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LeonV

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About LeonV

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    Bay Area, CA
  • Occupation
    Mechanical Engineer

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  1. We run Conti EC Sports on the wife's Mini. They're a solid bang-for-the-buck tire although I'm not super happy about their ride quality. Don't shy away from Continental as a brand, they're one of the better ones out there along with Michelin and Bridgestone (the Firestones I suggested earlier are just re-branded Bridgestones).
  2. The thing about "summer" tires is that they absolutely out-perform "all-seasons" in the rain. All-seasons were designed for people that drive in snow and sub-zero conditions once in a while and don't want to install snow tires. Summer tires are designed for rain, as can be seen by their large grooves and sipes. These tire classifications are huge misnomers and constantly mislead consumers. Take a look at TireRack. They do a good job of reviewing tires as well as compiling consumer feedback into easily-digestible stats. I assumed your use-case is driving around town and maybe a bit of spirited driving so I filtered by "max performance summer" and "ultra high performance summer" (basically just avoiding "extreme performance summer"). The cheapest tire on there that I would recommend is the Firestone Firehawk Indy 500 (they're offering a $60 rebate through July 8th). I have a friend who runs them on his Chevy SS and has good things to say about them. I've personally run the BFG SC2 you mention and really enjoyed them, they're responsive and are typically cost-effective. The Dunlop DZ102 rode softer but didn't have the responsiveness of the BFG. https://www.tirerack.com/tires/TireSearchResults.jsp?zip-code=94555&width=205/&ratio=55&diameter=16&rearWidth=275/&rearRatio=35&rearDiameter=18
  3. What tire size are you looking at? All-seasons (no-seasons) will castrate the car, performance wise. Get a set of summer tires. I also do not like the Michelin AS3, poor grip and poor ride quality in my experience.
  4. Did you check your actual timing after you installed the 123? First thing I did after install was make a "setup map" with timing at 10Ā° everywhere and put a timing gun on the pulley. Timing was substantially off so I clocked the distributor until the gun showed 10Ā°. I can post my timing curve when I'm on my tuning computer.
  5. The P90 should already have the hole for a mechanical pump, it's covered by a bolt-in blanking plate. Now is a good time to install a 10lb flywheel, you won't regret it. šŸ˜‰
  6. No Calagarians that I know are heading down my way any time soon so let me know if you're ever in the SF area! No worries if someone else buys it, I'm just being opportunistic. šŸ™‚
  7. Ah, bummer. Let me know next time you're in the area, always good to meet like-minded people. I'll let you know if I can arrange pickup!
  8. Jim, I'd love to take that off your hands but shipping would be a killer. Although, I do know some people that go between Calgary and SF once in a while...
  9. Nice find! I have the same one although it has some battle scars. Not a lot of them around, especially NOS!
  10. You are correct, thanks for catching that. Everything else I said stands. šŸ˜‰
  11. Did it ever run with the 280Z tach installed? How did you wire it in? The coil + BW wire runs through the tachometer and if you didn't bridge that when installing the 280Z tach, you will not have power to the coil.
  12. PSI is a unit of pressure, not load. Load would be the pressure multiplied by the area that the pressure pushes on. Along similar lines, the gas charge is a pressure inside the damper, not a spring rate. The force exerted by the gas charge, and thus spring rate, depends on the piston damper rod size and pressure. This can be measured but you need to do some math if it's done using a hydraulic press, which I imagine is how that machine shop did it. For example: F=P/A (pressure measured in press / area of press piston) k=F/x (the above force is calculated at two positions around center of damper travel, difference in force / difference in damper travel = effective spring rate)
  13. LeonV

    Quiet Muffler

    It's a center-in, offset-out 2.5" muffler. I'll have a look next time I'm under the car which should hopefully be soon. The exhaust was done about five years ago so I may struggle to dig up a part number. A friend (@v12horse) recently had a shop put in a very similar system and may be able to contribute. Another buddy just put in some version of a Hush Thrush and while not as quiet as the Walker, it was suitable for him. I don't have any actual sound level data on these but the Walker is as quiet as it gets, I imagine. I was looking for an in-car video I had but couldn't find it.
  14. LeonV

    Quiet Muffler

    I told my exhaust shop that I wanted it as quiet as possible without sacrificing much performance. The system is a modified MSA 2.5" exhaust with a center resonator and a Walker Quiet Flow out back. It's perfect in the sense that it does exactly what I want it to do, keeps things quiet on long drives and nothing but intake roar when the mains come in.
  15. I had the same wheels years ago and bought some "mag-style" lug nuts from O'Reilly (Kragen at the time). They fit perfectly.
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