Quote:
Originally Posted by Caravanshaka
you aren't separated by 8-10 HP once you factor in the high flow cat with the cat-back combo (which most people doing an exhaust will do both)...in fact Berk Dyno'd a gain of 32hp (19 from HFC's first, then another 13 adding exhaust) with their combo...
Like I said though, add a turbo and you may feel a difference from the straight shot compared to a couple extra bends. with both having Mandrel bent piping the gains aren't going to be significant even with a turbo. Maybe an extra 3-4 hp overall running 7 - 10 psi.
Forced induction will go well with any of the exhaust combo's out there, but if you are serious about boost you are going to want to increase the piping diameter, and you will likely follow the FI routing for a straighter shot. but that is going custom anyway.
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I understand why you might think they picked up 32 HP but that is not the correct way to look at it. Mods do not compound like that. You cannot dyno a car with one mod 8 months ago and say oh we picked up 19 hp and then dyno it now and say well, we picked up another 13 hp from the cat back so that must mean added together we make 32 hp. Just about every 370Z out there makes right around 280 at the wheels on a dynojet in correct 1:1 gear stock!
Now, if they indeed picked up 32 hp at the wheels show me the dyno where they made roughly 312! From what I have seen they have yet to break even 300 with the cats and the cat back combined. Look, we dynoed ours in almost 100 degree heat as well and we dynoed it stock and we dynoed it with just the cat back and so on and so forth in the same day in the same environment!
From doing extensive dyno testing with this car I highly doubt any set of high flow cats out there (including mine) will pick up anywhere near 19 hp with the stock cat back on the car. The stock cat back is so restrictive it will not allow it. If there was a BS flag I would raise it, but I cannot find one.
For the turbos, with the 7-10 PSI, my friend if I know anything it is turbos for a long time now and I strongly disagree with the statement that we may make 3-4 more horsepower with the less bends. You have to be kidding, right? Yes, the more boost you make the greater the gap will be but even at 7-10 PSI it will be significant! Come on, we make more than 3-4 more HP N/A!!!