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Jzsquared
Samba Member
Joined: August 16, 2014
Posts: 218
Location: West of Chicago, IL
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 Posted: Thu Nov 20, 2014 8:57 am Post subject: New start up question breaking in cam with new carbs |
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So I have a long way to go before I start up my new build but I have a question about that. I will be installing new dual weber 40s and have set them up according to the weber book which states the car will idle very low almost like a tractor when it first starts up. The next step is to set the mixture speed so on and so on, well the cam manufacture states no idling and rev it to 2k for twenty minutes.
How is in the hell am I supposed to rev it up for 20 minutes when it will take a few minutes (probably longer for me) to set the carbs ? |
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vince1
Samba Member
Joined: December 14, 2003
Posts: 823
Location: Burgundy, France
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Howard 111
Samba Member
Joined: July 09, 2005
Posts: 1827
Location: Virginia
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| Posted: Thu Nov 20, 2014 9:07 am Post subject: |
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Forget about the carbs on first startup. The most important thing is to break in the cam the way the manufacturer suggests. After the cam is broken in, THEN adjust the carbs.
_________________
1973 Karmann Ghia
Turbocharged, Fuel Injected
http://www.thesamba.com/vw/forum/viewtopic.php?t=531270 |
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Northof49
Samba Member
Joined: July 22, 2013
Posts: 1759
Location: Winnipeg, Manitoba, Canada
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| Posted: Thu Nov 20, 2014 9:34 am Post subject: |
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Good question. One I've been thinking about as well. I plan to use a set of already set up carbs, even though they aren't the ones I plan to use after its broken in and on the road.
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1958 Karmann Ghia owner |
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esde
Samba Member
Joined: October 20, 2007
Posts: 5966
Location: central rust belt
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| Posted: Thu Nov 20, 2014 9:57 am Post subject: |
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| If you have questions about your jetting, it's a good idea to err on the rich side for break in. A freshly built motor runs hot to begin with, no sense possibly running lean, and even hotter. |
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jfats808
Samba Member
Joined: December 10, 2007
Posts: 5022
Location: oahu hawaii
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| Posted: Thu Nov 20, 2014 12:04 pm Post subject: |
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| esde wrote: |
| If you have questions about your jetting, it's a good idea to err on the rich side for break in. A freshly built motor runs hot to begin with, no sense possibly running lean, and even hotter. |
X2
Idles =1.5 x intake valve
Mains= 4 x venturi, 4.1 mini strokers, 4.2 bigger strokers
I do it this way also. In regards to the initial adjustments upon starting, go 2 full turns from plate closed to open. Keep a screwdriver in your pocket to adjust down/up once u got it running. 2 turns will be around 2k. Dont panic, youll have time when its running. It takes a few min to get warm..
_________________
2276 IDA's 86C 11-1 DD !
2017 48 Trijet DRLA's W125
| Rockstar Suzuki wrote: |
You might as well put 10 year build in your bullshit sig, as it will NEVER run. Also your a dick |
You can always learn something new, even from a fool.
Check your oil levels routinely! |
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Jzsquared
Samba Member
Joined: August 16, 2014
Posts: 218
Location: West of Chicago, IL
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| Posted: Thu Nov 20, 2014 5:55 pm Post subject: |
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| Thanks for the help, I will make sure to rev it up right away like Engle suggests |
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