How can you tell the difference between LLY and LB7?
If the 8th digit of your VIN number is a 1, then it is a LB7 Duramax (the early engine). If the 8th digit is a 2, then it is a LLY.
Are LB7 and LLY injectors the same?
The 2006 LLY and LBZ use the same injectors, but they are totally different from the injectors on the LB7 or the 2004.5 thru 2005 LLYs.
Will a lly turbo work on a LB7?
The LB7 ECM has no way to control the LLY turbo.
What does LLY mean for Duramax?
LLY doesnt stand for anything specific, its just the RPO (regular production order) code that means “Duramax diesel engine”.
What turbo does the LB7 have?
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.
What’s the difference between lly and LBZ compression ratio?
Highly beneficial to enthusiasts seeking to add power to an already-potent package, the LBZ came with a lower compression ratio than its LB7 and LLY predecessors (16.8:1 vs. 17.5:1). This meant the engine would see less peak cylinder pressure, which resulted in its connecting rods being subjected to less stress.
What kind of ECM do I need for LBZ LLY?
In conjunction with running custom ECM tuning, always opt for TCM tuning as well. A fine-tuned TCM will optimize your shift points, improve torque converter clutch engagement and minimize defueling. Use the same style turbine housing outlet as the VVT turbo on the LLY, the same 3-inch diameter downpipe can be employed on the LBZ.
What kind of exhaust system does the LBZ Duramax use?
Nearly all of the exhaust systems available for the LBZ Duramax can also be used on the LB7 (’01-‘04), LLY (’04.5-‘05) and even the LMM (’07.5-‘10). Diamond Eye Performance ’s 4-inch diameter, downpipe-back, aluminized exhaust system (shown) is one of these systems. Depending on where you shop, it will run you $250 to $270 online.
When to upgrade Allison Transmission on LBZ Duramax?
Like all Duramax-powered GMs, the Allison automatic transmission will need to be upgraded early on in the modification process, namely if you plan to go much further than 400rwhp. At any power level beyond 600rwhp, the LBZ’s factory pistons are at risk of cracking.