injectors = broken crank ?

[othrgrl]

All I'm saying is there is a point where it becomes expected and I think between the Cummins and the Max one has an advantage. You don't read nearly as much about catastrophic engine failures on the Cummins side until you see 700+ stock and 1000+hp with the modded internals. Again, as I stated earlier, if you are going to try beefing the engine up mechanically it makes a lot more sense to do it to one that's easier to work on because you EXPECT to be working on it.

So which one are you saying has the advantage? I know of Dodges that have windowed the block at lower power levels than you mention. There are 3 stock LB7s with ALOT of hard miles in the very low 11s - Trent Nell, Matt Handwork, and Russell Hilton. That means they are making about the same power I am, 800+. They are all expecting something to let go to give them an excuse to build - but Matt and Russell have been pushing them like that for a couple seasons now, with no "luck". The Dmax that spurred this thread was running low 10s in a 7200 lbs truck, so I would have to say he is easily over 1,000 hp. Guess that pretty much makes things look even if you ask me.

My reason for not choosing a Cummins is that I don't know many at my level that are still doing it all with their trucks - most choose to be pullers or racers early on and run with it, setting their trucks up to only do that and sometimes they will still daily drive it. I know of a good number of Duramax's that will run low 11s, daily drive, tow heavy loads, and sled pull. Most events I go to (race or sled pull) the Dodges in my class are trailered in while the Duramax's are driven or even pulling trailers in. I have seen some high hp dyno queen Dodges that were still daily driven. I'm also not a fan of stacking random programmers and modules to see which one makes the most power - I would rather plug in my laptop and give my truck whatever it needs more of.

 

[Big Block 88]

SO Hoot are you not remembering the 53 block from the cummins? You know the ones that windowed at stock power levels.

I think the Cummins and D-Max are neck n neck in there abilities. Both are just as reliable as the other. There will always be lemons on each side. But to say the Cummins is mor reliable at big power levels is non sence.

 

[Trippin]

It would seem that any engine that has 2 main bearings supporting each rod would have the strength advantage over an engine that had 2 main bearings supporting 2 rods.

 

[Slick]

The Cummins bottom end is stronger. End of story. But, the Dmax has some advantages over the Cummins in the power making dept. Custom tuning, better heads, displacement(over the 5.9 anyway), etc...

 

[hoot]

For me... and that's just me. Simplicity of the design is very high in my book. It's one of the biggest reasons I am where I am. We can remember lots of things. 53 block on the Cummins, injectors on the Dmax... and I still think Dmax more susceptible to head gasket failure than a Cummins.

I recently read that the newer 6.7 Cummins have a ECM lock in them so you can't use a downloader. I wonder if they will be able to crack that one.

 

[paint94979]

For me... and that's just me. Simplicity of the design is very high in my book. It's one of the biggest reasons I am where I am. We can remember lots of things. 53 block on the Cummins, injectors on the Dmax... and I still think Dmax more susceptible to head gasket failure than a Cummins.

I recently read that the newer 6.7 Cummins have a ECM lock in them so you can't use a downloader. I wonder if they will be able to crack that one.

You have got to be joking about this right?... Cummin's blow head gaskets on the regular... it is very rare to see a Duramax blow head gaskets. build your trans, get some twins, add a tune... and what do you know 650-700hp and in most cases stock head bolts.... every Cummins owner I know has head studs. they all add them once they go over a certain point.... most being 400hp+. Your statement is ridiculous

 

[othrgrl]

You have got to be joking about this right?... Cummin's blow head gaskets on the regular... it is very rare to see a Duramax blow head gaskets. build your trans, get some twins, add a tune... and what do you know 650-700hp and in most cases stock head bolts.... every Cummins owner I know has head studs. they all add them once they go over a certain point.... most being 400hp+. Your statement is ridiculous

I have to agree here, I have seen quite a few trucks running 50ish PSI on stock head bolts without failure, my stock motor included.

 

[McRat]

Casper's original stock engine saw up to 59 psig with no leaks. Stock untouched headbolts. Cummins usually have lots of problems at that level.

The Duramax engine design has a lot going for it. Roller cam, more port area, V8, light weight, etc.

 

[hoot]

The Cummins guys that go higher always have studs and/or rings. The longer head means you do have to have good clamping. I have the studs only. Many of you know I blew a headgasket on my 2001 Dmax. On my Cummins my boost gauge tops at 40 psi because it's picking up off the stock sensor. I peg it all the time. I have a bunch of performance gauges I need to install to see the real reading but haven't had the time to install them. I'd bet I'm easy hitting 50+ boost on the hard run. I'm at 84,000 miles now.

 

[JoshH]

What's your point? You have studs. I also had a stock headbolt engine that ran 50-55 lbs of boost with no headgasket failure.

 

[Slick]

01's have always had HG issues. They redesigned the gaskets after the first year. You can look at an 01 gasket compared to another year and see the difference plain as day.

 

[othrgrl]

For me... and that's just me. Simplicity of the design is very high in my book. It's one of the biggest reasons I am where I am.

So what you are saying is:

Unfortunatly for Dodge, Geico has trademarked the slogan.

 

[KEVINL]

the only problems with the cummins is the truck its bolted in and the limited tunability factor

The cummins is a much stronger motor

 

[TrentNell]

the only problems with the cummins is the truck its bolted in and the limited tunability factor

The cummins is a much stronger motor

just a FYI a common rail lunched his motor 3 weeks ago at our local track with less HP than i am running .

 

[Big Block 88]

is . 53 block on the Cummins, injectors on the Dmax... and I still think Dmax more susceptible to head gasket failure than a Cummins.

.

I would rather have a bad injector than a windowed block.


In red:spit::rofl::rofl::rofl::rofl::rofl:

 

[hoot]

True but you are talking only 1998-2001 years that had the 53 block. The Dmax block is pretty much the same. The Cummins blocks are changed. Looky here..

This ain't no 53 block. It's not a Cummins either. You can still see the hatching in the cylinders. That's good!

But seriously we can dig up pictures PSD's and Cummins with catastrophic failures. I'm just pokin at you guys. I agree the Dmax is a great motor and does do really well with power mods. Simple proven fact. It's more a matter of what you like to work on and drive.

 

[duratothemax]

True but you are talking only 1998-2001 years that had the 53 block. The Dmax block is pretty much the same. The Cummins blocks are changed. Looky here..

This ain't no 53 block. It's not a Cummins either. You can still see the hatching in the cylinders. That's good!

But seriously we can dig up pictures PSD's and Cummins with catastrophic failures. I'm just pokin at you guys. I agree the Dmax is a great motor and does do really well with power mods. Simple proven fact. It's more a matter of what you like to work on and drive.

damn hoot, flexplate, sticks, big turbo, headstuds, etc... all for 541hp? Id say you got your moneys worth.

 

[othrgrl]

damn hoot, flexplate, sticks, big turbo, headstuds, etc... all for 541hp? Id say you got your moneys worth.

I think the big part is pretty questionable, I don't know of too many duramax owners that "upgrade" to that small of a turbo. I do know of Duramax's with stock head bolts, stock turbos, stock injectors, and stock CP3s that have put down more power and I'm sure run much faster times. But hey, his is easier to work on and (since he plans on doing a lot more wrench time to keep up with what a laptop can do for a Duramax) that works for him.:spit: Seriously though I can't argue that the Cummins has a strong bottom end.

 

[hoot]

Did I say big turbo? I built mine for a conservative power level with longevity in mind. I'm sure I could get another 50 hp out of it with some tweeking. Lately I just pretty much just been driving it.

 

[duratothemax]

Did I say big turbo? I built mine for a conservative power level with longevity in mind.

well whatever, its not a stock one. The point Im making is you spent $$$$ on an aftermarket turbo to make what we can easilly do on a stock one.

And dont give me "well phil-bob over on DTR made 750rwhp with a stock one so it can be done, I just wanted lower egt's blah blah blah", the fact is you have a decent amount of money in a turbo upgrade and headstuds to the tune of 541rwhp, that we can do for free.

I'm sure I could get another 50 hp out of it with some tweeking. Lately I just pretty much just been driving it.

spoken like a true bench/internet racer. :

ben