A. G. Wilson Posted December 16, 2017 Share Posted December 16, 2017 Want to know horse power of naturally aspirated 673 c.i. Quote Link to comment https://www.bigmacktrucks.com/topic/51969-673-horse-power/ Share on other sites More sharing options...
tjc transport Posted December 16, 2017 Share Posted December 16, 2017 the END-673 NA engine was between 170 and 190 hp, depending on version. ENDT-673 was between 205 and 250 hp Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/51969-673-horse-power/#findComment-387589 Share on other sites More sharing options...
david wild Posted December 16, 2017 Share Posted December 16, 2017 I thought it was somewhere be not much and very little, still don't how we made it across country with so little power and today the kiddies with 500hp complain about lack of power ? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/51969-673-horse-power/#findComment-387591 Share on other sites More sharing options...
tjc transport Posted December 16, 2017 Share Posted December 16, 2017 maybe because we were not in such a big hurry back then. remember when you were hot snot if you had a 285 HP and a 10 or 13 speed? Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/51969-673-horse-power/#findComment-387594 Share on other sites More sharing options...
Freightrain Posted December 21, 2017 Share Posted December 21, 2017 The split intake manifold(673P) was the "hotter" set up compared to the single log manifold. If you don't have more then 30K lbs behind you, it will run with traffic easily enough. Just don't go to PA and think you can run the hills real fast LOL!! 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/51969-673-horse-power/#findComment-387890 Share on other sites More sharing options...
Maddog13407 Posted December 23, 2017 Share Posted December 23, 2017 some 673's were detuned to 150hp. they were in B43's and B47's Quote Link to comment https://www.bigmacktrucks.com/topic/51969-673-horse-power/#findComment-387987 Share on other sites More sharing options...
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