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Thread: My Dual TBI Camaro Project

  1. #31
    EFI GearHead ! EagleMark's Avatar
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    Re: My project

    Mr Injector is in Dalton on Govement way.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  2. #32
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    Thanks, I found your post over on FSC and got them done this week, picked em up Friday. Only thing I don't quite understand was the flow number he has listed on the sheet 105cc/min???? He showed me the handwritten slip that had 800 or 804cc/min. I was expecting some concrete accurate numbers. I will call him Monday and talk to him again.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  3. #33
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    I am going to try running this thing in $0D instead of $0E. oldred95 over on FSC says he has done it, so I will give it try. $0D just has so many more trans tables defined, more .bins available and is used much more, hopefully can get it sorted out this week. I got my air cleaner baseplate modified, I'll get that mounted tomorrow.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  4. #34
    EFI GearHead ! EagleMark's Avatar
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    Re: My project

    Quote Originally Posted by gregs78cam
    Thanks, I found your post over on FSC and got them done this week, picked em up Friday. Only thing I don't quite understand was the flow number he has listed on the sheet 105cc/min???? He showed me the handwritten slip that had 800 or 804cc/min. I was expecting some concrete accurate numbers. I will call him Monday and talk to him again.
    My recipts always come with before and after numbers. Unless he was just cleaning and forgot to right them down. He also called tech support last time I was there and they showed him the cc flow rate to PPH conversion that GM uses. Now he can use his machines cc flow rate and pressure and come out with what is expected from a GM injecotr. So far since this has happened I have only had one set done and they were very close to what GM said they would be. But you have to take into account gausges could be a little differant. His cleaning fluid could be differant than gasoline etc...

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  5. #35
    Super Moderator dave w's Avatar
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    Re: My project

    Quote Originally Posted by gregs78cam
    Thanks, I found your post over on FSC and got them done this week, picked em up Friday. Only thing I don't quite understand was the flow number he has listed on the sheet 105cc/min???? He showed me the handwritten slip that had 800 or 804cc/min. I was expecting some concrete accurate numbers. I will call him Monday and talk to him again.
    I use the measured flow only as a best guess what to program the PROM with. What the PCM "thinks" is the injector flow is, and what the measured injectors flow is are apples and oranges!

    dave w

  6. #36
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    Ok, I got everything back together, It is running $0D with the 4L80E, but I still need to change one or more of the shift solenoid state entries because the manually selected gear doesn't match what is shown in the bitmasks. It is drivable though. And the radiator fan is fully controlled by the PCM also. My timing seems a little off though. It shows about 5 degrees more than what is in the timing map. I'll upload my last datalog if anyone is interested. I ordered the hood scoop this morning, I'm putting a '67 427 Corvette scoop on it.
    Attached Files Attached Files
    • File Type: xdl 3.xdl (355.5 KB, 1 views)
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  7. #37
    EFI GearHead ! EagleMark's Avatar
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    Re: My project

    Could the timing be where you have it set?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  8. #38
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    Distributor and Initial advance should both be set at 0, but I can double check. What I meant was the timing on my .ads dash shows about 5 more than the SA table has @ idle. The only spark bias I don't have zeroed out is Main spark bias which is 9.8, so I don't know where the 5* difference would come from.

    I think I have the trans shift solenoid states figured out, but I still have no manual 1st gear. I think it may be in one of the tables - Manual upshift/downshift MPH vs. TPS were all zeros.

    Anywho I've got more stuff to try tomorrow.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  9. #39
    EFI GearHead ! EagleMark's Avatar
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    Re: My project

    Sounds like you zerod everything? I usually start with a stock chip and just adjust. There's tons of things you can mess up!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  10. #40
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    Quote Originally Posted by EagleMark
    Sounds like you zerod everything? I usually start with a stock chip and just adjust. There's tons of things you can mess up!
    Well I started with what I thought would be a stock .bin off Moates site, but it had a lot of stuff zeroed. It seems every .bin I download has some stuff wrong in it. I only zeroed PE spark, and EGR stuff. I just use compare to get them right. I just looked at BJYL, BJLH, BJYL, BDWL, BJYB, and they all have all zeroes up to 93 & 100 kpa where they have between 27 and 35. BJDR has mostly zeroes but it has 127.5 from 37.5%TPS and up in the 2->1 downshift column.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  11. #41
    EFI GearHead ! EagleMark's Avatar
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    Re: My project

    Take a look here as I know most of the bins are stock and I have the gallerey set that people can download them and even upload them with a differant name and changes but origanals are protected. Most were donated by Robert!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  12. #42
    EFI GearHead ! EagleMark's Avatar
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    Re: My project

    How did you go about wiring for the VSS with this 427 ECM? Did you use the VSSB/DRAC ? I am finishing up a harness for a 427 ECM for my kids 345 IH engine. I don't need any tranny controls as it's a manual.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  13. #43
    Super Moderator Six_Shooter's Avatar
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    Re: My project

    You should be able to use a 2000 PPM VSS connected to F12 and "VSS not from DRAC" set.

    The Painless VSS should work for that.
    The man who says something is impossible, is usually interrupted by the man doing it.

  14. #44
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    EagleMark, yes I used the DRAC/VSSB for the signals to the PCM and AutoMeter Speedometer.

    Well after playing with $0D for a day, I am going to back to $0E. I just have had no luck getting the shift solenoids right. While re-doing a new .bin for $0E, I found the error in the cooling fan code. I put a $90 in a spot that should have been $96. That should fix it. Now I will have to figure out how to get the 1>2 shift tightened up. That was the reason I wanted to try $0D, it actually has a .xdf parameter "desired shift time vs. shift" that is not in $0E, along with quite a few others. That's about where I'm at.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  15. #45
    Fuel Injected! gregs78cam's Avatar
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    Re: My project

    Update: After setting up a new .bin based on a stock BJDR.bin with cooling fan code, flags set for wideband input, desired AFR, and all the other cr@p that needed turned off or on, It runs pretty well. Shifts into all gears, even TCC works. The actual fan on and off temps don't exactly correlate to the .bin values, so that is one issue to sort out. I also changed a couple trans line pressure variables, I will try those out next week. I think I am going to get the Camaro registered and insured before I go into work tomorrow.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

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