carb size help?

p0prcksandc0ke

New Member

Apr 27, 2007

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sacramento,ca

Oct 12, 2007

#1

• Oct 12, 2007

• #1

will a 600cfm carb be fine on my 390 bigblock just for daily driving, i had my aluminum intake and heads taken off so its almost stock ( till i can afford a new hipo one )

 

F

ForceFed70

That's why they call it "dope"

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Dec 6, 1999

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BC Canada

Oct 12, 2007

#2

• Oct 12, 2007

• #2

If it's mostly a stock engine, It should work OK.

 

p0prcksandc0ke

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Apr 27, 2007

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sacramento,ca

Oct 12, 2007

#3

• Oct 12, 2007

• #3

ok good cause i need one but dont have money for a nice new one right now

 

2bav8

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Nov 30, 1998

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Mesa, AZ

Oct 12, 2007

#4

• Oct 12, 2007

• #4

You'll be fine...

 

M

mikethebike

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Jun 12, 2007

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Greenville, SC

Oct 12, 2007

#5

• Oct 12, 2007

• #5

Assuming the carb is right...it will work very well on a stock 390....now on a 428 CJ, that would be a horse of a different color.

 

p0prcksandc0ke

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Apr 27, 2007

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sacramento,ca

Oct 12, 2007

#6

• Oct 12, 2007

• #6

im glad its going to work hes dropping it off tonight and his shop just rebuilt it, i plan on getting a better one like a barry grant or something when i get the money

 

D

D.Hearne

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#7

• Oct 12, 2007

• #7

Why'd you remove the aluminum intake and heads in the first place? Don't make sense to me.

 

p0prcksandc0ke

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Oct 12, 2007

#8

• Oct 12, 2007

• #8

there was a crack in the bolt hole for the distributer so i got a stock one for free and it didnt want to go on correctly with my aluminum heads, so we put the stock ones back on

 

D

D.Hearne

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#9

• Oct 12, 2007

• #9

Why didn't you just have the crack welded ?

 

p0prcksandc0ke

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Oct 12, 2007

#10

• Oct 12, 2007

• #10

they tried that but the heat just made the bolt hole bigger so they sent it off back to edelbrock

 

D

D.Hearne

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#11

• Oct 12, 2007

• #11

You needed a more competent welder is all. Sorry for the questions, but it seems to me you end up spending more than you should in mechanic's fees.

 

p0prcksandc0ke

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sacramento,ca

Oct 13, 2007

#12

• Oct 13, 2007

• #12

it was all done for free thankfully , im going to put the 600 one on tomarow any guesses on how far im going to have to unscrew the 2 screws? and how do i tell if its running lean or rich?

 

Fast63

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#13

• Oct 13, 2007

• #13

Start at 2 turns out with both idle mixture screws, screw them in and out till it idle's the highest, or if you have a vacuum gauge, hook it up to manifold vacuum and turn them till you get the highest vacuum at an idle, but you should have them within 1/4 turn of each other.

 

p0prcksandc0ke

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Apr 27, 2007

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sacramento,ca

Oct 13, 2007

#14

• Oct 13, 2007

• #14

im not worries about the idle right now im talking about the other 2 screw to adjust if its runnign lean or rich

 

JDS68Stang

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New York State

Oct 13, 2007

#15

• Oct 13, 2007

• #15

D.Hearne said:

You needed a more competent welder is all. Sorry for the questions, but it seems to me you end up spending more than you should in mechanic's fees.

Click to expand...

As a certified welder I'll second that.

 

p0prcksandc0ke

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Apr 27, 2007

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sacramento,ca

Oct 13, 2007

#16

• Oct 13, 2007

• #16

there was a crack going through the bolt hole the patch it up but then we couldnt find a bolt to fit it. cause of the crack going through it.

 

Fast63

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#17

• Oct 13, 2007

• #17

p0prcksandc0ke said:

im not worries about the idle right now im talking about the other 2 screw to adjust if its runnign lean or rich

Click to expand...

There are only two screws that adjust anything, and they are for the idle mixture circuit. Follow my instructions for that. To tell if you are running lean or rich otherwise, you need to look at the spark plugs after a little run time, white being lean and black being rich. Tan = perfect.

The idle circuit affects the whole rpm range, but you should set it at what it likes at an idle and change metering rods/jets as needed.

 

D

D.Hearne

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#18

• Oct 13, 2007

• #18

p0prcksandc0ke said:

im not worries about the idle right now im talking about the other 2 screw to adjust if its runnign lean or rich

Click to expand...

I assume you're still messing with an Edelbog. Get a manual on how to tune it. You need to take more time to learn the basics. Right now it seems to me you're groping around in a dark room. It pains me to see you this way.