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What fuel pressure do these need to run at? Is it 2.5 bar or 3.0. LET is standard at the mo bar FMIC weber reg.
 

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well yellows are 304cc at 3 bar (43psi), and reds are 359cc at 3 bar, so to get 304cc from reds youd have to drop pressure to about 2.25 bar (33 psi)
 
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