Triple SU's

Technical advice Q&A

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jagman1970
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Joined: Tue Nov 27, 2012 2:45 pm
Great Britain

#1 Triple SU's

Post by jagman1970 » Tue Jul 28, 2015 2:08 pm

Hello Friends

If I turn the slow running screws anti-clock do I increase the air flow into the carbs and thus weaken the mixture. So then I need to adjust the mixture screws to compensate.

Many thanks for your time in replying.
Keith
1970 2+2 owned 40 years, 348TS

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mgcjag
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#2

Post by mgcjag » Tue Jul 28, 2015 3:07 pm

Hi Keith...the manual says...move slow running screws till hiss in the intake is similar on all intakes....then adjust all mixture screws by equal amounts untill fastest idling speed achived....consistant with even firing....see manual page C.9....Steve
Steve
69 S2 2+2 (sold) ..Realm C type replica, 1960 xk150fhc

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Mich7920
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#3

Post by Mich7920 » Tue Jul 28, 2015 3:23 pm

Hi Keith,
As steve told you, follows precisely the manual page C8 and C9.
You'll save time, your engine and your nerves...
It's important to disconect the carbs and set up them one after one.
Also important to balance them at last.
Good job.
Michel
1965 E Type FHC - On the road / 1963 E Type OTS - on the road after Angus Restoration

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christopher storey
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#4

Post by christopher storey » Tue Jul 28, 2015 3:28 pm

The slow running screws have no effect on mixture strength whatsoever . Anticlockwise increase the flow ( as you imply ) and vice versa . The jet setting, and therefore the mixture, is exclusively controlled by the jet screw which is the small one at the outboard lower end of each carburetter

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Topic author
jagman1970
Posts: 24
Joined: Tue Nov 27, 2012 2:45 pm
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#5

Post by jagman1970 » Thu Jul 30, 2015 8:43 am

Thanks to all for the replies.
Keith
1970 2+2 owned 40 years, 348TS

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