5.7 Vortec specs

[97Chevyguy]

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.

[95Yukon]

Around 245 hp@4600 and 325 ft lbs torque at 2800rpm

[CMNTMXR81]

255 not 245.

[89_silverado]

330 ft/lbs of torque not 325

[jst4f]

Go the the following GM site for the specs on the 5.3L engine.

 

 

5.3L Votex Engine Spec

 

Hopes this answers your questions.

[95Yukon]

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.

[95Yukon]

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

[jst4f]

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