LB7: Pistons ?

[durallymax]

You can't put a HP number on the piston failures. There are guys running over 600 hp with no problems, and there are guys cracking them at 500 hp. I had cut LBZs in my rebuild and they ran over 700 hp without a problem, but they were only in for about 4500 miles.

kinda like theres guys over 700hp not bending rods and guys like me under 600 who are bending them

 

[TrentNell]

kinda like theres guys over 700hp not bending rods and guys like me under 600 who are bending them

did you find a low compression cylinder ?

edit : just read the thread sorry man

 

[duratothemax]

kinda like theres guys over 700hp not bending rods and guys like me under 600 who are bending them

LB7/LLY rods are weaker than LBZ rods though

 

[durallymax]

true

trent: yes #2 was struggling to make 200psi

 

[Gasuout]

BTW, after pulling the motor I did find all 8 LBZ rods were bent a little bit

Not suprised ..... hahahaha :rofl:

We'll see how well the lbz rods hold up in this motor in mine now .

Still kicking myself for not waiting and saving more $$ for some carillos .

Needed motor back in truck and running . You kind of tell yourself ... I'll be fine , I wont lean on this motor . Then your back at it leaning on it and picturing your weak rods in there .

I didnt bend the LLY rods , so we'll see how the LBZ rods hold up till a new motor comes together . I have a block and lly heads already , just need to get to it and build another one . Would like to have a real complete bad boy on the engine stand waiting to go in .

 

[othrgrl]

sounds good dustin , i like the idea of a fan as well , post up some pics also when you get it finished .

Will do.

 

[othrgrl]

Also whether you want a thermostatic oil filter adapter or a plain adapter you need to know that the nipple for the oil filter is 20mm x 1.5 thread and the o-ring seating area is 3.5" diameter.

Correction it is a 13/16 x 16 thread and the remote oil filter mount I bought will accept a Duramax filter. I ran a PPE race valve (20mm x 1.5 pitch) I had sitting around into my old engine adapter and it fit so they may interchange but after some research I found that it is actually 13/16 x 16 and verified that the old engine adapter would thread onto my new remote filter mount.

Didn't want to mislead anyone.