99cx wrote:i disagree. i got my P28 "Custom" tuned and i think its an amazing difference.
its great management for a turbo system
you can do custom Vtec engagement
change speed limiter and redline
create a two step launch control
using Uberdata or Crome software
tuning programs like Neptune, Ectune, and Hondata.
What's a "custom" tune? Did you get your car dyno-tuned or is this one of those "I can't believe it's not butter" deals?
Did you do a baseline dyno before the chip and then another to see the difference? Because there's an article online where they tested 4-5 chips and they lost power on every single one.
As far as "I felt an amazing difference"... I worked at an exhaust shop for a short time. I can't tell you how many times a customer came in with a hole in their exhaust, bad manifold gasket, or bad muffler that made their car loud and they said "it feels like it makes more power".
I also worked for a short time at a dyno shop. I've seen throttle body spacers, oversized and unjustified injectors, oversized throttle bodies, port and polish jobs, even air intake pipes that all lost power from stock. My coworker loved to put his AEM in place of the customers Hondata or hacked ECU and within a few minutes he can get their car making more power, running and idling better. The big thing is that the power output from one dyno pull to the next would be consistent. With OEM ECU based tuning, the ignition timing would wander from one pull to the next resulting in a change in power with no change made to the tune.
He also has a box of discarded VAFC and similar devices but you don't see as much of that as you used to.
You can't reliably judge a small to modest power increase. We're not sensitive enough. And besides that our psychology is such that if you expect an increase, you will perceive an increase.
The dyno settles all doubt.
Posted: Wed Mar 31, 2010 9:02 pm