My Twin Turbo 427 Silverado SS

04chase

Member
Mar 28, 2008
222
1
18
some of you guys may be keeping up on diesel place but here is my project i plan to use my dmax to haul around



2004 Silverado SS
427 LSX Twin Turbo
4l80e AWD​

Motor components

lsx gmpp block (head bolts will be 1/2 inch with the 6 bolt heads)
trickflow 235 cc 6 bolt heads with inconel exhaust valves and .650 lift springs
callies 4.00 x 6.125 rod 2.100 journal dragonslayer crank
lunati pro billet 6.125 i beam connecting rods w 225,000 psi bolts
diamond 4.125 custom coated pistons
morel ls1 hydraulic lifters
yella terra ultralite rockers
asp damper

cam specs are on the way (last picture)

turbo specs are somewhat set but not set in stone

pictures of some parts below


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not my turbos but ill be using this intake manifold

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short block is done!!!



shows the callies dragonslayer, lunati pro billets

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here is a lsx head stud vs a bbc stud which is what we are using plus the extra 2 bolts per cylinder

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meziere electric water pump

moral tie bar lifters.

melling oil pump

also switching to a complete hydroboost setup. squeezing every last ounch of hp out of this

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you can see the extra bolt on the heads in the lifter window.

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these will not be the final valve covers just covering the valvetrain


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ran into a little problem , the way i have the regulator wont work as it hits the firewall so im going to bend some hardline up and make my own fittings on the rear passenger rail to push the regulator back a little . also going to have to cut the driver side fuel rail down to near the injector and cut a -8 an fitting and weld it to the rail . then use a 90 -8 female to hose then to the y. this is with the stock 105 amp alt , going to pick mine up tomorrow and make sure it will have a shot as its even bigger (200 amp) but should work . below you can see my issue with the smaller alt.

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well the valve covers came in today .

got some work to do still ( figuure the best way to mount them as i have options with these mounts and need to make sure the wires i have will work )

pics

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man the little things take forever. i keep saying this weekend but run into more things that need to be done. i didnt like the way the coil brackets were mounted to the covers so i made some changes. i tapped the braket mount in a different location so that i could move the coils up and not block the engraving as much . this way you can see the covers and hise some wiring behind them . below you can see how they were supposed to be mounted and now how they are mounted

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well today should be launch. got everything pretty much done . with alot of help and thanks goes to 03caddypimpin , he has helped out so much with this swap . letting me make an absolute mess at his house .

also reynaldo aka chpspecial is also helping out a bit with the tuning and base file.

we did get to crank it over but the battery was really weak. so its charging and i had to go do some family business . i will be back in a few hours and hopefully driving the beast.

here are some almost final pics of the motor n/a

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drove it home about 10 miles yesterday . it has some bottom end for sure. first time i have driven it with a stock converter since 2005.

here is a real idle clip

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Air Compressors and collectors/flange's

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turbos mounted

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more sexy

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waste gates



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intercooler is finished

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im running the dougs all stainless guillitine style . we got them from a friend of the family that made them for dougs for a great deal . i wish i could still get them but the man who helped me out passed a few years back

btw here is the latest update on the setup

ok here is a little update on the SS here is the turbo kit together out of the truck

nice little update and plenty of pics which i love .

here is the kits hot parts ready for coating

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Last edited by a moderator:

paint94979

Beer Nazi
Sep 18, 2006
11,715
8
38
37
All i can say is WOW... that is an amazing looking engine very impressive:D glad to have you sharing this with us
 

04chase

Member
Mar 28, 2008
222
1
18
yeah i know its a gasser but its where i started and where most of my knowledge is . im a diesel mechanic for a living so i know the diesel a bit just not performance i know the commercial side of it .

still afraid to touch my 08 lmm in fear of breaking it and having two busted trucks that arent reliable .

this ss i went really big on the hp and money spent hoping i can have something that will be somewhat reliable . i had a hell of a time with trannies in this thing so i went 80e finally

should be able to give all the big hp dmax's a run for their money.
 

04chase

Member
Mar 28, 2008
222
1
18
i have alot of pics of it im working with truckin for a new shoot on it again i had one with the blower setup and didnt want to publish since i had bigger plans.

for numbers im hoping for north or 1000 awhp on high boost 20+ psi . 800 on a street tune with about 15 is what it should be .

track numbers im hoping for 10s all day and 9s with some good weather and pushing the motor a little. im guessing it will take near 1250 to get me there .

weight was 5500 with me before this setup so add the extra weight of the lsx block , turbos, big water tank for the intercooler, the heavy ass 4l80e , im guessing near 6k
 

xx_ED_xx

New member
Jun 10, 2009
1
0
0
I am doing a twin turbo 8.1 in mine. i am interested in learning more about how you converted to hydro boost. you can email me direct if ya like [email protected]

Beautiful engine by the way.:coolspot: