6.7L Cummins Swap [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: 6.7L Cummins Swap


Dudgy
12-05-2009, 04:06 AM
Okay guys, i was wondering if anybody has done a 6.7L Cummins swap into one of these 07.5+ chevy/gmc trucks. Engine to trans adapter is 795bux at destroked, that's about all you need and some new motormounts to drop it in, and maybe a different starter. The only tricky part would be the computer. How would the 6.7L computer work together with the truck's computer?

If anyone knows where to find more info about this, or if someone on this forum has done this, i'd love to get more info about it. These new chevy's are nice, but i absolutely LOVE my 6.7L Cummins. It would sure be a unique truck.

Thanks!

Horsehaulin
12-05-2009, 07:24 AM
Getting a stand alone ECM to talk to the Allison TCM is going to be your biggest hurdle. Get ahold of Dan (Destroked) and see what he says, maybe he already has it worked out?

Moved to Frankenstein.

Dudgy
12-05-2009, 11:24 AM
Well it has been done already, mounting a 5speed allison behind the 6.7L. I will talk to the guys at Destroked and see what they can tell me.

Thanks for moving it, i couldn't find a conversion/swap section.

screamin seeman
12-05-2009, 12:36 PM
I'm swapping a 6.7 and a straight axle in an 09 as we speak. The adapter and flex plate is $1420 from Scott at destroked. You will need a Smarty to take care of the Cummins VATS as well as an Allison controller from Destroked. If your using the trucks 6-speed, you will need to swap in 5-speed valve body to use the destroked controller. I currently have motor mounts available for that swap. Check out the video on Scott's home page. He has a 6.7 running in one of my engine test stands.

http://www.destroked.com/

Dudgy
12-05-2009, 02:18 PM
Hey Awesome man!
Do you have a build thread? I want to follow it, cuz i'm very interested in doing this. Also the straight axle will have to be done eventually. Smarty S67 is no problem, have had one of them already on this truck and can get one anywhere. Good programmer.

Thanks!

01Duramax6spd
12-05-2009, 09:14 PM
Pic's of 95 GMC please :D.

Okay guys, i was wondering if anybody has done a 6.7L Cummins swap into one of these 07.5+ chevy/gmc trucks. Engine to trans adapter is 795bux at destroked, that's about all you need and some new motormounts to drop it in, and maybe a different starter. The only tricky part would be the computer. How would the 6.7L computer work together with the truck's computer?

If anyone knows where to find more info about this, or if someone on this forum has done this, i'd love to get more info about it. These new chevy's are nice, but i absolutely LOVE my 6.7L Cummins. It would sure be a unique truck.

Thanks!

Dudgy
12-05-2009, 09:16 PM
Pic's of 95 GMC please :D.
Haha, like it says it's still a project. It's just sitting in my shop right now until i find a front axle, engine, and tranny. Don't worry, once i start cutting and welding there will be a build thread haha

01Duramax6spd
12-05-2009, 09:24 PM
I have an axle but shipping would get ya. Have 79Ford HP D60 and GM kingpin D60's too :D.
One of these days I want to do a 6door D-Max with a solid axle just for a hunting truck when we all load up and head for elk camp.

Haha, like it says it's still a project. It's just sitting in my shop right now until i find a front axle, engine, and tranny. Don't worry, once i start cutting and welding there will be a build thread haha

Dudgy
12-05-2009, 09:26 PM
Ya as soon as i find an axle i'll start building my control arms and what not. But i don't think much will happen until spring/summer cuz this winter seems to be getting pretty busy in the oilpatch.

screamin seeman
12-05-2009, 10:16 PM
I have an axle but shipping would get ya. Have 79Ford HP D60 and GM kingpin D60's too :D.
One of these days I want to do a 6door D-Max with a solid axle just for a hunting truck when we all load up and head for elk camp.
How much do you need for the ford 60?

01Duramax6spd
12-05-2009, 10:48 PM
$1400 it's clean and nice inside. I think it's been rebuilt somewhere along the way.

How much do you need for the ford 60?

skyhigh4by
12-09-2009, 02:33 AM
OK I dont want to start anything but I have to ask. For quite sometime I heard nothing but crap about the cummins 6.7. Why would you want to scrap the DMax for that? The Dmax is proving to be a great motor and has the ability to make all the power you could want. If I HAD to take my DMax out I think I would sadly put a Pstroke 6.4 in there before the 6.7. But dont listen to me cause Im not really a fan of the Allison that much either. Its week and I dont really care for de-fueling between shifts either.

screamin seeman
12-09-2009, 02:43 AM
What issues are you referring to? The DPF and VGT? The 6.7 is a higher displacement version of the 5.9 common rail. 86 the emissions and VGT and you have yourself a very nice power plant.

Dudgy
12-09-2009, 07:03 PM
OK I dont want to start anything but I have to ask. For quite sometime I heard nothing but crap about the cummins 6.7. Why would you want to scrap the DMax for that? The Dmax is proving to be a great motor and has the ability to make all the power you could want. If I HAD to take my DMax out I think I would sadly put a Pstroke 6.4 in there before the 6.7. But dont listen to me cause Im not really a fan of the Allison that much either. Its week and I dont really care for de-fueling between shifts either.
Yup there's your problem, you HEARD nothing but crap. You don't have any experience. I DO, and lots of it. I love my 6.7L, i love it way more than the 5.9L, does that say something to you? It's the same block as a 5.9, but bored out to 6.7Liters. SAME engine. No replacement for displacement. These engines are torque monsters man, it's crazy.

Goin to a LMM or 6.4L is big time downgrading in MY OPINION. Other people might like the chevy or ford engines better, i don't. Inline 6 is the only thing i wanna be running in a truck like this.

nekkidhillbilly
12-09-2009, 09:08 PM
6.7 is a great motor

skyhigh4by
12-10-2009, 12:44 AM
So you like the cummins but not the dodge?

Fair enough.....

Dudgy
12-10-2009, 01:11 AM
So you like the cummins but not the dodge?

Fair enough.....
I like the Dodge too, sweet looking truck. I haven't driven a LMM chevy yet, so dunno what they're like. The chevy's look nice too, interior as well, but that IFS has got to go. Even a Dodge with Carli suspension rides nicer than IFS, and that's with a solid axle.

DURAtotheMAX
12-10-2009, 10:24 AM
It's the same block as a 5.9, but bored out to 6.7Liters. SAME engine..

um sorry dude but you're WRONG. The 5.9 and 6.7 share about 40% of their parts.

YOU must have been the one that "HEARD crap"

:rolleyes:

ben

Dudgy
12-10-2009, 10:16 PM
um sorry dude but you're WRONG. The 5.9 and 6.7 share about 40% of their parts.

YOU must have been the one that "HEARD crap"

:rolleyes:

ben
Ya and one of the 40% of the same parts is the block... Just bored out to 6.7Liters
So umm, why am i wrong? It's the same block, i didn't say all the other parts are the same. I didn't hear crap, it's under my hood

skyhigh4by
12-10-2009, 11:36 PM
I agree about the solid axle. I think my grandfathers 99 dodge diesel rides nicer than my truck and its stock.

DURAtotheMAX
12-11-2009, 10:26 AM
Ya and one of the 40% of the same parts is the block... Just bored out to 6.7Liters
So umm, why am i wrong? It's the same block

ugh no its not!!!! I dont give a shit whats under your hood, you are still WRONG.

If its the same block then why will a 6.7 crank NOT fit in a 5.9 block. :rolleyes:

ben

Dudgy
12-11-2009, 11:32 AM
ugh no its not!!!! I dont give a shit whats under your hood, you are still WRONG.

If its the same block then why will a 6.7 crank NOT fit in a 5.9 block. :rolleyes:

ben
Cuz that part of the block has changed too.
Then why does an exhaust manifold from a 5.9 bolt up to my 6.7?
And why do connection rods etc from a 5.9 fit in a 6.7?

01Duramax6spd
12-11-2009, 11:59 AM
The guys at Ultimate Diesel have a lot of 5.9 parts on their 6.7 block'd pulling truck ;). In fact I think the head and everything are 5.9.

Dudgy
12-11-2009, 12:19 PM
The guys at Ultimate Diesel have a lot of 5.9 parts on their 6.7 block'd pulling truck ;). In fact I think the head and everything are 5.9.
yup 5.9 head, ecm, electronics etc, just used the 6.7 block for more displacement with 5.9 tuning. There's more than 1 of those around already.:D:D

DURAtotheMAX
12-11-2009, 07:19 PM
Cuz that part of the block has changed too.

so the block is different, and you are wrong...and now you are trying to back pedal.

Then why does an exhaust manifold from a 5.9 bolt up to my 6.7?

because the head is the same

And why do connection rods etc from a 5.9 fit in a 6.7?

5.9 and 6.7 rods are different. That doesnt mean they arent interchangeable.

LMM manifolds, rods, etc will all fit on an LB7, so whats your point? The parts are still DIFFERENT.

DURAtotheMAX
12-11-2009, 07:20 PM
The guys at Ultimate Diesel have a lot of 5.9 parts on their 6.7 block'd pulling truck ;). In fact I think the head and everything are 5.9.

so what kyle, many of the parts INTERCHANGE. But they ARE NOT THE SAME.

Dudgy is trying to argue that the 5.9 and 6.7 blocks/cranks/rods/pistons are the same, which they are not.

DURAtotheMAX
12-11-2009, 07:22 PM
yup 5.9 head, ecm, electronics etc, just used the 6.7 block for more displacement with 5.9 tuning. There's more than 1 of those around already.:D:D

If you really want to argue about whos design has lived on the longest through the current emissions changes etc, its the duramax. GM is the only one who has been able to keep the same basic engine through the 2001, 2004, and 2007 emissions regs.

The cummins went through 4 or so design changes in that time period.

ben

DURAtotheMAX
12-11-2009, 07:24 PM
yup 5.9 head, ecm, electronics etc, just used the 6.7 block for more displacement with 5.9 tuning. There's more than 1 of those around already.:D:D

dude theres a ton of them around. :rolleyes:

screamin seeman
12-11-2009, 07:45 PM
If you really want to argue about whos design has lived on the longest through the current emissions changes etc, its the duramax. GM is the only one who has been able to keep the same basic engine through the 2001, 2004, and 2007 emissions regs.

The cummins went through 4 or so design changes in that time period.

ben
I realize that you are the kind of gut that needs to be right but... Cummins had to make the changes because the ISB engine is in FAR MORE APPLICATIONS than the Duramax. PERIOD. The duramax base is relatively new. The cummins 6B has been in production in light duty truck applications since 1989. The Duramax in light duty truck since 01. Who gives a shit who's design has lasted through emissions? You are a percentage guy. Tell me, what percentage of board members have full retention of OE emissions anyway?

DURAtotheMAX
12-11-2009, 08:28 PM
I realize that you are the kind of gut that needs to be right but... Cummins had to make the changes because the ISB engine is in FAR MORE APPLICATIONS than the Duramax. PERIOD. The duramax base is relatively new. The cummins 6B has been in production in light duty truck applications since 1989. The Duramax in light duty truck since 01. Who gives a shit who's design has lasted through emissions? You are a percentage guy. Tell me, what percentage of board members have full retention of OE emissions anyway?

that was a side track of the original thread, and I apologize for taking it off track.

Dudgy
12-12-2009, 02:19 AM
that was a side track of the original thread, and I apologize for taking it off track.



I said block, not pistons/rods/crank.
You sound like a very tough guy, swearing online haha, go on buddy, it's not even worth arguing with you.:cookoo:

Now stop derailing my thread, and go back on-topic.

DURAtotheMAX
12-12-2009, 12:16 PM
I said block, not pistons/rods/crank.
You sound like a very tough guy, swearing online haha, go on buddy, it's not even worth arguing with you.:cookoo:

Now stop derailing my thread, and go back on-topic.

yeah, and the BLOCK IS NOT THE SAME!!!!!!!!!!!!!! The 5.9 and 6.7's have different blocks!!

Dudgy
12-12-2009, 12:19 PM
Now stop derailing my thread, and go back on-topic.
Can you not read?

DURAtotheMAX
12-12-2009, 12:21 PM
also, if you want to tow heavy with a 5.9 head on a 6.7 block, you'll have to mod the head a bit

DURAtotheMAX
12-12-2009, 12:21 PM
Can you not read?

can you not admit you are wrong? :rolleyes:

01Duramax6spd
12-12-2009, 12:30 PM
Enough Ben.

DURAtotheMAX
12-12-2009, 12:42 PM
Enough Ben.

oh wtf come on kyle. The guy was wrong, hes putting shitty wrong information out there, and I called him on it. Thats why these forums are so stupid and worthless for most advanced tech support. We got into an argument, and he finally realized hes wrong so he just goes off in a huff and says "oh stay on topic"???

unbelievable. ok fine im done in this thread.

ben

screamin seeman
12-12-2009, 01:12 PM
Ultimately you can argue the similarity of these engines if you indeed do have first hand experience. Do either of you have first hand experience? You fellas doing a little web wrenching? The idea is that these engines are more similar than not and therefore have similar longevity and durability.

01Duramax6spd
12-12-2009, 03:32 PM
PM sent ;)

Keep this on topic guys.
Thanks

oh wtf come on kyle. The guy was wrong, hes putting shitty wrong information out there, and I called him on it. Thats why these forums are so stupid and worthless for most advanced tech support. We got into an argument, and he finally realized hes wrong so he just goes off in a huff and says "oh stay on topic"???

unbelievable. ok fine im done in this thread.

ben

kregelsmax
12-27-2009, 02:50 AM
i thought this was a gm and chevy forum not a dodge forum

Dudgy
12-27-2009, 02:54 AM
i thought this was a gm and chevy forum not a dodge forum
No, this is the conversion section, cummins, powerstroke, caterpillar, whatever you wanna throw in a truck

screamin seeman
12-27-2009, 02:55 AM
This portion of the forum is called Frankenstein, so it doesn't need to be made by Isuzu or Detroit to be discussed here.

kregelsmax
12-27-2009, 02:56 AM
ohwww hahaha w.e the thread wasnt talkin about swappin engines anyways only the difference between a 5.9 and 6.7 lol

screamin seeman
12-27-2009, 03:06 AM
Okay guys, i was wondering if anybody has done a 6.7L Cummins swap into one of these 07.5+ chevy/gmc trucks.

From the first post.

iowahoss
12-31-2009, 03:20 PM
Well anyway I hope U get this done because I love driving a cummins,but I wont drive a dodge.

Dudgy
12-31-2009, 03:32 PM
I dunno if i'm ever gonna do it. I wanna race it this coming season and see how the Duramax is gonna do. So far i like it.