Carter Thermoquads ~ 'More General Information'

1972 Mopar 400/255 HP 'Big-Block' Engines

#6140S {Manual Transmission}
#6090S {Automatic Transmission}

Primary ........ 1 1/2" {1.500"} ......... Venturi 1.186"
Secondary .... 2 1/4" {2.250"}

Primary Jets ...... .095"
Secondary Jets .. .137"
Metering-Rod ..... 1939 {Economy .070" ~ .058" Mid ~ .040" Power}

The 'larger' {1.500" Primary} Thermoquad was advertised 800 to 850 CFM's.
but these units were closer to 787 CFM's.
------------------------------------------------------------------------------------

The #6166S Thermoquad was a 'California-only' Carburetor for the
'new' 400/255 HP 'Big-Block.

The Jets were the same as the {#6140S and #6090S} Carburetors,
but the Metering-Rods were different, as they came through with the
{#1938} units.

Metering-Rod .... 1938 {.071 Economy ~ .051" Mid ~ .040" Power}