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Re: I also would like to know where you get your info f
Posted by Chad [Email] (more from Chad) on Mon, 25 Jul 2005 07:23:21
In Reply to: Re: I also would like to know where you get your info f, peterson, Thu, 21 Jul 2005 23:31:06
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In some cases a header can allow for higher hp, but will sacrifice some midrange and add a bit of lag. The decision to use a header or not can be based on the desire to shape a power curve a particular way. You have to know the specific goals of the engineers before you can cite their example. Its reasonable that they found a flexable power band with the stock header and decided that was better for rallying, whereas the ultimate gain in top end hp would be better for a pure track car.
On my 9-2x I removed the pre turbo cat, but after much deliberation decdided not to go with a header system. The general consensus is that a a good header can yeild 10-15 more hp on a stock turbo, but will take the turbo the another 2-300 rpm to spool (9-2x have a very large headers due to the boxer engine design) to me the car lacks midrange punch the most, so delaying boost onset was not an acceptable trade off for the extra top end hp.
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