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Discussion Starter #1 (Edited)
quick question on turbo sizing for you guys. a buddy runs a to4e with a ar81 on his 4.6l (rear mount kit). i know thats really small but so far so good. hp goal is low about 400rwhp its making 375rwhp and 450rwtq right now but still really rich. anyways, he says it makes full boost at 3200. i know the 63 will spool faster but how much faster and will it be too small for 4.6l being pumped through it? running 8psi if that matters
 

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I would say lean it out and get it tuned right to where you want it before you go looking to switch to a 63 ar, im not sure how much that will do to the spool time (someone can chime it with that) Once you get it tuned right it might be what he wants. The 63 def will spool faster but depending on what he wants it might choke it a bit up top. If its too rich there should be some more power there. enough to get to 400?
 
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