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Lightning Forums
Harley-Davidson™ F-150
How to make it faster?
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<blockquote data-quote="BLWN DSG" data-source="post: 8880281" data-attributes="member: 32877"><p>actually no it is not. Due to the upper pulley size in diameter and the resulting spinning ratio of the blower it is about 1.5-2 #'s different. I dont know the exact math or resulting blower rpms but I do not that it has been covered many times in the Gen II section about that. A 4# lower on a Lightning will give you roughly 12# total. A 6# lower on a HD will put you 10-11#. </p><p></p><p>Don't worry about changing the upper pulley. I changed mine to a stock Lightning pulley and have never once had belt slip. I bought the 90mm idler brackets from LFP and never thought twice about it. </p><p></p><p>Yes it could handle nitrous but I would do a wet shot! I would not do anything more than a 50 or 75 shot if you are going to do a pulley swap and tune. 14-15#'s of boost is were you are flirting with creating a window in your block....that is around the 450rwhp range....all depending on how good your tuner is.</p></blockquote><p></p>
[QUOTE="BLWN DSG, post: 8880281, member: 32877"] actually no it is not. Due to the upper pulley size in diameter and the resulting spinning ratio of the blower it is about 1.5-2 #'s different. I dont know the exact math or resulting blower rpms but I do not that it has been covered many times in the Gen II section about that. A 4# lower on a Lightning will give you roughly 12# total. A 6# lower on a HD will put you 10-11#. Don't worry about changing the upper pulley. I changed mine to a stock Lightning pulley and have never once had belt slip. I bought the 90mm idler brackets from LFP and never thought twice about it. Yes it could handle nitrous but I would do a wet shot! I would not do anything more than a 50 or 75 shot if you are going to do a pulley swap and tune. 14-15#'s of boost is were you are flirting with creating a window in your block....that is around the 450rwhp range....all depending on how good your tuner is. [/QUOTE]
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Harley-Davidson™ F-150
How to make it faster?
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