Super Budget Build Opinions?

[sweetdiesel]

At the very least have a spare block on hand. Maybe a crank too. Almost everything else expensive (heads, cam, etc) can be salvaged off a motor thats been blown up.

Reason I say block is because 95% of the time a piston cracks it scores the block to the point of it needing to be bored. Not saying you cant bore your [scored] block out, but then it forces you to buy all new pistons which can be a huge expense when used cut/delipped pistons work fine. Not like you are going to find used good condition .020 over pistons.

I have like 350 dollars into my pistons. 250 for a set of 8 used good ones and 100 at the machine shop to have them cut/delipped. 350 dollars would barely buy you 3 new .020 over unmachined pistons.

I reused my original LLY crank (had it balanced, keyed, polished and magnetic particle inspected though), cam (had it keyed), and heads (cleaned them up with a can of brake parts cleaner and a razor blade knife). The block is a 2001 LB7 with 300k miles on it.

no coating Ben?

and IMO no one should bore it out....would you?

 

[Tacojedbob7]

To be honest never even seen the cam pin, All I seen was blue marks and said " I need a new one"


geuss it was small enough to not see it

I think the spare cam I was going to send out to be keyed has heat discoloration (blue and red) I just assumed this could be from an intentional heat treating...anyone else notice this? Should I be looking for another cam?

 

[Tacojedbob7]

no coating Ben?

and IMO no one should bore it out....would you?

no coating for ben's...I am debating it, but to keep in "budget" I doubt it. is it really needed for a goal of 700-750hp?

 

[duratothemax]

I think the spare cam I was going to send out to be keyed has heat discoloration (blue and red) I just assumed this could be from an intentional heat treating...anyone else notice this? Should I be looking for another cam?

that cam is fine.

No I did not coat them. I have seen no evidence or examples of coating really being a huge benefit other than "the idea sounds like it would work really well and be beneficial". Not worth me talking/debating/woulda/shoulda/coulda about the engine right now...its already together and running fine.


coating can go the opposite way too maybe. not allow heat to be transferred throughout the mass of the piston and into the oil. The oil cooling is what soaks heat out of the piston. Coating theoretically prevents this no? We need the heat to be circulated throughout the mass of the piston itself. Cummins pistons dont crack. Why? Because they are almost twice as "tall" and twice as heavy as dmax pistons.

 

[Tacojedbob7]

that cam is fine.

No I did not coat them. I have seen no evidence or examples of coating really being a huge benefit other than "the idea sounds like it would work really well and be beneficial". Not worth me talking/debating/woulda/shoulda/coulda about the engine right now...its already together and running fine.


coating can go the opposite way too maybe. not allow heat to be transferred throughout the mass of the piston and into the oil. The oil cooling is what soaks heat out of the piston. Coating theoretically prevents this no? We need the heat to be circulated throughout the mass of the piston itself. Cummins pistons dont crack. Why? Because they are almost twice as "tall" and twice as heavy as dmax pistons.

Thats what I was thinking aswell.

 

[malibu795]

that cam is fine.

No I did not coat them. I have seen no evidence or examples of coating really being a huge benefit other than "the idea sounds like it would work really well and be beneficial". Not worth me talking/debating/woulda/shoulda/coulda about the engine right now...its already together and running fine.


coating can go the opposite way too maybe. not allow heat to be transferred throughout the mass of the piston and into the oil. The oil cooling is what soaks heat out of the piston. Coating theoretically prevents this no? We need the heat to be circulated throughout the mass of the piston itself. Cummins pistons dont crack. Why? Because they are almost twice as "tall" and twice as heavy as dmax pistons.

on the flip side.. the coating could give the smaller piston heat displacment/rention values of a non-coated piston that is twice the size..

 

[RENODMAX]

mine arent going to be coated. no money and like ben said, havent seen anything other than people liking the idea.