Edelbrock tuning _____ originally composed by don at fbo plug the gauge on the lower port on the front of the carb, this should not have your vacuum advance unit hooked to it now let's get the idle down as low as it'll go without stalling, now start turning one of the idle screws in until it starts to loose vacuum or the engine starts to. The switch should have two places to hook vacuum upone you will hook up to manifold vacuum and the other runs to the egr there should also be a ported switch to operate the canister purge valve if your distributor runs a vacuum advance, run that to a ported vacuum portanywhere above the base plate of the carb. Edelbrock carb vacuum nipple edel says use the ported vacuum, even msd 8360 instructions ( a common distributor on street sbcs ) says to hook the distributor's vacuum advance to ported vacuum go figure one needs to determine what runs best for their engine the full time vacuum advance will increase the engine's timing when cruising.
Vacuum advance hook up thread starter mwa start date oct 22, 2011 forums your carb should have a vacuum advance port, usually on the fuel metering block use this line gm had the vacuum advance set up through a thermal switch which prevented any vacuum to the distributor at start up and until the car had reach operating temp with. If your distributor has timed vacuum advance, hook the distributor vacuum hose up to the passenger side vacuum port on the carburetor if it has full vacuum advance, hook it up to the driver's side vacuum port. In a post here about tuning a carb with a vacuum gauge it was stated that distributor vacuum advance should be connected to timed vacuum port( no vacuum at idle vacuum increases with rpm) with the vacuum advance not hooked up at all then hook up to manifold vacuum distributor advance the easiest way to confirm what port you have is. I have an old nissan 280 that i replaced the motor with a 435 horsepower 350 i am not sure if the vacuum lines are correct or if i need to rejet the carb the problem is at high rpm it seems to be starving for gas i have a electric fuel pump in the tank and the mechanical pump on the motor the mechanical pump is new i do not have the manual for the carb so i was guessing on the lines.
Installed the usa for this tutorial with a ruptured fuel line to hook up for proper vacuum and it's the intake but my carburetor s have just wondered if you hooked up your edelbrock afb carb description: edelbrock carburetor is the options i've got an edelbrock states, 1412, the carburetors for. I have a 600 cfm performer carb on my 74 el camino it does not require smog it has a 350 with an edelbrock performer intake and headers and i was wondering which vacum port should i hook up my distributor to the part time throttle on the passenger side or the full time port on the drivers side having it on the full time speeds up my idle rpm to abou 700-900 while on part time it is about at. The fsm lists that port on the carb as the vacuum advance port i have the same set up (273, 904) and have always been hooked to the carb as well. Hello, i've noticed people have been hooking up the vacuum advance to the port on the baseplate and not on the metering block one guy said his engine runs cooler and gets better fuel economy i run a 383 mopar with a holley 600 these other cars were chevys not sure what to do.
I also know that hooking up the vacuum advance to the port on the carburetor will only provide vacuum when the throttle blades are high enough to cover the vacuum port, such as at cruise and part throttle, and will produce little vacuum at idle and wot. The secondary vacuum is at the side of the carb the primary vacuum goes to the dist advance port at the front of the dist if you don't have a dual diaphram dist you don't need the secondary and shoul leave it plugged. Q: where should i hook up my vacuum advance edelbrock responds: if you’re unsure of which port touse, connect the vacuum line to the timed vacuum portthis has novacuum at idle and won’t.
In this example of an edelbrock aluminum carburetor, the manifold vacuum port should be used for vacuum advance to the distributor and not the timed vacuum for our chevelles replacement parts are necessary for all vehicles, and it can be difficult to choose the right parts for your particular model. When you get ready to run the vacuum line from the turbo 400 trans modulator to an edlebrock performer 800 cfm carb, attach the vacuum line for the transmission vacuum modulator to the bottom. Where do the vacuum lines go on the new carb i have a dual advance and it use to be hooked up to a double barrel carb where do all the vac lines hook up on the new 4 barrel edelbrock performer series 1406 carb [url] run the vacuum advance hose to the nipple marked manifold vac on the front of the carb (the vac should be the one on. How to hook up electric chokes many holley’s come with electric chokes above the idle mixture screw, and is generally used for distributor vacuum advance how to switch from vacuum secondaries to mechanical, and from mechanical to vacuum the power system on carter/edelbrock 4-barrel carburetors and rochester quadra jets is. The cliff notes are: try and use full time manifold vacuum for you vac advance on the distributor first it will give you a smoother idle with lower throttle blade setting if you have a 'run on' problem, detonation off idle, or just like the sound of a rough idle, try the other port, (timed or port vacuum.
I have a edelbrock carb# 1406 on my 73 olds 455 w/ hei distributor looking at the carb, should the vacuum advance hook up on the left or right side it's been on the left since i've had the car and it runs fine, but i've been told it should be on the right. 17 the front of the carburetor has three vacuum ports the larger one in the middle is a manifold vacuum port for your pcv valve the vacuum port on the left is a timed advance port and is where you will connect the vacuum line from your distributor if you use timed vacuum advance. Make sure the vacuum advance connection is removed, and now rev the engine up to around 2,500 to 2,800 rpm ideally, the timing now should be somewhere around 34 to 36 degrees to total advance with 34 degrees of total mechanical advance and 14 degrees initial timing, you have 20 degrees of mechanical advance—14 + 20 = 34.
This will give you 10 crankshaft degrees of vacuum advance, and when applied with the correct full manifold vacuum port, idle timing will be the vacuum advance's 10 degrees, added to the 12/14 initial, for 22/24 degrees of timing, just right. There are more vacuum ports on the quadrajet then on the edelbrock and i'm wondering if anyone knows where i should hook everything up i put the brake booster on the back in the same place it was on the quadrajet (there's usualy a tap point right behind the carb mount) or to an up-ported tap on the q-jet i don't want to hook up the. Oh yes there is an extra port on the back of the qaudrajet,you are correct on a edelbrock there is just the brake booster port on the back and the extra ports are on the front which is where i used to hook up my vacuum advance you should try it just block off that port on the carb and go straight into the manifold somewhere.