For carbureted applications rough surfaces help promote fuel atomization and suspend the fuel in the air. Not the same for EFI (as far as pre-injector intake tract is concerned)
------------------------------------------------------------------ 1992 300ZX NA 5 Sp (Dead) 1990 300ZX NA Auto 2+2 (Dead) 1990 300ZX TT 5 Sp (Stock Turbos) (Est. 400 HP) 1990 300ZX TT 5 Sp (GT600R) (Est. 600 HP) 2004 G35 Sport 6MT (DD) 2008 Honda Civic (DD) 1969 Chevy C10 (Toy) 1969 Chevelle (Toy) |