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J_A_M
 Post subject: Tuning SU Carbs (twins)
PostPosted: Tue Jul 12, 2005 10:07 am 
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1360cc
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Joined: Tue Mar 16, 2004 11:32 am
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I am searching for info on tuning SU's.

I just pulled this off the net, and thought others might like to read it.

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

Hope it helps. 8)
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scotty
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PostPosted: Tue Jul 12, 2005 1:46 pm 
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Location: BEHIND YOU!!!!!
After spending the last few days trying to tune my twins....it does help, cheers.

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czerial
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PostPosted: Tue Jul 12, 2005 1:53 pm 
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that is very interesting. Saved to my computer for future ref!!
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drmini in aust
 Post subject:
PostPosted: Tue Jul 12, 2005 7:37 pm 
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religious status
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
Took me a whole 10 mins to tune Barneys 2 recon'd HS4s..
You never forget how!
Now I wonder.. do I have the very best needles for it out of the 800? available now.. :roll: :lol:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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h0nk
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PostPosted: Tue Jul 12, 2005 7:58 pm 
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Cool, ive been meaning to tune mine properly... anyone know where to get some of these tools from?
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Chris
 Post subject:
PostPosted: Tue Jul 12, 2005 8:36 pm 
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1098cc
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Location: Helensburgh NSW
h0nk wrote:
Cool, ive been meaning to tune mine properly... anyone know where to get some of these tools from?


A length of plastic hose to listen with replaces tjhe fancy meter everyone recommends. The special jet spanner for adjusting the jet should be available from Midel. Use the piston lifting method for setting the mixture. You actually should not need a spanner to adjust the jet but they do become difficult to turn sometimes. As Kevin says SU's are dead simple to tune once you have the right needle in them. There is no simpler carby.

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Chris

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drmini in aust
 Post subject:
PostPosted: Tue Jul 12, 2005 8:42 pm 
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Location: near Baulkham Hills, NSW
Yep like Chris I just use a bit of plastic tube to balance them- one end in mouth of carb and the other in my earhole.
Just have to use my `good' ear.. :wink:
You can still buy Colortunes, but I'm not sure who carries them. I just read the plugs... :lol:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Chris
 Post subject:
PostPosted: Tue Jul 12, 2005 9:07 pm 
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I say to everyone who has a set or even one SU to tune. Make sure the shafts and bushes are in good condition, iIf not life can get a little difficult. SU's don't like air leaks. If there is more than a minor amount of movement then get them overhauled.

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Chris

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CPOCSM
 Post subject:
PostPosted: Wed Jul 13, 2005 12:16 am 
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drmini in aust wrote:
You can still buy Colortunes, but I'm not sure who carries them. I just read the plugs... :lol:


Got my Colourtune from Autopro Belconnen - pure luck and made it simpler to tune them up. However now sold the twin SU's on Ebay so will see if it works on the dellorto too.

Pricey at $89 but saved me a lot of agro with the ear method

Rob Forsyth
Miniot!!

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Mini Mad
 Post subject:
PostPosted: Wed Jul 13, 2005 12:21 am 
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ET 13.457 seconds , OH YEAH !!!!
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Location: Somewhere Around Sydney
Last time I was at Padstow they had a whole bunch...

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