what is the OEM gap on LS engines?

 

don't know what my stock bottom 2000 LS1 gaps are, but i've got 10.6:1 now, if i remember right, and running 12-13 psi with a 231/248 120+5° cam. it's on pump 93. can't remember how much timing, but it's a little less than at 10psi because we ended up pulling the balancer again to fix the main seal, so i went ahead & grabbed an OD & made another 3psi.

 

Depends on the block but I usually see Around .015-.016 top ring on a Iron 6.0L LQ4. Those are also not the same type of rings either.

 

a high mileage motor will have more gap, part of the reason guys get away with beating on them more.

 

like Dan spinning his blower to the moon on a stock-ish 4.8?

 

The LS engines don't wear as much as you would think. When I bent the Gen 4 rods in my LQ4, the top rings where at .016

I have read the service range is .008 - .020

 

how many miles on it ? How did you bend them? We know your not making any power....

 

Bone stock LQ4 with ARP head studs and LS9 head gaskets.

Boost spike over 20PSI while tuning it. I wasn't present at the time it happened.... The pump gas in it was also old. I had just put 80Lb injectors on it just prior to this

Mileage had to be over 150K, Barely any crosshatch left. #2 and #4 cam bearings had the oil hole's restricted and I didnt like the wear on a few of the lifters.

I rebuilt it with a light hone, 2 used rods and pistons, all new gaskets, new seals, new cam bearings, New Lifters, an XR269HR (comp 54-414-11) cam I had laying around and LS6 valve springs.

 

so it had pre ignition and bent a rod.

 

Most likely. It also needs different plugs.

Bent #2 and #7 rods across the pin Axis around .050-.060 allowing the crank counter weight to come in contact with the pin boss on the Bottom of the piston.

When the twins light off, they spool hard