I wouldn't say it's on par with an LS1, but it is the best small block gas engine that Dodge has produced in a long long long time. I doubt you will see any aluminum block truck engines anytime soon due to the fact that those blocks don't hold up well against the torture that a truck subjects it too. Drop an LS1 into a 4x4 and do a stream crossing while the engine is hot (4-wheeling); bye bye engine block!

We may not see a LS2 in an SS, but the Gen IV engines will probably be based on the LS2 just like Gen III is based off the LS1.

 

So is an iron block better for cooling and stress???

 

actually the trucks will get a better version of the gen 4 v-engine family

 

Never quote dyno numbers unless you know that the dyno used is the same type. A Dyna Pack and Dyno Dynamics dyno spit out two totally different numbers. Then there is a conversion factor that varies between dyno operators.

Just put it on the track and see what MPH it gets over xx distance, then you'll be able to get a better idea of what it really has. There are a few good HP calculators on the web that are right on par with HP estimates.

 

A better IV gen than the cars???

 

4.8 = 293
5.3 = 325
5.7 = 346
6.0 = 364
8.1 = 496

Please correct me if i'm wrong truck guru's

 

I know there are always slight offs. The original 327 were considered 5.3 and the 350 is considered a 5.7 so I was just checking if it was exact, thanks for keeping me straight on my facts, man!!!

 

Look At The Rings On A Old 327 And It Will Say 5.4

 

i thought our engines were a 323 ci? maybe i am wrong.

 

From my research and reading, the Dodge 5.7L (I dont like referring to them as Hemis, even though I own one, hehe) put down in the low to mid 260s on average, and around 300 rwtq. The 04 model year seems to have stabilized somewhat the fluctuation in output that was seen in the 03 model year (changed pcm). They average about a 23% drivetrain loss. Also, the 5.3L GM is 325ci, and is just referred to as 327, much like the 5.7L GM was actually a 346 but called 350.