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<blockquote data-quote="Speeds8erM-1" data-source="post: 4906338" data-attributes="member: 26172"><p>EFI 5.0 started in 86. 86-mid 92 were TRW Forged Pistons, late 92-93 as well as 94-95 Mustangs had hyperutectic pistons. Doesnt matter, block will generally split before the hyper pistons will if the tune is on. If the tune is off, the hyperutectic pistons are more likely to melt than the forged but if you are anywhere near 500 rwhp or so and you run into detonation the block is gonna go anyway. </p><p></p><p>Guy on Turbomustangs had a hyperutectic piston engine that split at 620 rwhp or, pistons came out FINE, the tune was on, the block is just weak. </p><p></p><p>86-88 is Speed Density (California 88's were MAF though), they tend to run faster stock for stock but do not take well to camshafts and such although some people have tuned around it.</p></blockquote><p></p>
[QUOTE="Speeds8erM-1, post: 4906338, member: 26172"] EFI 5.0 started in 86. 86-mid 92 were TRW Forged Pistons, late 92-93 as well as 94-95 Mustangs had hyperutectic pistons. Doesnt matter, block will generally split before the hyper pistons will if the tune is on. If the tune is off, the hyperutectic pistons are more likely to melt than the forged but if you are anywhere near 500 rwhp or so and you run into detonation the block is gonna go anyway. Guy on Turbomustangs had a hyperutectic piston engine that split at 620 rwhp or, pistons came out FINE, the tune was on, the block is just weak. 86-88 is Speed Density (California 88's were MAF though), they tend to run faster stock for stock but do not take well to camshafts and such although some people have tuned around it. [/QUOTE]
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