SU Hif44 vac advance

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timwilks13
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SU Hif44 vac advance

Post by timwilks13 » Sun Jul 07, 2013 3:26 pm

Fitting my SU today but noticed it doesnt have a vac advance pipe. I got the SU as a pair, and the wrong one of the pair (the one not fitted) has the vac advance....any clues?
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Darrell
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Re: SU Hif44 vac advance

Post by Darrell » Sun Jul 07, 2013 5:06 pm

You can get these jobbies............
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Re: SU Hif44 vac advance

Post by ScottieJ » Sun Jul 07, 2013 6:17 pm

Darrel those plates put the vac takeoff on the wrong side of the butterfly for an SJs vac advance set up.

Tim just pull the pipe out carefully with some pliers and a bit of a twist. Then find a drill bit the same size as the hole and drill one in the same position as it is on the other carb.

I then put a dab of loctite on and push the pipe in for a good seal.

Either that or you could swap the throttle linkages etc. off the carb with no vac take off and fit them on the one with it.
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Re: SU Hif44 vac advance

Post by timwilks13 » Sun Jul 07, 2013 6:42 pm

cheers Scottie! the hole for vac advance on the other su looks like it goes all the way through into the mid chamber bit (the bit with the throttle flap), but its a tiny 1mm hole, do I just drill all the way through with the larger bit, or drill a little 1mm hole then a slightly larger one on top to hold the pipe?
1986 SJ410 - Furry dice, new window winder.

10 kinds of people in this world, those who understand binary and those who dont.

if you can read this you're too close to the monitor, sit back and save your eyes!!
My build, formally Trotters build.

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Re: SU Hif44 vac advance

Post by Darrell » Sun Jul 07, 2013 6:47 pm

"Darrel those plates put the vac takeoff on the wrong side of the butterfly for an SJs vac advance set up." My Bad :oops:

What are they good for then :D
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Re: SU Hif44 vac advance

Post by twiss » Mon Jul 08, 2013 2:44 pm

The work well on minis!!! I was looking for something like that for ages that would fit inbetween the carb and air hose/box connector... but apparently it wont work correctly if its on the wrong side of the piston :(
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Re: SU Hif44 vac advance

Post by ScottieJ » Mon Jul 08, 2013 4:04 pm

timwilks13 wrote:cheers Scottie! the hole for vac advance on the other su looks like it goes all the way through into the mid chamber bit (the bit with the throttle flap), but its a tiny 1mm hole, do I just drill all the way through with the larger bit, or drill a little 1mm hole then a slightly larger one on top to hold the pipe?
Did you look the other side of the butterfly, the hole is usually the same size all the way through, make sure you clean out all the aluminium filings after you have done it though.
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Re: SU Hif44 vac advance

Post by timwilks13 » Mon Jul 08, 2013 4:08 pm

oh right no I didn't, in the garage tonight so will have a look, cheers!
1986 SJ410 - Furry dice, new window winder.

10 kinds of people in this world, those who understand binary and those who dont.

if you can read this you're too close to the monitor, sit back and save your eyes!!
My build, formally Trotters build.

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timwilks13
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Re: SU Hif44 vac advance

Post by timwilks13 » Mon Jul 08, 2013 9:05 pm

went 4mm all the way through the back side of the butterfly and held in with some loctite 660 hopefully will do the job!
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1986 SJ410 - Furry dice, new window winder.

10 kinds of people in this world, those who understand binary and those who dont.

if you can read this you're too close to the monitor, sit back and save your eyes!!
My build, formally Trotters build.

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Re: SU Hif44 vac advance

Post by dan_2k_uk » Mon Jul 08, 2013 9:14 pm

That will do the job :D
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