What is so special about the LB7 Duramax?
The LB7 Duramax diesel is a direct-injected, turbocharged, intercooled, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque. Starting from a blank sheet of paper, the 6.6L Duramax is recognized to date as the fastest diesel development program in the world.
How much HP can a LB7 handle?
Max “reliable” HP I would go is 400rwhp. Anything from stock is a risk of breaking somthing. Ive seen rods bend before headgaskets blow. Generally, rods are good to 500-550, IMO, pretty much anything over 500 is taking a risk of bending.
How long should I let my LB7 warm up?
2-3 minutes is plenty unless it’s extremely cold and you didn’t plug in the block heater. You need just enough to get oil circulated and let the pistons warm up a little, no more than 10 minutes on a very cold day (-10 and colder).
Do you have to wait to start a Duramax?
Wait-to-Start Light Wait until the light turns off before starting the engine. This light may not come on in warm temperatures. The fast warm-up glow plug system makes the wait-to-start light stay on for a shorter amount of time than most diesel engines.
What is wrong with LB7?
The LB7 Duramax is more prone to head gasket failures than future generations of the Duramax engine. Despite this, head gasket failure usually doesn’t occur until over 100,000 miles, so it’s not nearly as common as it is in 6.0L Powerstroke engines. LB7 Duramax head gasket problems can occur for a couple of reasons.
Is the LB7 or LLY better?
LB7 gets way better fuel economy, runs cooler. I do like the automatic high idle on the LLY(with the auto start), beats walking out in the cold and flipping a switch.
How much horsepower can you get out of a LB7 Duramax?
When it was released, the LB7 Duramax was incredibly impressive. It had 235 horsepower and 500 lb-ft of torque, tremendously more power than earlier GM diesel trucks. In the last year the it was offered, stock performance was increased to 300 horsepower and 520 lb-ft of torque.