Gen III hp ratings

[USMC09]

I was playin around on ebay and came across these hp ratings for gen III motors

Check this out

The 6.0 I figured was right but are the others really that close?

[silverado06]

Thats the 6.0 out of a truck not a vette, thats why its close the lq4 is truck, ls2 is vette.

[USMC09]

Yea I know that, I've seen that # for the 6.0 before. I was wondering if the 5.3 and 4.8 really had as much power as this guy says.

[silverado06]

those are engine hp not rwhp mine is rated, or i should say they told me "305" hp but its not i know, its a quick motor to say the least.

[DBYRD]

depending on the truck the difference in the 6.0 and 5.3 can be a huge difference or a tiny difference. in a small truck its like night and day. the 5.3 is a great motor but the 6.0 does super with a rcsb. every mod u do to a 6.0 will have a better effect than the 5.3 imo.

[txarkitekt]

Ok, ok. I will try and dip into the memory bank here:

1999-2002

4.8L (LR4) 270 hp/285 ft. lb.
5.3L (LM7) 285 hp/325 ft/ lb.
6.0L (LQ4) 300 hp/360 ft. lb.
8.1L (L18) 340 hp/455 ft. lb. (01-04 only?)

02-07 Classic

4.8L (LR4) 285 hp/290 ft. lb.
5.3L (LM7) 295 hp/335 ft. lb.
5.3L FF--E85 (L59) 295 hp/335 ft. lb.
5.3L HO (L33; 05-07 Classic) 310hp/335 ft. lb. (available in EC 4WD only)
6.0L (LQ4) 325 hp/370 ft. lb.
6.0L HO (LQ9--VortecMAX, had special high-compression 10:1, flat-top pistons) 345 hp/380 ft. lb.

That is as much as I know from 1999-2007 Classic. I am sure if you need the NBS hp figures, you can go to GM's website.

[chuckie311]

<div class='quotetop'>QUOTE(txarkitekt &#064; May 18 2007, 07&#58;55 AM) [snapback]93880[/snapback]</div>

Ok, ok. I will try and dip into the memory bank here:

1999-2002

4.8L (LR4) 270 hp/285 ft. lb.
5.3L (LM7) 285 hp/325 ft/ lb.
6.0L (LQ4) 300 hp/360 ft. lb.
8.1L (L18) 340 hp/455 ft. lb. (01-04 only?)

02-07 Classic

4.8L (LR4) 285 hp/290 ft. lb.
5.3L (LM7) 295 hp/335 ft. lb.
5.3L FF--E85 (L59) 295 hp/335 ft. lb.
5.3L HO (L33; 05-07 Classic) 310hp/335 ft. lb. (available in EC 4WD only)
6.0L (LQ4) 325 hp/370 ft. lb.
6.0L HO (LQ9--VortecMAX, had special high-compression 10:1, flat-top pistons) 345 hp/380 ft. lb.

That is as much as I know from 1999-2007 Classic. I am sure if you need the NBS hp figures, you can go to GM&#39;s website.
[/b]

here is a good site if you want to look up info on trucks and engines..

http://www.internetautoguide.com/car-speci...p/32/index.html


02-07 - the LQ4 6.0l is Power: 300 HP SAE @ 4,400 rpm; 360 ft lb , 488 Nm @ 4,000 rpm

[adrenalinep]

THE 04 5.3 S PUT OUY OUT 295HP AND 330 FT/LB 0F TQ , 99-01 LQ4 300HP AND 355 LB/TQ. tHE 02 AND UP LQ4 PUT OUT 325HP AND 370FT/LB TQ ACCORDING TO THE LS1/LS6 BOOK BY WILL HANDZEL. mY 99 5.3 ONLY PUT OUT 265HP AND 320 FT/LB TQ

[chuckie311]

i have a lq4 in mine and its rated at 300 hp and 360 tq

5,967 cc 6 liters V 8 front engine with 101.6 mm bore, 92 mm stroke, 9.4 compression ratio, overhead valve and two valves per cylinder LQ4
Unleaded fuel 87
Multi-point injection fuel system
25.9 gallon main unleaded fuel tank
Heavy duty engine cooling system
Power: 224 kW , 300 HP SAE @ 4,400 rpm; 360 ft lb , 488 Nm @ 4,000 rpm

[txarkitekt]

I just now realized that GM let their little 5.3L crank out more power than the 6.0L...the 5.3L HO (L33) made 310hp/335 ft. lb., but it was available in EC 4WD only. That is 10 more hp and 25 ft. lb. less torque--which isn&#39;t a lot. I am not sure where everybody got their numbers from--I just used what was stored in my brain--but....I just now looked up this awesome link and found out some really neat info and history on the LS engine...