wstar's Journal

370Z JT · 04-30-2011, 07:36 PM

Wow. Can't wait to get the manifold. Looks like +16 hp and trq gains in some areas. Quite impressive. This is with a canned tune to boot.

wstar · 04-30-2011, 09:04 PM

Quote:

Originally Posted by 370Z JT

Wow. Can't wait to get the manifold. Looks like +16 hp and trq gains in some areas. Quite impressive. This is with a canned tune to boot.

It's with no tune, those graphs are running the stock map.

wstar · 05-01-2011, 07:30 AM

This morning I was thinking more about the relative weather issue on these two widely-spaced dyno runs, when I remembered that there's online almanac data. I looked up the pressure and humidity in Houston for the first dyno date and yesterday, combined that with the temperature data from the dyno's logs, and plugged the full set of values into the SAE calculator HERE, and it came up with a dyno correction factor of 0.995 for my old run and 1.050 for the new run.

Assuming the almanac data is decent information source for these purposes, those correction factors put the numbers at SAE-corrected 298.7 and 294, respectively, rather than 300.2 and 280. So really I'm betting most of the difference was the weather. 4.7hp could be anything, likely the dirty filters

04-30-2011, 07:36 PM	#1 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 380	Wow. Can't wait to get the manifold. Looks like +16 hp and trq gains in some areas. Quite impressive. This is with a canned tune to boot. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

05-01-2011, 07:30 AM	#3 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	This morning I was thinking more about the relative weather issue on these two widely-spaced dyno runs, when I remembered that there's online almanac data. I looked up the pressure and humidity in Houston for the first dyno date and yesterday, combined that with the temperature data from the dyno's logs, and plugged the full set of values into the SAE calculator HERE, and it came up with a dyno correction factor of 0.995 for my old run and 1.050 for the new run. Assuming the almanac data is decent information source for these purposes, those correction factors put the numbers at SAE-corrected 298.7 and 294, respectively, rather than 300.2 and 280. So really I'm betting most of the difference was the weather. 4.7hp could be anything, likely the dirty filters __________________ 7AT Track Car! Journal thread / Car setup details

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