09-23-2015, 12:44 PM
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#1 (permalink)
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Track Member
Join Date: Jul 2015
Location: Glen Arm, MD
Posts: 872
Drives: 370Z
Rep Power: 16
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Jim Wolf Cam testing for the VQ37VHR -- Results inside!
When the time came for the 370Z Exhaust cams to be produced, we were more than happy to work with them to get a car in here and do some test work with the prototypes. After working with Jim Wolf for many years, we always jump at the chance to work with their new products as its always fun to see what they do.
The VVEL system is so well designed in this car, and intake cam is just not needed as an upgrade. We are excited to work more on testing the limits of the VVEL in the future but that is for a different post!
This is not an easy task for sure, but I think in the end the results are worth it, even more so as an add on to a motor build or a turbo set up when the motor is already out of the car.
PM ME FOR A PRICE ON THIS SET UP
The first Step in the process is to disconnect all the lines and wires that will connect the engine and transmission to the chassis, from there you will pull the driveshaft and all subframe mounting bolts, and trans mount bolts (With the engine cradle supported) and lift the chassis off the cradle.
Once that is completed, the next step will be to pull all the accessories and intake manifold from the engine to gain access to the valve covers.
With that done, you will now pull the valve covers and front cover off the motor. Then you will remove the VVEL Motors. (Make sure cylinder one is at TDC)
Moving on to all the moving components in the timing system, you will want to lock the tensioner in place and remove all the chains and gears from the front of the cams and be very careful about keeping this all in order, we used an empty table to mark and lay out each grouping of components to keep it all organized.
You will now remove all the cam cap bolts and the bed plate including the VVEL components. Be sure to keep all of this in order.
With all of that off, you will now work on the springs, we use a tool to pressurize the cylinders, and a simple spring compressor to pull the clips and retainers out. Repeat this process on all exhaust springs and replace it with the JWT springs from the kit.
Moving on, you will now want to place a small bead of RTV for the valve covers as it will need some time to set.
To install the cams, apply a liberal dose of assembly lube to the journals and set the cams in then apply lube to the top of the cams and place the cam cap assembly and VVEL assembly on. Torque it all down to spec and re-place VVEL motor on the rear.
From there you will assemble all the timing components and torque to spec
Reassemble the accessories and intake and drop chassis back over the cradle and bolt it all in.
These specific cams where a very conservative grind (Think of it as a stage 1) just to see how the motor would react, we are currently working on a set that will go into a Fast Intentions Twin turbo build, and are also working with JWT on some larger profile units so we can start to push it all a little farther.
Here is a comparison to the stock cam:
This car baselined at 298hp and 227tq (This was after an uprev tune, on a motor with a cat back and intake) after the cams the motor produced 309.5hp 258tq to the wheels. So the real star of this was the torque increase in the midrange as that is very noticeable when behind the wheel.
PM ME FOR A PRICE ON THIS SET UP
Feel free to post up any questions you may have!
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