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Thread: Blu's 818R

  1. #1
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    Red face Blu's 818R

    After 27 years of racing tin tops I decided to go topless.... sort of.
    I picked up my build late April 2018 after selling our 2 Spec Miata's. We ran SM for 5 years and had a blast, I must say i learned how to drive again, momentum racing is so much fun. 3 Championships between us including an invite to Mazda Shootout in California, what an experience, fun!

    My son went to play in the dirt with his GC8 Impreza. I bought a caged GC8 shell as well with the intensions of following him into rally, however the car was butchered from open class and too far gone for me to complete. So I sold it to a friend, lol.

    I have enjoyed reading the forums the past 6 months to gather information on the best way (for me) to build this race toy. So many talented people on here with amazing depth of knowledge, thanking all of you for that !

    As I am in Canada, I had to order the "Canadian Package" as it is the ONLY way to get it across the border, god love the wisdom of our government... enough said.

    We drove the 11 hours each way to pick up the kit. Was great to meet so many people and take the factory tour.

    My build order included :
    818 Race, powder coated white as all race cars should be. Red body.
    Because there was an amazing sale when I ordered the kit, the following arrived with it -
    CF Splitter, CF Diffuser, Cunards, Door Ducts, Rocker Panel extensions, Race Side mirror kit, aluminum shifter and [3] sets of rims.
    Items purchased not on sale, APR Wing, Wilwood pedal kit.

    So far I have been gathering and cleaning parts as I do not have a donor car. Between my yard, my sons yard and a very good friend I have enough parts to pick from. Additionally I have been powder coating all of the aluminum prior to assembly, so much aluminum. Most I have done myself except for anything large I have sent it out.

    Build will include the following;
    2004 USDM 2.5 turbo (turbo size still discussing) Goal is 350+ WHP on pump gas
    6-speed with LSD
    iWire harness with custom options
    Cadillac ATS 4-piston Brembo brakes all around
    12.8 rotors all around
    Moton 3-way adjustable damper suspension
    Dry sump system
    Fuel cell in passenger area
    AIM Data acquisition
    OMP HTE R seat
    (Considering the halo, still open to the concept and still evaluating as I am 6')

    Expected completion for first race April 2020, more than likely sooner however it will be test and tune only :-)
    Last edited by Blu; 01-03-2019 at 07:53 PM. Reason: Added transmission info

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  3. #2
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    Welcome to the family.

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  5. #3
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    Welcome! Good to see another R builder on the forum. Need pictures of that white frame!

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  9. #5
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    Welcome. It will be fun to watch your build.

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  11. #6
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    love the white frame, looks great.

  12. #7
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    I asked a good friend who is an engineer in IMSA for one of the Ferrari teams about Cadillac ATS 4-piston Brembo brakes and STI 12.8” rotors all around, here is his reply.

    So the Ferrari GTLM car has 48% weight on front, looks like the 818 is 40% based on the link you sent me.
    Ferrari has about 70% front brake distribution with the balance bar in the middle.
    Your suggested setup, with Cadillac 4 piston Brembo calipers front and rear, 1.65” piston diameter, would give 54% front brake distribution - similar to an Indy car road course setup. This is with 3/4” front and 13/16” rear master, as per the forum Hobby Racer setup.
    Initially I thought this was too much rear brake, but if your front weight is really 40%, this should be in the ballpark. The master sizes seem a bit small, you will have a long pedal, but a lot of force. I’d go for 7/8” front and 1” rear, this will give you a firmer pedal and less travel. And puts you at 57% front brake distribution, which seems about right. As you have big rotors all around (more stopping force), but larger rear clalipers (more stopping force, but more pedal travel), you will have just a bit more stopping force with just a little more pedal travel, for the same pedal force. So I’d stick with the bigger masters - as your car is lighter - it will be too easy to lock brakes with the smaller masters.
    If you have a floor mount pedal you have the same ratio as my car. If you have a swing pedal, they have a little higher ratio, meaning a little more travel, but less force.
    So I think you are on a good path.
    Note that the front distribution numbers are based on total stopping power - with the balance bar at 50%. So you can vary these numbers probably 10% on either side, but always best not to go too car from 50/50 on the bar - the geometry goes to hell.
    ------------------
    Considering I have lots of STI Brembos that need rebuilding, I am choosing to do the swap as the sale of the STI Brembos will easily pay for this swap. Besides STI Brembos use a leading and trailing piston configuration. Since I live north (road salt haven) the road Brembos are a huge challenge to rebuild with bolts not coming out.
    Rock Auto sells the remanufactured calipers for $140 I can buy new from the Chev dealer for $150.00
    Total for [4] calipers, Caliper hardware, Swap bracket kit, [4] 12.8 premium rotors is $1,100

    Thanks to Hobby Racer for sending me in this direction

  13. #8
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    FYI with the CP8350 4 piston AP brakes I am running (same caliper/12" rotors front and rear) and 3/4 masters. Depending on the tires and tire condition I am running I have been with in a turn from center both to the front and rear. I am really please with the pedal feel and stopping power.

    For the price the Caddie brake set up looks like a great value.

  14. #9
    Senior Member Hobby Racer's Avatar
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    Quote Originally Posted by Blu View Post
    Thanks to Hobby Racer for sending me in this direction
    You will not be disappointed with the Caddie Brembos! I love them and have not had to change my balance bar from its 50/50 position yet as it seems to be perfectly balanced. I would be cautious about running larger master cylinders as your pedal effort will increase. My pedal travel is only about 3/4" at the pedal which I find ideal for my heal / toe setup.
    MK3.1 Roadster completed 2011
    818R built with EZ36R H6 completed 2018

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  16. #10
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    Like the white I was going with either white or silver. I wanted to easily see damage or leaks and be able to touch it up. ��������
    Last edited by biknman; 01-06-2019 at 09:27 AM.
    FFR 818r 119057 Instagram biknman69
    2019 Ascent Touring, 17 Legacy DD, 96 GC coupe 22B build
    “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.”
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  17. #11
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    Has anyone put in a quick steering rack? If so what did you use?

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    Senior Member Bob_n_Cincy's Avatar
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    Quote Originally Posted by Blu View Post
    Has anyone put in a quick steering rack? If so what did you use?
    I don't remember anyone putting in a quicker steering rack. I think a couple kept the power steering. there were early discussions about a quicker rack.

    I would try a the donor rack first.
    We went with the donor rack and we're happy. This link is an early autocross video the was before we had are suspension sorted. Watch Mike's hands on the wheel.



    Here is another link with a side by comparison of Mike and Mitch side by side in the same our car. https://youtu.be/UTTFf-7O8AA
    Last edited by Bob_n_Cincy; 01-09-2019 at 10:15 PM.
    818S #22 Candy Blue Frame, Front Gas Tank, 2.5L Turbo, Rear radiator, Shortened Transmission, Wookiee Compatible, Console mounted MR2 Shifter, Custom ECU panel, AWIC soon
    My Son Michael's Turbo ICE Build X22 http://thefactoryfiveforum.com/showt...rts-818S-Build
    My Electric Supercar Build X21 (on hold until winter) http://thefactoryfiveforum.com/showt...e-Build-Thread

  19. #13
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    Last edited by biknman; 01-07-2019 at 06:49 PM.
    FFR 818r 119057 Instagram biknman69
    2019 Ascent Touring, 17 Legacy DD, 96 GC coupe 22B build
    “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.”
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  20. #14
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    I guess it comes down to personal preference, that is what is great about a building a 818.
    I am using a depowered 04 WRX rack. I can say i among a few others have a lot of track miles on my car. While building the car I thought I would want a faster rack. Now that I have driven the car a bunch for me the WRX rack works great with great feed back. It’s is personal preference.
    Last edited by Mitch Wright; 01-08-2019 at 09:14 AM.

  21. #15
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    Blu, great to have another R on the track. If you are seriously considering a halo I'd be happy to chat with you about it. I like mine a lot. I have some things I would do differently if I were doing it again. And you're welcome to come out to Oregon Raceway Park with your son and rent my STI, 818R, and the Palatov D4. That way you can really see the differences, all three cars are quite different feeling. The weather is too cold now for it though, the first track days start back up in March. You could do March but it's as likely to snow on the track as it is to be nice!
    "Good Judgement comes from Experience. Experience comes from Bad Judgement"
    Owner: Colonel Red Racing
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    818R ICSCC SPM and HPDE Rental at Oregon Raceway Park
    2005 Subaru STI Race Car ICSCC ST and SPM, NASA ST3
    Palatov DP4 - ICSCC & SCCA Sports Racer and HPDE Rental at Oregon Raceway Park

  22. #16
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    Quote Originally Posted by Sgt.Gator View Post
    Blu, great to have another R on the track. If you are seriously considering a halo I'd be happy to chat with you about it. I like mine a lot. I have some things I would do differently if I were doing it again.
    Thanks for the great rental offer I will PM you and I would like to discuss with you any halo option as we have had a lot of debate about it here. BTW, I could not be further away as I am on the East Coast, Atlantic Standard Time + 4 hours.

    Speaking of debate, I spent hours and hours yesterday (snow day) reading about Subaru dry sump or conventional, got to know a little about you reading those 22 pages lol.
    Meeting my engine builder sponsor Saturday to discuss and pick his brain about all of this as he is known for building 500+ hp motors that are reliable, granted not track raced frequently. I like Mitch running conventional wet sump, makes me want to do that, versus dry sump. Then there is the Eco boost 2.3 crate motor with harness that is tempting. As I said I did not start with a donor so my options are open, although I did buy a 6-speed for a grand as there was no reverse (usually the pin breaks) as I wanted more then 300 whp which is beyond the 5-speeds reliability.
    Reading these forums and options does make ones head spin as to the best options? Time to make progress.
    Last edited by Blu; 01-14-2019 at 04:36 PM.

  23. #17
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    Quote Originally Posted by Bob_n_Cincy View Post
    I don't remember anyone putting in a quicker steering rack. I think a couple kept the power steering. there were early discussions about a quicker rack.

    I would try a the donor rack first.
    We went with the donor rack and we're happy. This link is an early autocross video the was before we had are suspension sorted. Watch Mike's hands on the wheel.

    I know I've seen you post this somewhere before, but I never get tired of watching it!

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  25. #18
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    Halo Design

    Had a friend of mine do some Halo CAD rendering options. This is the one we liked best based on the following criteria:
    No removal of bars (easier to obtain log book as we did not modify the manufactures structure)
    Add bars only as required
    Ease of egress, also considered if the car is inverted
    Protection - even open cockpit open wheel cars are adding a halo
    Allow for 6' -6'4" driver

    The front hoop is 2" lower than the rear hoop, with the two center bars at approximate 10" apart.
    Raised center bars to allow tall drivers.

    818R-3D14.jpeg818R-3D15.jpeg818R-3D16.jpeg

  26. #19
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    Nice to have more innovation on the halo!

    You are leaving the side angle support bars in? I decided to take mine out because no matter how hard I tried there was no way I could fit thru them with a halo on top. If I'm rolled over and sitting on my top, nose down, I want to be able to crawl out either side. You must be a lot skinnier than me!

    What race organization and class are you building for?
    "Good Judgement comes from Experience. Experience comes from Bad Judgement"
    Owner: Colonel Red Racing
    eBAy Store: http://stores.ebay.com/colonelredracing
    818R ICSCC SPM and HPDE Rental at Oregon Raceway Park
    2005 Subaru STI Race Car ICSCC ST and SPM, NASA ST3
    Palatov DP4 - ICSCC & SCCA Sports Racer and HPDE Rental at Oregon Raceway Park

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