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HybridZ

RTz

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Posts posted by RTz

  1. Still unanswered is how the other FI systems handle correcting for changing altitude (my original question in this thread).

     

    Its commonly done through a dedicated MAP sensor and interpreted through a user definable 2D map to trim the base map. Not ground breaking stuff.

  2. After a heap of procrastination, I decided to have a go at a carbon fiber plenum...

     

     

    CFPlenumRearMini.jpg

     

     

    CF has a number of attractive qualities that make it a nearly ideal candidate for manifold use. Aside from the obvious weight and thermal advantages, it has a nearly unlimited fatigue life. Fatigue resistance is one of my primary motivations as a boosted plenum is subject to significant stress. A well built CF plenum should survive many lifetimes. Add in nearly infinite shaping possibilities and an audible resonance that can't be duplicated by any other material.

     

    Of course CF comes with its own drawbacks, mainly cost, manufacturing complexities, and a limited heat range.

     

    Anyhow, the first step is to build a plug that mimics the final shape. A mold resembling the 'silhouette' was constructed, filled with 8lb expanding foam, and the plug extracted...

     

     

    1.jpg

     

    2.jpg

     

    3.jpg

     

    4.jpg

     

    5.jpg

     

    6.jpg

     

     

     

    Next up, hand shaping...

  3. It's certainly not Open chamber.:shock:

     

    Both of those heads are, in fact, open chamber.

     

    Go back to post #1 of this thread. Picture 1 illustrates an open chamber. Picture 5 illustrates a closed chamber. The semi-clean aluminum (near the bottom of the picture) is the quench area (If an appropriate piston is used).

  4. Justin,

     

    10's are what I see most often (F&R). I've also used 10's exclusively on my cars. Never did the math but, before installing 8's, I'd want to make sure they didn't coil bind... 6" stroke with an 8" spring sounds like a problem.

     

    You're welcome to stop by and have a look at my car.

  5. Normally, when I list something, I do not expect to be compensated by paypal. I don't advertise as such and I don't want to be bothered with it. As a seller, paypal sucks. Paypal is buyer convenience. That's my opinion, like it or don't.

     

    If you ask if paypal is an acceptable payment method (instead of just assuming so), I might accept. I might also ask you to cover the fee's. This is called negotiations. If you don't agree with my terms, either counter, or say "no thanks". There's nothing illegal or unethical about negotiating terms. It's part of life.

     

    P.S. Petty almost always swings both way's. Funny how often people miss that part.

  6. Hi,

    I'm 18 and just got an old 82' 280zx and its got real trouble starting. I got it servised and whatnot but a mate told me the other day that he reckons it's a faulty temperature sensor. And as a result its not injecting properly to start or something...

     

    Does anybody have any ideas why my 280 only starts once every 15 goes?

     

    The temp sender for the gauge has nothing to do with the temp sensor for the EFI. They are completely unrelated/independant of each other.

     

     

    Thread moved to Troubleshooting, and retitled.

  7. A or B is better?

     

    The step you speak of is to be found in nearly every production car ever produced. Its cheaper to manufacture and the power trade of is usually marginal.

     

    Some people will tell you that the anti-reversion qualities of "A" may offset the slight penalty in high RPM flow. Some (successful) people do it intentionally.

     

    JeffP is making well past 600 hp with, what I'm told, is about a .050" step.

     

    Hope this helps.

  8. I know this might be slightly off topic but is there any way that i can change my user name? When i made it i did not put much time into it at all cuz i was just worried aout getting my car fixed but now i am on the site at least twice a day and im kinda sick of looking at my name.

     

    Sure I'll change it.... if you promise to stop with the run-on sentences and capitalize the word "I" :mrgreen:

     

    PM me with your new name request.

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