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0512htp Afr 24 Z

When we returned to the dyno with the new heads the temperature had raised only 3 degrees and humidity also increased by 3 percent with very little change in barometric pressure, which helps keep consistency with the test. A few pulls were made before Robert took the helm with the HP Tuners software and the results were a respectable 345 hp and 316 lb-ft, which was a 27 hp and 24 lb-ft improvement. One concern, however, was that the pig-rich 11.18:1 air/fuel ratio was relatively unaffected. In addition to adding about 3 degrees of timing Robert went to work leaning the mixture.
1999 Chevy Corvette - AFR 205CC Heads - Cobra Killers

 When we returned to the dyno with the new heads the temperature had raised only 3 degrees and humidity also increased by 3 percent with very little change in barometric pressure, which helps keep consistency with the test. A few pulls were made before Robert took the helm with the HP Tuners software and the results were a respectable 345 hp and 316 lb-ft, which was a 27 hp and 24 lb-ft improvement. One concern, however, was that the pig-rich 11.18:1 air/fuel ratio was relatively unaffected. In addition to adding about 3 degrees of timing Robert went to work leaning the mixture.  View Related Article

 

 

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