How much HP can a LB7 engine put out?
Because we’re not into blanket statements that assume all LB7 and LLY engines will die at the 550-to-600-rwhp mark, this truck represents the exception to the rule. Laced with 60-percent over injectors, a stroker CP3, and a Work Stock 66mm turbo, it withstood more than 700 hp for quite some time.
How many miles will a stock LB7 last?
We’ve seen a 150,000-mile, stock bottom-end LB7 equipped with 60-percent over nozzles, stroker CP3, and a 66mm turbo live several years at 700-rwhp. The key? EFI Live tuning that was custom tailored to limit low rpm torque, yet pour on the timing and pulse width up top.
What is the best LB7 Duramax performance upgrade?
Aftermarket fuel tanks are one of the best and underrated LB7 Duramax performance upgrades out there. They offer almost twice the fuel capacity of standard tanks and are bolt-in for an easy installation. Cut your gas station visits in half and save precious time with an aftermarket fuel tank! Here are some quality tanks that we would recommend.
How does the LB7 reduce emissions?
Unlike modern diesels featuring a diesel particulate filter (DPF) and urea injection, the LB7 is almost emissions free. These emissions devices greatly reduce CO2 emissions, however it comes at a price. They often hinder performance and also reduce overall reliability. Therefore, the lack of these emissions work in the LB7’s favor.
How much boost can a stock LB7 turbo handle?
The stock turbo will go to 32psi safetly. Have heard of them going over that but wouldn't recommend it.
What size is the stock turbo on a LB7?
60mmStock Turbo, 1,200 HP! Along with the engine, the factory 60mm IHI turbocharger is still aboard Buddy's LB7.
How much HP does a LB7 make stock?
Producing 235-300 horsepower and 500-520 lb/ft of torque, the LB7 Duramax was a beast....6.6L LB7 Duramax Specifications Chart.Manufactured Years:2001-2004Fuel Tank Size:26 GallonsMax Engine Speed:3,250 RPMHorsepower:235-300 horsepower20 more rows•Jun 3, 2019
How much boost should a stock Duramax make?
The factory map sensor which electronically measures boost on a 2001-2004.5 trucks only reads to 22-24 psi, 2006-2016 MAP sensors read to 37 psi. If you want to read boost numbers higher you'll need an aftermarket gauge.
Are LB7 fast?
Motor work it is a very fast truck the lb7 is the fastest motor of all the duramax motors.
How much power can a LB7 handle?
550 to 600 hpCouple that with a weaker connecting rod and you can draw a pretty strong conclusion as to why the LB7 rods fail in the 550 to 600 hp (1,100 to 1,200 lb-ft.) range. While we tend to talk in terms of horsepower, it's the torque of these engines that does all the damage.
Is LB7 a good motor?
LB7 Duramax Reliability The LB7 is a great engine, when it is stock. The block and internals are plenty capable of lasting 350,000+ miles. Most of the injector issues and head gasket faults should be fixed in these trucks now given their age.
How much HP can a Allison 1000 handle?
Allison 1000, Six-Speed ('07.5-'10) By the time the LMM-powered GMs hit the market, aftermarket tuning of the TCM had progressed enough to where the Allison could withstand 430 to 450-rwhp for extended periods of time—and 500-rwhp on occasion.
What's better LB7 or LBZ?
Lb7- great fuel mileage, cheaper, sound better, injectors suck and very good throttle response. Lbz- WAY more power, quieter engine compartment (noisier injectors though), more turbo lag, factory high idle which is great, and the best part is the 6 speed alli.
How do I know if my LB7 turbo is bad?
Signs of a Bad TurbochargerToo Much Exhaust Smoke. If the casing of your turbocharger cracks or if some internal seals are worn out, it could cause the oil to leak into your exhaust. ... Loss of Power. ... Increased Oil Consumption. ... Loud Siren Noise. ... Check Engine Warning Lights. ... The Boost Gauge.
What do I need to know about LB7 Duramax?
LB7 Hard FactsProduction'01-'04Cast aluminum, six 14mm diameter head bolts per cylinder (with sharing)Displacement6.6L (403ci)Bosch CP3Compression Ratio17.5:1IHI RHG6 fixed geometry (with wastegate)BlockDeep-skirt, cast iron (gray iron alloy)Air-to-airRodsForged steel, fractured300hp at 3100 rpm4 more rows•Nov 29, 2018
How much boost is alot?
If you have a stock engine, with a compressor that is factory set to produce no more than twenty pounds of boost, you shouldn't modify the system to make it produce much more than 25 pounds of boost. And increase of 5 pounds over stock is probably the limit you should go by.
How much horsepower does a LB7 have?
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. That didn’t stop diesel performance companies from coming up with creative way to improve the LB7 even more though. In fact, there are a number of LB7 Duramax performance upgrades that every owner of these trucks should consider. In this post, we’re going to list 15 of the best LB7 Duramax upgrades for these trucks. If we had an LB7, these are the products we would have on our own truck. Let’s get in to it!
Why is the intake on a LB7 Duramax so high?
Many LB7 Duramax trucks experience higher intake air temperatures because hot air is being pulled from the engine bay. The stock filter is also too restrictive.
How much horsepower does a Duramax 67G2 turbo have?
If you have the supporting mods, however, here are some quality performance turbo kits to consider. The LB7 Duramax Stealth 67G2 Turbocharger is good for up to 800 horsepower. Despite it’s factory look, this turbocharger offers more power while still being able to be used on a daily driven truck.
What is the Air Intake System on a Banks Ram?
The Banks Ram Air Intake system is the perfect CAI upgrade to pair with their Six-Gun or EconoMind Diesel Tuners. It outflows the factory intake by 57%, and brings cooler, denser air to the engine. This results in respectable performance gains, lower EGTs, and better fuel economy.
Is tuning a Duramax?
For this reason, tuning is the first LB7 Duramax performance upgrade on our list. Tuning provides immediate results and is fairly inexpensive.
Does the LB7 Duramax have more horsepower?
LB7 Duramax performance upgrades not only give you more horsepower, and torque, but they can also increase durability, and fuel economy! Before buying any performance products, consider what you’re going to use your truck for. Then base your purchasing decision on that.
Does the 2004 LB7 Duramax have to stay that way?
They offer twice the horsepower, torque, and tow capacity of the original Duramax. It doesn’t have to stay that way though. The 15 LB7 Duramax performance upgrades listed below significantly improve the drivability and performance ...
How much mileage does a LB7 have?
It may be getting hard to come across super clean low mileage LB7 trucks, but even at higher mileage (150,000+) if an owner has been diligent with regular maintenance, the LB7 can make for a great daily driver.
What turbocharger is used in LB7 Duramax?
With these modifications taken care of, the real performance-limiting factor with the LB7 Duramax is the factory IHI turbocharger. While the stock turbocharger can support up to 530 horsepower relatively safely, EGTs can get quite hot, and the stock compressor wheel will start pushing past its efficiency range. To overcome some of these issues, DuramaxTuner out of Marengo, Illinois, developed their Stealth 64 Duramax Turbo as a true drop-in replacement for the factory IHI turbocharger. After doing extensive in-house testing on both their Superflow chassis dyno and undergoing real world daily driving and towing situations, their new 64mm modified stock turbo offered gains of over 80 horsepower making 600+rwhp while maintaining that same responsive off-idle boost and fast spool-up owners become accustomed to from their stock turbos.
What is the weakest link in the Duramax LB7?
The weakest link in the LB7 Duramax’s rotating assembly is its connecting rods. Like all Duramax engines, the rods are made from forged steel and feature a cracked cap design. However, less material exists in the bottom of the beam area when compared to ‘06-‘10 engines. The lack of meat in this critical area helps explain why the rods are prone to bending at lower horsepower and torque levels, as well as why LB7 rods weigh less than the units you’ll find in LBZ and LMM models (1,155 grams vs. 1,173 grams).
What is the strongest connecting rod for a Duramax?
Without a doubt, the most popular aftermarket connecting rod for the Duramax is the forged-steel H-beam from Carrillo. At 1,090 grams apiece, they’re lighter than any factory Duramax rod, and are said to be the strongest, hence the frequency with which they’re used in engine builds and their high availability.
Is torque a weak link?
Because torque ( i.e. cylinder pressure) is the primary killer of rods and pistons, it’s difficult to directly link a horsepower number to each engine’s weak link. However, as a general rule of thumb, a common consensus exists for the horsepower thresholds listed here (and the torque that goes along with those numbers).
Is the LLY Duramax the same as the LB7?
With the LLY Duramax sharing the same connecting rod as the LB7, it’s no surprise that this component is also the weakest link in the second generation of the Duramax. And, like the LB7, compression once again checks in at 17.5:1, meaning higher peak cylinder pressure (i.e. torque) beating down on it. But the LLY introduces one more ingredient to the weak connecting rod recipe.