Fast Intentions exhaust and header comparison. Before and after UPRev tune (Dyno)

F.I. Inc. · 03-24-2010, 01:05 PM

Quote:

Originally Posted by semtex

Not trying to rain on the parade here, but I have to say that I find the absence of any comment on the impact of these headers on low-end torque and power somewhat conspicuous. What happened on the low end? Please tell me that the gains in the midrange didn't come at a huge expense on the low end. *keeping fingers crossed*

On the contrary, we actually picked up torque and power throughout! At the highest gap for a torque increase it was at 4300 RPM's. We had an increase of 18 FT LBS. A far as power, the highest gap increase was at 4300 as well as 5900 RPM's. That increase was around 15-16 RWH. This is just a tid bit, I promise I will post the dynos soon. As far as the tune, what we were mainly able to do is clean the A/F up which made the car safe. The timing we demanded was kicked back by the ECU and I feel higher octane fuel than our California 91 garbage will help the car perform better!

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