I don't care so much about gains as responsiveness.

I don't know how to answer that about responsiveness due to the fact I have not driven my car in 6 months then took it to the shop to get some parts put on. If anyone with an SC Z would like a ride and then they could judge.

Anyone NA have plans of doing this?

In for dyno sheets.

I do once more research is done

Talked to a local shop they have a z lined up that is NA to do some testing on! Ill let u guys know when i hear from them

Very cool.

See if you can get some details such as where valve overlap was changed and where lift was changed in the rev range.

Also, are these bolt-on modded Z's or bone stock? Breathing and exhaust mods will almost certainly make a difference.

Not quite sure what kind of z he is messing with im sure it more than stock at least. The cars that go into this shop usually are not ur average delearship cars haha but idk for certain. We shall see and i will try and get those details once he gets with me

I don't see how this could improve power on NA applications as the intake lift is already at it's maximum point (goes from 2mm to 11m lift) because of the eccentric cam being only so big on the VVEL ladder assembly and the overlap being precise as the rpms go up. I could see some very impressive gains on FI applications as everyone has already stated. Just like to give out my point of view

I seem to recall an old chart from another forum that showed there was more lift possible...

I'll see if I can find the image and post it.

EDIT:

Here...

http://www.the370z.com/members/jordo...vel-curves.jpg

So that chart is saying max is about .500" lift. But it's only using up to .450" lift. HMMMMMM You know how much duration there is?

Has anyone thought of our valvesprings? Can they handle any more lift, duration, and romp rate?

I always thought the issue with springs was the decompression side rather than the compression side (e.g. float).

Also coil bind. ;)

All empirical questions -- hopefully uprev has at least one or two motors they can risk destroying to find the limits...