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Thread: E30 M62 Turbo

  1. #76
    Join Date
    Apr 2006
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    Kirkland,Wa
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    E36 M3, 996 ,16 4runner
    Did you solve your boost breakup issue?

  2. #77
    Join Date
    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    Im not sure. I went over the car checking connections and all but i have not taken it out since that video was shot.

  3. #78
    Join Date
    Aug 2009
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    Chicago, IL
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    2000 BMW 540i 6 Speed
    Bump

    Hows the car holding up so far?

  4. #79
    Join Date
    Dec 2006
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    Marin,Ca.
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    Bavarian Muscle Car
    Quote Originally Posted by filon102 View Post
    Bump

    Hows the car holding up so far?
    +1. Inquiring minds want to know.

  5. #80
    Join Date
    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    Quote Originally Posted by filon102 View Post
    Bump

    Hows the car holding up so far?
    Car is running real strong. No oil or water leaks! No compression issues. I went through the entire harness and cleaned up all of the ground contacts, then increased the timing and fueling so the car is dumping alot of fuel. But the breakup issue is gone. Once i retune, I will be able to narrow that down to know if it is a fueling issue or not. The car is running real strong tho.

  6. #81
    Join Date
    Dec 2006
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    Marin,Ca.
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    Bavarian Muscle Car
    How much boost are you running? Stock internals (I forgot)?

  7. #82
    Join Date
    Aug 2013
    Location
    Oshawa, Ontario, Canada
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    218
    My Cars
    1998 740i
    Quote Originally Posted by BigM62 View Post
    How much boost are you running? Stock internals (I forgot)?
    still 7.5 on stock internals?
    also did you end up putting it on the dyno to get some numbers?
    great build man, I'm starting my r&d for my project....turbo e38 stance sled lol same engine that you used.
    glad to see it makes good power with a stock motor.
    instagram: @artur_bastos
    My E38 Build



  8. #83
    Join Date
    Oct 2004
    Location
    DeWitt, Michigan
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    5,512
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    '97 540i/6, '97 328i
    lughed, did you make your exhaust manifold head flanges, cut them off of some stock manis, or did you find a place to buy them/have them made?

    How's everything going? Good I hope!

  9. #84
    Join Date
    Oct 2007
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    ny, ny
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    751
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    e28 m5 e30 4.4T e36 325
    I cut off the stock flanges then cut out what was left of the inner core

  10. #85
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    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    Quote Originally Posted by arturb View Post
    still 7.5 on stock internals?
    also did you end up putting it on the dyno to get some numbers?
    great build man, I'm starting my r&d for my project....turbo e38 stance sled lol same engine that you used.
    glad to see it makes good power with a stock motor.
    Nah I never dyno'd it and its still at 7.5. I'm about to go out now
    and look into this issue im having with a super rich o2 reading on throttle application

  11. #86
    Join Date
    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    Geeez, I didnt realize I havent updated this in two years. Anyway, the car is still dishing out that punishment. For those that inquired, the issue I had, had been resolved since my last post in this thread. It turned out to be a few bumb coils in the set that I bought when the car was first built. I ended up buying a new set rather than filter out the bad ones.
    I have been driving the car alot, almost every weekend. I noticed my chassy has flexed out of shape and it left about a quarter inch gap in my door despite having a roll bar. So the latest upgrade being done to the car is an under carriage cradle being built to be light weight and eliminate flex while keeping a low center of gravity.
    I came across some old vids I have. Here is a light 4-6 gear pull I did last summer. Yes the car is still alive and kicking.
    https://youtu.be/ptSpC4MvE1Q

  12. #87
    Join Date
    Apr 2006
    Location
    Minnesota eh?
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    5,166
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    86 325es
    Sounds awesome
    86 325es, 2.8L NV m50, S366, Megasquirt 2, e85, solid rear axle, 4 link, spool, T56 Magnum trans, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  13. #88
    Join Date
    Dec 2006
    Location
    Los Angeles, CA
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    4,129
    My Cars
    #Project333Ti & Z3 Coupe
    Have loved this project since I followed the thread years back. My only qualm with this is the 3.73 gears, those are really short for a 6 speed. This car would be so much more fun with a 3.25 or a 2.93!

  14. #89
    Join Date
    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    I love the 3.73. At 65 mph it cruise at 2750 ish which is actually better than my stock ti which would be at 3000 rpm. The problem is it a larger engine and a small fuel tank. I have a 3.25 at home and contemplated putting it in but ill save it as a backup. I do believe the 3.25 would be a better comprise between economy and performance. The 3.73 is raw performance with just enough economy to live with being I rarely drove the car. The small fuel tank has me filling up alot but I never calculated how long I can go on a tank in one drive. Imo, the 3.73 is definately the funner gear ratio.

  15. #90
    Join Date
    Dec 2006
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    #Project333Ti & Z3 Coupe
    Quote Originally Posted by lughed View Post
    I love the 3.73. At 65 mph it cruise at 2750 ish which is actually better than my stock ti which would be at 3000 rpm. The problem is it a larger engine and a small fuel tank. I have a 3.25 at home and contemplated putting it in but ill save it as a backup. I do believe the 3.25 would be a better comprise between economy and performance. The 3.73 is raw performance with just enough economy to live with being I rarely drove the car. The small fuel tank has me filling up alot but I never calculated how long I can go on a tank in one drive. Imo, the 3.73 is definately the funner gear ratio.
    I personally don't agree with there being a compromise. You have a light car, with a much bigger motor, making plenty of torque NA and a turbo. In all my swap cars, including a 500whp s50 swapped e30, I preferred long gears that make use of the powerband and also help with traction. Longer gears on a turbo car will load the turbo and get it to spool a little earlier. Also turbo cars run through the gear quicker when in boost.

    Roughly your current gearing top speed in each gear should be as follows with a 225/45/17 tire:

    1st: 33
    2nd: 55
    3rd: 83
    4th: 113
    5th: 139
    6th: 168

    With a 3.25 you would get this:

    1st: 38
    2nd: 64
    3rd: 96
    4th: 130
    5th: 160
    6th: 193

    You would have a much more usable 1st-4th gear, with less traction issues and much less shifting. A long 2nd and 3rd are always great in street cars with wide powerbands. Just my 2 cents.
    Last edited by e30polak; 06-16-2017 at 04:43 PM.

  16. #91
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    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    Helping with traction and loading the turbo I absolutely agree with but any gearing that goes above ~160 is useless to me. I would only go with lower gearing for the cruising rpm

    - - - Updated - - -

    And as a note I have 285/30/19

  17. #92
    Join Date
    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    M62 turbo E30 is still ticking. I worked over the winter to recover what seemed like some lost power from really safe tuning. I didnt touch the timing but i eventually did raise the spark dwell back up after being afraid of this from the bad coil mishap that i had.
    I dialed in the accel enrichment and raised my rev limit up to 6800 after going down to 6500 from 7200. Only running 7.5 lbs i leaned out my peak boost afr from 11.6 to 12.1 ish.
    I havent run the car since the weather broke but here is a run with a straight piped Lamb. Lp560. late last summer before the tuning changes were made. I spun 3rd, part throttle in 4th and and most of 5th and i banged off the limit on my slow shifts forgeting i had it down to 6500 rpm. Thought i would post a m62 turbo that wasnt drifting or doing burnouts..... Enjoy!

    - - - Updated - - -

    https://youtu.be/qdNn2cXfNcY

  18. #93
    Join Date
    Oct 2004
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    DeWitt, Michigan
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    '97 540i/6, '97 328i
    Quote Originally Posted by lughed View Post
    Thought i would post a m62 turbo that wasnt drifting or doing burnouts.....
    Ummmm, but why would you want to do that? Lol

    Anyway, what are you liking for dwell? I have mine down to 2.0 nominal, and it seems fine, but it seemed fine set higher too.

  19. #94
    Join Date
    Oct 2007
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    ny, ny
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    e28 m5 e30 4.4T e36 325
    It just seems to be one of the BMW combos that is never seen in a straight line.
    Its at 3.2 now and pulling off from a dead cold start at below 30 is not longer a problem. I would have had to let the car warm up for awhile before i could drive off without heavy stumbling. This is without an iac and 42 lb injectors. It took me awhile to turn the dwell back up even though this stumbling was not a problem in the early tuning stages when my dwell was 3.5.

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