I have a B18b or B18A1 IDK remeber and some USDM ITR pistons. The pistons say P73a on them. Im trying to get the pistons NDI'ed becuaser I bought them off of ebay and dont or cant tell if they are any good.

MY QUESTION IS : are these pistons going to fit in this block because I read some were that the oil squiters are different or something? If I cant throw these in the block what would be a good combo as far as piston rods for a NA application. no nvtec

This is my first build. I want to build up a all motor beast. My inspiration BisiMoto. If you know what I mean.

 

or would they be compatible with a LS crank??

 

They will work fine and as for rods just use the ls ones and get them shot peened, install arp rod bolts and resize them and you will be good to go. It would also be a good idea to have everything balanced as a rotating assembly.

 

they will work and work well. its a great set up

 

ITR pistons on ls rods will need some machining. Either machine the piston wrist pin slots wider for the ls rods to fit, or machine the ls rods thinner to slide into the piston end.

 

I have the ITR rods already connected to the pistons?? or stay with the ITr pistons and LS rods and crank like said above

 

The stroke is different between the two, so unless you are running an itr or gsr crank you can't use the itr rods.

 

I think I have a GSR crank in storage . I just want to make sure before I spend the money to get this stuff machined. I know how critical and precise engine building is and would hate to make a mistake after so much work

 

im gonna follow this thread..i want an all motor LS too..as bg as can be...