Is my 800cfm carb to big for my engine

[tan top]

Does the vacum gauge have to be in the manifold or does it work if i put it in the carb also,i have a vacum unit near the IMS screws that i dont use,there is two of them and the other goes to ignition vacum.

/Petri

connect it to any vacuum port below the throttle plates   ,!!    easy way  is just temporally  pull the vacuum pipe off that goes to the vacuum canister for the head light doors !!  on the rear of the intake , plug it in there 

[Petri.]

Nice,thanks to you all, ill get back how it went at the inspection.

/Petri

[Petri.]

So know it is inspected and has swedish plates,went pretty good, c/o was just under maximum 3.8 and max is 4.5 ,only problem was rear brakes that i have to show up again, 1.3 at left and 1.9 at right ,its 11" drums so i believe they have manual adjustment that i read here,propably just some adjustments because everything looks new behind the drums when i looked long time ago just to check one side,have any tips at the brakes for me,were also at cruising saturday,near 8 hours driving,had to screw the idle up because it wanted to die when cruising at idle,what causes that problem its propably over 1000 rpm,and damn it takes fuel,you get 12miles at one gallon,know way you can go under that,400d fuel this weekend.

Petri

[firefighter3931]

Petri, the venturies on that 800cfm carb are large so it will use more fuel than it would with a more moderately sized unit. 

A 650cfm carb would have smaller venturies yet still provide plenty of air/fuel for your 383  The smaller carb would certainly be more efficient and have better throttle response.   


Ron

[Petri.]

Thanks,will i loose any power with a 650 and will a edelbrock 650 work right out of the box on my engine or do i have to change anything in it, and what is the ventury,some kind of fuel air channels?

Petri

[bobs66440]

The 650 should work very well and have good power. It will most likely run much better than the 800. The only thing I ever had to do after installing an Edelbrock carb was adjust the idle. And I only did that because I felt like I should do SOMETHING...it really needed nothing. Just to drive it! That's my experience anyway.  

On the AVS, the air valve for the secondaries are adjustable, so you may want to play with that to get the best response...

[Petri.]

Hi again have been a while ago,have been driven the charger all summer with the 1412 800cfm,we have adjusted the carb and the ignition at the beginning of the summer and it wont work good when cruising at idle for a longer time, then it dies and its tuff to start again and run well after that,  ok friends i have a proposol and lets see if you like it and want to help me.
Last week i got home a new car from dubuque iowa,one owner chrysler 300 -67 440 2dr with all the papers,he ho sold it to me is 83 years old today and i have spoked to him a couple of times,he also wrote me 3 a4 papers about the car through the years,also got speeding tickets from 70 and 78 from highway state patrol, but lets go to the questoins, the 440 is missing a little at idle and upp about 200rpm but the worst is when you hit the throttle when the engine is fully warm it dies and only goes  at idle and 1 more inch of the pedal,i now 1 thing that is bad and it is very very old spark plug wires,so i will change the ignition to msd performance or put in pertronix and efcourse everyhing else new in the ignition line,so i checked the car numbers upp and googled it, holley 4160,r3667,2843151,date code 683 what that means? so i found out that it is the stock carb on the 440 and that it is only 570cfm,  is that the stock carb and why is it so small on a 440, so what i want to know is can i put the 1412 800cfm on the 440 and get it work well with good mpg or is the holley good for the stock 440, so if the edelbrock 800cfm would work good on the 440 i would put it there because i anyway have to change the carb on the charger, finally here is a video of the 300 and my uncles 300 4dr.
http://www.youtube.com/watch?v=qLXMcQJHaYQ

/Petri

[bobs66440]

As previously stated, these engines don't need big carburetors unless you are racing at high RPMs for extented periods. For street use, the small ones work fine.