Best for power and reliability? 6.2L or 6.5L

[grimjaw]

I have been thinking about a GM diesel for my next project. What I want is good power, a durable engine, ok mileage and no electronics. For this which is better, the 6.2L (N/a or turboed) or a 6.5L turbo? I have not been able to fine a good listing for the base power and power with a mild build on these engines. Thanks for any help.




I got a membership to The Diesel Page but I can not find what I am looking for.

 

[imiceman44]

I have been thinking about a GM diesel for my next project. What I want is good power, a durable engine, ok mileage and no electronics. For this which is better, the 6.2L (N/a or turboed) or a 6.5L turbo? I have not been able to fine a good listing for the base power and power with a mild build on these engines. Thanks for any help.




I got a membership to The Diesel Page but I can not find what I am looking for.

The 6.5l is obviously better if you stay with 93 and earlier, if it's turbo even better.
A 6.2 is not much further behind the 6.5 so it all comes back to the deals you can find.

 

[colbystephens]

iirc, a 6.2 w/ a banks is more powerful than the 6.5 w/ the gm issue turbo.

 

[grimjaw]

iirc, a 6.2 w/ a banks is more powerful than the 6.5 w/ the gm issue turbo.

Thats my understanding too. I just wanted ask, before making an expensive mistake. Thanks.

I am still looking of power numbers for a 'mild' build.

 

[colbystephens]

not sure what a mild build means, tRustyk5 posted a dyno sheet up on a thread in the garage a while ago which essentially showed a turbo'd 6.2 to be 200+ hp and over 500 lbft @ the flexplate/flywheel. i believe that was on an old tired engine which they just added a banks to.

 

[grimjaw]

OK, that should more than cover it. thanks.