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5.7 Vortec specs


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#1 97Chevyguy

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Posted 06 June 2002 - 10:21 AM

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.
1997 Chevy Silverado 1500
2WD, Extended Cab/Short Bed
5.7L Vortec(350) V8
Towing Package
Flowmaster Split Rear Dual Exhaust
Cobra CB Radio

#2 95Yukon

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Posted 06 June 2002 - 05:14 PM

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

#3 CMNTMXR81

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Posted 06 June 2002 - 11:20 PM

255 not 245.
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Summer toy #1) 2004 Pontiac GTO - Impulse Blue Metallic, M6, lots of mods to create senseless levels of power
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#4 89_silverado

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Posted 07 June 2002 - 09:27 AM

330 ft/lbs of torque not 325

#5 jst4f

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Posted 07 June 2002 - 01:37 PM

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


5.3L Votex Engine Spec

Hopes this answers your questions.

#6 95Yukon

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Posted 07 June 2002 - 05:34 PM

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.

#7 95Yukon

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Posted 07 June 2002 - 05:52 PM

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

#8 jst4f

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Posted 09 June 2002 - 11:13 PM

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! :D 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