Dyno numbers are like flow bench numbers- machine dependent! My RAIV 400 HO itnake 800 cfm Qjet 2" headers dynoed 385 on a very conservative dyno-through a muffler system. Wallace calculator shows 415-420 using 108 or 109. My pump gas 455 in the 78 now dynoed 525 on a different dyno also conservative at 3750 lbs and 124 Wallace pegs it at 587!
So 440 is not too bad for some Dport-even though aluminum-heads
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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
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