MP8 EGR & DEF Delete ???

[little puppy 5]

Have any of you done a full DELETE on your  MP8? I'm thinking about a full Delete and ecmc tuning? Any one done this ? Happy results?  Thanks. 

[steeler 19]

I've talked to a few owners that have done it and are happy.

There are downsides to it though. For example I just finished working on a KW with a Paccar engine that was deleted. Guy had taken it to a dealer who refused to work on it because it was deleted. Turned out the ecm was fried. We got him a new ecm, but our local dealer would obviously only program it with the factory program. This guy is from out of town, and the company that deleted it for him is 1200 miles away, and out of business.

So, he will have to find somebody to put his delete software back in it. In the meantime though, his truck will progressively derate. 

[little puppy 5]

That would really suck

 

[Mackpro 385]

If I was doing long distance work I wouldn’t just for the reason Steeler said. All the guys around here running deleted Mack’s and Volvo’s stay with in 100 miles of home. 

[Mackpro 385]

While I have been a proponent of deleting in the past I would like to change my opinion. I was talking to some of my former coworkers yesterday and they are starting to see a serious problem.  They have had 3 trucks with deleted MP8 engines that have had intake and exhaust valves crack and break and pieces and go through the turbo. They are not dropping the valve  just a piece breaks off. Mileage varies from 220,000 to 450,000. I have seen them drop valves due to broken valve springs on 800,000 mile engines but this is totally different failure. My thoughts are to delete the DPF and DEF systems and keep the EGR . 

[little puppy 5]

Wonder what would cause them to just break like that? 

 

[JoeH 312]

4 hours ago, Mackpro said:

While I have been a proponent of deleting in the past I would like to change my opinion. I was talking to some of my former coworkers yesterday and they are starting to see a serious problem.  They have had 3 trucks with deleted MP8 engines that have had intake and exhaust valves crack and break and pieces and go through the turbo. They are not dropping the valve  just a piece breaks off. Mileage varies from 220,000 to 450,000. I have seen them drop valves due to broken valve springs on 800,000 mile engines but this is totally different failure. My thoughts are to delete the DPF and DEF systems and keep the EGR . 

I wonder if these trucks had pyrometers or drivers that knew how to read a pyrometer. Trucks fuel map was probably tweaked, putting out a wider power band and more power.  Exhaust systems are designed to be most efficient at a very narrow rpm band. Modern ones are also designed for all that Regen crap. If you're going to delete it and remap the fuel, you have to get the heat out of those heads! You have to redesign the exhaust. Ideal is basically just straight piped.

[JoeH 312]

And if a cop sees a new engine straight piped he's going to wonder where the immisions parts are

[RobM626 41]

11 hours ago, JoeH said:

I wonder if these trucks had pyrometers or drivers that knew how to read a pyrometer. Trucks fuel map was probably tweaked, putting out a wider power band and more power.  Exhaust systems are designed to be most efficient at a very narrow rpm band. Modern ones are also designed for all that Regen crap. If you're going to delete it and remap the fuel, you have to get the heat out of those heads! You have to redesign the exhaust. Ideal is basically just straight piped.

A bad tune definitely a possibility

[6368 213]

Does volvo sell their engines without emissions equipment in areas that don't require it?  In other words how are the export Macks set up?  I have heard some areas of the world you can't even get low sulfur fuel. 

[fjh 561]

19 hours ago, Mackpro said:

While I have been a proponent of deleting in the past I would like to change my opinion. I was talking to some of my former coworkers yesterday and they are starting to see a serious problem.  They have had 3 trucks with deleted MP8 engines that have had intake and exhaust valves crack and break and pieces and go through the turbo. They are not dropping the valve  just a piece breaks off. Mileage varies from 220,000 to 450,000. I have seen them drop valves due to broken valve springs on 800,000 mile engines but this is totally different failure. My thoughts are to delete the DPF and DEF systems and keep the EGR . 

Bud I wouldn't be so sure that is the cause! We have had the odd engine with pieces fall out of the valve with the emissions in tact ! That said I have seen a few cummins  ISX guys loose heads due to cracking  after a delete ! how ever that inlcuded a horse power upgrade so Who Knows!

[fjh 561]

1 hour ago, 6368 said:

Does volvo sell their engines without emissions equipment in areas that don't require it?  In other words how are the export Macks set up?  I have heard some areas of the world you can't even get low sulfur fuel. 

Yup the army has lots! They don't care if Our Houses Burn down thou Fire departments aren"t exempt from This stuff!  😡

[Mackpro 385]

We had a few export MP8’s pass through heading south to catch a boat to South America. I took a lot of pics and I think I posted them here. No egr and plain old school exhaust manifold with a regular old turbo on it. They did have the big exhaust brake thing behind the turbo that Volvo used to put on their D12 engines. 

[terry 383]

1 hour ago, Mackpro said:

We had a few export MP8’s pass through heading south to catch a boat to South America. I took a lot of pics and I think I posted them here. No egr and plain old school exhaust manifold with a regular old turbo on it. They did have the big exhaust brake thing behind the turbo that Volvo used to put on their D12 engines. 

To bad a guy can't snag one of them to use!    terry

[Mack Technician 1,124]

3 hours ago, Mackpro said:

We had a few export MP8’s pass through heading south to catch a boat to South America. I took a lot of pics and I think I posted them here. No egr and plain old school exhaust manifold with a regular old turbo on it. They did have the big exhaust brake thing behind the turbo that Volvo used to put on their D12 engines. 

They are doing it to VOE (volvo off-road equipment) also. For the sale to a non-conforming country they will install a strip-it kit and software package. To have it done you need to have your bill of sale, port-of-call paperwork, etc, all in order. There is one specific group doing all conversion work. It's a captured, factory, procedure.   

[steeler 19]

11 hours ago, fjh said:

Yup the army has lots! They don't care if Our Houses Burn down thou Fire departments aren"t exempt from This stuff!  😡

Oh ya, I could see a fire truck on the way to a fire then going into a 5mph def derate!

[Bullheaded 443]

Well my cities airport bought a brand new million dollar airport rescue fire truck and they still have to use the old one because the new one is always down with emission system issues and codes.

[41chevy 9,806]

Never thought the emergency vehicles would not be exempt!  Boy that's a disaster waiting to happen.Responding to a plane crash and go into derate.

[fjh 561]

1 hour ago, 41chevy said:

Never thought the emergency vehicles would not be exempt!  Boy that's a disaster waiting to happen.Responding to a plane crash and go into derate.

Yup

[Rockwell 15]

As far as I'm aware and have heard, through no qualified source, emergency vehicles do not derate. Yes you get all the same warnings and Mils, but no derate. 

It is my understanding, they aren't exempt from emissions, but they are exempt from derate. 

[Outbehindthebarn 405]

21 hours ago, Mackpro said:

We had a few export MP8’s pass through heading south to catch a boat to South America. I took a lot of pics and I think I posted them here. No egr and plain old school exhaust manifold with a regular old turbo on it. They did have the big exhaust brake thing behind the turbo that Volvo used to put on their D12 engines. 

How long ago was that? In Brazil at least, they are running DPF's on all new trucks.... Lots of Volvo there, but no Macks... Macks are found in Chile and elsewhere. 

[Mackpro 385]

4 hours ago, Outbehindthebarn said:

How long ago was that? In Brazil at least, they are running DPF's on all new trucks.... Lots of Volvo there, but no Macks... Macks are found in Chile and elsewhere. 

The truck was in our shop in March of 2016. It was a MP8 325 horsepower. I believe the biggest you could get on a export MP8 was 440

Edited January 25 by Mackpro

[little puppy 5]

Interesting info,  wonder where one would find a reliable and trustworthy tuner ?😁

[mp8_macky 8]

The mentioned problems of cracking exhaust is because of excessive heating.

The issues could be that they didn't drill the DPF DOC SCR filter, or the filter has collapsed - all this would result with an exhaust restrictions. You are supposed to put a 5inch hole in the center of filter, and my tuner recommends fitting a pipe in that hole(to fit tight) so the filter does not collapse.
I've done more than 500.000 miles with my deleted MP8 - and never had a problem like that!
The tuner I use is https://truckecmtunes.com