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Appreciate that Metro. I do understand one blocks the air entering through the grille. The other blocks the front of the radiator itself.
I used a piece of a for sale sign for the radiator block, slipped it between the AC condenser and the radiator.
The photo shows the lower grille block. Grille blocks offer the potential for aero improvements, while radiator blocks do not.
Maybe I was not clear enough in my previous post, and I appreciate any clarification that would prevent potential confusion.
In the Insight Central Forum there is a post about one member who saw a 10 MPG improvement using a radiator block, but (as I posted before) care should be exercised to not block the flow of air when the cooling fan is on, or you could overheat the engine and possibly do some serious damage.
I avoid cardboard for rad blocks, mine got wet, and I was worried about it disintegrating and making removal much more difficult. You do need to be careful to not bend the fins on the radiator which could also affect cooling capacity if the damage was bad enough.
regards
Mech
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