They are located in New Jersey. The phone number I have for them is 609-333-2618. Getting someone to answer was hit or miss. There are two cores in the radiator, with quite wide spacing to allow airflow through the radiator.
Some of my experience, if you're interested. I also was running the FF Dynamics radiator, with the fan shrouds. The fan setup is very clean. I did just bolt the shrouds together, but I mounted them to the bottom of the radiator with a 1" wide strip of aluminum bar. I didn't want the weight of the fan and shroud assembly relying on the plastic through-straps on the radiator core. Sounds like John and I had very similar ideas.
Unfortunately, I didn't have as much luck as John. He and I communicated last year, during the summer when I was fighting our cooling issues.
FF Dynamics did a commendable job of trying to help me with our cooling issue. Unfortunately, in Death Valley in the summer, we still hit 230+. I did take significant readings in a variety of conditions with a laser temperature sensor. Below 90 degrees ambient temperature, the Heep stayed at 210. Above 90, we couldn't keep it below 230. I have an AX-15, so trans temps were not an issue. The problem was load related.
My son spent a lot of time working on this in the summer of 2009, while he was in Death Valley. This included engine flushes, thermostat replacements, a second FF Dynamics radiator, new radiator cap, cylinder head rebuild, including hot tanking and magnafluxing, combustion leak testing, etc. The final resolution was to replace the electric fans with a factory mechanical, ZJ fan clutch and stock electric fan. I am still running the FF Dynamics radiator.
In talking at length with their lead tech, we came to the conclusion that I just wasn't getting enough CFM through the radiator. High temps and low humidity contributed to the problem. The CFM difference between the FF Dynamics fans (1100 CFM each) and the factory mechanical fan was significant. With the FF Dynamics fans, the hood vents had no discernible air coming out of them. With the stock fan, the air from the vents was significant. Yes, it is very loud, but I'd rather have loud than hot.
So, our temps aren't perfect at this point, but we're running. I didn't run this summer, so don't have additional detail from this year. I think next year I will be adding an oil cooler to provide a bit better margin of cooling.
The FF Dynamics radiator is very well put together, and I think would work well in most situations. The fan shrouds certainly help, as John mentions, in improving cooling. My temperature readings with and without the shrouds appeared to provide about 10% improvement, right up to the point of saturating the radiator with heat.
David Bricker / SYR
