LB7: Turbo go boom need opinoins on rebuild

TrentNell

Finally underway !!!!!
Jul 7, 2008
7,543
0
0
44
slc tuah
no lol unless you will be quick bout it :rofl: j/k if you want to but the motor will be in blackfoot

so i should only want to push 600 at the wheels with lmm rods:confused:??? an i would take it to utah but i really don't have the money to take it or ship it an drive down to get it an the local guy i can keep an eye him thanks for the info though trent if things change i'll give him a call :)

I would call before you choose , it may be cheaper in the long run i9f his prices are better , and like I said he has built alot of big power trucks , all tof he "Custom Auto" motors , Matt Moons , Dimitri's , Matt Larson's just to name a few .
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
It's not the rwhp you will be making that you need to think about it's what it will be making at the crank shaft. And if your looking at 650 rwhp it's going to be alot more at the crank in hr and tq and say good by rods and mybe even the block then.

so what will lmm rods do safe??i was always told they could take 650 thats all i really want to push 650 should let me run low 12's wouldn't it
 

ripmf666

Active member
Sep 20, 2006
15,123
14
38
47
Wentzville Mo
so what will lmm rods do safe??i was always told they could take 650 thats all i really want to push 650 should let me run low 12's wouldn't it


The last time I dynoed my truck before it blew up it had a 4094 on it with a single cp3. The truck made 580 rwhp on that setup made it a few more months and then cracked a piston when I installed a wicked diesel reg and turned it up alittle more.The rods were checked and they were fine. I know Tomac bend a set at around the 700 mark or just before that to think I about it I think he snaped one in half have to look over some old post on the diesel place. You only have 65 thousands clearance from the rod to the side of the block to play chance with.
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
well sounds like if the tuning is good ill be ok to hit 600-650 with say water meth and new turbo and injectors to drop pulse width and timing. i just don't have the cash to spend another 2600 bucks im flirting with disaster but lmm rods is all i can afford so i really do want to thank you guys for the advice and support wish i could afford to do it all the way :( its already going to take me awhile to do whats planned
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
3,890
44
48
44
ZEPHYRHILLS, FL
well sounds like if the tuning is good ill be ok to hit 600-650 with say water meth and new turbo and injectors to drop pulse width and timing. i just don't have the cash to spend another 2600 bucks im flirting with disaster but lmm rods is all i can afford so i really do want to thank you guys for the advice and support wish i could afford to do it all the way :( its already going to take me awhile to do whats planned

Speaking from years of building race engines, it is ALWAYS cheaper to spend the money now rather than later. You might think they will work, but ask yourself is a maybe REALLY worth it? I don't know much about the DMAX as far as what can take what, but I have played with some high HP small blocks in my day. We always found that paying now saved you ALOT more later even if it meant postponing your build.
 

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,674
1,941
113
Mid Michigan
so what will lmm rods do safe??i was always told they could take 650 thats all i really want to push 650 should let me run low 12's wouldn't it
Im figuring (hoping) they will be ok to 610-620, as that will give me some "margin". Just have to have ~590rw to run an 11...thats all I want.

~550 should allow you to run low 12's if you're smart with it. Truck has to be setup right to do it..suspension, weight reduction, etc. Just be smart with tuning. Dont be greedy.


Ferm...sometimes you just have to do what you have to do with the parts/funds at hand. Sucks, but thats the way it is for most people.
 
Last edited:

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
Im figuring (hoping) they will be ok to 610-620, as that will give me some "margin". Just have to have ~590rw to run an 11...thats all I want.

~550 should allow you to run low 12's if you're smart with it. Truck has to be setup right to do it..suspension, weight reduction, etc. Just be smart with tuning. Dont be greedy.


Ferm...sometimes you just have to do what you have to do with the parts/funds at hand. Sucks, but thats the way it is for most people.

YEP unfourtantly all i can do right now is kinda upgrade it i really wanted to put carillo rods and compunds on but im young and i was laid off for the last three weeks an maybe more so it is how it is. hey bac wanna go in together on some powerball tickets its 170 million up here last i herd:thumb:
 

TrentNell

Finally underway !!!!!
Jul 7, 2008
7,543
0
0
44
slc tuah
whats his number? i'll at least talk to him i knew he did all of james trucks were exactly is the shop at how long of a drive would i be looking at?

Randy's Engine & Machine (435)8964876

If you want 650 buy rods

X2 it may take a bit but it will fail eventually with stock rods , its alot of money to spend to build a motor that can still be hurt easily with a little too much power of a tuning mistake .
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
Heres a couple pics look at the differnce between the number 6 line and number 4 line?? Why so gummed up and dirty? And ya maybe i'll just have to go get another vehicle and wait fora year to get stronger rods
 

Attachments

  • DIRTY LINE.JPG
    DIRTY LINE.JPG
    53.5 KB · Views: 58
  • DSCN0757.JPG
    DSCN0757.JPG
    334.4 KB · Views: 55
  • INJECTOR LINE.JPG
    INJECTOR LINE.JPG
    61 KB · Views: 52

1chevy02

New member
Jun 23, 2009
504
0
0
Every lb7 I have seen has some rust on the injector lines on the rear cylinders. I have been able to clean all but 2 of them up with a #8 glass bead and sandblaster from harbor freight. I have not had any problems doing that so far.
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
think im aiming for just 600 now changed the plan so just going to do 60% nozzles probably a s464 turbo from a guy on here and delipping the pistons while its apart and stud the heads an that's it got to get some bolts to put it on the engine stand so i can pull the heads and see how it looks inside
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
well its all apart ecept for the crank and rods injectors came out all the cups stayed seated now....
do i need to take the cups out to clean the heads up?
Does anyone have all the stock specs for everything on the block and crank ect.. i should check for play?
And who should i talk to at big dipper for nozzles?

also do i need to do an align hone without main studs????
the seals an everything look fine on the injectors should just need new copper washers right? or put new rings on them to?

an whats with the block moving with studs? im confused on this? what else is done while its apart weres a good source for the fuel system copper washers?
 
Last edited:

seth999

Wheeewwwww!!!
Jul 1, 2009
439
0
0
Corbin,KY
thats what im shootin for with lmm rods right around 600hp i know of guys running 650hp in lmms with twins and havent blown YET