I've been playing around with some of the SCR/DCR calculators out there. I've seen both a negative and positive deck height used. What is the factory LS1 deck height?

I can't believe how much I've learned in the short month I've been a member here.

This place rocks!

 

Depends on how you look at it. The pistons are out of the hole.

 

Yep, and most of the calculators like J-Rod's use " -.006 " in the DCR calc.

 

So which is the correct value then?

Use -.006?

 

-.006 is above deck and it is the correct value to use.

 

-.006

 

some calculators are backward for whatever reason, what i do is plug both in and the one that yields higher compression is out of the hole.

 

-.008 has been the commonly accepted value until this latest calculator came out. I have no idea why it suddenly got changed.

 

LOL, i always used .007. The numbers seem to change every year. Ive heard stories of pistons being as much as .010 out. Not to mention that people need to remember that it could be even greater if the piston is still cold and rocking in its bore. Dont go too close with your quench!!!

 

If you're talking about my calculator (and every other calculator I've seen for that matter), it should be a negative number. You can use -.008 if you want to be ultra paranoid, and honestly, that's not really a bad thing. But the average is closer to -.006 from what I've read and been told.

 

So assuming stock deck height (block not decked) would stock crank, eagle 6.125 rod and Diamond 3.905 off the shelf piston yeaild -.006?

How about other non-stock connecting rods/pistons?