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baldy Guest
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Posted: Fri Jan 06, 2006 3:41 pm Post subject: tuning rejetting 40 idf carbs |
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Hi folks, I am new to this so bear with me ,over the last year ive been building/restoring a sprint body work welding and so on thats done spray shop at end of feb .as for the engine its running and sounds mighty fine but i require information about rejetting before running on rolling road. carbs are as follows 36 choke 55idle 145main has any one done this before. help  |
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Serpent33 Alfa Sprint
Joined: 06 May 2003 Posts: 210 Location: Singapore
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Posted: Sat Jan 21, 2006 10:02 pm Post subject: |
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Hi there. Based on the dellorto seting, I suspect that you are running lean. I rec'd 150 at least. Standard 32 choke is already running 142. I had selected jets based on AF reader and 155 main 180 air corrector is just nice (1:12 under load). I had chose 175 air corrector for a slightly richer high end (1:11 under load).
Do note that the set up is meant for dellortos and I am not sure if it's applicable for webers. There is a high chance that I might be wrong due to unknown emulsion tubes which changes the jet requirements. Good luck.
You might want to try- original jet size/original choke size X enlarged choke size. Round up to the bigger next available jet. _________________ Each time I speed I say, "Dear lord, make me fast and accurate..." |
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baldy Alfasud
Joined: 23 Jan 2006 Posts: 67
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Posted: Fri Jan 27, 2006 10:38 am Post subject: |
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sorry i forgot to say its a 16v engine with 8v carbs on.i think the chokes are 36 and emulsion tubes f11 . thanks |
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Serpent33 Alfa Sprint
Joined: 06 May 2003 Posts: 210 Location: Singapore
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Posted: Tue Jan 31, 2006 6:50 pm Post subject: |
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Hi. I have cheacked the Weber manual. I think you are running a little lean. And if you might get a better response if you posted in maintenance section. _________________ Each time I speed I say, "Dear lord, make me fast and accurate..." |
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Rees Cees Alfasud
Joined: 01 Nov 2005 Posts: 48 Location: Netherlands
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Posted: Tue Jan 31, 2006 11:00 pm Post subject: |
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the only thing you can do for the right settings is go to a Dynojet for the right settings.
and on a 16v you have to use at least 40mm carb´s no 36 mm |
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baldy Alfasud
Joined: 23 Jan 2006 Posts: 67
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Posted: Tue Jan 31, 2006 11:40 pm Post subject: |
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the carbs are 40mm idfs with 36 chokes |
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