"The shroud needs to have reliefs in it to allow air to flow through the radiator. At speed, the fan itself may be acting as a restriction as a result."
I am thinking this as well. My 66 had an aftermarket shroud and dual electric fan and similar to yours would run hot at highway speeds but fine at idle and cruising around. On that car I went to a factory 7 blade clutch fan and all was fine.
My current setup uses a Lincoln Mark8 electric fan, which pulls a ton of air and has no issues at any road speed.
Sent from my SM-G965U using Tapatalk
__________________
68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight
|