Quote:
Originally Posted by LesBaer
All of those extra coolers on the ZL1 add weight but are needed for the LT4 supercharger to control heat soak. There's about a 240lbs difference between a stock ZL1 and a 2SS but I don't know exactly which parts contribute how much to the difference.
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There's certainly nothing wrong with doing an LT1 build. It really just depends on your goals. Just be mindful that the high pressure fuel system on the LT1 does start tapping out at about 600 WHP. (That's why you see people using the underdrive pulley when putting an LT4 supercharger on the LT1.)
On the ZL1, almost all of the weight difference is in the heavier differential, axles, sway bars, and added supercharger. There is only one added heat exchanger for the supercharger and it weighs next to nothing. I've never seen an official list of the 11 exchangers GM references, but in the front of the car, the 2SS has all of the same exchangers except the one for the supercharger.
It's certainly not accurate to imply the LT4 has a weight disadvantage. I would think an LT1 with an aftermarket supercharger probably weighs a touch more than an LT4, but the weight difference is almost certainly negligible.