dual master for drum brakes

[hiball3985]

Gasman,
I couldn't help but notice the thing made from several adapters and an air hose fitting in the valve cover, what is that for?

[gasman826]

Gasman,
I couldn't help but notice the thing made from several adapters and an air hose fitting in the valve cover, what is that for?

Temporary fitting to pressurize the crankcase.  Using 5 psi of air, I test for gasket and seal leakage.  There is negative pressure in the crank cast and valve covers...vacuum on the back side of the pistons via Moroso vacuum pump.  Big cubic inches creates big back pressure.  Vacuum pump makes HP and helps keep the gaskets and seals in place.

[hiball3985]

Temporary fitting to pressurize the crankcase.  Using 5 psi of air, I test for gasket and seal leakage.  There is negative pressure in the crank cast and valve covers...vacuum on the back side of the pistons via Moroso vacuum pump.  Big cubic inches creates big back pressure.  Vacuum pump makes HP and helps keep the gaskets and seals in place.

Thank you for the explanation, I'm way behind the times on all the hot rod equipment.

[canadian_ranchero]

found some adapter fittings for the master cylinder.goes from the bubble flair to the stock size brake lines

[RICH MUISE]

That's what I used. Any fittings/adapters you need for any plumbing...fuel, brakes, A/C, etc. can be found at www.purechoicemotorsports.com.  They are in Lake Havasu, Az. Was there last year...great folks.
They have Metric to AN fittings including banjos. About the only stuff I needed they didn't have were A/C compressor adapters. I found some Springlock to beadlock A/C fittings at www.coldhose.com
Pure Choice also has springlock adapters for the fuel logs if you want to go that route (springlock to 6AN), but they're pricey,

[canadian_ranchero]

found some adapter fittings for the master cylinder.goes from the bubble flair to the stock size brake lines

one did not fit.back to the store