97Chevyguy Posted June 6, 2002 Share Posted June 6, 2002 About how much horsepower does a 1997 5.7 Vortec engine produce? The engine is the exact same as I bought it, no mods or anything. Link to comment Share on other sites More sharing options...
95Yukon Posted June 6, 2002 Share Posted June 6, 2002 Around 245 hp@4600 and 325 ft lbs torque at 2800rpm Link to comment Share on other sites More sharing options...
CMNTMXR81 Posted June 7, 2002 Share Posted June 7, 2002 255 not 245. Link to comment Share on other sites More sharing options...
89_silverado Posted June 7, 2002 Share Posted June 7, 2002 330 ft/lbs of torque not 325 Link to comment Share on other sites More sharing options...
jst4f Posted June 7, 2002 Share Posted June 7, 2002 Go the the following GM site for the specs on the 5.3L engine. 5.3L Votex Engine Spec Hopes this answers your questions. Link to comment Share on other sites More sharing options...
95Yukon Posted June 7, 2002 Share Posted June 7, 2002 I thought we were talking about a 5.7 not a 5.3 The 245 numbers are actual dyno numbers on a stock engine, not advertised GM figures. Depending on small factors (air temp, fuel quality etc) these will vary, but those are the numbers +/- 5hp depending on the day of the week. Link to comment Share on other sites More sharing options...
95Yukon Posted June 7, 2002 Share Posted June 7, 2002 Per GM, its 255hp@4600 and 330lb ft@2800 depending on the vehicle.. (notice the a,b,or c advertised ratings here) http://www.gm.com/automot....l31.htm Link to comment Share on other sites More sharing options...
jst4f Posted June 10, 2002 Share Posted June 10, 2002 I thought we were talking about a 5.7 not a 5.3 The 245 numbers are actual dyno numbers on a stock engine, not advertised GM figures. Depending on small factors (air temp, fuel quality etc) these will vary, but those are the numbers +/- 5hp depending on the day of the week. Oops! Why did I point to a 5.3l...losing it I guess. The spec for the 5.7l are at; 5.7l Engine Spec Obviously this is per GM advertising. Compare these specs to the ones for the 5.7l engine in my 1979 Suburban 165 Hp at 3600 rpm and 270 lb-ft at 2000 rpm. Hopes this helps....this time Link to comment Share on other sites More sharing options...
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