Thanks for the answer.seems this cars ground is the chassis, as in instead of running a ground wire to a main ground harness that goes to the chassis, it relies on the chassis to be the ground harness. So if the electrical component needs a ground it goes through the component housing to the chassis. Disconnecting the battery kills the power and the component doesnt need that ground which was "removed" when disconnecting the part....O2 sensor may be grounded through the exhaust piping to the engine to the chassis. So disconnecting the battery may eliminate the posibility of getting a CEL for this reason. I could and probably am completely wrong but some of this assumption is from issues from people putting in a CAI without disconnecting the battery and unplugging the MAF and then when its all put together they get a CEL. Disconnect the battery and then no CEL.
I am probably way off but better safe then sorry.
Effort no, money probably not, but I have wasted money on dumber things and I like to make my vehicles "custom"^ yes....... was it worth the money and effort???
I have the 6mt and this is my first performance mod. I have done cat back exhaust and intakes on my other vehicles and I have noticed the increase throttle response then but as you said my stock exhaust is a bottleneck. I plan on doing an intake and axle back exhaust on this car down the road and I do think that all of these things together will really make a difference.do you have a 6MT or an AT? the HKS products i have dont dyno much but i feel a difference in response from the throttle. Have you noticed anything like that?
Also, a mod like this gets better with supporting items. If your exhaust bottleneks it again you dont realize the true gains. Ill see what happens when i get mine on. Thanks for the mini-review. Let us know if anything changes after the ECU has some time to adjust to it.
By itself, the downpipe will not appear to be effective...but as others have said, with supporting mods (freer flowing exhaust, intake, tune, throttle body, etc.) the mod will be worth it.Doesn't sound like its really worth it then is it
5hp and 10 on the torque side advertised. On the CR-Z, that should make a difference and one that should noticeable...By itself, the downpipe will not appear to be effective...but as others have said, with supporting mods (freer flowing exhaust, intake, tune, throttle body, etc.) the mod will be worth it.
You cannot look at modifications (especially breathing mods) as standalone improvements, it is important to think in related systems of improvement.