Not Ranked
Dynos in the OEM universe are calibrated to an SAE defined set of specifications.
Dynos in the performance aftermarket are calibrated to the integrity of the owner.
Both are subject to legitimate variances due to outside environmental issues - temperature, humidity etc. These issues are addressed with software derived correction factors which are deemed reasonable but still not perfect.
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Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
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