Stock LLY internals;What next for most HP?

[D-nAsTy-MaX]

Okay we are talking about the truck in my signature i am the original owner i bought it brand new it is a 2005 LLY has 69k miles. till about 40k miles it was stock! then i did efi-live dsp5 from nick at duramax tuner and a airdog 150, snow stage 2 water methanol injection, afe stage 2 intake, and silverline 4" turboback exhust straightpiped, and gauges! this was all until 60k miles when trans was continuously limping! so time for trans n more hp, the last 9k of which had the SCIV trans and ARP headstuds and grade C gaskets! as well as lbz mouthpiece, FPRV shim, and egr system delete! and much higher efi tuning from dustin at diesel addiction! dyno'd it last week on georgia diesel's dynocom dyno the highest tune made 542hp and 950ish torque this tune is not ran unless see someone out to race, the next tune down thats ran daily made about 430hp i believe! this is strictly dailydriver my only vehicle and i do hotrod it on the street! am cautious doing so though!!! never been to track or pulled!

That said! What is recommended by true duramax performance GURU's next to get most out of this stock internal daily driver LLY without worrying about having to build motor???? i want power but reliability!!! I want twin turbo's but dont know what combo to get most out of it without killing it!!! as well i was thinking of doing a modified cp3??? if so how much over stock modified? would like to do dual cp3's if they can be run without killing it?? and injectors??? what hp injectors?? this is just what i was thinking! im wanting true dmax performance experts advice! ready to get ball rolling on this!

thanks guys,
Kevin Jacobs

 

[paint94979]

you should stop where you are right now if you don't want to "kill it" odds are in your favor that your engine will last a LONG time if the power is used in moderation... I have an 05 with a GT4094, Wicked Diesel CP3, and a built trans... i am at the threshold now of my next pass could be my last. 540hp is a great number and chances are 99% of vehicles on the street will be substantially slower than your truck. By the sounds of it you don't race or pull your truck. I am in the 650hp range and in 2wd on the street my truck just spins tire, so basically unless im on the track my power isn't all that fun.

 

[D-nAsTy-MaX]

really ya dont think it would last wit twin turbos retaining stock vvt for small turbo, and either modified cp3 or duals dialed in right to be ran on stock motor, and injectors

 

[paint94979]

really ya dont think it would last wit twin turbos retaining stock vvt for small turbo, and either modified cp3 or duals dialed in right to be ran on stock motor, and injectors

there are HUNDREDS of threads asking the same question you just asked... no one can answer than question some engines live some don't. 650hp is 650hp that is double what these engines were built to handle. You are sorta playing a crying game so to speak. If you don't want to waste your engine put it back to stock and enjoy 500,000miles if you're lucky

 

[Builtlngbd]

go twins and thats it not dual cp3's or injectors.....I had just twins on my truck the Mpi kit with stock cp3 and injectors and still cracked a piston. But i was running a very hot tune and i run my truck very hard... Mpi's twin kit would be the furthest i would go. Now if you get a built motor then you can play!!!!!!!!!

 

[D-nAsTy-MaX]

how bout jus the twins till i can afford motor build? couldnt get away wit doin the twins mildly modified cp3 and mild injectors on stock motor could i???

and then once built motor do dual fuelers and bigger turbos on the twin setup and injectors?

opinions on cheapest built motor that will last???

 

[Builtlngbd]

thats what i said. "just twins and thats all". i would not bother putting injectors in or putting on a modified cp3. you will be plenty happy with the twins and rob's tuning. Once you go with a built motor then yes step up to dual cp3's and injectors. Sizes on injectors and turbos depend on what kind of goals you are going after and what it will be used for. if you put bigger stick's and a cp3 your fun will be short lived and a cracked piston will soon follow. my truck with twins lasted a long time b4 a piston let go and it had over a 100,000 miles on it.

 

[D-nAsTy-MaX]

okay so twins and new tuning only! then motor build! then dual cp3's and injectors and even bigger twins!

dam wish twins mild modified cp3 and mild injectors would last on stock motor!!!!

how much am i lookin at for good motor build?

carrilo rods, idk which pistons, keyed aftermarket cam, keyed 7.1 crank, mainstuds, machine work, stage 1 or 2 heads dependin on if stage 2 worth the extra coin, watever else im missing

 

[Builtlngbd]

Give guy at So-cal Diesel a Call he will set you up and can even send you a quote on everything. It will be cheaper if you can build it your self. I spent the extra money and sent mine in to him to have them do it. They do great work and would recommend doing that if you do not know anyone that has done one b4 and you yourself cant do it. But yes mpi's basic twin kit and Rob Coddens tuning and you'll be good to go

 

[LBZ]

What about suspension/steering? Cognito tie rods, centerlink braces, maybe a set of caltrac's if you head to the track much and a set of good shocks.

I wouldn't do anything else till you build an engine for it.

 

[LarryJewell]

go twins and thats it not dual cp3's or injectors.....I had just twins on my truck the Mpi kit with stock cp3 and injectors and still cracked a piston. But i was running a very hot tune and i run my truck very hard... Mpi's twin kit would be the furthest i would go. Now if you get a built motor then you can play!!!!!!!!!

How hot of a tune were you running you pegged my attention since I have duel fuelers mated with a Cheetah turbo. What kind of pulse and timing were you beating on your truck with when you cracked the piston and how long playing hard did it take?

 

[D-nAsTy-MaX]

to builtlngbd:yeah guy knows his shit bought headgaskets n arp's from him did that job myself he explained it to me well upon ordering the parts then dustin from dieseladdiction and harley from georgiadiesel both answered questions i had in the process of doin it myself!

i would try n do it myself maybe jus for money saving but it'd be first time just like headgasktes n arp studs were first time!

if ya dont mind me asking could ya p.m. me what ur entire build cost? like parts n having guy do it! also what parts ya went with!

thanks man ur very helpful n ur truck looks sick n ur avatar by the way!

 

[D-nAsTy-MaX]

to lbz: it has cognito steering braces and ppe tierod sleeves! bein its running oru torsion keys wit the bilstein 5100 zinc shocks and 2" rear blocks i might buy a cognito 4-6 non tbar drop front lift to get the cv's back flat if i cant have done the solid axle swap im planning by then!

to larryjewl: your running dual fuelers and a cheetah turbo on stock lly??

 

[maxaholic]

How hot of a tune were you running you pegged my attention since I have duel fuelers mated with a Cheetah turbo. What kind of pulse and timing were you beating on your truck with when you cracked the piston and how long playing hard did it take?

His was also a lbz Larry.

 

[Builtlngbd]

How hot of a tune were you running you pegged my attention since I have duel fuelers mated with a Cheetah turbo. What kind of pulse and timing were you beating on your truck with when you cracked the piston and how long playing hard did it take?

yea man i was runing a full blowin race tune from Rob.BUT i allwase ran that tune day in and day out! and i was allwase street raceing and taking the truck to 143mph and what not. Im still learning the tuning stuff but i dnt mess with any of it. So i couldnt tell you the pulse width stuff. But it took a year of very hard driving to pop it

 

[Builtlngbd]

yea man ill find the quotes and stuff but it will just be a close ballpark figure as im not to sure if guy has changed prices and all that stuff or not.

 

[D-nAsTy-MaX]

so then can a stock lly handle twins and dual fuelers and injectors wit good tuning???
or even the twins and mild modified cp3 and mild injectors???
or is it still that it can just handle twins on top of what i already done?

 

[D-nAsTy-MaX]

yea man ill find the quotes and stuff but it will just be a close ballpark figure as im not to sure if guy has changed prices and all that stuff or not.

i understand that yeah let me know please thanks!!

and really in ur situation it coulda been the extreme tune being ran hard daily! so a stock lly like mine maybe could handle more than just twins, could handle dual cp3's and injectors wit mild tune ran daily and a all out tune thats not to extreme only be used for the rare street race i get into?

 

[LarryJewell]

yea man i was runing a full blowin race tune from Rob.BUT i allwase ran that tune day in and day out! and i was allwase street raceing and taking the truck to 143mph and what not. Im still learning the tuning stuff but i dnt mess with any of it. So i couldnt tell you the pulse width stuff. But it took a year of very hard driving to pop it

is yours a LLY or a LBZ

 

[LarryJewell]

so then can a stock lly handle twins and dual fuelers and injectors wit good tuning???
or even the twins and mild modified cp3 and mild injectors???
or is it still that it can just handle twins on top of what i already done?

My guess is that the right tuning will make it live, just tell your tuner what you expect and how rough you plan on driving it.