Carb throat balance when tuning now a rebuild saga !, those with Zenith carbs can learn from my bad fortune ? |
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Carb throat balance when tuning now a rebuild saga !, those with Zenith carbs can learn from my bad fortune ? |
porschetub |
Aug 29 2023, 11:25 PM
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#1
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Doing a tune on my Zeniths ,cant find an exact rpm range and done a ton of research ;
Bruce Anderson mentioned 1800 in his book, Factory says 1000 in the gary.suggate site factory manual, Haynes manual tells us 1000. So far I have tuned throats @ idle ,1000rpm ,1400 and 1800 on hand throttle and strangely I get the same balance any way ?. Now thinking its not an issue but would appreciate feedback from 6yl guys with carbs,TIA,cheers |
Dion |
Oct 31 2023, 04:59 PM
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#2
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RN Group: Members Posts: 2,767 Joined: 16-September 04 From: Audubon,PA Member No.: 2,766 Region Association: MidAtlantic Region |
Well done Dean, will be like new! Glad you found another vendor. I may need a few new parts for my Zeniths they’re boxed up currently. I need to prep for winter storage soon. Will run tank dry like you did. Maybe i should run another filter pre pump (IMG:style_emoticons/default/idea.gif) .
Keep at it mate! |
porschetub |
Nov 5 2023, 06:08 PM
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#3
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Well done Dean, will be like new! Glad you found another vendor. I may need a few new parts for my Zeniths they’re boxed up currently. I need to prep for winter storage soon. Will run tank dry like you did. Maybe i should run another filter pre pump (IMG:style_emoticons/default/idea.gif) . Keep at it mate! Thanks mate ,dropped carb parts off today and should be ready in a day or so then the long assembly job begins . Pleased to know this guy as he has a great rep as a tuner of Porsche 911's and has owned 2 short wheelbase cars in the past including an "S'' , he is a clever guy and real easy to talk to with a wealth of knowledge on anything with 2 wheels also. Yes Dion I think a secondary fitter has worked for me and certainly can't cause any problems besides I believe others have done this to good result . Some lessons learnt here and will change how things are done ,TBO don't want to do this again (IMG:style_emoticons/default/sad.gif) ,cheers. |
porschetub |
Nov 8 2023, 04:09 PM
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#4
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Well done Dean, will be like new! Glad you found another vendor. I may need a few new parts for my Zeniths they’re boxed up currently. I need to prep for winter storage soon. Will run tank dry like you did. Maybe i should run another filter pre pump (IMG:style_emoticons/default/idea.gif) . Keep at it mate! Thanks mate ,dropped carb parts off today and should be ready in a day or so then the long assembly job begins . Pleased to know this guy as he has a great rep as a tuner of Porsche 911's and has owned 2 short wheelbase cars in the past including an "S'' , he is a clever guy and real easy to talk to with a wealth of knowledge on anything with 2 wheels also. Yes Dion I think a secondary fitter has worked for me and certainly can't cause any problems besides I believe others have done this to good result . Some lessons learnt here and will change how things are done ,TBO don't want to do this again (IMG:style_emoticons/default/sad.gif) ,cheers. Some research and a few small jobs till my clean parts come in . Checked on the fuel we get in my country and the only fuel I continue to run is our regular low octane fuel as it only has 10% ethanol and don't expect an issue with my engine as the 2.2T is low compression @ 8.6 to 1 , the shelf life would be better than the higher grade fuel has more ethanol to boost the octane ,but all suppliers indicate 6 months shelf life max . My fuel was older and the addition of fresh fuel never mixed due to not driving it . Been sorting my last bad ball cup joint on the rear bellcrank to grossbar lever ,jeez remember why I didn't replace it back then, cup was seized on the ball so had cut it off ,not easy (IMG:style_emoticons/default/headbang.gif) (IMG:style_emoticons/default/headbang.gif) ,but now sorted . Carb parts not ready yet as the main bodies found to be much dirtier internally than first thought...worth the wait for a second bath IMO. |
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