norm55
Newbie
Posts: 9
Loc: fl
Reg: 05-25-13
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03-15-21 10:05 AM - Post#2816203
i have a 55 belair. it has a chevy 305 ci with an edelbrock 500 cfm my set up is 86 main jets 67x55 metering rod and purple spring. 19" manifold vac.
#6 on calibration ref chart. i was wondering if i went to #17 on the chart. which is 83 main jet 57x49 metering rods should that give me better mileage it shows a little richer on cruise but jets are smaller
any info on this would be helpful
thanks norm
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 Rick_L
Member #409
Posts: 27828
Loc: Katy, Tx, USA
Reg: 07-06-00
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03-15-21 01:08 PM - Post#2816219
In response to norm55
Only if you're too lean now.
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norm55
Newbie
Posts: 9
Loc: fl
Reg: 05-25-13
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03-15-21 01:35 PM - Post#2816221
In response to Rick_L
rick l. so if i am too lean i am using more fuel than if i was running richer? i don't think i am too lean now .
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Rick_L
Member #409
Posts: 27828
Loc: Katy, Tx, USA
Reg: 07-06-00
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03-15-21 02:38 PM - Post#2816223
In response to norm55
it shows a little richer on cruise
So you don't trust the chart? Why did you mention it then?
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norm55
Newbie
Posts: 9
Loc: fl
Reg: 05-25-13
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03-15-21 03:55 PM - Post#2816229
In response to Rick_L
i trust the set up .just not too much experience with it .looking for most economical set up . i get about 10 mpg on short hops around town
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niftyfive
Member
Posts: 189
Loc: Colorado
Reg: 02-07-05
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03-18-21 06:45 AM - Post#2816352
In response to norm55
Short hops? Not enough time too get to full op. temp? Im running same carb (elec choke 1403). Watch your tailpipe and plugs to fine tune the carb. I found the chart to be spot on except my elevation is 7000’
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