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I have a number of master cylinders either marked as "7/8" or "1" in the casting on the top just in front of the reservoir.
The 7/8 measures up at 7/8 of an Inch so far so good but the "1" is "zackly" the same. Yes I was hoping for a larger MC for my big brake install...
Any ideas what the "1" means???
odd. i would have though that was a 1" myself.
ill have to look at my master cyl the next time it is off to see what the actual size is.
mine is super firm but i like it cause its less sensitive so i can really mash them without locking them accidentally.
Brian
I believe the 1 is for 21mm bore dia. The 4 is 24mm bore dia.
so 1 would be smaller than 7/8
Yep 1=21mm, then 7/8", followed by 4=24mm, then the truck's (d-150)1-1/8" bore. The bigger you go the less pedal movement there will be, and the harder you will have to press on stop pedal. I took out all my 24mm MC on my L-bodies and installed the 7/8". IMO, a good compromise between modulation and adequate fluid quantity (flow and pedal travel). 7/8" for the win (lol)!
Todd
For all you guys with rear drum brakes and a seemingly super hard brake pedal, before you blame your too big of MC, I would check your rear wheel cylinders. They are probably frozen or in the process.
They will bleed perfectly, but won't actuate much or at all. Doesn't seem to take much moisture in brake fluid to get those rear cylinders to not work correctly.
Todd
What rear brakes for your 21mm MC? Actually, what are the front brakes? The 21mm MC is too little for my tastes with 11" brakes up front and the drums in my Lancer.Quote:
Originally Posted by 4 l-bodies
This is cool that there are three MC
I've run the D150 MC and the 24 on 11" cars. The D150 does require quite a bit more force but is good for racing modulation. The 24 is STOP RIGHT NOW when you hit it good and hard. Lot's of fun on grandma's new yorker.
I use a 24 on my Sundance DD with 11 fronts and solid rears. the stopping is great with my Hawk pads (LTS winter and HTS summer)Quote:
Originally Posted by GLHNSLHT2