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jthom5147

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Posts posted by jthom5147

    Modified Stock Transmission Mount for RB25 5 speed

    in Nissan RB Forum

    Posted

    A quick way to tell: look at the shifter housing. If it is parallel to the tail shaft then it’s a 71c (commonly known as rb20 trans, but found on RB25DE). If the shifter housing slopes back toward the ground then it’s an RB25DET trans. Side by side the difference in size is obvious, in photos alone not so much.

     

    you could swap your RB bell housing onto a 240sx 5 speed from a KA car and it’ll move the shifter back.

    1972 240z Price Check?

    in Price Check

    Posted · Edited by jthom5147

    Your car needs work. But l would wager that the other chassis needs much more work. Do yourself a favor and do some rust clean up so it doesn't get worse, take a deep breath and then work on what you can when you can.

     

    Everything about an old car of any sort isn't cheap and you won't get your money out of it either, we do it cause we love Z's. You'll end up hating it if you're not doing it for the fun of it (like trying to make a 50 year old car your "daily" and keep it running properly).

     

    Edit: maybe I'm biased by the 5-years-ago Z prices, but even what I've looked at lately that other car is a ~$3000 or less car on my local craigslist, and I wouldn't pay more than $1500 for it. If it were a running turbo motor in the chassis, I'd pay $4

    RB25DET Crank with no key

    in Nissan RB Forum

    Posted

    Nope. Sounds like you connected the starter wire incorrectly or your Z wiring isn’t what you thought. 

     

    Double check your wiring. Use a volt meter to wire the starter wire to something that’s only hot when the key is turned to the right position.

    RB25DET Vacuum source and Alternator wiring schematic

    in Nissan RB Forum

    Posted

    Waste gate vacuum attaches between the turbo and the throttle body. Outside of that, location really doesn’t matter that much. Closer to the turbo is probably safer. Most internally wastegated turbos have the vacuum reference on the end of the compressor housing outlet before plumbing starts. The RB25 is no different except it first goes to a boost control solenoid.

     

    You’re supposed to connect the brake booster the bigger hole on the underside of the manifold in the center. Unless you’re not in the US, It’s BSPT, so use the nipple that came with the manifold or have it re-tapped to a common pipe thread. I retapped mine for 3/8 NPT and am using it for my megasquirt IAT; since I’m not running a brake booster.

     

    10mm ring gear to 12mm carrier

    in Drivetrain

    Posted

    I’m having a vlsd installed in a 3.7 z31 case. The vlsd I bought was supposed to have 12mm bolts based upon what the internet says... which is always right...

     

    The 3.7 ring did have 12mm bolts. To take up some of the space, my fabricator turned some bushings to press in. 

     

    There were no 12 x 13 units available on eBay, so you’re lucky with the 10x12.

     

     

    2AC34DE5-3D9E-4EC0-BB48-D04A65302928.jpeg

    Rb30??

    in Nissan RB Forum

    Posted

    Big Phil has some stuff on his YouTube channel.

     

    essentially there is no factory RB30DE, only an RB30E (sohc). The head on an RB30D is a head from certain RB20/RB25 mated to a 30 block.  There are other requirements such as running oil lines for VCT, etc.

     

    youll find a bunch more info on Aussie sites as an “RB25/30”

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