Yet another weber jet question

[wat]

Right now my 510 has an l18 with a 32/36 in it with the stock jet settings

 

Main Venturi: 26/27
Aux Venturi: 3.5/3.5
Main Jet: 140/135
Em Tube: F50/F6
Air Corr Jet: 165/160
Idle Jet: 55/50
Pump Jet: 50
Needle Valve: 2.00

 

My car runs pretty rich with this basic setting. My plugs are pretty black. This is a tired motor and I need to step it back a bit. I have 130/125 mains and I want to know if I can just throw them in there or if I need to redo all the jets

 

If I were to jet it leaner. Is it simply a matter of of buying every jet setting one or two steps back? or could I replace the mains and be fine?

[banzai510(hainz)]

be honest its already close to a l16 setting.

whats you oil usage??????

 

fuck it just drive it.

[wat]

It's not burning any oil. it's tired about about 10psi below specs but everything is 1/2 lb between each cylinder so it's not leaking. Valves are adjusted to a T. It just smells of gas and I get about 18mpg on 95% freeway. Initial puff of smoke when I gun it but again. I'm not losing any oil. So I can only assume because it's rich.

 

Thoughts?

[banzai510(hainz)]

I giess you could step it down to the number you gave .

 

smell of gas?

You got your crankcase tube to the pvc valve?

And the top valve cover to the aircleaner?

[EricJB]

Too much fuel pressure? Webers dont like a lot of pressure. Maybe the pump is pushing fuel past the the needle and seat. Or possilby float level.