This was one of the warmest summers on record and this new cooling system works like its name "a champion" THE 400 SBC ran cooler than it ever did with the old Walker. I mainatined 180 degree operating temp and in traffic the fan came on at 205 and cooled the motor immediately. Next project is to remove the mono spring and install front coil overs! Someday a 406 with a 6-71.........
The Champion radiator measured 17" by 17" within the cores. Jegs sells a 2800 cfm fan with shroud for a 79-93 5.0L (555-52135) that fits this radiator perfectly. The jegs fan controls were removed in order to mount this fan but DERALE adjustable electric fan controller part # 16759 was the perfect control for this application. All the electronics fit inside the cars body, and the temperature probe can be extended to any length. The hardware that comes with this fan was used to make feet that simply sit atop of two opposing pieces of aluminum angle (like a "T") so no weight is on the radiator. Note that black car door trim was used a rubber bumper between the aluminum angle and the fan's feet. One, 1/4 " bolt on the top holds this shroud assembly in place. No holes or brackets in the radiator! I've run the engine at full temperature during idle speeds and it cools great. A heavy foot road test on a 90 degree day will be the final test. I am waiting for warmer weather!!!
The grill is made out of stainless 3/8 tubing and 3/4 angle. Tack welded with my mig, stainless wire .024, and helium/argon/co2, tri gas. The bottom 3/4 angle is mounted so no weight is placed on the radiator, but it uses the car frame radiator mounts, so it can move with the radiator (on top of the rubber pad). The top of the grill 3/4 angle was made and includes bent tabs, the stainless tabs uses flat aluminum extensions that are attached to the radiator's aluminum mounting tabs (1/4 20 bolts and lock nuts). Neither the top or bottom of the grill touches the radiator, and maintains an 1/8 clearance. Silicone Rescue Tape is wrapped around the grill ears (or anywhere the shroud may touch the grill) so the shroud can touch the tape/grill but there will be no vibration with this high temp buffer. Add a bit of Wild Strawberry paint to the shroud and it's a match! Next a cooling fan!
The first question to ponder was maintaining cooling with a 400ci sbc. The current radiator assembly is just too tall. Lowering it would interfere with the center-link steering. But I needed it lowered 2"-3". So it's out with the old Walker, and in with a new Champion 3, 3/4" core 3" lowered radiator. Once I cut the existing shroud, we needed a new custom grill and a electric fan that would pull the cfm's needed.