Depends on the year and the induction system. In 1964 389 4bbl was rated at 325Hp 389 tripower was 348hp. In 1965 ratings were raised to 335 for the 4bbl and 360 for the tri power. Of course all these were "gross" rating which cannot directly be compared to the sae net ratings listed from 1972 forward.
it depends on the year model and the engine size,for example the 64 gto tri power 389 cu. inch had 348 horsepower. the 69 ram air 400 gto had 365 horsepower with the right heads and carb combination. The '04 models are rated at 350 hp, and the '05-'06 models at 400 hp.
Not in the GTO. You had a choice of 389 Tri-power (19,045) or 389 4 barrel. ( 77,901)
Oldsmobile V8/1962 TO 1977
The 2004 gto has 350 hp coming from the engine but that is not rwhp.
You might wanna check Wikipedia.
1964 Standard 389 4bbl had 325 horsepower. Optional 389 Tri-power had 348 Horsepower
389 cubic-inch. 360 horsepower
The 1964 GTO had a 389 and at least some had a triple deuce setup.
How much horse power does a 1969 Pontiac GTO have ? 1969 gto had seven different block codes and a total of four different horse power ratings as follows: WS @ 366 hp, WT @ 350 hp, WW @ 370 hp, XP @ 370 hp, XX @ 265 hp, YS @ 350 hp, YZ @ 366 hp. The 366 hp were Ram Air III motors and the 370 hp were Ram air IV motors. All WW blocks were manual trannys and the other block codes were automatic trannys.
Driver side front cylinder.
Info at this site might be helpful. http://www.justanswer.com/questions/2zzo6-timing-a-1966-pontiac-gto-389-with-tri-power-what-is-the-best
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