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Message: <blockquote data-quote="shiroitenshi" data-source="post: 1351286" data-attributes="member: 27518">Got a question here too, with regards to your question.If you get 2-5 peak power gain, isn't that gain distributed across the graph as well? Of course, it's a meager overall gain, but more power = more money, isn't it?As far as I know, I've never seen a dyno chart that spikes vertically for a 2-5hp gain for just the peak hp, with no additional power anywhere else. It's usually gradual and power distributed across the chart to result in the peak hp. The only difference is the shape of the graph, which will usually show how the extra power is distributed, whether in lower, middle, or higher rpms.usually 2-5 horsepower peak power gain is really good (for me lah!), considering our small displacement engines and it's natural aspirated state, and getting more power out of it is really just an issue of how efficient you can make your engine. There's a lot of junk products out there that claim this and that, and yet when you use it, it fails to deliver more power, with some even worse performing than the stock part that came with the engine! So if there really is an increase, however meager, you should be thankful that it was money well spent.Anyway, it's really expensive to make power out of an NA engine once you hit the displacement/efficiency limit, as you have to contend with other methods or theories that can push NA engines further. (lightweight conrods and crankshaft, higher compression pistons, balancing, using electric water pump, porting work, etc.) All the ones I mentioned cost quite a lot, and likely not for the casual enthusiasts.Turbo cars are another story, since they can push more air in regadless of engine capacity (provided the engine can stand the boost)  FC when daily driving, as this is dependent on other external factors like wheel size, transmission loss, vehicle weight, engine design/weight etc.) AFAIK, it's something to do the extra fuel needed to cool the intake charge from the turbine, but I'm not knowledgable enough to say for sure.Just my 2 cents.</blockquote>

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