Thread: su carbies

Originally Posted by mateusz

is there a way to check stuck open needle valve from outside carb? take fuel line off and check if needle is moving i suppose. if it is on both carbs then it must be fuel float on one of them i suppose.

Yes, remove the intake elbow and watch to see if fuel wells up around the needle when the piston is manually pushed up. This will indicate a sunk float OR stuck needle, both of winch require the removal of the carb to check/ rectify.

Is it a low or hi compression 4.6? the 3.5 heads are OK at low engine speeds, the restriction of smaller inlet ports will help a little RE gas speeds. Best thing to do though is port match as best you can, especially exhausts. Who wants/ needs to run a carb 4.6 at 4000rpm anyway

JC

Originally Posted by 33chinacars

If you need to know more about SU needles search for ' WinSU v2.6" Full of comparisions and stock settings /Recomendations etc

Also talk to the guys at SU MIDELS

Gary

I have the full SU factory listing of needles and a long list of OEM applications.

Visit your bank manager before going to SU Midel. SU Midel cater to the cheese cutter cap and pukka moustache vintage sports car crowd. The ones who read Australian Classic Car not Restored Cars. Akses in East Brisbane are better.