In my opinion, the wheel cylinders size is not that important. I believe the stock drum brakes should have plenty of stopping ability. I would add the wheel cylinder brackets to "lock" the wheel cylinder to the backing plate. With this type of wheel cylinder, they tend to move a little front...
Here is my opinion on master cylinders and calipers.
I do not like the 1982-1988 step bore master cylinders. I believe these master cylinders give you a spongy pedal because of the internal transition from a larger volume bore to a smaller bore. These are meant to work with LOW drag calipers...
Brian D’s 8 second, twin turbo, 5.3 LS G-Body Cutty with manual brake conversion.
https://www.manualbrakes.com/g-body.html
Buick Regal (1978–1987)
Chevrolet El Camino (1978–1987)
Chevrolet Malibu (1978–1983)
Chevrolet Monte Carlo (1978–1988)
GMC Caballero (1978–1987)
Oldsmobile Cutlass...
Customer’s G-Body MANUALBRAKES.com manual brake KIT install.
https://www.manualbrakes.com/g-body.html
If you have any questions about the install call, text, or email. 832-264-5566 or [email protected]
Brian D’s 8 second, twin turbo, 5.3 LS G-Body Cutty with manual brake conversion.
https://www.manualbrakes.com/g-body.html
Buick Regal (1978–1987)
Chevrolet El Camino (1978–1987)
Chevrolet Malibu (1978–1983)
Chevrolet Monte Carlo (1978–1988)
GMC Caballero (1978–1987)
Oldsmobile Cutlass...
When using the plug method, it lets you know that the master cylinder is holding pressure AND that there is no air.
If you are getting piston movement, then there is air OR the master cylinder is defective.
You can also try bleeding the master cylinder like a caliper: crack both plugs, push...
...and the outlet size for the line fitting going to the rear brakes is 1/2-20 instead of 9/16-18. The line fitting going to the front brakes is the same 1/2-20.
SUMMARY
Normal, left hand drive S-10: Both outlets on the engine side and both outlet sizes are 1/2-20 inverted flare.
Right hand...
A step bore MC will work with any caliper.
A strat bore MC will ONLY work with normal NON low drag calipers.
That being said, I am not a fan of step bore master cylinders as their pedal feel is usually terrible.
1.125” bore master cylinder with a B-Body 12” dual diaphragm vacuum booster...
With the setup you described, 1.0” bore master cylinder with the stock booster.
1.125” bore master cylinder with a B-Body 12” dual diaphragm vacuum booster.
1.0” bore from a right hand drive 2000 s-10. RAYBESTOS MC390572. If the reservoir doesn’t fit under the hood, exchange the reservoir...
Also, in my opinion, keep the stock calipers and upgrade to aftermarket brake pads. This is the best bang for the buck.
You can also go with the Wilwood oversized 2.75" diameter piston caliper.
These are 4.3lb each and have the best piston area of any bolt in caliper. Part number is...
In my opinion, if your are going to spend the money, upgrade to the Blazer setup.
There is NO performance benefit to those calipers.
Stock Caliper Weight = 6.3lb
Wilwood Caliper Weight = 4.6lb
1.7lb savings. Is that worth the $400 spent for two wilwood calipers?
Also, the Wilwood Dual...
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