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Thread: $0d Code with turbo, boost

  1. #1
    EFI tuning addict 96lt4c4's Avatar
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    $0d Code with turbo, boost

    Been thinking about buy a cheap ebay single turbo kit to put on my old Blazer. I have looked around and cant find anyone that has done it. I thought maybe it could be doable with the MAF code. Let me know what you guys think.

    I helped a buddy of mine put a Chevy 6.5 liter diesel turbo on a 91 Ford 300 6 cylinder in an F250. We converted his truck from MAP to MAF by installing a Mustang ECM. I used Tuner Pro to tune it. Worked out really nice.

    I have had the turbo itch ever since.

    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

  2. #2
    Super Moderator dave w's Avatar
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    I kicked around the idea of using a 2 bar MAP with $OD. The downside is the Kpa resolution, 0 volts to 5 volts is less with a 2 bar MAP. The PLUS side for using a 2 Bar MAP with $OD, very affordable!

    dave w

  3. #3
    EFI tuning addict 96lt4c4's Avatar
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    Quote Originally Posted by dave w View Post
    I kicked around the idea of using a 2 bar MAP with $OD. The downside is the Kpa resolution, 0 volts to 5 volts is less with a 2 bar MAP. The PLUS side for using a 2 Bar MAP with $OD, very affordable!

    dave w
    I found this chart that shows the resolution on the 2 bar map. Looks like it reads up to almost 15 pounds of boost. I wouldn't run anymore than 10. So the resolution on the 3 bar would be even worse.

    http://www.robietherobot.com/storm/mapsensor.htm

    Man my wheels are turning....

    http://www.ebay.com/itm/GT45-10PC-TU...d84f9b&vxp=mtr

    There are guys with LS motors making good power with these cheap Ebay turbos. Most are really cranking the boost up and using them for drag racing. They seem to be holding up pretty good too. I am just looking for 8-10 pounds of boost on my 383 TBI. Mostly for some extra power while towing.

    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

  4. #4
    Super Moderator Six_Shooter's Avatar
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    I don't think anyone that suggests that the resolution "will be poor" has actually driven a vehicle with a 2 BAR MAP sensor. The stock courses that run 2 BAR MAP sensors seen to be just fine. I'm running a 3 BAR on my ca with code $59 and it has way more resolution than its really needed. Granted it does have improved tables over the stock $58, but my car drives fine,along with many other papers vehicles running 2 and 3 BAR MAP sensors.

    Do you have a 4L60E in the vehicle now? If not you could run other cod that is already set up for 2 BAR MAP sensor.
    The man who says something is impossible, is usually interrupted by the man doing it.

  5. #5
    EFI tuning addict 96lt4c4's Avatar
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    Yes its a 94 Full Size Blazer, built 4L60E. 383 TBI. 4.10 gears, Had the old truck for 15 years. it mainly sits around until I need to to pull my boat or enclosed trailer. I sprayed it with bed liner.


    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

  6. #6
    LT1 specialist steveo's Avatar
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    how much more does it cost to source a used turbo and throw the chinese one in the garbage, though? i do know of a guy that ended up with a few turbo fins wedged in his intake valves... scary stuff

  7. #7
    EFI tuning addict 96lt4c4's Avatar
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    Quote Originally Posted by steveo View Post
    how much more does it cost to source a used turbo and throw the chinese one in the garbage, though? i do know of a guy that ended up with a few turbo fins wedged in his intake valves... scary stuff
    Ouch....I figured if the turbo shit the bed, then I would just buy a new GOOD turbo. I have seen where they start getting play in the bearings.

    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

  8. #8
    Super Moderator dave w's Avatar
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    Quote Originally Posted by steveo View Post
    how much more does it cost to source a used turbo and throw the chinese one in the garbage, though? i do know of a guy that ended up with a few turbo fins wedged in his intake valves... scary stuff
    Cheap is not good ... good is not cheap The joy of a good deal diminishes, shortly after the part fails!

    Just saying

    dave w

  9. #9
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    I don't think anyone that suggests that the resolution "will be poor" has actually driven a vehicle with a 2 BAR MAP sensor.
    I'll second that. I'm using $58 with a 3 bar. The most likely practical issue is going to be with BARO updates. When the ecm does a BARO update at high throttle with boost present it will believe atmospheric pressure has exceeded 14.7 psi!

  10. #10
    Fuel Injected!
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    Speaking of these eBay turbos, has anyone seen any data on failure rates vs. the more expensive ones? Or what are the most common failures? I don't have any experience with turbos (yet), but I used to be in a helicopter maintenance unit that had a turbine engine diagnostics system and they built & rebuilt engines. I saw brand new turbine sections fail during the first run, so expensive doesn't always mean better or more reliable.
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

  11. #11
    EFI tuning addict 96lt4c4's Avatar
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    Quote Originally Posted by fastacton View Post
    Speaking of these eBay turbos, has anyone seen any data on failure rates vs. the more expensive ones? Or what are the most common failures? I don't have any experience with turbos (yet), but I used to be in a helicopter maintenance unit that had a turbine engine diagnostics system and they built & rebuilt engines. I saw brand new turbine sections fail during the first run, so expensive doesn't always mean better or more reliable.
    Just google ebay gt45 turbo ___. A lot of them going on LS based engines and making good power.

    http://ls1tech.com/forums/dynamomete...urbo-6psi.html

    In 2011 Hot Rod did a dyno test on a junk yard 5.3, using twin Ebay turbos from Cxracing. The pushed that sucker to 1200 peak hp, and it still didn't blow up.

    http://www.hotrod.com/techarticles/h...g_bang_theory/
    Last edited by 96lt4c4; 09-11-2014 at 01:07 AM.

    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

  12. #12
    Fuel Injected!
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    I'm interested in this cause I was thinking on trying the same thing on my 95 Yukon.

  13. #13
    EFI tuning addict 96lt4c4's Avatar
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    Well, looks like I might try to make this happen this winter. I bought some parts today. Decided to convert the truck over to MPFI. Get it up and running and tuned this way first. Then start looking into the turbo kit. Should be easier to hook the cold air side to a setup like this anyway. I will be using an LS1 throttle body. I have a set of LT1 injectors that I am going to try running at 60 psi fuel pressure, would make them 30 pound injectors. I ran the numbers and with boost, 400 hp at the crank, 60 psi fuel pressure, 85% duty cycle, comes out to a 30 pound injector, actually a 28. I am going to try and do this right, but cheap...LOL. If that makes sense.





    This elbow setup is pretty cool, it can be rotated 360 degrees.

    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

  14. #14
    Fuel Injected!
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    Quote Originally Posted by 96lt4c4 View Post
    Well, looks like I might try to make this happen this winter. I bought some parts today. Decided to convert the truck over to MPFI. Get it up and running and tuned this way first. Then start looking into the turbo kit. Should be easier to hook the cold air side to a setup like this anyway. I will be using an LS1 throttle body. I have a set of LT1 injectors that I am going to try running at 60 psi fuel pressure, would make them 30 pound injectors. I ran the numbers and with boost, 400 hp at the crank, 60 psi fuel pressure, 85% duty cycle, comes out to a 30 pound injector, actually a 28. I am going to try and do this right, but cheap...LOL. If that makes sense.





    This elbow setup is pretty cool, it can be rotated 360 degrees.
    Remember that the nozzle side of your injector and fuel pressure regulator are both going to see boost. You will likely need something along the lines of a Racetronix or Walbro high pressure 255 lph fuel pump to keep it fed and a very good quality fuel line and fittings. With the regulator set at 60 psi fuel pressure and 10 psi of boost reference you will be at 70 psi fuel pressure.

    Good to see you around! You ever get that TBI PCM MPFI run 305 with the edelbrock setup running right??

  15. #15
    EFI tuning addict 96lt4c4's Avatar
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    Quote Originally Posted by Fast355 View Post
    Remember that the nozzle side of your injector and fuel pressure regulator are both going to see boost. You will likely need something along the lines of a Racetronix or Walbro high pressure 255 lph fuel pump to keep it fed and a very good quality fuel line and fittings. With the regulator set at 60 psi fuel pressure and 10 psi of boost reference you will be at 70 psi fuel pressure.

    Good to see you around! You ever get that TBI PCM MPFI run 305 with the edelbrock setup running right??
    LoL...cool that you remember me. Yes I had it running good on my boat. Was hard to tune without 02 sensors though. Put the carb back on and sold the boat. Bought bigger one with a 350 and stock TBI EFI. Runs good enough as is.

    The truck already has a Walbro 255 in it and has AN lines from the fuel filter forward. The TBI has AN adapters. Should be a direct hook up to the rails. Should be a fun little project. Unless my old 383 decides it doesn't like boost.

    -1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
    -2002 Cavalier, Tuned with HP Tuners
    -1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)

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