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Old 10-06-2010, 03:24 PM
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600 Holley Vac Secs Advise Set Up On Weiand 6/71

hi guys. i am having problems with my set up on my holley 600s vac secs.i have 2 of them on my weiand 6/71 on 351w
timing seems to be ok as i have had it running and have just timmed it up and is within what i have been told on here and also my ecu supplier.

so what jets would you reccomend for primarys and secondarys ?

size power valves ?

i have been told as a rule of thumb to open the mixture screws each side of the metering bklocks by 1 and a half turns to get it running. is a blower engine different ?

i have read about having no choke on so as not to foul the plugs ?

once its all set up whats the best way to start it from cold ?

would higher octane fuel help out ? am running 95 from the pump but saw today there is a garage selling 99 ulitma.

dont want to keep asking loads of questions, so basically what would you do with the carbs and any starting tips.

i have added new jets to the carbs and different power valves and springs so i need to remeber what they were. been some time. prob a year since getting back on it.

thanks guys

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Old 10-07-2010, 04:02 PM
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holley carbs

have been reading the posts on here regarding the holleys. there is a ball bearing in the carb by the secondarys ? should it be in or out for blowers ? have heard mixed opinions on this ?
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Old 10-07-2010, 08:53 PM
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I wouldn't run a vac referenced carb like that. Maybe boost referenced secondaries though.
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