Low vacuum should I add a electric boost 

14 to 15 inches of vacuum at idle is really not a problem...Do the Power brakes work OK. ??

Just for my own curiosity...What Are the cam specs @ .050...

intake..duration -n- Lift..

Exhaust..duration -n- lift..

Lobe separation angle (LSA)...

Edited August 10, 20232 yr by TWO LANE BLACK TOP

1 hour ago, Matador red said:

Low vacuum should I add a electric boost 

Most likely no! Give me the cam spec again. Lift intake & exhaust also duration! .500 lift is a healthy lift for a 400. What is the vacuum in gear?
My 1969 Z28 which was almost 600 hp in gear at idle pulled 4” of vacuum & in neutral only about 14”! It got 6mpg & had a loopy idle most guys would kill for. It was what is known as a scavenger engine, wasted a lot of fuel because of how it pulls fresh fuel in & through the cylinder before the exhaust valve closes. This effect drastically reduces vacuum, but in a 12-1 compression engine it has impressive results. This is one of the reasons Z’s did not have power brakes or air!

The car came with power brakes be nice to keep them

1 hour ago, TWO LANE BLACK TOP said:

14 to 15 inches of vacuum at idle is really not a problem...Do the Power brakes work OK. ??

Just for my own curiosity...What Are the cam specs @ .050...

intake..duration -n- Lift..

Exhaust..duration -n- lift..

Lobe separation angle (LSA)...

Rebuilt 18 years ago I doubt I can find any papers engine builder died suddenly 10years ago close friend. I parked car 11 years ago  was told It was cam air 4 specks 

19 minutes ago, Matador red said:

The car came with power brakes be nice to keep them

Gotta run right now, I’ll get back you tomorrow, but you should be able to keep the power brakes! Just need a vacuum canister.

33 minutes ago, Last Indian said:

Gotta run right now, I’ll get back you tomorrow, but you should be able to keep the power brakes! Just need a vacuum canister.

Never thought that would help 

18 hours ago, Matador red said:

Never thought that would help 

There are many different types, but a good one, like this one from Summit will give you what you need. It has a check valve that allows for vacuum to be stored. So when you are pulling 14 or 15” of vacuum the canister stores that. So even if you need to apply your brakes in a low vacuum condition you still have 14 or 15” of vacuum to apply to the brakes. 14 to 15” of vacuum is more than enough to operate most all vacuum assisted parts. Brakes, air, etc.
https://www.summitracing.com/parts/cvs-vpr700#overview

Backed off timing to tdc picked up vacuum to 16 pounds now brakes feel good 4 barrel still silent have rebuild kit for it

On 8/11/2023 at 3:40 PM, Last Indian said:

There are many different types, but a good one, like this one from Summit will give you what you need. It has a check valve that allows for vacuum to be stored. So when you are pulling 14 or 15” of vacuum the canister stores that. So even if you need to apply your brakes in a low vacuum condition you still have 14 or 15” of vacuum to apply to the brakes. 14 to 15” of vacuum is more than enough to operate most all vacuum assisted parts. Brakes, air, etc.
https://www.summitracing.com/parts/cvs-vpr700#overview

Very responsible price thanks