The car took 12 mintues to warm up as opposed to 6-7 minutes without the block. Temp stayed in the same 183-188F range throughout. No clue why. Ambient temp was 41F.
Have you guys had to make a vented block for summer or are yours 'as is' all year?
Coast distance is much better as well. I have two good reference points for coasting, one down and back up hill, and another just uphill.
The first one from 50 mph will barely get me to the 4-way stop sign. With the grill block I had 20 mph in hand. It gained speed on the downhill which gave me another 6 mph. It never did this before.
The other coast point would have me turning onto my street at 15 mph and with the block it netted 24 mph.