1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

carby tune up specifications

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Old May 16, 2007 | 09:17 AM
  #1  
murry's Avatar
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From: sydney
carby tune up specifications

hi my name is murry i have been looking for carby tune up specifications but cant find them any were i mean like i want to know how many turns on the idle screw and how many turns on the mixture screws things like that its for a rx7 series 3 84 model 12a bridge port
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Old May 16, 2007 | 07:09 PM
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From: St Joe MO
Best advice I can give is to pick up a Weber book or two. It will save you money in the long run. Which Weber are you running? If you don't know, post a pic of it.
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Old May 17, 2007 | 02:53 AM
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From: sydney
hi the ex owner of the car said its 48 and the brand is weber and its got a bigger fuel pump and fuel lines to if that helps
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Old May 17, 2007 | 03:43 AM
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From: NJ
http://www.amazon.com/Build-Power-De.../dp/1901295648

I have read this book. It is very in-depth.
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Old May 17, 2007 | 03:49 AM
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From: St Joe MO
Ask the former owner or post a pic. There are atleast 3 different 48 mm Webers types that fit a rotary, sidedraft, downdraft and w/o a choke/starter circuit.

More info Murry if you want help. I'm not a Dentist, but I feel like I'm pulling teeth to get any info out of you.

If nothing else go here.

http://www.vintagerotaries.org/index.php?showtopic=17


http://www.vintagerotaries.org/index.php?showtopic=28
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Old May 17, 2007 | 07:35 PM
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From: Rocket City, Alabama
Read and study the links trochoid posted above. There is a LOT of information in those articles; it will take quite awhile to absorb it all.

There is no one setting of XXX turns of the screw to tune any Weber carb, especially on ported racing engines. Some people do not know how to tune carbs, but they are mechanically inclined enough that they can eventually learn. Some people never can learn, and those people can screw up something as simple as setting the idle mixture screws. Those people are better off sticking to driving, and paying someone else to tune their car. Study, and then carefully try things, and then study some more.
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Old May 18, 2007 | 09:33 AM
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From: Socal
Originally Posted by speedturn
Read and study the links trochoid posted above. There is a LOT of information in those articles; it will take quite awhile to absorb it all.

There is no one setting of XXX turns of the screw to tune any Weber carb, especially on ported racing engines. Some people do not know how to tune carbs, but they are mechanically inclined enough that they can eventually learn. Some people never can learn, and those people can screw up something as simple as setting the idle mixture screws. Those people are better off sticking to driving, and paying someone else to tune their car. Study, and then carefully try things, and then study some more.
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