Technical Picking The Right Brake Master Cyl?

So i finally got a reverse swing arm assy for my 50 Crosley project and i'm not sure what size master cyl i should be running. The set up is disc/drum. Rear wheel cyl are 3/4. Small style calipers in the front but it's a small car haha. The calipers originally came off a car with a 13/16 bore master cyl but it was a boosted master and mine will be manual. So should i aim for a larger bore 7/8 or?

ps my pedal assy will be supported more just up for testing right now.
Don't hate on my gas pedal haha

 

Larger bore will give you a harder pedal as it will move more fluid. Smaller bore will give you less fluid movement with a higher pressure.

 

There is actual math to determine master cylinder bore size or you can email or call Wilwood tech support with info related to your question. Pedal ratio, along with sizes for each brake piston will help them determine what the best master cylinder diameter is (generally). Their contact page is here.

 

Smaller bore will mean less pedal pressure if you're not using power brakes... Larger bore will take a strong leg to stop unless you're using power assist....

 

How about pictures of your Crosley for those of us with little cars?

 

Pedal ratio get as much leverage as possible then figure your master.. 1 inch might be the ticket..

 

Thank you. Good looking car. What is that engine?

Sent from my SM-T350 using The H.A.M.B. mobile app

 

Thanks and getting there and its a s10 efi 4 cyl with 5 speed. wanted to go older iron duke but there's nothing like that around me anymore do to scrappers.

 

Sorry for derailing your brake question. I have a '34 Austin and whenever I find anyone with a small car, I just have to poke my nose in.

 

We don't mind!

 

It's ok don't blame ya i do the same and i never heard of Austin just Austin mini haha it's a 1934?

 

Sweet CC!! ! i just installed a front clip of a cc on my shop. I see you're in Ct you know Ted Dellacamera?

 

I suppose I should dig up a picture now.

 

Going to a 7/8 will make the pedal harder to push. You need to go the other way if you aren't using a booster or try 13/16 to start. Like others have said, contacting Wilwood would be your best bet.