Jump to content
HybridZ

johnc

Members
 View Profile  See their activity

  • Posts

    9842

  • Joined

  • Last visited

  • Days Won

    56

 Content Type 

Everything posted by johnc

  1. johnc
    I sent you the wrong parts or the supplier sent me the wrong parts. I'll send you the right parts. EDIT: Just checked my stock. All the supposed 280Z threaded collars I have are 240Z parts. I just ordered a bunch of the correct parts and I'll overnight them up to you when I get them in my hands. I guess I need to mic them from now on when they come in.
  2. johnc
    Its not unsafe per se, its not as safe as it should be. Roll bars are a safety item and should be done right. There also might be an issue with your shoulder harnesses being pushed towards the inside if the main hoop is that far from the side of the car.
  3. johnc
    Just need a fixture on top to hold the top of the tube and bolt the bottom of the strut to a plate. Then put a bottle jack on top of a scale under the spindle. I think you'll find that's a pretty stout casting. If you really want to check it you can bolt the steering arm, ball joint, and LCA in place. I'll bet you'll find more flex in those three components then in the spindle casting.
  4. johnc
    Get the right roll bar for your car or have someone make it custom.
  5. johnc
    Each mounting point is limited to 144 square inches.
  6. johnc
    With all the ozone in the air, you can't expect a tire to last more then 7 years from the date of manufacture. RV, trailer, and motorcycle tires fail typically via tread separation long before they wear out the tread.
  7. johnc
    There are four levels to non wheel-to-wheel track events with SCCA: Each region does it a little differently so contact your local SCCA folks and see where you fit in. For PDX, there's no vehicle classing so just show up and have fun.
  8. johnc
    That kind of stance is usually caused by torquing the suspension components while the car is still on jackstands - in particular the inner pivot for the from lower control arms.
  9. johnc
    I dunno... in thirteen years of racing and pulling from .85 to 1.2 lateral Gs at autocrosses and race tracks the front struts on my 1970 240Z never had a fatigue failure and neither Erik nor I had a camber loss issue (based on tire temps) that could remotely be tied to spindle flex. The hub/bearing combo is a different story. Sometimes a mod that looks good on the Internet just adds weight to the car.
  10. johnc
    I've seen a number of cars with the strut bridge but I've never really known a reason to install it. I've yet to see a bend or failure in that area that wasn't caused by hitting something - hard. I'm of the mind that the welding itself would cause more distortion in the alignment of the spindle to the strut tube then any inherent flex that might exist at 1.25G lateral supporting, what, 600 lbs. vertical?
  11. johnc
    No. As the shock/spring compresses the camber plate/insulator must articulate to accommodate the change in angle. Its this resistance to articulation caused by the poly camber plate that increases stress on the shock shaft.
  12. johnc
    I know of two cars that had the shock shaft snap right at the bottom of those top hats. Unless they've changed the design, the poly is too stiff and does not allow enough articulation at the upper mount of the strut. This causes flex and a fatigue failure at the thinnest point of the shock shaft. The stock rubber insulators have enough flex in the rubber to handle the articulation and real camber plates have a monoball.
  13. johnc
    Each one was custom made and took about 3 weeks to get. Jere brazed the primaries to the flange and put a lot of extra meat there so you could port match the headers to even heavily modified heads. Glad the side axles worked. So far no problems after a couple years. A couple 510 guys have had them pull out but that's a recurring issue with heavily lowered 510s that use snap-in style side axles.
  14. johnc
    About four a year. I sold two for them last year and I was 50% of their sales.
  15. johnc
    For SCCA the minimum mounting plate thickness is .080", not 3/16". Also, the maximum mounting plate area is 144 square inches and no longer then 15" on any one side. Again, the roll bar in your picture above is not allowed at any SCCA sanctioned track events. You can probably run it at a SCCA SOlo2 event.
  16. johnc
    I've tried a few times to buy the fixtures and jigs from Stahl when they announced they were ceasing production. Couldn't ever get a price from Jere. He's been pretty sick so I guess its the end of the line for those headers.
  17. johnc
    Who will you be racing with (NHRA, SCCA, NASA, ...)? Get the rule book. The bar in the photo above does not meet SCCA or NASA rules. It might be OK for NHRA.
  18. johnc
    I'm just a chassis/suspension guy. Engine crap should be kept in the dyno and away from the track.
  19. johnc
    I've done (do) data logging at the track but generally not engine parameters. Track time (at least to me) is for setting up the chassis.
  20. johnc
    And through all the wires connected to the chassis as grounds. Its a circuit.
  21. johnc
    What sub frame mod?
  22. johnc
    A rear steer car (steering rack behind the front wheel center line) can be setup with better Ackerman angles. Unless you are building a pure race car, can explain Ackerman in depth, and know what your car will need, there's no point on making the change. Also, S12 strut suspension parts are no better or worse the the S30 parts.
  23. johnc
    Current Tokico springs are red.
  24. johnc
    The initial look at the LD28 impeller says this won't be cost effective. There's a lot of programming involved in getting the milling correct.
  25. johnc
    Well... I sell hoods for the S130.
×
×
  • Create New...