Quote:
Originally Posted by Sh0velMan
I'm really not trying to be a ****, but gaining 13whp from ditching the stock headers and cats for Longtubes is really not that impressive. Plenty of folks get that from test pipes. (Not to mention the 20 degree difference, which absolutely matters. WC or not, you will make more power when it's cooler.)
Also, there's nothing about that data that indicates your resonators had anything to do with the gains at all. I would venture a guess that the cats (and temperature) is the main thing that netted you that gain, given that the gains are uniform throughout the power band.
Anyway, glad you like it, that's all that really matters anyway.
Also, that's not really rich... most guys find maximum N/A power between 12.5 and 12.8. Before my tune, I was pegged at 10.5, now THAT was rich.
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13 was peak. Mid range is much more impressive and important for the almost 20 it gained! And since its untuned the full gains can't be seen since its so rich. The stock map can't do everything.
You're 100% wrong about the temp. The SAE correction targets 75 degrees for both. So if both would have been run at 75* that's the power you'd see. If you want uncorrected, fine, I'll get it showing you what 20* really does.
Since another 370 dyno'd at 91* with TS I'm going to again say you're wrong. He only put down 280 which was the same as me with cats. Guess what?? He's raspy as hell.
The sniffer in the tall pipe is 1.0 AFR off. The cars wide bands were much richer from the logs.