CK5
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So lets have a serious Cummins vs 6.5 discussion
- Thread starter 80' 427
- Start date
I offer my serious opinion to a serious discussion: I like my 6.2/6.5 turbo.
It's not a Cummins, and I don't ask it to be one. No 20,000 lb loads, no sled pulls, and it won't peg the needle on a dyno. But, it's very effective for my needs - trail driving and pulling the occasional hot rod.
Also, I'm so hard headed that I refuse to deviate from, what I was told as a kid is, an engine cast from the iron of Thor's own hammer.
David
It's not a Cummins, and I don't ask it to be one. No 20,000 lb loads, no sled pulls, and it won't peg the needle on a dyno. But, it's very effective for my needs - trail driving and pulling the occasional hot rod.
Also, I'm so hard headed that I refuse to deviate from, what I was told as a kid is, an engine cast from the iron of Thor's own hammer.
David
Phil, the story starts like this GM asked its detroit diesel division to build them a nice light duty diesel to be a alternative to the 305/350. So they worked day and night to build an excellent engine with forged crank, and other excellent engine components. GM said, while that is real nice, it is too expensive, cheapen it up. Detroit told them to F off. So GM redesigned it with an eye on cheap using a cast crank and other lighter parts. Martin worked for detroit and they offered no.parts for the 6.2 nor did they ever do any warranty work. For example if you have a new Silverado with an Allison transmission you can take it to a detroit dealer and have it worked on under warranty. In fact I am sure when a dealer works on an Allison, that eventually gets billed to Allison. Clear as mud?
Yea I read the engine got cut by the bean counters I didn't realize it was Detroit that told em to take a hike! I hear the newer motors for the hammers have the forged crank and better block to handle some abuse, considering a lot of 6.2's got the banks retrofit I'd be surprised to know how many actually survive. A note on the 6.2 from my reading the heads are supposed to flow pretty decent?? And considering the rpm range that should hypothetically make a decent towing motor.. Once you deal with the weak spots no? Or should he ditch it for a 4-53T Martin?
That is why the 1982 6.2's were red, and not alpine blue.
Martin
Martin
There's also the P 400 block that's slightly better than the optimizer ( no personal experience here).
The 6.5 is probably the most improved engine out there. Over its life, mostly after gm, seems like all the problems were addressed ,its a serious engine now with very few problems.
The 6.5 is probably the most improved engine out there. Over its life, mostly after gm, seems like all the problems were addressed ,its a serious engine now with very few problems.
Yep with the optimizer price mine as well swap a Cummins
I keep watching the gov surplus sites. Have seen one or two optimizer cone up for sale.........in like 5 years lol
I think the largest confusion comes from the fact that GM advertised it as a "Detroit Diesel." If they hadn't done that I don't think this issue would have happened.
So...blame GM's marketing team?
It is amazing how clean and pristine everything in the adverts is. I'd love to have such a clean rig (although I clearly don't want it badly enough to put in the work
).
So I have a 2000 OBS with the 6.5
Is that this optimizer I've been hearing about?
Is that this optimizer I've been hearing about?
So the improved block is the best that could possibly be in it?
Sorry, I'm a crayon eater. I don't read much.
Sorry, I'm a crayon eater. I don't read much.
That is literally the ONLY ad I have ever seen that says that. I can find 50 pieces of GM literature that do not call it a Detroit Diesel.
Martin
Martin
