exhaust valve lift
 

I notice in the 2012 service manual that the bank 2 exhaust cam has about 1.7mm more lift than bank 1. Do these cams have a similar lift difference for bank 1 and bank 2?


Edited typo on cam lift.

This is great news as I don't want to raise the rev limiter too much past 7.5k RPM.

That is strange, the JWT units are identical side to side but let me talk with them and see about this. There have been some weird changes to these motors over the years.


-Daelen

You shouldn't raise the rev limiter for any reason, the oil pump isnt efficient padt 7500 rpms

I'm sure the price Kyle quoted is if you give him the heads off the motor already. This is just machining costs and assembly of just the heads. Not actual tear down and reinstall.

Yup sorry i didn't add that.

sub

Have tried to keep up with all the PMs and everyone should have a response! Let me know if you have any other questions as I am more than happy to answer!

This is a huge step in the right direction with these motors and I am excited to keep going.


-Daelen

a very worthwhile mod. would look into this whenever the time comes for a motor rebuild.

There isnt more lift on one side of the head, the cam is offset on the bucket and runs at a different ratio in order to retain the same timing equipment as previous vq engines. It was cheaper for nissan to make one different cam than to make all new length chains and alter the disign of the block. The vvel is different on each head for the same reason one appears to have more lift than the other. But is actually the same at the valve. Also @ MA Motorsports whats up ray?(unsure who's managing forum duty) i spoke with you a few years ago at the FD of long beach when the shiz happened with essa. Had a bunch of life crap happen. Im working on a new vk56 project will call the shop next week.

Edit: also at seb my old car is still holding strong with the drysump and ati balancer new owner may be interested in doing 500bhp 9000rpm. Im doing a custom rpm rollbar in it(which fit like **** btw) and i know we already have the airflow so i will give you a call next week as well. hes out your way in ojai and i am way too busy to do it.

Sounds good. Hope all is well.

So your saying that the CAMS ARE ACTUALLY different and this needs to be taken into account by aftermarket?

Spot on, and this is Daelen but I will get the message over to Ray! Holler if you need any VK info, we are always working on some fun stuff with those.



Jim wolf is very aware of the situation and this was taken into account. The OE measured the lift from the "base circle" of the cam, and JWT based the design off that also. So the lift/duration does not vary from side to side but the base circle will, the same as the OE. All due to the VVEL system and how Nissan set up the heads.

Also just for future search's:

For the DLC coating on the cam buckets, the 2009 model year for the G7 and 370Z was the only year that some cars came with a motor that did not have the DLC coated exhaust cam buckets. These will need to be purchased to do the install due to how the cams are designed tolerance wise. So make sure you or your installer are aware of this when opening the heads.


These are a mild 263* cam, so as you can see we have more room to make some power with a cam that is more aggressive.