That the 07-08 HR engines have no plenum spacers available. Is it due to the changes from the 03-06 engines that aftermarket companies have yet to pounce on creating a plenum spacer? Or worse, could one not possibly be created. I ask cause Im jelous of my friends 05 350z with one nd he dynoed, after a tune, almost 19 more horses to the back tires.

 

theres no spacers for the HR because the planum is a single piece.

 

ok, and this is without a tune .... https://my350z.com/forum/vq35hr-479/...hr-owners.html


so why do we need a freaking spacer ?

 

Nissan redesigned the plenum in regards to the DE's starvation of the front two cylinders. That being said, the HR does not need "spacers" as it is a completely different design as it has two throttle bodies versus one and each intake plenum bank is larger and equally distributes air charge accordingly.

Furthermore, the entire intake runner system is different on the HR. They are much longer and nearly straight versus the DE.

Just for kicks:
http://www.nissan-global.com/EN/DOCU...Engine_Eng.pdf

 

Good info. I honestly had no clue either.

 

I liked reading that pdf. Cool little presentation.

 

thanks guys! I learn something new everyday! This place is great!!!