Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Took my truck to the dyno last week and it dyno'ed 768hp and 1305ftlbs @ the rear wheels. The truck has a stock bottom end Duramax diesel engine in it with twin turbos. After the dyno I took the truck to the track and it ran a 10.99 @ 122mph. I need to work on the suspension because the truck pulls hard to the right on take off. Not sure how you get the video's on here but this is the link to them

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

nice torque outta that Dmax!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

That is SICK truck sir. Well done!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

BAD ASS:metal:

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

I love it!!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

DAMN I wish I could go to youtube out here!!!

It sounds like an awesome truck!!!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

love hearing all the boost whistle down the track :metal:

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Any pictures of the install? How hard was it?
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Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Awesome truck but the only late model bed I have ever liked is the one Mike Nutt did for his truck.

I would love to do a duramax 3/4 ton Suburban.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

That is very cool :thumbs:

Do you have any engine bay pics, or any build pics?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Very nice my friend! Alot of work and alotttttt of money spent on this rig~~~!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

That is just sweet!!! I've always thought that the duramax should be installed in one of these pickups. Big enough engine bay to actually work in and one of the best body styles GM made.

Looks like you might be giving Orange Crush a run for its money soon!! And pretty much smoke free.

Orange Crush is the only other Duramax swap I've seen.
Again great work!!


Thomas

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

It took me 7 months and 1200hours to do the swap. That is fabing everything for the motor and trans mounts, all the frame work, the wiring, and installing a GM 14 bolt rearend with coilovers. I tryed loading pictures but it was taking way to long. I will try later.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

I guess it worked. The first one is of the bus I bought to get the engine and trans and all the wiring. The secound one is of the fire wall. I had to push it back all the way to where the dash comes down. The next one is of some of the frame work, and finally the engine bay last year with out the secound turbo. I need to get some pictures of the engine this year with the secound turbo.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Holy cow nice fab work! That thing looks like it belongs in there...
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Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

How much does the duramax weigh?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Yes that does look nice under the hood, you did a very nice job :thumbs:

Did you use the 10.5 FF 14 bolt or the 9.5 SF 14 bolt?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

nice.... that firebird prob. was a bit suprised.. lol

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Nice Job!! What are you using the air compressor for? Its in the way if you put a second CP3 high pressure pump on;)

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

great work and nice et!!! Now you have a truck that runs 10's :D

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

The duramax weighs the same as a big block. The Allison trans is whats heavy, it weighs 360lbs. The whole truck weighs 5300lbs.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

I used the 10.5 FF axle but I had the ends cut off and Ford big bearing ends welded on to it. Moiser makes custom axles and a spool for it.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

that is awesome. runs tens and probably gets 30 mpg. two thumbs up for sure

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Very nice again! Since it was mentioned, I'm curious now. What kind of mpg's have you seen or is this strictly a track only toy?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Thats the best thing about a diesel, with the push of a button I can go from 525hp 911ftlbs to 615hp 1060ftlbs to 702hp 1200ftlbs to 768hp 1305ftlbs. The truck runs and drives great on all the tunes but I dont drive on the street with the 702hp or the 768hp tunes because I cant get traction. on the 768 tune I can be going down the road at 60mph and go to WOT and the tires just go up in smoke. Its cool but scares the hell out of me everytime I do it. On the 525 tune I get 22mpg around town. I have never taken it on the highway to see what it would get.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

i have to see a video of that right there! not that i dont believe you at all. because i definately do i just wanna see them tires in SMOKE. and you get better gas mileage than my 5.3 reg cab stepside sierra does on the highway IN TOWN! absolutely incredible.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Yep, I knew the tuning range was broad on these. Not too mant guys would frown @ 525hp & 911ft/lbs w/+20mpgs. Sure wish these swaps were easier....

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Maybe I could get someone to sit in the bed when I do it, to get the video. Any takers?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

come on down to pensacola and ill do it! you get to hang out on the beach some too.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

How much do you have in this conversion? I would love to do this!!!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

I bought the bus that the engine, trans, radiator, intercooler, steering wheel and wiring harness came out of for $8000. I have about $5000 into other parts that were needed, and the rest is a lot of fab work. My time is free. All the performance parts are not added to this $ amount.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Holy cowbells, batman. That's one sweet ride man.
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Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Nice truck!!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Exactly!

This forum has some talented fab guys, impressive!

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

I love this idea of building this era truck but I wanna go for reliability and durability basically meaning that my frame will fall apart before the powertrain does over 50 years or so would you say this is a stupid idea to build a d-max daily driver c/10? thats the only reason I'd go for it maybe a bit of added horsepower but I love the idea of that older truck newer powertrain underneath. P.s. have you done any highway miles to estimate your mileage there?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

If you check out post #26 it says what the engine makes for power and the mpg in town. I have not taken the truck on a long enough highway trip to tell the mpg. This would be a great engine trans combo for a daily driver. If you were going to do it you may want to get a 06 or newer because the transmission will be a 6 speed. I run a custom GM 14 bolt with 3.21 gears.
Brett

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

Yeah I've also looked at the Suburban D-max as well as a stock looking one by PPE on this site and Im impressed with all the builds hands down there isnt a better looking truck to put these powertrains into and we certainly have the room for it my only concern after putting all that in would be 1. the ride around town (im sure air ride would fix that) 2. Did you do anything for A/C or is it a pure 2 windows down at 60? 3. You used the stock frame correct and just boxed it and made a new crossmember for the front?

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

1: Air ride will take care of the ride.
2: I have Vintage Air in the truck with the factory D-Max a/c compressor, and it blows ice cold.
3: Frame is stock but I boxed the front half up to the transmission crossmember. I used the factory front crossmember but had to cut alot of it out and box it in.

Re: Dyno'ed 768hp 1305ftlbs & ran a 10.99@122
 

:metal: Wow that is some really impressive fab work just a ton of fitting hours I'm sure and I like the bags inside the Springs thats a good concealed look and not just relying on the bags (in case of a blowout) and I'm glad my vintage air would work with it as well I was concerned with how much the engine and tranny went into the cab and what would fit behind the dash after the build. Im glad to see you kept it five lug as well keeping the look of the classic.