How much vacuum should I have at idle?
In park I have 11" and in gear 9.5"
The engine is a 340 cast iron exhaust manifolds and a spread bore 71 intake.
Car seems to perform well but it only has 1000 miles on a rebu
I have the same vacuum @ idle... also 340 with x heads hp manifold and spreadbore intake...topped with a TQ Carb
I am running 18 deg. @ idle with 16 deg. advance...
because with lower numbers @ idle... the engine runs like crap.... this type of cam "loves" the higher numbers.. Check the timing...
I never got more vacuum than 11ish....or close to 12ish