Does anyone know if VQ37 shares the same piston as VQ35HR? I am looking to rebuild the bottom end to lower the compression.

 

No.

 

bore is the same, but not sure if the pistons are the exact same. call nissan and ask for part numbers

 

Supposedly the blocks are identical. The heads are different. www.courtesyparts.com is sometimes hard to understand but they have slightly different part numbers but they cost exactly the same.

Probly easier to have the dealer look up part numbers.

 

Oh..they do show a different part #. Does anyone know who makes VQ37 A/M low comp pistons?

 

bigger valve reliefs in the VQ37VHRpiston
stock the valves can open 2-11.5mm

 

Per their website, Wiseco makes a 9.0:1 piston for the VQ37VHR and they have K1 billet H-beam rods available too.

http://www.wiseco.com/Catalogs/SportCompact/Nissan.pdf

 

So does the increase in displacement come from the crank?

 

Nvm. It is explained on wisecos site.