swapping a OBD2 LS block into my OBD1 car. I'm still using the OBD1 I/M, Alternator, Dizzy, ETC. The OBD1 motor had the PCV box connected to the block. But my OBD2 LS motor doesn't not have the hole for the PCV box to connect to the block. Its just sealed off. So Can i just get rid of the PCV? or does it go somewhere else on the OBD2 motor.

 

https://honda-tech.com/forums/forced-induction-16/official-k-i-s-s-diy-forced-induction-greddy-nrg-cathcan-install-b16-b17-b18-1490117/
this has lots of info about it im also doing the same thing and it has helped me out alot

 

i read some of that stuff. good info but i stilldont know what to do. Should i jsut remove the PCV box and Where do i plug in that PCV tube from the OBD2 Valve cover??

 

You will need to hook up your own breather box/catch can.

This very extensive LS/VTEC thread recommends that if you use an OBD2 block to use a breather box kit from Z10 or Endyn or another reputable company.

Scroll down about halfway till you see the pic of the OEM breather box, and read the paragraph above it.

https://honda-tech.com/forums/all-motor-naturally-aspirated-44/how-build-%22reliable%22-lsvtec-b20vtec-1676914/

 

ahhh, more money to spend. -_- So i can't use my Stock OBD1 PCV box on the OBD2 block?

 

Well I thought maybe the OBD2 block just had a threaded plug that you could remove and use the OBD1 breather box, but apparently not from reading that LS/VTEC thread above. Have you looked to see if there's a plug on your block in that location?

 

uhm, theres a plug right under the I/M on the block that connects to the bottom of the i/m if i cna remember right. i guess i'll just figure something out.

 

in my build right now i got the greedy can that i modded by drilling a hole on the top and put a 3 inch k&N filter in the top and the two fittings in the back of my block