The master cylinder in my 1988 CRX Si D16A6/Y8 head is failing. This car is a daily driver and autocrosser, so I am looking for the most braking power I can get. Which master cylinder assembly can I bolt in for maximum stopping power? Accord wagon 15/16?

BTW: I have searched the Knowledge Base and can see nothing on this (please no flames).

 

the most common and easiest is the 90 prelude 2.0 si.

 

Yes the most common is the 15/16" mc from the prelude, accord, or the 90-91civic ex. There is also the option of using a 1" integra mc. JonathanED3 on here has this setup.

 

If you still have the stock brakes i'd suggest the 91 ex, 89 accord lxi, or 89 prelude mc's. If you have DA, 91 EX, or SiR front brakes and rear discs i'd get the DA mc/booster (non-abs).

 

I put a 1 inch 93 Integra GSR ABS master cylinder in my 89CRX this week.
I had an Integra 15/16 in there before.
I lost feeling with the 1 inch. The slightest push really makes the car stop.
I'm thinking of switching back to 15/16 to gain a little more control.


Something to be aware of is that the only 1inch cylinder is from an ABS car and ABS cars use a 10mm and a 12mm brake fitting. A normal non ABS car like a CRX uses 2 10mm fittings. If you swap to an ABS unit you need to either flare a new 12mm fitting on or get an adapter.

I couldn't find the adapter so I made one. If you need one let me know.

 

right. because a bigger master cylinder will not actually give your car better stopping power. it will move brake fluid to the wheels quicker making you think that they feel a little better, but in fact, when you apply the same amount of force to the brakes the bigger master cylinder will put out less pressure, making it very difficult to stop. same force, less pressure....= slower braking

 

also the proportioning valve might be different on that new m/c (control of the rear brakes). this ensures that the fluid travels to the rear of the car first before the fronts so the car dosent nosedive b/c the drum brakes (i assume you have drum in the back) take longer to fully expand away from the wheel cylinder. the only reason to change this (or a new m/c) would be if you got discs in the back in which case the distance the front and rear pistons would have to travel would be about the same. also discs have less clamping force then drums...less pressure.

 

I would like the rears to provide more braking power. A possibility would be using an in-car proportioning valve (Wilwood). Or can this be done at the master cylinder with a different valve, such as an 1" versus the stock 15/16 valve?

Keep it comming - this is GREAT!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">If you still have the stock brakes i'd suggest the 91 ex, 89 accord lxi, or 89 prelude mc's. If you have DA, 91 EX, or SiR front brakes and rear discs i'd get the DA mc/booster (non-abs).</TD></TR></TABLE> Nicely said!!!!! Im running a 92 da non-abs master and boster and ef9 sir front knuckles and da rear brakes. Honda should have made it this way from the start!