V8jon

Well-Known Member

• Feb 18, 2012

• #1

This might be a silly question but iv'e just changed the engine on my series 2a V8, it had strombergs on before but now with the new engine it has su's and i can't remember which way it is to turn the mixture screw to weaken/richen
Could someone please refresh my memory :der:

Cheers

 

fett

Well-Known Member

• Feb 18, 2012

• #2

in is weaken out is richen from memory

 

V8jon

Well-Known Member

• Feb 18, 2012

• #3

That'll do me,cheers

 

Soloby Rob

Banned

• Feb 18, 2012

• #4

fett said:

in is weaken out is richen from memory

Click to expand...

I aint done one for years but I'm sure it t'other way round.

 

fett

Well-Known Member

• Feb 18, 2012

• #5

cant see how as in closes the valve. starting point is wind all the way in and the 2-3 turns out.

 

Soloby Rob

Banned

• Feb 18, 2012

• #6

fett said:

cant see how as in closes the valve. starting point is wind all the way in and the 2-3 turns out.

Click to expand...

Not on an SU mate.

 

V8jon

Well-Known Member

• Feb 18, 2012

• #7

Now i'm confused

 

lyron

Active Member

• Feb 18, 2012

• #8

on su carbs winding in will weaken the mixture winding out will ritchen it. or at least it did on my rover v8. austin mini. austin 1300vdp.maxi etc.

 

Last edited: Feb 18, 2012

D

dellboy1959

Well-Known Member

• Feb 18, 2012

• #9

Try this link mate

http://www.zhome.com/ZCMnL/tech/su.html

 

fett

Well-Known Member

• Feb 18, 2012

• #10

lyron said:

on su carbs winding in will weaken the mixture winding out will ritchen it. or at least it did on my rover v8. austin mini. austin 1300vdp.maxi etc.

Click to expand...

Thats what I said!

just ignore sloby rob he is a wind up merchant

 

V8jon

Well-Known Member

• Feb 18, 2012

• #11

dellboy1959 said:

Try this link mate

http://www.zhome.com/ZCMnL/tech/su.html

Click to expand...

Cheers for that,I know what I'm doing now

thanks again to everyone

 

landowner

Pensioner Pete

Full Member

• Feb 18, 2012

• #12

If they are HIF with the float bowl under the carbs then remember to srew in to richen the mixture (screw in to put more fuel in)

The early carbs with the float bowl on the side and the mixture screw underneath is up (in) to weaken and down (out ) to richen

Just tweak them until the engine runs at its fastest on idle and adjust throttle stops to bring idle down again.

 

Soloby Rob

Banned

• Feb 19, 2012

• #13

fett said:

Thats what I said!

just ignore sloby rob he is a wind up merchant

Click to expand...

Just done a Google and found this. If this is the type of SU we're on about here am I still a wind up merchant. :bounce:

Tuning - Single | SU - The SU Carburetter Company



Forgot to say, if it's the old type of SU take the dashpot and piston off, turn nut under carb anti clockwise till jet is flush with bridge, then turn nut clockwise 12 flats, re assemble and adjust as normal.

 

Last edited: Feb 19, 2012

fett

Well-Known Member

• Feb 19, 2012

• #14

if they were simple they wouldnt have invented efi