additional cooling to accommodate full grill blocks

[aerohead]

My immediate thought is that you're under-cooling.I don't believe the fan should ever come on above 40-mph.The ram air should take care of everything.If you do the bellypan later,that could conceivably lower your drag another 12% and she should run even cooler.Make sure that your ductwork between the reduced opening and radiator is air-tight otherwise the stagnation pressure will bleed away,compromising the cooling.If you have to,open some of the block.Driving is stressful enough without having to worry about over-heating.-------- Later on,when you've done other mods,you can close it back as your load will be reduced.-------- As to the GM chin spoiler,any of the "bottom-breathers" will have that to look at.Corvette,Trans Am Firebird,and some Camaros from mid-1990s on.

[micondie]

If you want airflow ideas look at a late model Trans Am. My 93 has no grille opening at all and gets all it's air from below the nose.

[theunchosen]

Added oil coolers to trans and engine. Trans was simple just threaded into fill and drain bolts, oil pan was more difficult. Had to reroute line to secondary pump then to radiator then back to primary pump.

Drove through Sotuh Carolina(so it was kind of imperative that i finish this project.

Outside air temps were over 100 for the better part of an hour and a half on the highway. Temps ranged from 100 in Spartanburg to 105 near Augusta.

Engine bay temps were about 5 degrees above ambient(Wearing the wider than stock front bumper for summer). Engine temps, AIT, and coolant temps were all much cooler than normal. In Tn I run about 185 on a warm day(70-80) on this trip Michelle stayed sub 200 the entire trip, no fan cut on after running down the highway at 3K rpm for an hour and then stopping at a red light. Temp did surge to 205 while stopped but the thermostat now just runs all the pumps faster instead of cutting on the fan.(No radiator fan as its effect on passive highway cooling is detrimental and in TN I highly doubt I'll ever see a day hot enough that city traffic will get me to 210).