Radiator

engineguy · 01-29-2019, 02:14 PM

According to NHRA Rulebook, Stock classes:

"Full size radiator mandatory for body used. Aluminum radiators permitted; must retain stock dimensions and appearance. Cutting, denting or elimination of any body, fender, radiator or grille panels prohibited."

Basically, this means that a top/bottom tank (vertical flow) radiator cannot be replaced with a cross-flow radiator and the hose inlet/outlet located must be in the original configuration. Most cars were available with heavy duty radiators, which typically had additional rows of tubes, therefore I don't think that there is any restriction on the thickness of the radiator core used.

01-29-2019, 02:14 PM	#13
engineguy Junior Member Join Date: Jan 2003 Location: Gold Canyon, AZ Posts: 12 Likes: 0 Liked 1 Time in 1 Post	Re: Radiator According to NHRA Rulebook, Stock classes: "Full size radiator mandatory for body used. Aluminum radiators permitted; must retain stock dimensions and appearance. Cutting, denting or elimination of any body, fender, radiator or grille panels prohibited." Basically, this means that a top/bottom tank (vertical flow) radiator cannot be replaced with a cross-flow radiator and the hose inlet/outlet located must be in the original configuration. Most cars were available with heavy duty radiators, which typically had additional rows of tubes, therefore I don't think that there is any restriction on the thickness of the radiator core used.