Installed NavajoBreak Booster - cab brake light and Holley Carb Vacuum port help reqd
First time posting. I have a 1979 CJ5 with a Holley Truck Avenger 470 carb on an AMC 304 motor . This weekend I uprated the brakes from the standard original master cylinder to a Navajo dual diaphragm brake booster and new cylinder.
Tested the system, after bleeding the brakes and they work okay but have two queries:
1. Vacuum port for brake booster on the Holley carb - I am not convinced the brake booster is working - wondering if I connected the booster port up to the right connection on the carb - see attached photo for setup and the one I connected it to is:
Thanks Zilla, changed the vac port to the manifold now. Check out the picture attached. Any ideas on the brake light issue? Also, the brake pedal has a lot of travel in it now. I haven't started up yet, will this resolve it the pedal travel or do I just need to bleed the brakes again?
Mine comes off in a different location. Like right behind where your coil is.. It is a large brass 90° fitting that I took off the OEM manifold. My brakes go down pretty far too. There is an adjustment behind the Vac booster on the pedal rod.. I have an issue with VAc draw at my altitude. I am installing an electric vac pump to make up for it.. I also know that the MC piston size can affect the braking. Mine now has an 1-1/8" vette MC, but OEM is 1". If the vac pump doesn't get things to my liking I am going to install anew 1" MC..
Thanks for the suggestions folks. The brake light has sorted itself out. Comes on when it should now. I think I just need to bleed the lines a bunch more. Didn't know about the rear shoes so will look into that. Makes sense about half the system working in that case.
Happy with the Navajo booster, not the cheapest option. But when it's your brakes best not going cheap!
I've got the vanco brakes (same style with the vette MC). Different feel from stock but if you hit the brakes on the freeway in panic mode you'll lock up the brakes. Have to tell myself when I drive her to touch the brakes lightly. Once you get use to them their great.