I don't think 12" of vacuum is enough for the booster. How are you getting more vacuum by revving it up?
it went up to 18-20" it is definitely not enough
Agreed with Jared....im pretty sure the power booster needs 16-18" of vacuum to work right. IMHO, i think the vacuum cans by themselves are a waste of money....i had one and it didn't really help.
With the addition of my electric vacuum pump my brakes operate better than factory without a doubt. It wouldn't hurt to have a canister inline with the pump so it could store the unused vacuum, I'm considering adding a canister but i want it hidden and that's hard to do with the layout of my engine bay. However, my summit pump has the relay/switch built into the unit and it shuts off at 22", once the level drops it cycles until it reaches that again.
Beauty of the pump is it can be mounted anywhere....i have mine mounted on the trunk ledge as to not add stuff into the bay.
I am going to do a pump
we tested it today by running a vacuum line from my buddy's 87 s10 RWD blazer to my brake booster and running the s10 and checking the brakes and yes the booster is functioning correctly therefore I need more vacuum at the booster...
could there possibly be a vacuum leak in my car...highly doubt it because if I unplug the hose it spikes the idle up high and when u plug it back up it drops the idle down. so I just think the cam simply can't make enough vacuum at idle or low RPM for that matter.
In addition to you're other issues, if the dash wiring has been screwed with, i would yank the dash and clean up the wiring as you suggested. Wiring gives me anxiety lol, but I'm fairly good at it and have redone almost all of my wiring here and there by removing butt connectors and t splices i put in when i was young, and soldering/heat shrinking everything back together.
Might as well pull the seats....it's what 8 or 10 nuts to remove and the seats are out, carpet kits are reasonable via rockauto which sells the ACC brand (best for our cars imo).
Don't get discouraged man, the end result will be a ride that's in better shape than when you got it. Hell, you did the swap in like a month or 2!! If it makes you feel any better, my cutlass has been under the knife for 5 years...1-1/2 without a fresh motor, and probably another year before its done!!!
I personally hate wiring as well but it is doable. My boss knows the G-body better than anyone i ever met , he was a tech for GM in the 80s, in fact he took a piece of paper and off of memory drew out all the wiring harnesses, colors and order off of memory...
my boy also has a electronics business and is insane with wiring so he could always help me out if need be
also the dash apparently does not need to be removed to do the carpet so I will just address that at a later time once the car is drivable (all electronics functioning, new cluster that I am making installed, fully functioning brakes, etc
😉
especially cause at that time i might do a bucket/console shifter swap as well but money is tight right now from doing so much in such a small period of time.
just got the window motors and door lock actuators in the mail today so i have to install them soon.
on the vacuum pump note... what is the best brand/price/model?
I saw JEGs an summit both have pumps for mid 200s , then there are pumps that cost over 500 bucks... so what is the difference? I prefer to be in the mid 200 dollar range obviously !