| [ Total Views: 851 | Total Replies: 5 | Thread Id: 105085 ] |
|
|
 spearsy
Commited Dubber
Posts: 62
Threads: 15
Registered: April 18th, 2009
Member Is Offline
Location: sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on February 15th, 2014 at 03:39 PM |
|
|
Dellorto carbs
I have a set of 40mm Dells on my car which are running well but I am trying to get my head around some theoretical issues.
Carby feeding No's 1 & 2 cylinder mixture screws are between 1 and 2 turns out.
Carby feeding No's 3 & 4 cylinder mixture screws are between 3 and 4 1/2 turns.
Also 1 & 2 carbs idle speed screw is 2 to 3mm further out than 3 & 4 carb but butterflies are open the same amount(3 thou).
Why would this be so?
Carbs have been synced with a uni-syn and all 4 barrels are the same.
I have been pondering over this for a week or so and can't seem to figure it out. Any ideas? cheers Adam
|
|
|
vwo60
Veteran Volks Folk
Posts: 2036
Threads: 71
Registered: February 13th, 2007
Member Is Offline
Location: Pomona Qld
Theme: UltimaBB Psyche Blue
Mood: good
|
| posted on February 16th, 2014 at 09:56 AM |
|
|
I run a set of 48mm DRLA's on my ghia, have you checked the idle jet sizes with a jet gauge, if they have the same size stamped on all four it does
not mean they have not been drilled out, this is what i would do with all the jets so you know you have all the same sizes . then you have a known
starting point.
|
|
|
vassy66T1
A.k.a.: Marcus Vass
Veteran Volks Folk
Wow ... are U reading this?
Posts: 2120
Threads: 76
Registered: June 4th, 2003
Member Is Offline
Location: Brisvegas
Theme: UltimaBB Streamlined2
Mood: Happy to own a VW
|
| posted on February 17th, 2014 at 08:25 AM |
|
|
Agree with the above.
Have you also had the idle mixture screws out to check they are in good condition?
|
|
|
 matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on February 17th, 2014 at 09:13 AM |
|
|
Or the idle mixture screw O-rings? Or any of the seals and O-rings for that matter
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
 |
|
|
spearsy
Commited Dubber
Posts: 62
Threads: 15
Registered: April 18th, 2009
Member Is Offline
Location: sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on February 17th, 2014 at 01:41 PM |
|
|
Thanks guys, do you know what size O rings the idle mixture screw takes as I would be able to get some from work. Jets are definitely the same size.
cheers
|
|
|
matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on February 17th, 2014 at 02:12 PM |
|
|
My guess is around 4 x 1.5 but that is purely by memory
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
|
|
|
