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Thread: E36 M3 Track Car - S50 to LS1

  1. #501
    Join Date
    Oct 2007
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    sterling hts, michigan
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    02 M3
    Quote Originally Posted by doktor b View Post
    awesome.
    i've been driving my swap for 1-2 months now and every time i do, i think of your car. it's weird.
    glad you're still pushing it forward.

    how significant of temp drops did you notice with the vraptor hood vent? i did a pseudo-v-mount radiator setup and intend to vent the hood for max hot air evacuation. your vraptor vent is the best option i've seen without spending the $400 for a trackspec motorsports setup.
    Thanks man, it's been a tough winter with school but I'm really hoping to get the ball rolling again!!

    The hood vents helped a ton, I'm not sure if I posted in here or not but I believe I saw a drop in oil temp by ~20*? And coolant by 10*. I think... Also the car didn't feel lofty with the vents vs no vents.

    Quote Originally Posted by jakermac View Post
    Want a relatively inexpensive set of A6 275/35-17s? Were only used at autocross. Would probably last a little while on road race!!
    Sure! I'll shoot ya a PM.

  2. #502
    Join Date
    May 2014
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    Noblesville, IN
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    98 328i, 79 911SC
    Awesome.
    i have a lot of pressure in my bay. there's a hole in the firewall by my feet that feels like a tiny hurricane. and I know that will turn to a fire hurricane once the weather gets hot.
    hood vent will make all the difference.
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  3. #503
    Join Date
    Oct 2007
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    sterling hts, michigan
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    02 M3
    Quote Originally Posted by doktor b View Post
    Awesome.
    i have a lot of pressure in my bay. there's a hole in the firewall by my feet that feels like a tiny hurricane. and I know that will turn to a fire hurricane once the weather gets hot.
    hood vent will make all the difference.
    My apologies for the lack of detail.

    I did some tuft testing on the two side vents and those showed significant airflow.



    I have not done the same for the front vent but I'd say it's safe to assume it works equally as well. I know I did pressure testing across my hood and luckily the placement and fitment of the vent was pretty much exactly the only place it could really fit. The leading edge of the vent is ~1" behind the radiator which fills the area between the motor and radiator. I then paired all of the above with a one piece sealed duct + a 42 row oil cooler, with all of that I was able to maintain ~240* oil temps with the R comp tires. I feel I may have to do a bit more heat management with the stickier hoosiers as I'll be driving that much harder, higher % average of WOT.

  4. #504
    Join Date
    May 2014
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    98 328i, 79 911SC
    Thanks for the extra info. My oil cooler isn't as enormous as yours...but my car is more streetcar than race car.
    my radiator is ducted, shrouded, and fanned.
    my oil cooler is poorly located until I duct it and then vent the hood...then it's positioned like a boss.
    i've only seen <180° Oil temps on the dyno to this point. I can get it to 180° if I beat on it and the ambient is ~70°. But I know this cooler weather is gonna give way to heat and humidity, and I want to be ready. The oil tstat gets delivered and installed today. So that'll get me up to temp even in the cooler weather.
    thanks for all the help.
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  5. #505
    Join Date
    Oct 2007
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    sterling hts, michigan
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    Sup dudes, did some more aero testing!! Since I always felt my rear spoiler was pretty ineffective... I made it 2" bigger. I then realized that maybe it's just not getting enough air off the back window since it's fairly sloped.

    I found these vortex generators on www.airtab.com for $2.25 a piece. I bought 10, they sent 11 but I only needed 9. Due to their design, they cannot be placed close to the back window because of the radius. Anyway, here is a before and after video, I'd say it's a damn good success. Only issue now is the turbulence on the sides, not sure what to do about that. We'll see if my top speed is increased due to the decreased drag. Sure feels easier to get to 100

    Last edited by Inflame; 04-09-2017 at 10:18 AM.

  6. #506
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    Nov 2005
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    Cayman S, Golf GSW, E30
    Wow, man, that is incredible. Did/can you put the strings on the spoiler and trunk lid and see how they affect flow up to and over the spoiler?

  7. #507
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    Oct 2004
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    DeWitt, Michigan
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    '97 540i/6, '97 328i

  8. #508
    Join Date
    Oct 2007
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    Quote Originally Posted by TXBDan View Post
    Wow, man, that is incredible. Did/can you put the strings on the spoiler and trunk lid and see how they affect flow up to and over the spoiler?
    Pretty cool huh! I may do that, however there would be no before and after video. Just another reason to drive the M

  9. #509
    Join Date
    Oct 2007
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    sterling hts, michigan
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    02 M3
    Finished the master cylinder swap and made front splitter supports!

    Started off with a 19mm but that ended up being too soft of a pedal and required way too much stroke (foot would go past the accelerator). Swapped the 19mm for a 23mm and it is EXACTLY what I wanted! It feels glloorriooouuusssss!!! I almost want to brake more than accelerate!

  10. #510
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    Oct 2007
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    sterling hts, michigan
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    I'll be at GridLife this weekend!!! So if any one is going to be there, stop by!! We'll be camped near the south east side of the paddock.

  11. #511
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    Nice, i'll be waiting for the SlipAngle podcast on it. :P

  12. #512
    Join Date
    Sep 2013
    Location
    vancouver, canada
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    1971 2002
    Did you install the vortex generators 1 by 1 and do test runs?
    you had good attached flow near the C pillars but poor down the middle in first run. I'd try 3 VG in the middle and go from there. You may also want to move them forward and back to see the effects.
    would be cool to a camera mounted further behind the trunk . Would show where your wing is good at catching air and where you need to improve.

  13. #513
    Join Date
    Oct 2007
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    sterling hts, michigan
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    I put 10 across the back roof life. I could've done more testing and yielded better results, but that would've been very time consuming and I just don't get that involved with this stuff.

    However, I did pick up 3-4mph on my local tracks back straight! Not sure if that is entirely contributed to the VG's or if I'm just that much more confident with my late braking from the new brake setup.

    - - - Updated - - -

    M3 broke two more diff bolts at GridLife, a 10.9 grade I put in, in 2015 and the 8.8 that was a temporary fix. I ordered a 12.9 socket head to get my by for the rest of the year, hopefully I'll have a built diff + a bit more power to put through it by next year

  14. #514
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    Oct 2007
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    Picked up some 18x10's soon to order 295 Hoosier A7's Lap times about to drop !!!!

  15. #515
    Join Date
    May 2014
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    Noblesville, IN
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    98 328i, 79 911SC
    You sir, are out of control.

    please continue.
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  16. #516
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    Quote Originally Posted by Inflame View Post
    Picked up some 18x10's soon to order 295 Hoosier A7's Lap times about to drop !!!!
    You may want to consider BFG R1-Ss. Conventional wisdom in our TT club is that the A7s are only faster when its below 55-60F outside. And that's for our 3 lap TT format. Above 55-60F, the R1-Ss are significantly faster. Everyone from Miatas to Corvetts are on R1-Ss.

  17. #517
    Join Date
    Jun 2011
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    Vancouver, BC Ca
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    1993 325is
    Quote Originally Posted by Inflame View Post
    soon to order 295 Hoosier A7's


    When I have money to burn (again) I'll be on those or the 315s on 18x11.


    Did you buy your 18x10s already? I got a set of 18x10.5 brand new for about $600 shipped.



    https://www.carbynewheels.com/collec...ant=1815878723
    Last edited by jakermac; 06-26-2017 at 02:14 PM.

  18. #518
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    Apr 2014
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    Slidell, LA
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    I have used https://www.facebook.com/JohnBergetTire/ for A7 and R7 tire purchases. Tires are 75-80% tread for a fraction of the cost of new. I just got 8 R7s for $800 shipped to my door.


  19. #519
    Join Date
    Oct 2007
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    sterling hts, michigan
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    I bought some Apex wheels off a friend for $500, but thanks for the link, I may snag a set for shits n giggles.

    I'm not 100% sure what tires I'm going to run just yet, I may try RE71 to be class legal for GridLife and tout my fast lap times on a street tire lol.

    Stance suspension is currently getting rebuilt/revalved and I'm upping my rates to 750/900!!

  20. #520
    Join Date
    Aug 2011
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    Colorado
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    2017 Subaru BRZ
    Your build still amazes me haha! Good inspiration for mine, I am just starting to put some time back into it. Hoping to do an LS swap this off season as well.
    1994 BMW 325is - Project 325 HPDE/TT | 2013 Scion FRS - Project FRS STX | 2017 Subaru BRZ - Project BRZ STX

  21. #521
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    Oct 2007
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    sterling hts, michigan
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    Lol thanks man! I have some A6's coming in next week that I got for cheap, see how the m3 like slicks then I'll move up to a7's if I find anything and re71r for competitive stuff.

    I also realized I had my oil temp hooked up to the pre-oil cooler port lol... Switched that around, now we'll see what my oil temps are post oil cooler

  22. #522
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    Cancelled the A6's... Got some 305 Pirelli DH's coming!! If they don't fit I'll sell but if they do?!?! Dayummmm lol

  23. #523
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    Jun 2011
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    305 as in 305mm wide? It'll be a challenge to get them to fit.

    https://langmotorsport.com/2012/06/22/m3-fender-flares/

    IMG_0688 by Lang Motorsport

  24. #524
    Join Date
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    Yes sir, 305mm wide. I fear it'll be extremely tough to fit them but it's worth a shot lol

  25. #525
    Join Date
    May 2006
    Location
    Framingham, MA
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    '95 M3, '07 Z06
    Quote Originally Posted by jakermac View Post
    305 as in 305mm wide? It'll be a challenge to get them to fit.

    https://langmotorsport.com/2012/06/22/m3-fender-flares/

    IMG_0688 by Lang Motorsport
    That's my car on street tires. It was a while ago and I think those are 18x10.5 wheels with 305 tires in the rear - they fit easily. Normally the car has 18x11 wheels front and rear with 315/30/18 Hoosiers. Keep in mind that my car has a lot of fender work to make room for these.
    Last edited by hhw711; 08-08-2017 at 12:16 AM.
    Hank
    '95 M3
    Lang Motorsport

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