Non Wastegated BW instead of wastegated stock turbo

Discussion in 'Freightliner Forum' started by bizzzzzz1, Jan 1, 2013.

  1. carrkool

    carrkool Heavy Load Member

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    the gateless turbo will be better...also since putting it on turn up your fuel some...standard 12.7 60 ser ecm is set to 14-17 percent injector setting we turn them up to 70-75 percent. gets rid of that starting lag. as for the pyro install...look at the elbow pipe that installs on the exhaust side of the turbo. some will have it some wont. what you are looking for is a small thread hole if your truck does not have a pyro needle on it it will have a plug in it... if your pipe does not have the thread hole. you can either buy one with it. or when you get the needle and gauge find a nut that fits it and drill a whole and weld the nut on. than screw in the pyro needle run the 2 wires into the truck in the dash ...drill a hole for the gauge mount gauge and hook up the 2 wires...its a real easy install
     
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  3. Cowpie1

    Cowpie1 Road Train Member

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    Well, I have been pretty satisfied with the BW 171702 non gate turbo on my 12.7 Detroit. Put it on along with port/coated exhaust manifold when we installed the engine. I even put a turbo blanket on the turbo. Walker megaflows on the stacks. Typical day, egt's in the 600-700 range. 800F on a hard pull. Never above 900F even when I lugged it down a little. And the BW turbo is a lot cheaper to buy and available just about everywhere. Got mine from a dealer on Ebay, $689 full cost delivered to the front door.
     
  4. carrkool

    carrkool Heavy Load Member

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    thats what i keep telling everyone....gateless turbo with port and polished manifold will make a world of diffenece alone. best bang for you buck. add a ecm tune and injectors and danm
     
  5. Flightline

    Flightline Road Train Member

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    What does the turbo blanket do?
     
  6. Cowpie1

    Cowpie1 Road Train Member

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    The turbo has a parasitic effect on exhaust flow due to the fact that substantial heat in the exhaust is lost thru the turbo. As exhaust cools, it slows down, creating a restriction on the exhaust leaving the engine. To avoid that, a blanket is placed around the turbo to retain the exhaust heat and keep it flowing well. This is nothing new. It has been done for many, many years on racing applications. Now, some would think, "I don't want to cook my turbo and blow it!" That is not going to happen. The turbo cools down just fine after a pull and when shutting down. Since the hot exhaust is flowing more freely, the turbo doesn't experience "heat soaking" and doesn't retain all that exhaust heat. I have used turbo blankets on my last two trucks and other applications. I have never lost a turbo because of it.

    Another benefit is all that heat that would normally be lost thru the turbo is not heating up everything else near it. The blanket is even just warm to the hand if you put your hand on it after running the engine all day. For those with under hood air filters, this also helps keep the intake air flowing thru there cooler since it is not being heated by the nearby turbo. And cooler air is more efficient. So you actually can have a double benefit by using a turbo blanket.

    Between the port/coated exhaust manifold, the larger non gate turbo with a blanket, and high flow muffler(s), it is not unrealistic to see over 200F cooler EGT's. Pulling today on I-80 with a pretty stout head/cross wind, and loaded up with 42K in the box, running 65-70 mph, my EGT's never got above 700F on the hills. Turbo cooled down to below 300F within 1 minute of stopping.
     
    Last edited: Jan 5, 2013
    Flightline Thanks this.
  7. carrkool

    carrkool Heavy Load Member

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    yea a blanket is just like wraps for exhaust headers on high preformace motors. i figure that is something more people can relate to.
     
    Cowpie1 Thanks this.
  8. bizzzzzz1

    bizzzzzz1 Light Load Member

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    Hello guys, i'm back. Installed it, drove about 1500 miles, had oil leaking (it scared the crap from me), did 2000 miles and nothing, now everything is clean, no oil or anything else, and good power. Now a question, when installing the turbo, was i supposed to retorque the nut from the center axle, which is on the compressor wheel side? I red somewhere it must be done but mechanics i talked to said don't touch it. By the way which is the normal range of the freeplay of the turbo center axle when moving up and down? Thank you.
     
    Last edited: Jan 7, 2013
  9. king Q

    king Q Road Train Member

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    Johannesburg sa
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    Never heard of a retorque on the impeller axis nut.
    Never had one come loose.
    There are no substantially compressible or stretchable materials so just leave it IMO.

    As for the movement up and down Im not sure of the exact measurement and what is normal defiantly differs between different makes and models.
    What I can say is that on some it is quite a bit more then I expected.
    The bearings are olive shaped so it is not play but float you are often feeling when you move the shaft by hand.
    When play is to much the seals will leak oil.

    I am no expert so just take what I say with a pinch of salt but is is what I have experienced.
     
  10. rebel127

    rebel127 Light Load Member

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    Your rite on all accounts. Never touch the nut on the turbine shaft !!!!!!!! And the best way to check for bearing play is to remove the turbo drain line and there is a tool with a dial indicator that you install in the hole and check motion of the shaft up and down. Because most of us just reach in there and check for play if you grab the nut and pick up on it and spin, as long as the blades do not hit the housing your fine. Use only the tips of your fingers the bearings are twin hydrodynamic journal bearings so the ride on oil that is not present when the engine is not running. the shaft when new has more play in today's turbos then some of the past but they are a much better design.[h=1][/h]
     
  11. bizzzzzz1

    bizzzzzz1 Light Load Member

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    The blades do not touch the housing. What else might be the cause of the oil leak? any ideas? had again some
     
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