What will the pedal feel like if I put this bigger master cylinder on my stock booster. I took off my stock booster and put the new one in kinda but I can’t get the cover on when it’s in the car. I don’t feel like dropping 3 out of 4 engine mounts or taking the intake manifold off. I got it in by taking the cover off the booster but now I can’t get the cover back on while the ex booster is in the car because it’s spring loaded and the way the booster cover goes on.
My question is how would the pedal feel if I used the stock si booster with the 15/16 MC. Yes I already got the 40/40 proportioning valve on and the rear disc from da Integra. Has anyone does this setup where they kept the old booster. The ex one is impossible to get in (in full form) without jumping through fire. Thanks!

 

I have the EX 15/16 MC on the Stock Si booster, it bolted up fine and operates normally. As I noted on the other thread you commented on, you will want to make sure the MC is chosen based on your brake setup.

15/16 is good for larger DC2 calipers, but if you have rear disc and stock fronts (I think that's what I read on your other post) you'll want the 7/8 MC.

 

I heard different. I heard that if you have rear disc you’ll want the 40/40 prop valve to distribute the fluid
To the rears and in order to distribute more fluid you need more fluid aka bigger mc.

 

Correct - 7/8" MC is larger - the stock Si MC is 13/16

13/16 - Stock w/ drum brakes
7/8 - Stock w/ rear disc
15/16 - EX/DC2 calipers w/ rear disc

Running the EX 15/16 MC will work - but your brakes will be more sensitive. Without ABS, you want some wiggle room so you don't lock them up easily.

 

Ive run all the set ups on mine, and 15/16" master with ef ex(dc2) front brakes with rear da brakes and 40/40 prop valve was the best. The 7/8" master does allow more modulation of the brake pressure, and the booster swap offered no noticable difference in performance. Now the booster delete i tried was very noticeable, and i would not reccomend it for the casual driver. If you wanted to delete the booster, then the 7/8" m/c is the way to go. The 15/16" master is going up in price, so I'd reccomend getting one sooner than later if you want it.