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Jeep Wrangler YJ
YJ General Discussion
How can I get more power out of my 4 cylinder Jeep?
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<blockquote data-quote="machoheadgames" data-source="post: 428345" data-attributes="member: 18789"><p>505 Performance. I have pretty much only seen bad reviews from them. I'd engine swap before I'd install their stuff. </p><p></p><p>As for the electric fan....I and many others don't consider that to be a good idea. The aftermarket fans never provide anywhere close to the CFM volume of the stock mechanical fan...whether what they do provide is "good enough" or not, is debatable depending on climate. In Texas, that crap doesn't usually work. They also don't provide any extra HP unless they flow less. If they were to flow the same amount of air as stock, they would suck that same load out of the engine via the alternator. So the HP maybe gained is really just a result of flowing less air. The only benefit I could see would be maybe for water crossings which most folks don't ever do. On the highway, the clutch fan will even disengage a lot of the time as it can sometimes "feel" the cooler temps provided by the extra air on the highway and disengage to a point where it's not really sucking much power. </p><p></p><p>If I were to go with an electric fan it would be an OEM solution like from a Taurus. Even so, they will flow enough CFM that it takes a lot of power out of the engine electrically to provide that through the alternator. Then you're taxing the electrical system pretty hard as well. I'd rather have that load direct on the engine than through the stock 75A or 90A alternator. So at that point to me, it makes more sense to just keep it stock still.</p><p></p><p>Regearing deep for the tires is the much more reasonable solution overall, as well as expecting reasonable results from a 125 HP 4,000 lb box shaped vehicle.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 428345, member: 18789"] 505 Performance. I have pretty much only seen bad reviews from them. I'd engine swap before I'd install their stuff. As for the electric fan....I and many others don't consider that to be a good idea. The aftermarket fans never provide anywhere close to the CFM volume of the stock mechanical fan...whether what they do provide is "good enough" or not, is debatable depending on climate. In Texas, that crap doesn't usually work. They also don't provide any extra HP unless they flow less. If they were to flow the same amount of air as stock, they would suck that same load out of the engine via the alternator. So the HP maybe gained is really just a result of flowing less air. The only benefit I could see would be maybe for water crossings which most folks don't ever do. On the highway, the clutch fan will even disengage a lot of the time as it can sometimes "feel" the cooler temps provided by the extra air on the highway and disengage to a point where it's not really sucking much power. If I were to go with an electric fan it would be an OEM solution like from a Taurus. Even so, they will flow enough CFM that it takes a lot of power out of the engine electrically to provide that through the alternator. Then you're taxing the electrical system pretty hard as well. I'd rather have that load direct on the engine than through the stock 75A or 90A alternator. So at that point to me, it makes more sense to just keep it stock still. Regearing deep for the tires is the much more reasonable solution overall, as well as expecting reasonable results from a 125 HP 4,000 lb box shaped vehicle. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
How can I get more power out of my 4 cylinder Jeep?
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