Quote:
Originally Posted by Kodename47
As above, you design a manifold for the amount of exhaust gas flow. With forced induction there will be a greater volume of gas to get out the exhaust and thus the optimal design would take this into account. It is essentially what most aftermarket ones would do, hence they benefit N/A and FI but a design suited to a ~250bhp engine would not necessarily be optimal for one running +100bhp again. Is it likely to be a big gain, probably not but if you like to get every last bit of power then you could get one to fit your build.
|
Yes, I understand those fundamentals. I guess I'm just trying to understand what I would be leaving on the table by going with something like a Tomei/Gruppe-S UEL header that "isn't optimized for FI" vs something like an ACE CS400. I can't find any direct evidence that the CS400 has any specific optimizations for forced induction beyond the optimizations it has for NA applications. If the extra ~$850 for the ACE over the Grupee-S is buying me maybe 4-5 HP peak and a different exhaust note, then that helps me make my decision.
Perhaps I should provide some context: My car is bone stock aside from the Harrop SC kit (w/ 90mm pulley rather than the 95mm) and a Delicious F&G Ecutek tune. The next logical step seems to be a header so I'm weighing my options but can't find much in the way of real world comparisons between different headers in supercharged applications. I understand Harrop run the CS400 and recommend it, but that's quite vague. If something is "optimized" for a specific setup it would be nice to know HOW it is optimized.. what benefit does it provide over some, presumably, "less" optimized options.