So I finally added AAM resonated test pipes to the car. I had the car dyno tested after install to determine any power gains. It was a little warmer and more humid today than the last time I had a dyno done, so it may not reflect as well as it could. I asked for a before and after, but yeah... I don't have the DRF's available for this run yet. I'm going back to the shop tomorrow morning because some *** hat didn't tighten the bolts on my H-pipe and now I have a gasket hanging where it connects to my midpipe. The car doesn't sound all that great atm. I'll wait till it's fixed and broken in over the next week or two before I pass judgement. Currently, it sounds like ****. It's like the car developed a sore throat. Anyhow... As far as improvements go. The only dyno plot I have is in STD. I cross referenced it with the best run I had with my last pulls. The results are:
315.68WHP 258.12lbft TQ in STD with 0 smoothing.
My last pull in December was:
314.17WHP 255.34lbft TQ in STD with 0 smoothing.
This is still untuned. AFR's start out a bit lean and then settle into about 12 after 6krpm. The dyno plot looks remarkably smooth for 0 smoothing and being untuned.
So again, minimal gains are showing. I'll know for sure once I can dig a little deeper and get a better idea of what the CF was and the conditions. In SAE, I'm guesstimating about 308-309WHP and 256lbft TQ. I have no clue why I'm not getting the power improvements some other guys get with the same type of mods. I'm not saying my power is bad, it's not that at all, but I was expecting more than a 4-5WHP improvement from just short tails to mid pipes, test pipes, and intakes. Have at it, I'm at a bit of a loss lol.