Carburetor wizard…or someone that knows more then me

[Cheapsunglasses]

I know some people have to have papers to prove things, but if you listen and feel, you can tell differences too

 

[Geoff 2]

Cheap,
Your rich cruise is almost certainly caused by the lack of vac ad. The engine is inefficient because the engine is not getting the cruise timing [ commonly 50-55* ] it needs; it requires more throttle opening without the extra timing & hence your rich cruise mixture. You could mess around with jetting/met rods to try & correct it, but you are really better off buying a new dist from Summit with VA & you can get them very cheaply.

 

[Cheapsunglasses]

Cheap,
Your rich cruise is almost certainly caused by the lack of vac ad. The engine is inefficient because the engine is not getting the cruise timing [ commonly 50-55* ] it needs; it requires more throttle opening without the extra timing & hence your rich cruise mixture. You could mess around with jetting/met rods to try & correct it, but you are really better off buying a new dist from Summit with VA & you can get them very cheaply.

Yeah I kinda figured I was getting ahead of myself, I was trying to see if I could make what I have work, but it doesn’t look like it. So I made a long shopping list, I’m completely redoing the ignition, and I decided to hit the easy button and get a brand new edelbrock 800 cfm avs2 with tuning kit, hopefully it’s as good as everyone says, and it works out

Thank you, and everyone else for your help!

 

[MOPAR MARTY]

Hello everyone, I have a 4327s Carter on my 68 GTX low performance 440. I get great 13:1 afr idling. Acceleration it’s 11:1-12:1. But cruising is 10:1, I don’t know much about tuning carbs, but I do know 10:1 is little rich. I pulled #3 and #8 plug out to confirm it, here’s what they look like

The carburetor is a 3 step rod carb, it has .089 jets in the primary, I guess I should have looked at the secondary jets while I had it apart lol. And it has .065x.062x.053 metering rods.

Suggestions are greatly appreciated! And let me know if I need to give more information!

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u dont make any sense? where r u getting the compression #;'s from?13-1 is NOT a low performance motor !c i guess u ment 13-1 when u posted 13:1?

 

[Cheapsunglasses]

u dont make any sense? where r u getting the compression #;'s from?13-1 is NOT a low performance motor !c i guess u ment 13-1 when u posted 13:1?

The #s refer to Air to Fuel ratio, or AFR for short, as I clearly mentioned.

 

[Dragon Slayer]

That service manual must be wrong with 2 step remark. The 440 carb is 3 Step rods. Good carb. Cruise would be on the rods too if the blades are open any reasonable amount. But as stated, without a vacuum advance your cruise AF would definitely be rich.