Quote:
Originally Posted by Johnny Danger
Have you ever tried going completely catless ? I have. There was a significant loss of low end power, not to mention CEL"s galore, along with the fact that the vehicle would not pass emissions/inspection testing.. I've spent considerable time (and money) over the years experimenting and testing various exhaust configurations for the 986 boxster. And, I can assure you that there is no easy or inexpensive way to improve upon and gain power over the oem system . I suggest that you gather some actual experience on the topic before making any more sweeping assumptions
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Easy Danger, I made no sweeping assumptions other than the factory header/cat arrangement is sub-optimal. When you were running with out cats, did you have the ECU reflashed to match your new exhaust set up? Certainly opening the exhaust may cost some low end power, but that would depend on the diameter of the pipes, not the the cats.
Are you of the opinion that the back pressure from your cats is "enhancing" torque/power at lower RPM?
I think an easy way to gain a few pony's is to leave the stock headers in place and remove the secondaries. $250 buys a 2-3% hp increase on an S plus a loss of ~35lbs. If you then opened the intake with a better set up, reflashed the ECU and added an underdrive pulley. I think you'd get gains that you could feel for about $1200-1500. Earth shattering? No. However, if properly fettled, there is no reason why the 3.2 can not make around the same BHP/liter as the 3.4 996.