Once again you are talking about engines that were designed to run boost and running it at the levels they are suppose to. I have only broken in 2 new diesel engines. I ran them at the boost they were set from the factory with no problems. The rebuild I had was from DC and I have found them to have poor QC. So that is where I layed the blame. The mechanic thought that the 50% increase in boost on break in could have had something to do with it. So I thought I would share in case he wanted to be overly cautious. Wyo has been on my case all this time thinking I am trying to compare a Suzuki 2-stroke to a diesel. Which I was not. Now you are trying to compare the two. So maybe you and Wyo should argue about this one. I am going to quit arguing this point because people are reading to much into what I am actually typing.
Break In Procedure???
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Once again you are talking about engines that were designed to run boost and running it at the levels they are suppose to. I have only broken in 2 new diesel engines. I ran them at the boost they were set from the factory with no problems. The rebuild I had was from DC and I have found them to have poor QC. So that is where I layed the blame. The mechanic thought that the 50% increase in boost on break in could have had something to do with it. So I thought I would share in case he wanted to be overly cautious. Wyo has been on my case all this time thinking I am trying to compare a Suzuki 2-stroke to a diesel. Which I was not. Now you are trying to compare the two. So maybe you and Wyo should argue about this one. I am going to quit arguing this point because people are reading to much into what I am actually typing.
you are the one who bought in the diesel engine to help make your case, so it's still points back at you.
Thats just it I havent argued the diesel, just the 2 stroke, if you want to argue the diesel I can do that too. Dimitri Millard has broke in diesels on a dyno turning over 1000hp at the rear wheels on a break in map and they lived, how much boost does that require (and twin turbos), sounds like your mechanic gave you a line to get you off his back. He would be fired IMO
Actually I brought it up to back my mechanics case. Where did I say the two compare? The point was I gave my pickup extra pressure. It just happens to be a diesel. Wyo wanted my source. I gave it to him with an explaination because I knew that would be the next post. First his arguement was that the extra pressure helps seat the rings. Then he said a diesel has too much pressure to compare. Now he is saying the extra pressure doesn't matter. The only reason I kept arguing the point is because he kept making up things to back his case. If someone is going to throw numbers out they better be able to back them up. Aparently all the back and forth about my diesel engine made people think I was trying to compare the two.
Let me try to make this clear. I had a diesel mechanic (that isn't as smart as wyo and should be fired) tell me "pressure above the levels that the engine was designed could make it harder for rings to seat". I would love to see someone try to disprove this. Like I said I am not arguing that engines can be broken in on boost. I have done it and seen and heard about others doing it, but that doesn't mean it is better. How does saying someone made a ton of hp mean their rings are seated as good as possible? My pickup ran fine. It just drank a gallon of oil every 2000mi. In fact if I remember correctly oil ignites at a lower temp than diesel. So that could advance the timing of combustion and gain some power.
mattymac does bring up a good point that a person at 10,000' would need almost 6psi to have the same air density.
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let me spell it out,
1 there are plenty out there that boost from day one on new engines and everything is just fine.
2 compression is what seats the rings or we would be spinning them with a machine with the plugs out, but anyone that has built a motor knows rings do not push hard enough on there own to seat.
3 If not built right your going to have problems on any mod motor
4 Don't be a fool when breaking something in and go way above the base hp the engine is designed to make.
5 if you did not overbuild your diesel maybe you should have turned it down on break in
6 There are some oils out there that can slow down break in
7 if done right rings will seat in as little as 20-30miles and the faster you seat them the more likely they are to seat better and last longer.
So unless your diesel was balanced, blueprinted and gone through every last little check by a reputable builder, not just some mechanic. Then you prob shouldn't run it at twice the normal boost level on break in.
Your trying to argue with the statement "my mechanic said so" well I'm a mechanic too and know plenty of them that will tell a customer what ever it takes, they have even told me the same kind of bs. I am not an expert at everything and assume people use a little not so common, common sense.
If your diesel is a ford, then it failed before you started it so your mechanic has every right to say what ever it takes.
One last thing, I also stated not to go full throttle meaning it would be very hard to hit max boost,
http://www.mototuneusa.com/break_in_secrets.htm
1 there are plenty out there that boost from day one on new engines and everything is just fine.
2 compression is what seats the rings or we would be spinning them with a machine with the plugs out, but anyone that has built a motor knows rings do not push hard enough on there own to seat.
3 If not built right your going to have problems on any mod motor
4 Don't be a fool when breaking something in and go way above the base hp the engine is designed to make.
5 if you did not overbuild your diesel maybe you should have turned it down on break in
6 There are some oils out there that can slow down break in
7 if done right rings will seat in as little as 20-30miles and the faster you seat them the more likely they are to seat better and last longer.
So unless your diesel was balanced, blueprinted and gone through every last little check by a reputable builder, not just some mechanic. Then you prob shouldn't run it at twice the normal boost level on break in.
Your trying to argue with the statement "my mechanic said so" well I'm a mechanic too and know plenty of them that will tell a customer what ever it takes, they have even told me the same kind of bs. I am not an expert at everything and assume people use a little not so common, common sense.
If your diesel is a ford, then it failed before you started it so your mechanic has every right to say what ever it takes.
One last thing, I also stated not to go full throttle meaning it would be very hard to hit max boost,
http://www.mototuneusa.com/break_in_secrets.htm
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That would be my guess as to the brand as well, probably a 6.0L
Wyo, I thought you were right on point on your first post. I am getting tired of typing the same thing over and over. So I will leave it at that. Its a Cummins by the way, but like I said I have had nothing but problems with their warranty side of things.
If its a cummins then fire the mechanic, they will handle it if built right.
Honestly we don't care, Just giving you a hard time. I have stated it many times also, don't be fool and rod it right away, run it in a safe zone with the right amount of fuel for a bit then let her rip and tune it in.
But I would still be looking for a mechanic that can build a motor so they don't have to make excuses,
only time I have had that happen is when I used this 1 certain oil additive, its to slick to seat anything and great after break in but it will screw if you run it before.
Honestly we don't care, Just giving you a hard time. I have stated it many times also, don't be fool and rod it right away, run it in a safe zone with the right amount of fuel for a bit then let her rip and tune it in.
But I would still be looking for a mechanic that can build a motor so they don't have to make excuses,
only time I have had that happen is when I used this 1 certain oil additive, its to slick to seat anything and great after break in but it will screw if you run it before.
Nothing to do with the mechanic. It was a warranty motor from Chrysler. All he did was put it in.
So you had it turned up and they warrantied it, what failed on the first one, btw, most of those type of mechanics don't have a clue, so telling you must be to much boost is a complete guess/ excuse. and oil does not burn faster than diesel.
It was a 5.9cr with 3 inj that were out of spec. No extra rail pressure by the way. To boring, and to much typing to go into detail. If I made it sound like he thinks engines can't break in on boost I didn't mean to. My engine was ran hard and hot on conventional oil, but was still burning oil.
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