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  1. Another LOWFATZ update. Enjoy.

    #1
    Nismo Fiesta Director Milo's Avatar
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    Default Another LOWFATZ update. Enjoy.

    Sorry, it's been a while. With me and my local team hosting another Nismo Fiesta, time is usually turned towards that. Now that I have some time, I am turning my time back to the project.

    ************************************************** *******

    With any large project comes some bad news. My bad news was in the form of the rear subframe. The rear subframe that we purchased from a local club member turned out to be bent. Being bent, it would have thrown off all of the precise suspension angles we were hoping for. This was the powdercoated gold subframe, by the way. I had done up another subframe for another project car, but in red. So we ended up having to swap all the subframe bushings into the red subframe assembly, which was a pain.

    Our new subframe.


    Some SPL Version 1's that we had laying around. Later on, we will upgrade this and everything else to the V2's (aka, Version 2's from SPL Parts.


    I opted to have SPL Parts install their Monoball Bushings into our rear spindles. These bushings are the premier bushings available to the Z32 market. Although these can be on the pricey side, I feel as I always have, that you cannot beat quality and reliability like this. Note that these can translate a little more road noise to the vehicle, as well as vibration. But, for our purposes of an all out track car, this was the best option for us over any other aftermarket bushing.

    The stock spindle with the bushings installed.


    A closer look at the SPL bushings.


    So moving on to a little more weight savings.....

    Although the stock hood is made of aluminum for weight savings from the factory, some portion of the stock hood were obsolete thanks to the addition of the Aerocatch hood pins. Previously, we deleted the hood latch, cables and hardware. We recently also, opted to remove a few more pounds from the stock aluminum hood as well.

    Started with removing a few sections of the hood catch. The stock hood has a steel catch inside of it, sandwiched between the underside skeleton and the outer aluminum skin. My plan was to cut away as much as possible while still keeping a little strength left in the panel. We have to do this process on two different hood. We have a vented hood and a stock hood for the car, usage depends on weather conditions, of course.

    You can see the hood catch section we are opting to remove.


    A closer look. Notice the rivets. This made it "interesting" of a removal process.


    Another portion of the skeleton that we cut.


    And another.


    Our little pile of hood removal debris accumulated to another 3.1 lbs of saved weight per hood. We are still wondering if it was worth the extra 4 hours of cutting to get to this savings.



    And now, just doing a few more little trick things to make life easier on us when we are stuck out at those hot Texas track days.

    The stock Z32 for the US market is great for what it is. But one thing that I always hated about it was that if you were going to be constantly pulling plugs to swap them for any of a dozen good reasons, you had to pull the balance tube which just seemed.....well poorly thought out. Good but could have been a little better.

    The stock Z32 plenum.


    The J30 plenum was essentially our same plenum but evolved. It allowed for a balance tube that moved back the tube for a cleaner and easier access to the coilpacks. I always liked this idea, but one thing that sucks about the J30 is that it is riddled with brackets. From my experience with plenum polishing/porting/chroming, I had a lot of experience chopping off brackets and smoothing out plenums. So we applied that. Basically, our goal was to take the J30 plenum and use it on our project. Sadly we cannot just bolt up the balance tube, we have to use the plenum and hack away all the additional brackets and threaded bungs.

    A shot of the J30 plenum.


    A comparison shot. Notice the balance tube and then all the "extras" on the J30 plenum.


    The J30 balance tube by itself. The X's account for everything that I have to remove.


    The stock J30 plenum. Notice all the items that will need removal.



    The stock J30 plenum after a quick bracket removal section. We still have much more to go on the plenum. We have to smooth all both the plenum and balance tubes out. Send the plenum out to Extrude Hone for it to get honed. After that we will have EP Racing put a thermal coating on both item to help battle heat soak in aluminum/silica cast plenum. More to come on this part as we continue to move on.


    And on to the fun stuff.


    Mitch over at EP Racing has a full plate on some amazing builds right now but still managed to get a little work done for Project LOWFATZ.

    Our pistons were a set of custom one offs to generate the power we were looking for in an naturally aspirated VG30DE format. Something that has never been done to our knowledge. So, in a sense, we are writing the playbook. Compression is squishing at 12.5 to 1.


    A few comparision shots of another AM TT pistion vs our custom NA pistons.



    A new EP Racing twin piston squirter design that is finalized as of recent. Expect production soon. The design is set to allow maximum lubricity for both low and high points, hitting the underside of the piston as well. Previously the only cure for high hp TT motors looking for lubricity at the critical piston to rod point, was to utilize an NA squirter. Now with the new design, it improves upon this concern with one squirter aimed at this point and the other in the traditional TT positon.


    I recently picked up a set of new tranny gears to have both coated by EP Racing and installed. The coating will promote lubricity and anti-friction. These are our gears after a few sandblast sessions awaiting the coating.


    Now with the coating applied and freshly run through a few heat bonding cycle, the gears are cool to the touch and ready to go.



    Recently we picked up a few different clutches, trying to find the right combination for the anticipated power. We were donated a few different clutch setups by sponsors. A vendor was nice enough to donate us an OS Giken clutch assemby. We are still unsure if this will make it into our project or not as may be overkill, but none the less it is an impressive assembly and we appreciate all donations.


    Thanks to all for the patience. More updates coming soon.

  2. Re: Another LOWFATZ update. Enjoy.

    #2
    ZSport Guest
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    Very impressive and interesting.. Keep us updated on your projects!

  3. Re: Another LOWFATZ update. Enjoy.

    #3
    ZSport Member freddy 350z's Avatar
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    this build is so BADASS! one day, i will to have a build this epic.

  4. Re: Another LOWFATZ update. Enjoy.

    #4
    ZSport Member freddy 350z's Avatar
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    how much power are you expecting to get out a na vg30?

  5. Re: Another LOWFATZ update. Enjoy.

    #5
    Nismo Fiesta Director Milo's Avatar
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    the goal was to push around the 300hp range.

  6. Re: Another LOWFATZ update. Enjoy.

    #6
    ZSport Member freddy 350z's Avatar
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    very nice.

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