Best power stroke

[sunsetorangeHD]

I am a chevy man true and through. Although i would like to know in anyone's best opinion with all the diesels which is the best year power stroke, cummins and duramax.

[kemble]

Cummins is easy, 1998 P pumped 12 valve with a manual transmission. The same engine with an automatic had a lower HP rating due to pump differences.

[Jon4x4]

the new 6.7 PSD is a monster, i still love me a dmax though

[DarkCharisma]

6.4 Powerstroke with studs and EGR delete.

[Mark13]

Cummins: A P pumped 12v (94-98) is a pretty good place to start if your looking for reliability and power. A common rail (03-current) with some mods and good tuning can be a lot of fun and be reliable too. Plus your able to easily change hp/tq levels for conditions. A 24v is a good motor with fueling issues in stock form. A p-pumped 24v is how they should have been made.

PowerStroke: A 99+ 7.3 is a good reliable motor, there isn't much for power potential unless you've got alot of time and really deep pockets. The 6.0's started off pretty poorly, they didn't end much better but they did improve. With some aftermarket help they can be made reliable and a blast to drive. Not to mention they have a unique sound that will give you the chills when one's running north of 3500rpm. The 6.4's have a bad reputation due to the emissions requirements on them and how they are in stock trim. With good tuning, egr delete, head gaskets and head studs, intake, exhaust, and some trans parts they are absolute monsters. Nothing like a 600hp+ truck with no internal motor work, mostly all just tuning and other parts for reliability.

Duramax: The lb7's (01-early 04) are known for a high rate of injector failure's. Their also known for being easy to get power out of. Stock they are not really very exciting to drive, tuning will fix that easily. And if just an exhaust and a good set of tunes isn't enough for you, their is plenty of aftermarket support available to turn them into very reliable 1000hp+ truck's that you can still daily drive and not have reliability problems with. They are also known to usually get the best fuel milage out of any of the duramax motors.
The lly (late 04-early 06) motors are pretty reliable, for the most part the injector eating habits of the lb7 were fixed. They have a tendency to get warm though if you work them pretty hard. A common swap to a better flowing air intake where it meets the turbo seems to be a fix for that problem. I don't know much more about them otherwise I'd say. 2006 was also the last year for the zf6 manual transmission option. If you got really really really... really lucky you got one with a zf6 manual transmission behind the lly motor in 2006. And if it's not a regular cab, you did even better.
The lbz trucks (06-07 classic) seem to be the most wanted. At the time they had the most power from the factory and they didn't have all the emissions stuff the 07.5's got. They also got the 6 speed allison 1000 instead of the 5 speed in the 01-05 trucks. There was no manual transmission offering when the lbz trucks were produced. With egr block off, pcv reroute, some tuning, and a straight pipe you've got a motor that's as happy as can be and is alot of fun to drive.
The lmm trucks (07.5-10) were very similar to the lbz trucks, just someone jammed as much crap and restrictive stuff in the exhaust as possible to make them better for the environment, luckily through the aftermarket all of that useless bs can be deleted.
The lml trucks ('11-?) are also stuck with all the emissions bs. Only instead of restrictive exhaust stuff they have a urea injection system. The motors were slightly redesigned along with the 6 speed allison to handle a bump up in power and torque. As far as anything else you want to know about them, ask someone else. I don't have a clue. And if you care, there probably will not be an option to tune them with Efi-Live unfortunately.

[DarkCharisma]

Mark; on the LLY's, they used the same RPO for two different engines.

The 04.5-05 LLY's were different than the 06-07 LLY's entirely. The 06-07 LLY is an LBZ with factory de-tuning. You can flash the ECM to go from a LLY power level to a LBZ power level.

Aside from that, you're right on. :cheer:

[Mark13]

Mark; on the LLY's, they used the same RPO for two different engines.

The 04.5-05 LLY's were different than the 06-07 LLY's entirely. The 06-07 LLY is an LBZ with factory de-tuning. You can flash the ECM to go from a LLY power level to a LBZ power level.

I've heard so many difference sides to that discussion that I eventually gave up listening and never did check back to see if there really was a difference. I figured there probably was but didn't care enough to look I guess.