Sources: General Motors , 
quote: They also experience lower temps, and less back pressure , .......and are relatively low boost.
quote: I guess I could have been more clear. A typical diesel exhaust temps (500-800) compared to gas 1k-1.4k.
quote: A typical diesel exhaust temps
quote: When you say 26+lbs are you talking about inches of manifold pressure?
quote: Oh and Spuke......Those powder forged rods(PFR) that Ford uses were one of the first things to go. Went with machined titanium. Too many of my friends cracked/broke/bent those PFR when they went over about 450+HP.
quote: direct injection (which provides cylinder cooling...it's why compression ratios are higher nowadays)
quote: Compression ratios are higher with direct injection not specifically due to cylinder cooling.