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Showing results for tags 'lsx swap'.
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I have seen several videos and posts across the forums recently about these LS engine swaps for 996 911's. I keep hearing that the LSX (LS2/LS3) is LIGHTER than the M96. You know who keeps saying this. It's all over youtube and other forums. But my research has determined this is false. The M96 (3.4 and 3.6), with all accessories, and including the entire exhaust system (yes, cats too), is roughly 440 pounds, +/- 5 pounds. Subtract the weight of the exhaust system (and all LS swaps argue they use the factory Porsche exhaust system), and we arrive at a number much closer to 410-420 for the M96 engine minus exhaust. This is assuming roughly 20-30 pounds for the OEM exhaust, which I have not been able an accurate separate weight (feel free to add this if you know it). However, the LS3 (all aluminum, 6.2, GM crate motor) weighs 465 pounds with ZERO accessories (not even the pulleys, brackets, or belt tensioner), and NO HEADERS (much less an entire exhaust system). Including accessories (PS pump, Alternator, Water Pump, but still no AC compressor), and headers, the engine assembly weighs about 500 pounds, not including the mounts. As a data point, the ultra lightweight LS7 motor weighs 454 pounds completely naked. So, a 996 with the M96 3.4/3.6 is going to be at least 80 pounds lighter than a 996 with an LS motor installed (possibly closer to 100 pounds lighter). Assuming one would pay the $22K+ for an LS7, and assuming that would fit and be compatible, the weight difference would drop to "only" 50-60 pounds. As soon as we start talking about CG height, polar moment, etc.... things get even worse for the LS Swap. Not to mention it putting extra strain on the transmission mount. I hope this sheds some light on the subject and puts to rest some of the absurd claims I see being made about LS Swaps. I got tired of hearing the ridiculous claims. Long live the M96!!!!!!