Re: crossflow vs downflow radiators wich is best
that statement is very correct in regards to presure ...there is a myth about crossflows being superior to down flows as far as cooling .. all in all its about SQ inches of cooling surface .. as of 68 most rads went to crossflow as hood lines got shorter .. so no where to go but wider .. so more SQ inches = more cooling .. but you will see many truck rads still run down flows due to the area and hood lines being taller .. look under the hood of a
the vertical tubes of a down flow work well with heat convection .
just a note
64 to 67 Chevelle bb ..403 SQ inches of core .. change to a cross flow conversion 374 SQ inches of core area ... a loss of 29 sq inchs of cooling core surface area .