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NigelStu

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NigelStu last won the day on April 20

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  1. Wing or Spoiler? If spoiler, just grab some sheet metal, plastic sheet, thin wood and cut to fit and rivet to your trunk lid (or flip your lid) If you are talking a wing/air-foil, check out Wingmen Aerodynamics https://www.facebook.com/WingmenAero/ Contact @hornerevan on here, or via FB. I have one of their wings, and am impressed.
  2. ^Only changes between RE71Rs and ZIIIs were tire pressures and aero setting. RS4s were last year w/o aero and more RR toe-in. If I can manage to get to the track for testing RS4 vs. ZIII, it'll be with same alignment and aero settings so I can get a clear difference in how the car behaves with the 2 tires.
  3. My team has had... issues.... with the RS4 in the wet/cold (2 big spins and 2 crashes that involved spinning from the back end stepping out with barely noticeable warning and no potential to catch for us mere mortals, and a few 'fun' moments in my Miata on the street/track in the wet). RS4s need heat to work well on my cars. Or maybe on the E36/Miata (with stupid wide tires) in general and it is difficult to get the heat when its cold and rainy. I found the RS4s to be very 'peaky' near grip limit when cold - minimal warning before limit is reached and significant grip drop-off. Now when its hot out, they work very well, seem to enjoy abuse (seem to work better when they are run with some decent slip angle) and last a long time. reasonable control at limits (when hot) with a window of slip angle that the tires can work in. Still a bit of a quick drop-off on the far end. I have not researched specifics, but I would expect the RS4s to have much stiffer sidewalls that want be be un-flexed (so will 'snap' back in place if sidewall is loaded up). Basically best tire if your divers tip the scale towards hoonigans who just go out and push the car/tires until the tires scream in agony and maybe back off a bit. Note that this is with a 255/40 tire on 9" wheels, running with some stretch (245 on 9 or 255 on 9.5-10) may make the tire more consistent in all weather due to the sidewalls being pre-loaded (can't grip, load and try to snap back to unloaded). ZIII - have not had in the wet yet. We ran them at Charlotte. Car felt more compliant, easier to place the car with fine steering inputs, softer slip-angle/grip peak, compared to RS4s. Wear was good, especially considering all the toe-in we ended up with (front tires have plenty of usable tread left). Car was reasonably quick at Charlotte with relative to other cars, good grip through the various speed corners, good tactile feedback. Braking felt more controllable. These tires feel like they need to be driven by someone who knows what a tire slip-angle/lateral grip chart looks like, can tell when they are within the optimal slip-angle and can back off from over driving when they feel they are going beyond the peak and into the drop-off zone. Granted, I have not done any back-to back testing between the 2 (RS4 vs ZIII) to compare lap times and feel in the same conditions. There is potential I may be able to do so in next few weeks (fingers crossed). I have done some back to back on same day between ZIII and RE71Rs. RE71Rs have more grip/speed all the way to the cords than the ZIII have in their 2nd heat cycle with plenty of tread left. ~1 second delta that required a small setup change, tire pressure adjustments and driving style change with ZIII to get that close. If you go with RS4s, I'll be very curious to hear about our experience, since I was the one asking YOUR team about tire pressures at Charlotte.
  4. Switching over to new wheel/tire package and have enough of the new ones I don't need to previous sets for spares anymore, time to clear out. BMW E36 fitment (5x120, 40 mm offset) 17x8.5 - would make a great set for a new team, team looking for more spares, or team wanting to move up to 17" wheels as a complete set. Have 8 wheels total. 6 with mounted RS4s 255/40 with lots of tread left - 4 are very limited run time, other 2 show some wear, still have tread depth at shoulders - all ready to run for at least a whole race weekend, probably a few. 2 with mounted direzza ZII star-spec 255/40, usable tread left Couple wheels have some inner rim bend that makes balancing the wheels a bit difficult (needs more weight than I'd prefer to use). Good emergency spares or possible to fix them. Have 4 additional RS4s with very good tread left, 2 unmounted, 2 currently mounted on wheels I am keeping (tires with "OW#" on them) but could pull them off if someone wants them. $1800 for the 8 Kosei and 8 mounted tires $100 each for the extra 4 RS4s Willing to split things up. Pickup in Commerce MI (zip 48382)
  5. Paddy had been drinking at his local Dublin pub all day and most of the night celebrating St Patrick's Day. Mick, the bartender says, "You'll not be drinking anymore tonight Paddy". Paddy replies "OK Mick, I'll be on my way then." Paddy spins around on his stool and steps off. He falls flat on his face. "Shoite" he says and pulls himself up by the stool and dusts himself off. He takes a step towards the door and falls flat on his face. "Shoite, Shoite!" He looks to the doorway and thinks to himself that if he can just get to the door and some fresh air he'll be fine. He belly crawls to the door and shimmies up to the door frame. He sticks his head outside and takes a deep breath of fresh air, feels much better and takes a step out onto the pavement and falls flat on his face. "Bi'Jesus... I'm fockin' focked," he says. He can see his house just a few doors down, and crawls to the door, hauls himself up the door frame, opens the door and shimmies inside. He takes a look up the stairs and says "No fockin'way". He crawls up the stairs to his bedroom door and says "I can make it to the bed." He takes a step into the room and falls flat on his face. He says "Fock it" and crawls into bed. The next morning, his wife, Jess, comes into the room carrying a cup of coffee and says, "Get up Paddy. Did you have a bit to drink last night?". Paddy says, "I did Jess. I was fockin' pissed. But how'd you know?" "Mick phoned, . . . You left your wheelchair at the pub."
  6. ^or get fancy with data acquisition and some MAP/pressure sensors - find the biggest delta from under/over the hood and put the holes there.
  7. With that many hours on the studs, I would just replace the whole thing the studs are installed in. It's probably time.
  8. @skierman64 - got any hard-shell tacos in your kitchen cupboard? Take 2 of those, place one on the top of the X w/ mouth down, place the other on the bottom of the X w/ mouth up. Edges get welded the the X, top and bottom/inside and outside of the door bars. That is the idea to add strength to the intersection. @mcoppola - post up a pic of the gussets you've made.
  9. Finished up post-Charlotte component check-over and nut/bolt torque check. Replaced left front control arm (ball joints that didn't feel great). Determined my toe-in from Charlotte was due to left tie-rod slowly working itself tighter/shorter throughout the race - assumption based on not being able to find any failed/bent/broken/out of place parts and that lock nut not taking much effort to loosen up. (Those lock nuts/collars apparently need a more torque than I snugged it down to after that at-track toe adjustment). Cleaned and paint marked all the things related to suspension up front. Testing Saturday at Gingerman so I can easily check all the paint marked stuff and see if there is something else not quite right that in the suspension, and to use up the rest of the rubber from CLT that wont make a 10 hour race.
  10. https://www.u-pullandsave.com/cars-for-sale/1986-mazda-rx-7/6830023?fbclid=IwAR2g4UqiYj2AlYeUY_Q2axbEC1FS2HSTqcF-l1hfRcTMPCL47Hyo9wPdWRw I was just there this past weekend. Just sitting there waiting for a home.
  11. Rear Seat mount bolt backing plates (3:25-3:30 in video), I'm not liking using the harness mount tabs - not enough surface area. Better to make plate that'll do a much better job of spreading any loads and not tearing through the floor.
  12. Pulled front tires off to find (what I thought would be incredibly obvious) what was causing the 1-3/8" toe in from Charlotte. Pulled out spare tire rods and knuckle to do visual comparison. Scratched my head as I'm not finding anything obvious... Will need to do a complete front suspension tear-down and inspect all the things. But that'll have to wait until the following week since One Lap of America starts Friday.
  13. 313mph! lol - total data error on that one, line trace looks like it went up to the press boxes and then back down to S/F.... Real numbers, it looks like on a few laps (likely great line trough Nascar 3/4 plus some good draft and going deep into turn 1), ~130-131 mph just past S/F. That was early in the race. Near the end of the race, top speeds were down in the 120-122 range, and was generally happening entering 3/4, not at S/F. I think the 1-3/8" toe-in the car picked up over the course of the race might have impacted our top speeds.... I've watched a lot of video, no tell-tale actions/incidents that could have bent something in one shot has been found, car/tires shows zero signs of contract. Reference point between steering wheel and car looks to gradually change throughout the race. Obviously have a sub-optimal part on the left front; that track was brutal and was certainly taking advantage of a weak spot.
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