Yeah, heatsoak while moving. It's simply the denser air to begin with. Please keep your misinformation to yourself.
Exactly. Cold air=dense air=more power. I've owned quite a few turbo cars over the years, mostly several hot modded Saab and Volvos. Same thing with them. It doesn't matter how big the intercooler is, or whether you put in bigger dp/rp and go catless, etc., the thing is just going to produce more power across the entire power band in temps below 55 degrees.
Second point: There's plenty of objective dyno data here with all kinds of differing mods to point out that, yeah, you can swing that tachometer up to 6700 rpm easily - stock or modded. The mods will fatten the power curve and increase its average and maximum hp and torque. But the power curve, regardless of those mods, still falls like a rock after about 5500 or a bit more because of the small size of the turbo.
Short shifting to a higher gear at between 5500 and 6000 is going to produce better acceleration times with our small turbo. The short shift causes the rpm's to fall back into the fat part of the power curve where there is more power being produced, then building back up to the peak in the higher gear. This is better than staying on the throttle to redline in the lower gear. Time slips on short-shifted quarter mile runs and dyno's confirm this.
So, sorry about calling BS on the butt dyno, but the mods discussed in this thread (except removing the IC cover) may fatten up the power curve, may increase the height of the power curve, and improve performance, but they will not move the curve further to the right on the dyno.
About the IC cover. It seems to me that would break the seal between the hood and the IC and actually reduce the amount of cool air getting to the IC. Maybe I'm wrong, but I would think it would be better to keep the IC hood scoop sealed.
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