Graph question
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TECH Apprentice
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Joined: Jan 2010
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From: Arlington, TX
Graph question I just got my engine back, installed and tuned. Overall I am happy with the results but I have a question about the curve went. The power goes up and then stops climbing and then goes straight across. Is this normal?
Engine is a 408 at 10.3 compression, trickflow 225's, harland sharp rockers, cam is 244/248 612/615 on a 112, fast 102 ported by vengence, nw tb, factory 01 z06 maf, dual cone intake, kooks 1 7/8 headers, 3" off road x pipe, B&B prt catback. If more information about parts is needed just ask.
The tuner said there was not a drop in the map sensor which usually indicates a restriction.
Any ideas or thoughts?
http://i910.photobucket.com/albums/a.../Dynograph.jpg
Engine is a 408 at 10.3 compression, trickflow 225's, harland sharp rockers, cam is 244/248 612/615 on a 112, fast 102 ported by vengence, nw tb, factory 01 z06 maf, dual cone intake, kooks 1 7/8 headers, 3" off road x pipe, B&B prt catback. If more information about parts is needed just ask.
The tuner said there was not a drop in the map sensor which usually indicates a restriction.
Any ideas or thoughts?
http://i910.photobucket.com/albums/a.../Dynograph.jpg
Thread Starter
TECH Apprentice
iTrader: (1)
Joined: Jan 2010
Posts: 350
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From: Arlington, TX
I have seen graphs like that also but the vavle float is normally jagged on graphs no smooth. The long block was setup by the machine shop(HKE).
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Joined: Nov 2002
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From: Berkeley, California
Looks OK to me. Your engine, like all engines, starts “running out of air” beyond the torque peak. Peak torque occurs at peak volumetric efficiency. That power “flatlines” above the torque peak is a good thing. It means that VE is decreasing gradually, not falling off a cliff.
