Quote:
Originally Posted by aerohead
At Bonneville I blocked the trash can lid opening down to 40 square inches for the last couple of runs.The 150 bhp engine was capable of 124 bhp at the track and at WOT for a mile the temp gauge never really moved.
I left the block in place and drove on to Carson City, Nevada and then back home here to the Dallas/Ft.Worth area and never had a cooling problem.
On one 10,600 pass in Colorado I did run the heater to full heat and max blower setting to augment the cooling system.
The block is still in place today and I've had no trouble in daily commuting or 70 mph travel.
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It's 10-20F here this week and my temp gauge barely gets going with a full grille block and a block heater over my 10 mile commute with defroster half on. I've also seen the heater core provide most of the engine cooling under heavy climbing loads, but that isn't an option I would exercise in hot weather. I think my calc is mostly useful for summertime pass climbing at this point... If you want to set a fixed inlet size and leave it alone forever, I think it's a good guideline. ...EDIT... except actually I think my numbers might still be a bit high. I'm sure if I keep refining it I'll get closer.