I really hate posts like this. They are extremely misleading to those who may not know better. I don't know if 1.you dyno anything personally, or 2.you tune anything personally, but I constantly question that when I read your responses. For the first bolded statement what exactly are you telling us? No seat of the pants? No dyno hp? No throttle response improvement? You've made a bold and broad statement that you should back up with some creditable facts or a definitive opinion. For the second part, again what is it you are really trying to say? The computer has a greater then 20%=/- fuel trim available for it to use. Of course a tune isn't "needed" in that respect because its a learning computer. It saves "trends" i.e. vehicle/weather changes into its long term trim memory and it becomes the new baseline. However, the truth is the VE is carefully calculated using stock equipment so once you deviate vehicle hardware the computer is somewhat incorrectly calculating, but not enough to cause an issue with only cold air tube and muffler swap.
---------- Post added at 05:12 PM ---------- Previous post was at 05:08 PM ----------
Knowledge is power my man! But be careful with that.....YOUR knowledge is in YOUR hands. Some lonely soles such as myself can be researched if you try hard enough (typing a name into google for instance) and seek no profit from making YOU smarter. Think on that for a bit!
Happy to further discuss, but most people do not want the nitty gritty details. Not sure what it is that you are wanting from me...dyno charts, how tuning is done? Fuel trims are an irrelevant factor to be honest, as it is the cause of the fuel trim change that is more relevant. Some causes of a fuel trim change result in ignition timing changes in the ECM calculation, some don't. Those that DO are significant enough to warrant a tune change.
Not here to make an argument, just stating the facts on my end. As far as making money, BBP sells all major performance parts (including intakes and exhausts). It would benefit BBP more by saying that an exhaust makes a huge difference, as they are much more expensive than the intake we typically recommend. But instead we tell our customers that an exhaust change really is more for looks/sound than anything else.
I can say for a fact, that neither the Corsa nor the Magnaflow added significant HP increase to my 04 Tahoe, less than an intake. I did add an AEM on there, but that was minimal HP increase as well. The most amount of increase I had was from the cam/LTs, and eventually a Maggie.
Bottom line though, the factory exhaust flows plenty well, well enough for the vehicle's needs. If anything, the real gains can be had by swapping out the factory Y pipe. Magnaflow makes a pretty decent bolt on replacement. Even better, go for headers...
