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Thread: N62 4.8L big bore throttlebody fits m62tu engine

  1. #51
    Join Date
    Jun 2008
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    Windsor ON,Canada
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    28
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    00 BMW 540i6
    Just wanted to post my experience with this mod. I sourced a used throttle body from a 550i. Also purchased a brand new pigtail for the 550i. I followed this exact wire diagram( I actually just re pinned the new 550 connector with the old m62 wires.
    Now the wires on the end of the m62 pins are smaller than the new n62 pins so after re pinning the new connector I enlarged the holes at the end with a spike tool to actually fit on the n62 throttle body.

    The throttle body(n62) bolts directly to the flange with no modification need( I have the m60 manifold)

    Now my experience driving with it(Dinan intake stock maf stock intake tube to throttle body, m60 manifold Dinan cat back Dinan stage 3 tune.) car pulls very strong(butt Dyno) but I did notice that to take full advantage of the throttle body you need to also upgrade or in large the intake tube before the throttle body the stock tube is only 78mm. I made a custom tube to fit and can definitely say(again butt dyno) it definitely helped power through out the entire rev rang especially up top. Was a great mod especially for the price in my opinion.

  2. #52
    Join Date
    Jan 2011
    Location
    Houston
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    507
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    2001 740il
    Quote Originally Posted by BavarianM50 View Post
    Just wanted to post my experience with this mod. I sourced a used throttle body from a 550i. Also purchased a brand new pigtail for the 550i. I followed this exact wire diagram( I actually just re pinned the new 550 connector with the old m62 wires.
    Now the wires on the end of the m62 pins are smaller than the new n62 pins so after re pinning the new connector I enlarged the holes at the end with a spike tool to actually fit on the n62 throttle body.

    The throttle body(n62) bolts directly to the flange with no modification need( I have the m60 manifold)

    Now my experience driving with it(Dinan intake stock maf stock intake tube to throttle body, m60 manifold Dinan cat back Dinan stage 3 tune.) car pulls very strong(butt Dyno) but I did notice that to take full advantage of the throttle body you need to also upgrade or in large the intake tube before the throttle body the stock tube is only 78mm. I made a custom tube to fit and can definitely say(again butt dyno) it definitely helped power through out the entire rev rang especially up top. Was a great mod especially for the price in my opinion.
    do you have the DUDMD tune to compensate for larger throttlebody and all that stuff he does to make the car pull through all the RPMs?

  3. #53
    Join Date
    Jun 2008
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    Windsor ON,Canada
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    00 BMW 540i6
    Quote Originally Posted by Zedbimmer View Post
    do you have the DUDMD tune to compensate for larger throttlebody and all that stuff he does to make the car pull through all the RPMs?
    No I’m running a Dinan stage 3 tune

  4. #54
    Join Date
    Nov 2016
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    Hansville, wa
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    2001 750il Chrome line
    I got a throttle body off of Ebay with the pigtail. It turned out to have different color wires. I went through TIS and figured out where each wire goes and made up a spreadsheet. I removed and replaced the TB several times trying to get it to work with no luck. I eventually ordered a new TB and after resoldering the plug for about the tenth time the car fired right up with no problems.

    I have an appointment with the dealer to install the stage 4 engine and transmission tune. I was going to go with DUDMD but because of the transmission tune I figured I would let the dealer do both. I can't wait to feel the extra power. Now I just need to get the 3.15 diff in.
    TB pinout.PNG
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

  5. #55
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    Everett, WA, USA
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    '01 740i, '93 300ZX TT
    Quote Originally Posted by acspecialists View Post
    I got a throttle body off of Ebay with the pigtail. It turned out to have different color wires..... I was going to go with DUDMD but because of the transmission tune I figured I would let the dealer do both. I can't wait to feel the extra power. Now I just need to get the 3.15 diff in.
    1. Wire colors don't matter, pin number to pin number do. I bought a pigtail that none of the colors matched up with what has been documented and mine still fired right up because I matched pin/function to corresponding ping/function.
    2. Dima does an Alpina trans tune, he doesn't have the ability to do a Dinan trans tune. For the price you pay at the dealer, I'm willing to bet you could pay for a dyno tune with Dima and gain more power in the end.

  6. #56
    Join Date
    Nov 2016
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    Hansville, wa
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    2001 750il Chrome line
    The reason I did the color chart was to make it easier to follow during the soldering process. That is to say I agree with you but just took it one step further. Dima price wise is about the same as the dealer for the same tune. I did not know that he had an tranny tune? Also not that I ever plan on selling the car Dinan is more widely known than DUDMD. It started life in 00 and I figured I would keep it that way.
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

  7. #57
    Join Date
    Nov 2016
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    Hansville, wa
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    2001 750il Chrome line
    You called it Piotrc70, even though I called in advance and made an appointment I got surprised with an additional $400 labor quote at the dealer. With both tunes that took the cost to almost $900! My DME will be on it's way to Dima today.
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

  8. #58
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    Aug 2006
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    Everett, WA, USA
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    '01 740i, '93 300ZX TT
    That's really crappy of them. Any idea on the additional labor cost? It shouldn't take them any more than an hour to flash both. Shoot, I think with flashing both AND taking a spin with Dima, I spent maybe 2 hours there? I think you'll be really pleased with getting the flash. If you're doing the Alpina trans tune, it takes a little getting used to. The trans likes to stay in the highest gear for the speed (guessing for better mileage) so if you needed to step on it say 20-30% to catch that yellow light, it may not be enough to downshift like with the factory tranny tune. Everything else from there is an upside though.

  9. #59
    Join Date
    May 2013
    Location
    Rochester, NY
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    524
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    2001 740i Sport
    Quote Originally Posted by PiotrC70 View Post
    If you're doing the Alpina trans tune, it takes a little getting used to. The trans likes to stay in the highest gear for the speed (guessing for better mileage) so if you needed to step on it say 20-30% to catch that yellow light, it may not be enough to downshift like with the factory tranny tune. Everything else from there is an upside though.
    This sounds to me like a good thing. I find the factory trans tune a little too eager to downshift at times when it's capable of doing what I wanted without a downshift. Waiting until you're a little closer to max power for the current gear / RPM before downshifting might not be quite as smooth an experience in some ways but it's possibly a little better for gas mileage and definitely gives a little more driver control over what the car is doing without having to shift manually.

  10. #60
    Join Date
    Nov 2016
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    I asked and Dima said no trans tune.
    The dealer said it would take two hours at $165 per hour. Additionally if it took more hours they would charge more. $165/hr seems a bit high to me but I guess they have to pay for the coffee and cookies in the waiting are somehow. The service writer also commented that they don't do many Dinan upgrades any more.
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

  11. #61
    Join Date
    Nov 2016
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    Hansville, wa
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    2001 750il Chrome line
    Sent my DME in on Wednesday and just got it back. Plugged it in and the car fired right up. I'm in the middle of swapping the diff to a 3.15 so I can't drive it yet.
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

  12. #62
    Join Date
    Jan 2013
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    orlando, fl
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    2001 BMW 540i 6speed
    anyone have the part number for the pig tail that goes form the n62 tb so i can wire it in to the m62 harness?
    540i 6spd DUDMD tuned-weekend brute, sounds like an M5 throaty V8 "Vtec-ish" cam noise.

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  13. #63
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    Jun 2008
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    Windsor ON,Canada
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    00 BMW 540i6
    Here is the part number for the 550i throttle body pig tail # 12 51 7 602 973. Also if you type in to eBay search “550i throttle repair” it will pull up a bunch of them

  14. #64
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    Jan 2008
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    Missouri
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    '02 540i/6
    Anyone happen to have a link to the 4" MAF?
    2002 BMW Titanium Silver 540i/6-speed Sport - ZHP Shift Knob - M5 Clutch/TTV Racing 15.6lb Flywheel - M60 Intake Manifold - N62 84mm TB - Dinan Intake Tube - 4" MAF Tube - DUDMD Tune - Magnaflow Resonator - Eibach 18mm Rear Sway Bar - Powerflex Front Sway Bar Bushings - CDV Delete - UUC SS Brake Lines - Koni Yellow Shocks/Struts - Eibach Springs - Zionsville Radiator & FDM

  15. #65
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    Quote Originally Posted by Iamthebull View Post
    Anyone happen to have a link to the 4" MAF?
    Here's a link to one I'm selling on eBay: https://www.ebay.com/itm/323822240828

    Others like it are listed there too. I'm impressed with the quality of the MAF, but I decided not to do the mod.

  16. #66
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    Quote Originally Posted by R Shaffner View Post
    Here's a link to one I'm selling on eBay: https://www.ebay.com/itm/323822240828

    Others like it are listed there too. I'm impressed with the quality of the MAF, but I decided not to do the mod.
    Looks like I found the main manufacturer of this. Thank you for your link though!
    2002 BMW Titanium Silver 540i/6-speed Sport - ZHP Shift Knob - M5 Clutch/TTV Racing 15.6lb Flywheel - M60 Intake Manifold - N62 84mm TB - Dinan Intake Tube - 4" MAF Tube - DUDMD Tune - Magnaflow Resonator - Eibach 18mm Rear Sway Bar - Powerflex Front Sway Bar Bushings - CDV Delete - UUC SS Brake Lines - Koni Yellow Shocks/Struts - Eibach Springs - Zionsville Radiator & FDM

  17. #67
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    2001 BMW 740iA M Sport

    TB

    tb

  18. #68
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    Jan 2008
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    Missouri
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    '02 540i/6
    Just ordered the throttle body for my M62tu 540i. I'm assuming this is the harness I will need? https://www.ebay.com/itm/For-BMW-E60...wAAOSwux5YSWmE
    2002 BMW Titanium Silver 540i/6-speed Sport - ZHP Shift Knob - M5 Clutch/TTV Racing 15.6lb Flywheel - M60 Intake Manifold - N62 84mm TB - Dinan Intake Tube - 4" MAF Tube - DUDMD Tune - Magnaflow Resonator - Eibach 18mm Rear Sway Bar - Powerflex Front Sway Bar Bushings - CDV Delete - UUC SS Brake Lines - Koni Yellow Shocks/Struts - Eibach Springs - Zionsville Radiator & FDM

  19. #69
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    00 BMW 540i6
    Quote Originally Posted by Iamthebull View Post
    Just ordered the throttle body for my M62tu 540i. I'm assuming this is the harness I will need? https://www.ebay.com/itm/For-BMW-E60...wAAOSwux5YSWmE
    Yup.

  20. #70
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    Quote Originally Posted by BavarianM50 View Post
    Yup.
    Thank you. Ordered. Now to order the M60 manifold.
    2002 BMW Titanium Silver 540i/6-speed Sport - ZHP Shift Knob - M5 Clutch/TTV Racing 15.6lb Flywheel - M60 Intake Manifold - N62 84mm TB - Dinan Intake Tube - 4" MAF Tube - DUDMD Tune - Magnaflow Resonator - Eibach 18mm Rear Sway Bar - Powerflex Front Sway Bar Bushings - CDV Delete - UUC SS Brake Lines - Koni Yellow Shocks/Struts - Eibach Springs - Zionsville Radiator & FDM

  21. #71
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    Anyone local to IL interested in a prefacelift intake manifold?

  22. #72
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    '03 540iA, '91 850i

    MAF to TB connection

    Quote Originally Posted by Iamthebull View Post
    Just ordered the throttle body for my M62tu 540i. I'm assuming this is the harness I will need? https://www.ebay.com/itm/For-BMW-E60...wAAOSwux5YSWmE
    I am in the process of doing this upgrade as well. I’ve already contacted DUDMD and he suggested the MK4 MAF which I got off eBay and I decided to spend the $$$ to get the big bore throttle body upgrade with wiring harness from Turner. Three questions:
    1). What is being used to connect the larger MAF to the larger TB?
    2). Does the stock harness connect to the MK4 MAF?
    3). I have a custom made flange that connects to the M60 IM. Does the inlet of the flange need to be bored out for the larger diameter TB? I understand there is a possibility of the flange breaking when trying to increase the ID.
    '91 850i 6sp CB42360
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  23. #73
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    2001 750il Chrome line
    1, I just ordered some miscellaneous hoses and adaptors until I was able to hook things up. The hard part is connecting to the TB, I ended up cutting down the original intake boot and sliding a hose over it.
    2, You install your MAF sensor in the new 4" housing.
    3, The TB should bolt right up in place of the old one. It is only a few MM larger on the inside.
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

  24. #74
    Join Date
    Oct 2012
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    San Jose, Ca
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    540i/6, 911 C4
    My m62 TB was faulty and threw codes p0221 amd p0120. I figured this was a good time to try this n62 TB upgrade.

    Purchased a used one on ebay along with the n62 connector. Cleared codes and installed the n62 TB. Now on cold starts the car idles very violently, entire car shakes for about 30 seconds. Once warmed up she drives and idles fine. That is, until the next cold start.

    Anyone have an idea what could be wrong...?

    EDIT: she runs fine now, I'm. Not entirely sure what happened I did the pedal 30 second key in reset prodedure or the Dme readapted the TB itself.

    Thanks

    Sent from my SM-N920T using Tapatalk
    Last edited by b2ke; 11-08-2019 at 12:57 PM.

  25. #75
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    2001 750il Chrome line
    You have to reset the throttle position. I think it is turn on the key wait 30sec, turn the key off, turn the key back on and start. I can't remember if a battery nap is required? You may also have to reset the adaptations with INPA. They were all learned with the old TB and maybe even a bad one. You could just wait for the car to relearn as well.
    01' 750il Chromeline
    95 M3 LS swapped
    07 M5 Manual
    06' M5, Spartan wheels and a 507hp V10
    00' 740il Dinan, CAI, Romulus exhaust, Stage 5 engine and transmission tune, 750 brakes, camber plates, strut tower brace. Sold
    00' 323i wagon for daughter
    03' 525i wagon for the wife, sold
    98' 740i for the daughter, wrecked
    92' 525i with over 200k, wrecked
    02' R1200 CLC, hit by a bus and broken in half. That one made the news!
    It's like herpes there is no cure but if treated properly you can live with it for the rest of your life

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