The Ted Race Team: Because Racecar

Discussion in 'Hangar Talk' started by Ted, Dec 18, 2020.

  1. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    Did get those front calipers (with pads) on the car today. I haven’t yet got new brake hoses coming (that’ll probably be a tomorrow order) but if I still haven’t found rebuilt rear calipers by then, I may bleed the fronts and then just use hydraulic pressure from the brake system to force the rear pistons out, assuming other methods don’t work.
     
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  2. Half Fast

    Half Fast Final Approach

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    What pads did you get? I always ran Hawk Blue in the front and Hawk Black in the rear as that seemed to give reasonable brake bias without needing an adjuster.
     
  3. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    I got Hawk Blues front and rear. When I searched, I couldn't find the Hawk Black rears. I looked for that first since it's what you'd suggested as a proven good combination. But, I guess these cars are getting harder to find parts for all around...
     
  4. Half Fast

    Half Fast Final Approach

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    Yeah, probably true. You need to connect up with some RX7 racers, do a little networking, and learn how people are keeping them on the track these days. My knowledge is badly outdated.
     
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  5. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    Also got the hoses on the way, so I'll at least have that.

    I should join an RX7 forum and start poking around there some...
     
  6. Half Fast

    Half Fast Final Approach

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    Be sure to sign up with Mada Motorsports. Those folks are VERY helpful and they know most of the Mazda racers in the country. They were a terrific resource for me when I was racing.
     
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  7. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    It’s been a rough past couple of weeks here. There wasn’t much on the calendar this afternoon and my wife had the kids out, so I took the afternoon to be in my shop and have some zen time. Most of this was focused on the RX-7.

    I had the front calipers on that arrived, but I also ordered new brake hoses all around. Put those on the front calipers as well as replaced the one going to the rear axle. After that I took care of replacing the fuel hoses around the rear of the car from the tank, to the pump, and up forward as well as replacing the filter. The old ones were bad enough that they started leaking when I touched them. There are still a couple at the tank that I have to drop it to replace, I’ll get them. But that can wait until after first drive.

    Then there was the oil cooler hoses. This ended up being really simple. I cut the crimping ends off the existing hoses and the fittings are just fine. So new hoses are coming and I’ll use hose clamps. That’ll be sufficient for the pressure. Once the hoses are on I can try starting it with the rebuilt carb.

    So now, it’s really just two things before I drive it:

    1) Mounting/wiring the battery box in the interior
    2) Rebuilding the rear calipers.
     
  8. Half Fast

    Half Fast Final Approach

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    Be sure moving the battery to the interior is allowed by your sanctioning body. We weren’t allowed to do that.
     
  9. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    It is, that’s why I’m doing it :)

    Well that and because it makes it easier for me to hook up the oil cooler hoses with where the new one is.
     
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  10. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    Oil cooler hoses are on, which means it could run without making an enormous mess. The JIRA tickets are getting checked off…

    I haven’t run the car since rebuilding the carb, so that will be a whole other question of whether I screwed that up. I don’t think I did though, but it is a complicated thing. Once I get the battery box in I’ll probably start it in case there are other things I need to order or repair.
     
  11. Half Fast

    Half Fast Final Approach

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    Have you replaced the trans and diff fluids? IIRC, I was using Redline for both. Once you get it moving, see how well the LSD is working and whether it needs rebuilding. It has non-stock 4.88 gearing.

    FYI, RX7 transmissions had notoriously bad synchros, especially 3rd gear. At race speeds, plan on heel-&-toe double clutch shifting.
     
  12. Spring Ford

    Spring Ford Line Up and Wait

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    Who would consider anything else?
     
  13. Half Fast

    Half Fast Final Approach

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    Showroom stock racers.
    ;)
     
  14. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    I changed the trans and diff fluids over this winter. I went with Mobil 1, but may put something different in after a race or two. The first goal was just to get rid of the old stuff in there. At this point all the fluids are new, all rubber is new (tires, hoses, master and slave cylinders, bushings...). With it in the air, the LSD seems like it's working well. We'll see what it does when driving it.

    But you really hit on my plan there. Get it driving, register and drive it, see what needs adjustment and tweak accordingly. Try to get to the first track/race day prepared with a car that I think will survive, learn and adjust as appropriate. We were looking at the Lemons schedule over dinner and it looks like starting in August onwards there are several events we might be able to make, and I'll be looking at closer events as well.

    One thing with Lemons is that they apparently like weird and goofy ideas to get more power. Being a fan of Engine Masters, this therefore has me thinking about adding a salad bowl:

    upload_2022-6-19_21-25-27.jpeg

    Yes, it's a real thing, it makes horsepower (on the dyno). No, I won't do it on the RX-7, it's not practical at all and I'd have to mangle the hood, which I don't want to do. But you are allowed to make interesting modifications so long as you don't exceed your budget for purchase/mods. Porting would be allowed, so that may be something I look at at some point in the future. Not now, of course - but things to consider for the future.

    Thanks for that tip. I have a lot of mechanical sympathy, and definitely follow the motto of "In order to finish first, you must first finish." I double clutch the truck quite a bit. :)
     
  15. Half Fast

    Half Fast Final Approach

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    Does Lemons require a competition license? Do you have to attend a racing school?
     
  16. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    You have to have a Lemons competition membership, but that's it.
     
  17. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    I wired up the battery in the cabin and, well, I couldn’t resist starting it. :)

    https://youtube.com/shorts/W0j_T1N1Cow?feature=share

    I was surprised at how well it idled before any adjustments. I adjusted the idle to around 1000 RPM since it should be a bit higher with the underdrive pulley. When I got it running the first time it went up to around 5000 RPM and it wouldn’t come down no matter what I did. The carb was also pretty rough after sitting (no surprise).

    So now I better get moving and get those rear calipers rebuilt - I want to drive this thing! :D
     
  18. Half Fast

    Half Fast Final Approach

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    Yep, still sounds like a race car!

    :D
     
  19. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    Because racecar! :D
     
  20. Half Fast

    Half Fast Final Approach

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    If you have never raced before, I highly recommend you attend a school. Skip Barber or equivalent would be a good investment.
     
  21. Ted

    Ted The pilot formerly known as Twin Engine Ted

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    That would also be a really fun date weekend, like when did the BMW motorcycle course. I like this idea…
     
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