stay tuned again for my test drive comments.
 
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Replacement
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Defective. Rubber deteriorated around pushrod causing major vac leak.





Replaced the Brake booster. The old one was shot. The rubber around the pushrod was completely gone deteriorated. The idle in my car is much smoother and my ISC is a lot more stable. Was having a hard time adjusting her to 30 with the biss screw before on my new rebuilt TB but now the idle is cake since changing the defective booster. I believe It's possible I may have purchased the BB this way and being clueless about inspecting the thing I installed it and had a very very hard brake pedal. Will test drive her during the week and post pics of the bad Brake booster. The pedal does feel firm but softer than the defective setup. Can't wait to test drive her and then later on put on my 4 piston Stop Techs and rotors.
Gonna put the Baer brake setup for sale down the road to recoup some $. Stay tuned again for my test drive comments.


im having the same issue with my isc on link very unstable, ill look into this ill do a boost leak test and soap and water this gasket
 
Any updates to this @ceedawg ?
The car right now is up for the winter. It will be receiving a few major upgrades. New fic bosch 1650 cc injectors for E85 use. The stoptechs will be installed after the car is retuned for E85 with the use of a flex sensor with the ecm link.
As far as the new brake booster is concerned brakes seem pretty normal. No locking up or having to push extra hard to get brakes. Will keep all updated. Hoping to have movement on the car mods mid April.
 
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