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anyone know anything about SU's?

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whatnow Custom Title Time!

1,000 posts · joined Jan 2003 ·

#307497
i'm tinkering with my non vw 60's car, and need some basic help with the SU's.

the car has been sitting for about 2-3 years with no driving and not much running. i should be taking it to get blue slipped in today or tomorrow (with any luck). the prob is that it is running really rich, but was fine when parked.
i was wondering if this could be due to the oil in the dashpots draining out over time? if so what oil do i need to use and how full should they be?

any help would be greatly appreciated.

thanks

henry.

NCH-003 Officially Full-On Dubber

334 posts · joined Feb 2003 ·

#307606
It could be due to the oil in dashpots being low, but you could try topping up the oil and changing the needles.
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whatnow Custom Title Time!

1,000 posts · joined Jan 2003 ·

#307652
thanks. i'll try topping up the dashpots.... i hope singer oil is the right stuff.....
as for the needles, i'll stick with whats in there as i got them set up by a guy who has been tuning SU's on 60's Volvos since they were new (but is not answering his phone today.)

ancientbugger Custom Title Time!

1,986 posts · joined Mar 2004 ·

#307717
SU's normally used straight engine oil but also if it's been standing you may have to check the condition of the diaphragm

Freddie Fender Officially Full-On Dubber

328 posts · joined Jun 2004 ·

#307765
Singer oil was what you usually put down the pots of an SU carbie. Work it up and down a bit. Jetting them is easy. Balancing twin SU's, wind them fully in, then wind them back out 2 1/2 turns. Then listen like crazy from there. It was how I used to do my Mini Cooper's twin SU's. It came straight from the mouth of an old rally mechanic with the Mini's. Worked a treat too.
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