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#40 |
Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,221
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Re: SkinnyG's '61 Apache
COOLING ISSUES
On the highway, it's fine, but in traffic, in the summer, at 38°C, with the AC on, it's not. Could be because I have an intercooler in front of a transmission cooler in front of an A/C condenser AND P/S cooler all in front of the radiator. Nah. The rad core is 22x19" in size and rated for 700hp. I have one $100 17" American Volt electric fan, zip-tied directly to the radiator. This cools ONLY a 17" circle minus the hub of the fan area, inadequate when standing still. The fan is rated at 130W, which should pull about 11Amps of current. I ordered a $360 "Be Cool" 16" fan that is actually make by Spal, which draws 26Amps. Excitingly, the blade and hub protrude past the mount, necessitating a raised mounting. If I'm going to raise it at all, I'm going to build a shroud. A shroud should encompass the entire core so the fan can draw air past the entire core. Which I fabricated. On the other hand, fully shrouding a rad reduces the amount of air that can pass through the rad at speed. To fix this, I made nine 2"x4" rubber flappers from a commercial truck tube, which "flap via three (each) 3/16" pop rivets pulled NOT tight, so they can move. These each cover a pair of 1-5/8" holes in the shroud. In theory, when the fan is pulling, these flaps are sucked closed, and when the car is at speed, air pressure forces the flaps open. ![]() ![]() ![]() ![]() And boy does the completed unit almost fit for reassembly. The result? So far, seems good after the first short outing....
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, boosted-LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate Last edited by SkinnyG; 07-14-2024 at 10:41 PM. |
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