Quote:
Originally Posted by thx712517
Would this have a desirable impact on drag by partially blocking air entering the engine bay, or would this create more drag?
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Grill blocks are generally acknowledged to help. It can reduce warm-up times and drag. Generally the more flush with the bumper, the more people think it helps aerodynamics. The reason is that the goal it to get air moving around the car as efficiently as possible. Use the forum search function for foam pipe insulation grill block. You'll find good temporary possibilities. BTW, there is no good reason to continue running the tires under-inflated. The ride is more comfortable at 40psi, but you are trading FE for it. There is no safety difference. You would benefit from going to the full sidewall pressure (at least).
Do you have an aftermarket gauge, like and UltraGauge or a ScanGauge?