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so was there a consensus in this thread?
Personally I think a roots/twin screw definately has potential and would help with the lack of torque on these tiny motors. There is something to be said on having instant tq just above idle to redline. These types of blowers even with liquid to air charge coolers have to fight heat soak, you will need to run meth or secondary injectors to really make power. The centri blowers are definately a viable option but do have the downside of make power progressively and not reaching full boost until redline. The idea that you could bleed off boost to keep peak tq down low all the way to redline sounds good in theory but your IAT's will be through the roof. I am leaning towards the vortech setup as there is more support, documentation, and they are stateside. I really think either of these setups come down to how you like you power delivery and what option fits your goals.
Now if you are talking about really making power then I think both of these setups will fall short. They will not be able to make 400-500 whp while staying in the ideal compressor range, you may be able to get by running a shit ton of meth, e85 or c16, maybe nitrous, but in the end you will need a bigger compressor. In the LS world the roots style blowers are usually good up to about 600-800 range after that people either do some crazy blower fab work, go with a large centri blower, or go turbo with a 100mm compressor.
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