what should my rpms being at idle? i have a holley 4 barrel been adjusting it today and set the timing at 10 degrees and the rpms are at about 800-1000 is this good base for it?
I like mine to idle at 550 in neutral, and 500 in gear. But that is just me. I want the car to rock as each cylinder fires and the engine surges. Makes it feel bigger than it really is. Freaks out the children in the minivan next to me, also. But 750-800 is a fine idle speed. I used to do 650/600, and that was fine. Don't want to go too high. some carbs kick out of the idle circuit at around 900-1000 rpms, and start running the primary circuit.
stock cam and an auto c4 with a 1600-1800 torque converter like i tried to get it lower but its wants to die when it get lower then about 800rpms
how do i check for leaks??? yea thats what i was think that it might be somewhere bc at idle it goes from about 1000- 800 like slowly in and out
first visually inspect all the vacuum lines, replace any old looking ones. If you cant find the leak then step number 2 is to spray the lines with carb cleaner or starting fluid if the engine fluctuates then you've found your leak.
ive replaced all the vacuum lines that was there when i bought the car there is no vacuum lines on the carb it self they all are blocked off with like rubber covers that seal it off
i just read the bottom of the pic you posted and it says idle needs to be set with the trans in drive??? ive been doing it while in park does that matter???
Yup...It does. If your idle isnt steady and you dont have any vacuum leaks or valvetrain problems. Your carb may be set too lean causing the engine to surge...
ok then ill do it while in drive and yea i was told to set the fuel mixture screws back to stock and ive turned the screw richer about a full turn guess just need more tuning
to set the fuel mixture screws you should use a combination of a vac. gage and tach. hook the vac gage up to a manifold vac port. now what your trying to do is get the highest vac reading you can. adjust the idle mix screws about a 1/4 turn at a time alternating from each one. as you get closer to ideal the idle speed should go up. readjust the speed to where you want when it gets to high. once any adjustment makes the vac drop you have found the ideal mixture point.
I like my idle set as low as I can get it without stalling at an idle. On a stock engine that is about 600 in Drive. Where you set the idle will be determined by the cam you use and the converter that you have.
