Was is the experience with radiators more stroker or modified 928 engines?
Has the stock radiator been retained?

 

old radiators do get clogged over time and lose efficiency, so it depends on how clean it is. but it is a system, so it also depends on what fans you are running as well.

 

I ran the stock radiator on my race car for years with no issues

 

Sounds good. I run a stock radiator on my SC 86 with a 10" rear fan and have had no issues either and it can get very hot here in summer. Now I'm looking at doing some internal engine mods rather than external, so my question.

 

i picked up Marks new Aluminum unit, and it keeps my car cool in LA stop/go traffic.. but my stock one was dying.

 

6.5L stroker here, stock 78-86 radiator, no problems with cooling at all.