SIMPLE GREEN .....
Spray it on and let it sit for about 10-15 minutes. There is no need to heat up the engine first. Do not use a high pressure hose and watch out for electrical connectors. Then use compressed air to dry the engine compartment. If your engine bay is really nasty, you may have to use two applications. You can also use a cheap painting brush with simple Green to loosen up the stubborn crud.
Note:This might be a good time to use Dielectric grease (lightly) on all electrical harness connectors, including the spark plug boot connectors. Use electronics sponge Q-Tips to apply the grease.
Then for shows use Meguire's #40 Rubber and Vinyle Protector to give everything a shine that is not as staticy as using Armoral. IMO, Armoral is crap. You can also go over the engine bay with a water wash after you spray it with #40 so that there isn't too much residue ... then blow dry.
I clean the engine bays on my vehicles all the time with Simple Green and have never had a problem. IMHO, it's the BEST ... and it is cheap.
