Bigger is better but I just have a 30k with a 10 inch fan mounted to it. That would be plenty. I got a deeper derale pan with the cooling fins and I dont hardly use my fan anymore.Originally Posted by zts gixx
So the final questions is....do I need a 40k or just go with a smaller one like a 28k?
2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s 
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