1403 500 cfm Edelbrock Jet size for 273

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Slantsix64

Slantsix64

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Stock jet size is 0.86 primary and 0.95 secondary on my 1403 500 cfm this is going on a 273, would i need to downsize the jets to dial it in better? was thinking of going 0.80 primary and 0.89. the car will be a daily driver the intake on the 273 is a lb4d. let me know your thoughts thank you!
 
Slantsix64 said:
Stock jet size is 0.86 primary and 0.95 secondary on my 1403 500 cfm this is going on a 273, would i need to downsize the jets to dial it in better? was thinking of going 0.80 primary and 0.89. the car will be a daily driver the intake on the 273 is a lb4d. let me know your thoughts thank you!
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Why not use the manual that Edelbrock provides. It has a matrix for tuning their carbs.
 
Edelbrock has charts, but they do not say what jets to use on a daily driver 273 with an ld4b. I would start with stock jets, good carbs flow fuel to match airflow
 
Edelbrocks are generally lean anyway so just try it first.
 
Gat a wide band meter/gauge! Decent one's are just under $200 and know for sure what way to go! For that price theres no reason to not have one! Will save ALOT of wasted fuel & headaches!
 
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