N/A build

BGTV8

Talk to Clark Steppler at Jim Wolf Technology, he has all the specifications for your build at his finger tips, assuming you go down the VVEL excluded route.

To get 400rwhp, you WILL need higher compression and significantly enhanced cam lift and duration as well as a bottom end and oiling system that will remain safe at 8800 to 9000rpm.

Once you raise the compression, you are going to seriously assess your fuel ... with e85 the obvious solution.

JUN cams and retaining VVEL will not cut the mustard - you will get close, but not exceed 400rwhp.

The other issue you will have is the ECU - the OEM ECU is not going to do the job.

Spooler

That is big money right there. I need one for my 1975 280zt. That is in the 3-5000 dollar range depending on what you get. Not including install, tuning, etc.

Elmo370z

I eventually plan on purchasing a dry sump to cover the oiling problem. I've been debating on the Hr head conversion or just sticking it out the VVEl heads. I just want to know what is the big difference in the Hr Heads Vs the VVel heads as far reaching the mythical 400 whp. Lack of research? too much of a pain in the *** to deal with? Hr easier to work wit? VVel just plain out to complicated?