Competition Duramax engine issues

[Turbo Tim 1]

There's something to be said about grammar and spelling. When you can master that, I'm sure more people will listen to you.

Again Comp you should listen to this information, get off the net and go take some night courses at the local elementary school :-laf

 

[John_P]

Devan Manis:



Great point on the similarity of the fuel systems between the Dodge CTD CR and the Duramax!



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Quote by COMP 461:



"The power loss in a diesel is significant. There is a way to overcome this... ... .

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Yeah Greg,... ... and I know "what that WAY is to overcome the "losses!"

Pour the coals to it with a nice BIG shot of nitrous, Right??? What I would REALLY like you to do when GBE finally lets you drive that drag truck, is make a pass on JUST #2 diesel!! No NOS!! What do you say?? I don't believe (and I would like you to correct me if I am wrong) is that you EVER made a pass in the "Dr. Performance Truck" WITHOUT NOS did you??? If you did, can you tell myself and the TDR Members what your 1/4 mile times were??

I KNOW old Gale is NOT going to let that Duramax get on a drag strip anywhere while it is spewing a bunch of "locomotive black" diesel smoke, is he? :-laf Old Gale doesn't want to ruin his image and "lose face" by having a truck that "can make BIG POWER WITH ALOT OF BLACK SMOKE!" :-laf He says you can have "BIG POWER WITH NO SMOKE!"



When you ran and won against Keatings Truck in Beech Bend you need to remember that he was and STILL IS on #2 diesel alone! I know you are against the heavy black smoke, as you told me as much in our conversations! But there are only a few ways to eliminate that smoke and adding NOS, ALOT of NOS will do it! You and I both know that.



Here is a little "news flash" for you too. The top running "production type"

pickup trucks (with lowest 1/4 mile E. T. s) right now on the DHRA/NHDRA

circuit are running CUMMINS TWELVE VALVE (12valve) ENGINES with P-7100 or related type mechanical fuel pumps!! That INCLUDES your old ride; the tubular chassis "Dr. Performance Truck!" I am NOT saying power cannot be made with the Duramaxes, the Dodge CTD CR or even the Ford PSD. Their time is coming and the E. T. 's seem to be getting lower every year. BUT,..... right now, the "kings" on DHRA/NHDRA are running what I said above.



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John_P

 

[RacinDuallie]

Be careful what you say- silo's are loaded and armed

Tell the truth... ..... The truth will set ye free... ... .

There are several of us out there that happen to know of "inside information" on this camp... . And this info was gathered from multiple - veeeeeery credible- sources; one of these sources is with someone very closely related to YOU, Comp... . and this Duramax truck... ... The rest was gathered from- again - very credible people with high integrity... .....

Again- the T R U T H will set ye free... ... ... .

 

[nwpadmax]

which brings up the question, why does only the duramax have these capabilities, last i checked its the same injection system.

Same injection system, yes. Same computer? No.



Until someone cracks the CR Cummins computer, you're kinda stuck.



Something equivalent to EFILive for the 6. 7 Cummins would sure attract a lot of attention!

 

[COMP461]

I would say that there is no difference in Nitrous on my old truck, and a second turbo on Keatings truck.



RD you should worry about you on ride, you have a very steep learning curve. I would say you have a lot of work ahead of you , to be pecking on a keyboard. I have a history of making my predictions come true. You still have a competition License to earn.

Enough of this secret squirrel crap , with a decoder ring lingo, from you , until you put a few laps on the board , and prove your self , your irreverent .



All I see is a lot of people that have no dog in this hunt pecking on keyboards, and haven’t a clue to the truth. I have seen the future , and its going to be nothing but down hill for the old school people that will not , or can not, move on to the new technology.



I call it like I see it , GBE doesn’t need to copy , they leads the way

 

[RacinDuallie]

I would say that there is no difference in Nitrous on my old truck, and a second turbo on Keatings truck.

RD you should worry about you on ride, you have a very steep learning curve. I would say you have a lot of work ahead of you , to be pecking on a keyboard. I have a history of making my predictions come true. You still have a competition License to earn.
Enough of this secret squirrel crap , with a decoder ring lingo, from you , until you put a few laps on the board , and prove your self , your irreverent .

All I see is a lot of people that have no dog in this hunt pecking on keyboards, and haven’t a clue to the truth. I have seen the future , and its going to be nothing but down hill for the old school people that will not , or can not, move on to the new technology.

I call it like I see it , GBE doesn’t need to copy , they leads the way

My dog is fine. Atleast its my dog!. . . . . . And you can keep wondering about my on track experiences- you DON'T know me, or how many times I've been down the track.


You can be sure I don't need to call people to ask em how to spool Project X and bracket race it..... Yeah... . I heard about that phone call of yours... . I won't reveal the recipient of that call of yours with this request.

I also heard about many of your inquiries on the phone, to many different people.

Also you can wonder all you want bout my as you call it-"learning curve" .....

Trust me boy you don't want to fire me up with all my factual knowledge on certain subjects... ..... trust me...



And please tell me- on what dragstrip has GBE 'led the way?'

 

[Yo Hoot]

Duramax blocks are too weak for the long term. They are too sensitive to tuning "miscalculations".



This is a fact jack.



You may get a high hp Dmax but you won't have it for long :-laf

 

[Devan Manis]

Same injection system, yes. Same computer? No.



Until someone cracks the CR Cummins computer, you're kinda stuck.



Something equivalent to EFILive for the 6. 7 Cummins would sure attract a lot of attention!

really? I was terribly unaware of that minor fact.

 

[nwpadmax]

Oh Hoot, I see you're still on your lifelong journey of running off at the mouth.



The Dmaxes that have failed recently were due to other component failures, and had nothing to do with the blocks themselves.



Or can't you read?

 

[zstroken]

Or can't you read?

Easy Matt :-laf , Kind of ironic typing to a person asking them if they can read. Like asking a liar if he is telling the truth. LOL My latest visit to the DieselPlace seemed that some may be feeling pilot injection is contributing to the piston failures? Or did I not read far enough?

 

[fest3er]

Pilot injection shouldn't put enough fuel in the cylinder to crack a piston. I think they were far too aggressive with the injection timing and were on the ragged edge where a sneeze could make the injection early enough to overpressure the cylinder. Remember, the big difference between the Cummins and the Duramax is the Cummins fires every 120 degrees, while the Duramax fires every 90 degrees. 90* greatly increases the possibility of one piston powering the next compressing piston through a too-early ignition event.

 

[zstroken]

I just read bits of it, but it seemed like they are advancing the main injection even enough that the heat left from the pilot was a little hotter than they wanted and seemed light it a little sooner than necessary.

 

[nwpadmax]

Well, one of the things in play there with the one truck was pilot injection with huge sticks. It was not said how long the pilot pulse was, but it could have delivered way more than expected, at an earlier time than it should have been.



Having all that fuel is uncharted territory and the first visitors there have learned the hard way.



Live and learn.

 

[COMP461]

Kind of neat to have the most advanced diesel Dyno facility in the country , where you can plot cylinder pressure every tenth of a degree of crank rotation, doing this for every cylinder for and entire test session.

This advanced facilitys allows you to absolutely engineer the best product possible and not just guess on the resultant effects of a given Horse power level on a less engineered product.



Reckless Power is easy to make but totally engineered, safe, reliable power for the long haul is a little more involved process. This advanced engineering capacity also allows you to make tuning decisions with absolute certainty on a maximum effort diesel drag racing power plant.

 

[nwpadmax]

Comp, will the sales pitch continue as long as that thing's not on the track?



When's the maiden voyage?

 

[RacinDuallie]

Onepredictionamongmanythaticanrecallthatneverhappened...

Comp, will the sales pitch continue as long as that thing's not on the track?

When's the maiden voyage?

Why,according to a 'prediction' that was to happen on Dec 5th, of this year.....

But that prediction, among others never happened... ...

 

[Yo Hoot]

Oh Hoot, I see you're still on your lifelong journey of running off at the mouth.



The Dmaxes that have failed recently were due to other component failures, and had nothing to do with the blocks themselves.



Or can't you read?

Oh component failures too



Trust me :-laf GM even redisigned the block to add strength because of failures in their own testing.



The writing is on the wall. Without major block modifications to structurally strengthen it, it has hit its mechanical limits... below what the Cummins has proven over and over again.

 

[nwpadmax]

Hoot, no one really cares what your prognostications are. Don't you get tired of just being a talking head? If you actually competed in something, then you might get some respect, but it seems you'd rather tool around town tooting your choo choo horns... . like an extension of your pie hole. How fitting.



And the funny thing is, I agree with you. There are lots of things about the Cummins that I appreciate and respect (like the strength of the design). If I had the money, I'd have one from each of the manufacturers. I'd love to have a common rail Cummins that could spin 5000 rpm and be programmed like a Dmax. That would make one holy terror of a pulling truck... . one that could make me jump ship.



The Dmax crowd isn't giving up any time soon, we'll work through each issue and move on just like the Cummins guys did years ago.

 

[nwpadmax]

Why,according to a 'prediction' that was to happen on Dec 5th, of this year.....



But that prediction, among others never happened... ...

Either way, what's the new track date, Comp?



Cut the jibba jabba and go get some time slips.

 

[JasonCzerak]

Kind of neat to have the most advanced diesel Dyno facility in the country , where you can plot cylinder pressure every tenth of a degree of crank rotation, doing this for every cylinder for and entire test session.

This advanced facilitys allows you to absolutely engineer the best product possible and not just guess on the resultant effects of a given Horse power level on a less engineered product.



Reckless Power is easy to make but totally engineered, safe, reliable power for the long haul is a little more involved process. This advanced engineering capacity also allows you to make tuning decisions with absolute certainty on a maximum effort diesel drag racing power plant.

Are you still talking?