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Username Post: edelbrock carb set up        (Topic#364621)
norm55 
Newbie
Posts: 9

Loc: fl
Reg: 05-25-13
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



 


Rick_L 
Member #409
Posts: 27828
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
03-15-21 01:08 PM - Post#2816219    
    In response to norm55

Only if you're too lean now.



 
norm55 
Newbie
Posts: 9

Loc: fl
Reg: 05-25-13
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 .



 
Rick_L 
Member #409
Posts: 27828
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
03-15-21 02:38 PM - Post#2816223    
    In response to norm55

  • Quote:
it shows a little richer on cruise



So you don't trust the chart? Why did you mention it then?



 
norm55 
Newbie
Posts: 9

Loc: fl
Reg: 05-25-13
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




 
niftyfive 
Member
Posts: 189

Loc: Colorado
Reg: 02-07-05
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’

NIFTYFIVE


 


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