Recent content by 69427

  1. 69427

    1939 Dymaxion Tribute Vehicle

    "Canned ham trailers". I had never heard that phrase before, but it makes perfect sense to me. 😀
  2. 69427

    Weight reduction: Running out of ideas.

    Yeah, everything from the transmission crossmember back is aluminum, with stock looking polished aluminum tips. (The S bend hotter pipes from the header collectors to the trans crossmember area are still steel.) They're slip fits at the crossmember area, but the mufflers are attached to the rear...
  3. 69427

    Weight reduction: Running out of ideas.

    If I find myself with excess free time I might think about making a pair of aluminum glasspacks for track days. The current aluminum mufflers weigh 10# each (compared to 16# each for the previous steel turbo mufflers), and the glasspacks might be in the 6# each range. For all the effort I'd...
  4. 69427

    Weight reduction: Running out of ideas.

    Excellent suggestion. (y) Until I figure out a satisfactory way to route coolant lines past/rearward of the halfshafts, I might look into trying to package a small radiator into the passenger fender, near the louvers (moving weight rearward and to the right), and then finding a narrower than...
  5. 69427

    EXTERNAL AERODYNAMICS

    Jim, thanks for pulling these together for review. I'd forgotten about many of them. The yellow '73 (IIRC) with the wool tufts is a test that I'm trying to do to my car this summer, and focusing on the side skirt area. Years ago I removed the stock under-door panels (I can't remember the...
  6. 69427

    Intake manifold welding (on the car): Am I lazy doing it this way??

    Very true. I'm still getting used to the braking improvement from all the weight reduction. Last weekend I found that even though I was going into the corners as deep as I "dared" (ie: @ full pucker) before braking, I found that the car slowed much faster than I kept thinking it would. and I...
  7. 69427

    Intake manifold welding (on the car): Am I lazy doing it this way??

    It's out in the public domain now, so I think my chances of financial enrichment are pretty slim now. :giggle: (And, in all honesty, I'm pretty sure I read this used somewhere before.)
  8. 69427

    Transverse rear spring rate adjustment ponderings.

    Due to packaging constraints of a C4 suspension under a C3 frame I've never been able to package a rear sway bar under my car. I've been fortunate that I've been able to get the car to handle decently by just tweaking spring rates and the front bar.
  9. 69427

    Intake manifold welding (on the car): Am I lazy doing it this way??

    Well, no engine street-driveability update yet, but the engine ran great at the track day Sunday. No higher RPM power loss noticed with the plenum divider back in the manifold. I didn't expect to see much of a difference as I recently learned from a David Vizard video that the divider...
  10. 69427

    Transverse rear spring rate adjustment ponderings.

    Spring update: Had a track day yesterday, and things went exceedingly well. Nothing broke, and the car was truly enjoyable to drive fast. The new rear spring (Thanks again Jim (y) ) worked very well, and survived the abuse. The car was very well balanced, with just a hint of controlled oversteer...
  11. 69427

    Intake manifold welding (on the car): Am I lazy doing it this way??

    I'm thinking on trying another item to hopefully help the low speed drivability of my car. My present gearing setup (M21, 3.08 rear gear, and a light flywheel) is not ideal for smooth takeoffs from a stop, and while I expect a slight improvement from the plenum change, I'm thinking if I can slow...
  12. 69427

    Front brake rotor/hub heat insulator/isolator.

    I agree. But remember, thin titanium is more than a shim, it is a significant thermal impedance between two objects. The shims are an additional effort to keep the wheel bearings alive during track days. My front spoiler lower section is shaped to direct air to the lower control arm area, and...
  13. 69427

    Front brake rotor/hub heat insulator/isolator.

    I appreciate the input, guys. (y) Insulating/spacing the five areas at the lug studs would thermally be the best solution, and I can't post a definitive law of physics argument against it, but as only an electrical engineer and not a mechanical/structural engineer, I've been defaulting towards a...
  14. 69427

    Intake manifold welding (on the car): Am I lazy doing it this way??

    Well, the temps got above 60* today so I started the engine, and to my relief no odd noises or smoke out of the tailpipes, so it looks like there wasn't any major trash inside the intake that escaped all the vacuuming I did during the grinding and filing stage. Once things warmed up a touch I...
  15. 69427

    Front brake rotor/hub heat insulator/isolator.

    While waiting around for the weather to warm up so I can get back to working on improving the idle quality of my antique, my mind wandered to a short project to do in the meantime. I'm thinking on making a couple .040" titanium or stainless (whichever machines easier) rings to insert between the...
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