Quote:
Originally posted by Ralph Greene
My A/F are in the 12.5 to 13-1 WOT range all the way.
I think you guys are making way to much over any potential low RPM power loss from bigger pipes. Even if it's there, and on my car I don't think it is, it's not very diffucult to be in the power range when necessary.
I also don't think there is anything wrong with just adding aftermarket H or X of choice, and weld in some straight thru muffs. I think you make about same HP a little quieter....and maybe a little lower in RPM curve.
You can't feel 10 HP on the street one way or another, and 5-10 HP doesn't make a performance difference on the street either. No matter what the butt o meter says.
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lol on the butt o meter part.
I don't disagree with you either. After 2200rmp my A/F was a flat 12.5 with one short dip to 11.9 so I think the tune is probably ok. Would like to see a flat 13.0, but that might be difficult to get.
I understand about getting into the power band. I went up against a C5 on the expressway and found out in a hurry about what gear to downshift to at 70mph with the new cat back. Going to 4th was a joke. The C5 showed me his tailend. Going to 3rd at 70mph got me above 4K and I could stay with the C5 and even pulled him a bit.
On the dyno we tested the shift level. Shifting at 6K the rpms stayed at or above 4400rmp so we were in the power band. I will learn to live there if I can not get back the lower end rpm. I may just go to the MRT cated H-pipe.
