Actually it's very important to know how much boost I'm putting into my engine, and if it is spiking, or dropping. And an aid to fuel ratio guage is important too, have you ever seen what happens when you go lean in a boosted engine? Temps rise and shit starts to melt. EGT is to measure the exhaust temperature of my 1st or 4th cylinder. Here is a scenario.
(It helps if you know how combustion works, and how a turbocharger works)
Say, I'm driving and I'm boosting at 15psi. Say the boost spikes to 22psi, now my car just can't compensate the fuel that would be needed to compensate for that much air, thus I go lean. My engine is now detonating before TDC, extreme pressure and force is put on the piston head, connecting rods, and crankshaft. (Sometimes Valves aswell) Also as a result of going lean my fuel is combusting at higher temps than it should be, and my engine literally starts to melt.
http://www.jagweb.com/aj6eng/failed_piston.jpg
My engine is very important to me, thus I have the tools to monitor it and keep it running smoothly. There is nothing rice about it, I don't add them to be Joe Cool, I add them to see what's happening to my engine. :cop:
ANOTHER THING, the 7 bolt engines if I recall correctly are weaker, they have a problem with the crankshaft "walking" into the crank case or crank angle sensor. It happens to all cars, but this engine model has seen it the worst, and thus most people try to opt for an older 6 bolt. It has less connecting bolts, but it is stronger, and slightly heavier.
And my engine is one of a 50-thousand. They can acheive the numbers on the stock block and internals. All you asked for me to show you, and I did. I have no intention of that level of modding to my vehicle. However, my engine with these few mods and bolt-ons will push 300awhp. Stock. You can go ahead and take a read around any forums or discussion board that these cars are talked on. They are known to go fast for cheap.
Oh, and my sources not only come from first hand, but from countless hours of research and reading. Might I reccommend you to a few:
dsmtuners.com
dsmtalk.com
Eitherway great arguement, and potential only increases with how much money you push into it. I'm not sure what the fastest 1/4 in a Mustang is with it's stock engine (block atleast :P) but John Shepard did like 7.something in his Talon.