where do the xtra ponys come from?

[turbofrank]

Where does the Avalance get it's extra ponies from compared to the Silverado 5.3?

 

Thanks

Frank

[RyanbabZ71]

whats the hp rating for the av?

 

Silverado is 285

[RyanbabZ71]

from http://www.chevrolet.com

 

Avalanche

 

Vortec 5300 V8 Engine

The standard Vortec 5300 V8 SFI engine in the Avalanche 1500 has 285 horsepower @ 5200 rpm and 325 lb.-ft. of torque @ 4000 rpm.

 

Silverado

 

Vortec 5300 V8 SFI Engine (more>)

 

285 horsepower @ 5200 rpm

325 lb.-ft. of torque @ 4000 rpm

Standard four-speed automatic transmission

 

Both are the same from what i can see

[turbofrank]

Sorry, I read in car and driver that it had 270hp and 315ftlbs compared to the avalance 285 and 325.

 

Thanks

Frank

[HillHound]

Maybe the article was using the numbers for the 4.8L V8, which GM offers as a smaller V8 engine option for the Silverado.  The 270hp sounds right, but I don't know where the 315 torque rating comes from??

[RyanbabZ71]

270 hp was from the 99 trucks.  In 2000 the 5.3 went up to 285hp

[alsz71]

I know I've seen this posted somewhere else ....but what did they change from '99 - '00 ?  To get an extra 15 hp.

[MountaineerTom]

I know I've seen this posted somewhere else ....but what did they change from '99 - '00 ?  To get an extra 15 hp.

They used the Cam from the 6.0 in the 5.3 to get the difference.