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Thread: Puff's "What's A Turbo?" '95 E34 Build Thread

  1. #26
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    What fuel pump should I be running for this setup? I've seen a lot of Walbro 255s being used, but is a Bosch unit going to be more reliable?

    Sent from my Nexus 6P using Tapatalk

  2. #27
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    I also picked up a 75C thermostat with a metal thermostat housing. Do I actually need this for this setup? I've read that reducing the opening point for the thermostat can make it run colder (negatively) and I'm not sure if this is relevant since I'm daily driving.

    Sent from my Nexus 6P using Tapatalk

  3. #28
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    Fun update for today: We're making progress towards removing the engine!

    I took the exhaust off today. Had to move it off the ramps/jacks so that the garage door could close, but this was after the exhaust was already off. Please enjoy a quick video of my exhaustless M50:

    https://drive.google.com/file/d/1WBo...ew?usp=sharing

    In other news, now I can check on the driveshaft components to see what I need to replace. When accelerating from neutral/clutch in, a nice metal on metal clink noise would happen. I've concluded this is likely the flex disc or universal joints.

  4. #29
    Join Date
    Aug 2009
    Location
    Charleston, SC
    Posts
    128
    My Cars
    boosted 540
    Quote Originally Posted by CallMePuff View Post
    What fuel pump should I be running for this setup? I've seen a lot of Walbro 255s being used, but is a Bosch unit going to be more reliable?

    Sent from my Nexus 6P using Tapatalk
    Not sure if you've addressed this, but if you plan to go e85, that walbro is is going to tap out pretty quick with those 60# injectors. The 450 is only a couple dollars more and worth the head room. Alternatively there are lots of other pumps. I'm running an aeromotive e85 340lph with 42# injectors on my turbo 540 and will run out of injector before i run out of pump.
    540iT...the T is for turbo

  5. #30
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    Quote Originally Posted by motorokr718 View Post
    Not sure if you've addressed this, but if you plan to go e85, that walbro is is going to tap out pretty quick with those 60# injectors. The 450 is only a couple dollars more and worth the head room. Alternatively there are lots of other pumps. I'm running an aeromotive e85 340lph with 42# injectors on my turbo 540 and will run out of injector before i run out of pump.
    My current plans only entail pump gas, so I think im good on that front. Are there any downsides to going with the higher capacity pump if I don't use the headroom?

    Sent from my Nexus 6P using Tapatalk
    Last edited by CallMePuff; 06-25-2018 at 09:18 AM.

  6. #31
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    The driveshaft is almost off, just need to bang the CV joint bolts out with a hammer. The flex disc and csb don't look terrible yet but I'll likely replace for peace of mind.

    I'm starting to worry that my CV joint is causing the clinky issues as the shaft is able to be rotated slightly while the handbrake is engaged and the car is in gear.

    Sent from my Nexus 6P using Tapatalk

  7. #32
    Join Date
    Aug 2009
    Location
    Charleston, SC
    Posts
    128
    My Cars
    boosted 540
    Quote Originally Posted by CallMePuff View Post
    My current plans only entail pump gas, so I think im good on that front. Are there any downsides to going with the higher capacity pump if I don't use the headroom?

    Sent from my Nexus 6P using Tapatalk
    Fair enough. Not really, maybe slightly higher electrical load? They only other thing I can think of would be your fuel pressure regulator might not be able to keep up at low loads. Not sure what the stock 525 regulator is rated for. My stock fpr on the m60 is keeping up with that aeromotive pump though.
    540iT...the T is for turbo

  8. #33
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    Should I be replacing the motor mounts with something aftermarket to stiffen it? Keep in mind this is a daily driver.

  9. #34
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    Hey all!

    Good updates for today.

    The MS3 Pro is functioning, although I only started the car with it for about 3 seconds since I hadn't realized I'd flooded it and was too preoccupied to try it again.

    The drive shaft was pulled and upon inspection looks like I'll need a giubo and csb.

    The tranny and motor were pulled just in time for Independence Day! The motor went off to my local BMW guy today who will be swapping components over to an M52 block with a rebuilt head.

    In the meantime, I went ahead and started cleaning the tranny and engine bay. There's some before/after pictures below, but it's not exactly clean-clean yet.

    Additionally, I ordered a giubo, csb, dust covers, engine mounts, a Stewart high-flow water pump, new idler pulleys, and a coolant reservoir drain plug because mine was leaking.

    Where are you guys ordering your hoses and fittings for oil, vacuum, and charge piping from?

    Snapchat-1687502890.jpgSnapchat-1145177694.jpg00002IMG_00002_BURST20180705172900_COVER.jpg00002IMG_00002_BURST20180705170310.jpgIMG_20180705_201357.jpg
    Last edited by CallMePuff; 07-05-2018 at 11:32 PM.

  10. #35
    Join Date
    Jan 2017
    Location
    RI
    Posts
    107
    My Cars
    1994 325is
    I have been using apt turbo for most hoses and fittings. They have most of what you could need.

    Sent from my SM-G930V using Tapatalk

  11. #36
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    Quote Originally Posted by drstuess View Post
    I have been using apt turbo for most hoses and fittings. They have most of what you could need.

    Sent from my SM-G930V using Tapatalk
    I'll check them out, thank you!

    Sent from my Nexus 6P using Tapatalk

  12. #37
    Join Date
    Jan 2017
    Location
    RI
    Posts
    107
    My Cars
    1994 325is
    Quote Originally Posted by CallMePuff View Post
    I'll check them out, thank you!

    Sent from my Nexus 6P using Tapatalk
    My autocorrect messed it up, it's ATP Turbo. For intercooler piping I used generic 2.5 and 3 inch Intercooler kits on Amazon. Couplers aren't great, but should be serviceable.

    Sent from my SM-G930V using Tapatalk

  13. #38
    Join Date
    Aug 2009
    Location
    Charleston, SC
    Posts
    128
    My Cars
    boosted 540
    If you have any boat shops near you, you can use marine exhaust tubing in place of silicone couplers. More heat resistant and it's less pliable, so not prone to blow outs like most couplers.
    540iT...the T is for turbo

  14. #39
    Join Date
    Feb 2017
    Location
    Minneapolis, Minnesota
    Posts
    97
    My Cars
    1995 BMW 525i/5
    For charge piping, my turbo outlet is 2.5" and both my intercooler flanges are 2.5". I've heard of 2.5" on the hot-side and 3" on the cold. Why is this and is it necessary for my application?

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