i just put my new pistons in and its hard to hard to turn if i try to spin a part of the crank, all the pistons were gapped properly just maken sure that its normal, like if i grab part of it and try hard it barley moved

 

not good.

 

Without the pistins in it can you turn the crank with your bare hand? If not pull it back apart.

Whats the piston to wall clearance? ring gaps? rod and main brg. clearance?

 

without the pistons in it spun no prob, top ring is .020 2nd .022 main clearence was .0001-2

i didn't check piston to wall clearence how do i do that

 

If its in the car, with sparkplugs in place, in neutral, it requires a good amount of force with a wrench to turn it over, but it shouldn't require the force of lets say...jumping on a breaker bar.

 

are you sure? We normally go .003" I would look for .0025 at a min.

Ring gaps sound fine. If you don't have a piston mic and dial bore gauge the put the piston in the cyl. and see what feelr gauge you can get down in there beside it. Your pistons should have told you what it should be....it will not be perfect but pretty close. Without a tq plate on it and being kind of a crude way of checking it....if its close I would say your fine.

It has to be something in that bottom end. I also guess this is on a stand? Be sure you get this fixed, if not its going to get tight and blow up real quick

 

yeah its on a engine stand, well i figured out what it was, the jackass taylor sims from dallas powerhouse, hes on ls1tech sold me the wrong pistons telling me they were right

the rear driverside piston hits the crankshaft, so am i screwed or can i fix this somehow?

 

well need to know where how and why its hitting.......if its not too bad I guess you can do something.

I'm not an lsx guy so I don't know. Kraest probly does.....he can lead you in the right direction, I just have some basic general knowledge

 

Get the correct pistons. That should be a no brainer

 

I agree. Pull it back apart and send the pistons back then get the right ones from someone else.

 

Is the piston hitting the crankshaft or the crankshaft position sensor reluctor ring? LS1 strokers need the rear piston clearanced for the reluctor ring - not all aftermarket pistons have this!