Thinking about doing a 4.065 bore on my LQ4 block. Was going to try to do it budget minded. Already have 05+ rods/crank. Just need pistons. Was going to go with stock slugs. Then 823 heads (clean up the heads a lil), L92/Ly6 intake (going in a truck)

My question is, how would it hold up to boost? Maybe just 10psi? Reason for asking, because taking the 6.0 block out that far, didn't know if it would create more issues. I'd keep it n/a for awhile. Cam, bolt ons etc.

 

I don't know about boost, 10psi is kinda mild so it might be okay, but NA is fine. I would have it sonic checked and discuss it with the engine builder/machinist to see what they think. I've had mine running naturally aspirated for a couple years and it hasn't caused any issues at all. Hope to have final tuning and dyno numbers this spring.

 

KCS and myself both have running Iron 6.2L motors. (LQ4/9 bored .065" over)

 

I'm also have a iron 6.2 lq motor I'm wrapping up now buts it go stay n/a with ls3 heads ls3 intake and a custom cam.

 

subscribed i'm also interested in both of these

 

I have intentions of adding a D1SC procharger or a relatively equivalent supercharger to my setup, given that I chose a cam specd for a supercharger. Just seeking funds for now...

 

I recently got my block from the machine shop. 6.0+.065. It's notched for a 4-inch crank. I will be running nitrous through it and my machine shop said that .065 is good and I shouldn't have any issues. Good luck with your build and keep us updated.

 

Why? If your going to add boost keep the cylinder walls thick.

 

How do you know its not thick enough without trying it? We'll see how it goes... ;-)