cam gears for VQ37
 

is this new? Jim Wolf Technology website
might be able to squeeze out little more power out of VQ37's.

Those are for a VQ35 and more specifically a VQ35DE motor. (2003-05 350Z's) Won't work with our VQ37.

says it fits g37 and 370z

i guess they give you more adjustability than our stock cam phasers (which do adjust using oil pressure i believe). also, this would probably seriously throw off the VVEL system if i had to guess. i'd be interested to see some "bench testing" of these on a VQ37VHR

VVEL (and IVT) is only on the intake cams.

Our exhaust cams have no adjustability from the factory. These gears are for the exhaust cams, so they would provide some extra tunability that is not possible otherwise.

I would be tempted to try those ! :)

you may be tempted until you found out how much work it will take to make a simple adjustment!! i dont think this is a realistic option for the VHR since changing the adjustment to dial it in is more time and labor than its worth for anyone but a full time race team.

i agree with this^ you're talking about a good 6-8 hours of labor to make a small change in timing

pretty sure both cams have cam phasers... the VQ35DE "revup" and the VQ35HR did...

Yes thats true those motors did have exhaust phasing. But VHR isn't those motors. It's all in the service manual, and can also be seen if look at a disassembled VHR head.

http://i.imgur.com/dJGuE.png
Notice how the intake valve open and close times have a wide range, and the exhaust valve has 0 range?

No clue why nissan did it this way, maybe they couldn't make it all fit in there with VVEL + exhaust phasing, maybe they are saving it so they can have more power in the next generation engine, maybe cost, who knows.

my mistake, could have sworn it had cam phasers on the exhaust cams...

having done 95% of all my mods and labour & tuning
a few 6-8hours job isnt too bad .. ! hehe

but yeah I would need to study and see how doing it properly ! then start when I feel ready

didn't some of the members with FI and headers complain about no power gains because of exhaust cam and VVEL overlaps, these might help in getting back that power.

But here's a thought, aftermarket intake cams already exist for the previous gen VQ's, why not make the VVEL run to the similar the specs of those cams??

i looked under cwis' hood yesterday and sure enough, no cam phasers on the exhaust cam. sorry about the confusion. i'm guessing that since the cam phasing is done with oil pressure that along with VVEL, it was too much heat for reliability? not sure on that one. obviously the VVEL system's gains are more important than the limited ability of one cam phaser

The lose of power was the top end, basically the top 500RPM, the rest of the power band showed an increase.
Now, will this give back that little boost on the top end? I am not sure, I have not done enough research on VVEL and how the system controls and modulates it control.

FI Headers lean out your A/F pre-tune so people lose power. But after being tuned to that mod, you regain your power back.