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.

ken robinson · 01-29-2019, 04:00 PM

Main thing it's not a round track or street car so you dont need the 3or 4 row core , so a 2 row should work wright . The cost is very different between different makes so is it a quality thing or paying for the name ?

Joe Martens · 01-29-2019, 04:33 PM

Ken, check out Spectra Radiator. I used one on my car, direct factory aluminum replacement and very reasonable, and good fit. I believe any NAPA can get them. Also, keep in mind most aluminum radiators I have seen have 1 inch cores vs 3/4 inch cores like most factory radiators.
https://ecat.spectrapremium.com/products/CU337
Hope this helps.

01-29-2019, 02:14 PM	#1
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.

01-29-2019, 04:00 PM	#2
ken robinson Member Join Date: Dec 2001 Location: tomsriver nj Posts: 477 Likes: 74 Liked 213 Times in 85 Posts	Re: Radiator Main thing it's not a round track or street car so you dont need the 3or 4 row core , so a 2 row should work wright . The cost is very different between different makes so is it a quality thing or paying for the name ?

01-29-2019, 04:33 PM	#3
Joe Martens Senior Member Join Date: Dec 2001 Location: North Olmsted, Ohio Posts: 787 Likes: 627 Liked 196 Times in 69 Posts	Re: Radiator Ken, check out Spectra Radiator. I used one on my car, direct factory aluminum replacement and very reasonable, and good fit. I believe any NAPA can get them. Also, keep in mind most aluminum radiators I have seen have 1 inch cores vs 3/4 inch cores like most factory radiators. https://ecat.spectrapremium.com/products/CU337 Hope this helps. __________________ Joe Martens AA/Stock 3969 Last edited by Joe Martens; 01-29-2019 at 04:39 PM.