ingenio

iTrader: (1)

Hi guys,

Could you please share with me some engine performance charts for the LM7 & LQ4 engines, that includes performance at LOW RPM ( 1000-4000rpm charted). All the charts I have found are for peak values (high speeds), and most of them are charted from 2500/3000 rpms and up.
The vehicle I'm considering for the swaps spends 99.99999% of its life between 1500 & 2500 rpms. ( Off road crawler vehicle)

I know these Gen III engines are great at high rpms...but wondering what are the specs at "real life driving" rpm's ???.

thanks in avance for the help.

Pedro

99Bluz28

iTrader: (35)

This might help:
LM7; 270-295 hp, and 315-335 tq, depending on model yr ..
LQ4; 300-325 hp, and 360-370 tq, depending on model yr..

ingenio

iTrader: (1)

[QUOTE=99Bluz28;17659426]This might help:
LM7; 270-295 hp, and 315-335 tq, depending on model yr ..
LQ4; 300-325 hp, and 360-370 tq, depending on model yr..[/QUOTErque]

Thanks for the post, but I believe you posted the peak values, and these are produced at high rpm (4500 rpm aprox)....

I need to know the torque at 1500/2500 rpms

KCS

iTrader: (20)

Most people don't dyno that low.

rennat_2006

iTrader: (10)

I dont have the numbers but i can tell you from expirence and rock crawling myself(see signature) thst you will want a 6.0l. Like i said i dont have actaul numbers but its obvious with the butt dyno 6.0's pull alot harder sooner than 5.3's which need some rpms and a little higher stall converter.

wildcamaro

iTrader: (15)

It's all about gearing in a crawler rather than engine performance, bt like others said 6.0 is the way To go for most low end torque...

bww3588

iTrader: (49)

Wrong.

The more power you can make at a lower rpm is where it is rock crawling. You do not want to turn the engine to the moon while moving at a very slow speed. Not only does this increase heat and wear on the engine, but you also need a gear ratio that allows you to crawl, and get wheel speed for mud and heating the tires up on rocks.