delip and cut

[03dmaxin]

hope this is in the right place if it isnt would somebody move it for me thanks,
but the question is my lb7 pistons are gettin gut and de lipped dows anybody know a good about as far as de lipping i want to get the compression rate around 16:1 any advice helps

p.s. thanks for the info henry :hug:

thanks
dallas:thumb:

 

[x MadMAX DIESEL]

Know a good what? Reread your post lol

 

[03dmaxin]

im sry haha i want to know the best amount to take off the lip of the piston im tryin to have my compression around 16 to 1 hope this rewrite was better
thanks
dallas

 

[maine04max]

I think if you take off just the lip and dont remove (or make bigger) any extra material you will be close to 16.5 : 1

 

[Mike L.]

Call Guy at So Ca lDiesel
661 775 5620

 

[dmaxfireman]

to de-lip remove the lip in the bowl and take about .010 off the head and use 'c' gaskets i think that will put you about 16:1

call guy to make sure...

 

[emiller3]

Thats good to know.

 

[Smokin LB7]

What if you took the lip off, and removed that buldge in the bowl? Is that possible of effective?

 

[03dmaxin]

Thanks for the help guys
I have got. Short block and starting on it asap it's my first build so wish me luck
thanks
Dallas

 

[JD4440]

Thanks for the help guys
I have got. Short block and starting on it asap it's my first build so wish me luck
thanks
Dallas

This might help you along in case you haven't seen it : http://www.duramaxdiesels.com/forum/showthread.php?t=20963

 

[ripmf666]

This may also help on tear down
http://www.duramaxdiesels.com/forum/showthread.php?t=5608&page=2

And this one on rebuild
http://www.duramaxdiesels.com/forum/showthread.php?t=6679

 

[wdino73]

On mine I just did a 1/8 radius, but I set my compression with the headgasket thickness an the piston extrusion, I found a compression calculator on line, that's how I did mine. If I can help with any ??? I'll tell u what I know. that won't take long. LOL check this site out.
http://www.dmperf.com/compression.htm

 

[ripmf666]

Not sure how to attach they excel program here but it does everything for you Guy from Socal made it.

Compression program

input bore 4.055
input stroke 3.9
input chamber cc 4
input dome cc -42
input deck to piston clearance -0.009
input gasket cc 8.65
# of cylinders 8
compression ratio is: 16.65414497
cid 402.9277773

 

[wdino73]

Yes, Guy is a good person to call I spoke to him alot when I built my engine, an I bought my rods an ect from him... Very straight up person....:thumb:

 

[03dmaxin]

thanks for everybodys help
:hug:

 

[JD4440]

Guess I could ask in here, Do you have to be picky about the pistons you use if you coat them ? Like mileage and if they were run hard beforehand ?