Horsepower And Torque Ratings?

[Matts99z71]

Just wondering if anyone knows offhand what the ratings are for these two years. 1999 5.3 and 1997 5.7.

No particular reason......

[ColoradoSkiCountry]

1997 5.7L Vortec had 250 HP 1999 5.3L had I believe 280-285 HP.

[97SierraGMC]

what did a TBI 5.7 have?

[ColoradoSkiCountry]

Not certain, maybe 225 or so?

[MS3DALE]

1997 5.7L Vortec had 250 HP 1999 5.3L had I believe 280-285 HP.

 

Nope...'97 5.7 had 255hp and 330tq and '99 5.3 had 270hp and 315tq

[97SierraGMC]

nice 15 more tq

[MS3DALE]

what did a TBI 5.7 have?

Depends on what year,My '93 had 210hp,but my '94 had 200hp....this is in 1/2-ton & "light" 3/4-ton trucks,the 5.7's in "heavy" 3/4-ton & 1-ton trucks had 190hp.

[2000DV4.8]

what did a TBI 5.7 have?

Depends on what year,My '93 had 210hp,but my '94 had 200hp....this is in 1/2-ton & "light" 3/4-ton trucks,the 5.7's in "heavy" 3/4-ton & 1-ton trucks had 190hp.

 

 

 

That just sounds... strange.

[MS3DALE]

what did a TBI 5.7 have?

Depends on what year,My '93 had 210hp,but my '94 had 200hp....this is in 1/2-ton & "light" 3/4-ton trucks,the 5.7's in "heavy" 3/4-ton & 1-ton trucks had 190hp.

 

 

 

That just sounds... strange.

 

 

Yeah,strange but true.

 

The "Heavy" 3/4-ton-up trucks (8600lb GVWR & up) had "HD" emissions and different compression which meant less hp.

 

I'm not sure why there was a hp difference between '93 & '94 1/2-ton model-years,but I had both years,and the only thing I noticed that my '94 had that my '93 didn't have was a "resonator/silencer" on the air intake tube (The tube running from the RH fender to the air cleaner itself)

Also my '93 had a flat "pancake" style converter,where as my '94 had a "rounded" style converter called a "closed coupled exhaust"

[97SierraGMC]

so Vortec only added about 45 HP? still nice... what about TBI Tq numbers?

[MS3DALE]

so Vortec only added about 45 HP? still nice... what about TBI Tq numbers?

Anywhere between 300-310,again it depends on the year,and if its a "LD" or "HD" emissions 5.7

[Matts99z71]

Thanks guys, whats the codes in the glovebox again for 4.10 gears and 3.73? I know my 99 has 3.73.

[GMCrazy777]

thats weird. i had a 92 and it would smoke my 97. 97 was a vortec and my 92 wasnt. doesnt the 97 have more power? they were both light duty and 2 wheel drives.

[2000DV4.8]

Thanks guys, whats the codes in the glovebox again for 4.10 gears and 3.73? I know my 99 has 3.73.

 

 

GU6 is 3.42, GT4 is 3.73, GT5 is 4.10

[2000DV4.8]

thats weird. i had a 92 and it would smoke my 97. 97 was a vortec and my 92 wasnt. doesnt the 97 have more power? they were both light duty and 2 wheel drives.

 

 

Were they the same cab/bed configuration?