400 whp on N/A VQ possible?

BGTV8 · 12-12-2014, 12:08 AM

No, because if you want to run "big" cams, you have to ditch the VVEL.

VVEL "is not" motorsport quality technology (jury is out on reliability) and the potential for VVEL actuator failure in hi-rev and hi-vibration environment is just not worth the risk.

Only Nissan understands the relationship between piston position and valve clearance and reverse engineering it will be a b1tch.

Ergo, if you want 400+ the only reliable way will be with HR heads.

I have not doubt you can make 400+ with VVEL, but you might lose 2 or 3 engines getting the level of knowledge, UNLESS you can get access to the OEM Nissan model for valve timing and lift vs position of the piston in the bore. then you need to be able to play with cam timing - it is just too hard !

It is not an investment I would make

12-12-2014, 12:08 AM	#11 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,515 Drives: 09 Nissan 370Z M6 Rep Power: 39974	No, because if you want to run "big" cams, you have to ditch the VVEL. VVEL "is not" motorsport quality technology (jury is out on reliability) and the potential for VVEL actuator failure in hi-rev and hi-vibration environment is just not worth the risk. Only Nissan understands the relationship between piston position and valve clearance and reverse engineering it will be a b1tch. Ergo, if you want 400+ the only reliable way will be with HR heads. I have not doubt you can make 400+ with VVEL, but you might lose 2 or 3 engines getting the level of knowledge, UNLESS you can get access to the OEM Nissan model for valve timing and lift vs position of the piston in the bore. then you need to be able to play with cam timing - it is just too hard ! It is not an investment I would make Streetlife likes this.