Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Page 1 of 3 123 LastLast
Results 1 to 15 of 34

Thread: Cadillac 500 to TBI

  1. #1
    Carb and Points!
    Join Date
    Feb 2012
    Location
    Northern Wi.
    Posts
    9

    Cadillac 500 to TBI

    I'm new to EFI conversions and I have a big project with hopes of finding help here. I have a 1986 Chevy4x4 that I'm swapping in a cadillac 500 motor and a 4L80E transmission. I am converting the 500 to TBI froma chevy 454. I have the throttle body and adapter. A brand new engine wiring harness for a 1992-1995chevy truck. Some of the sensors. A cadillac engine to chevy transmission adapter. The PCM I think I need is the 16197427 to control the tbi and transmission. I know there's more parts I need but it's a start.
    Hope this site can help me with what to do and what I need. Thanks

  2. #2
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    The 16197427 PCM is great and has lot's of support and all files needed for TunerPro and so many hacs for running TBI, MPFI and even MAF. It usually runs mask ID $OD for 4L60E which I think can be changed to 4L80E. But you can just start with a $OE mask bin/chip that was designed for the 4l80E in the same PCM.

    1986 Chevy truck was carb but should have a VSS already in behind the speedo so that's a good start to. There's lots of guys here that can help out details of VSS changes needed when you get to the chip burning stage.

    Post some pictures of your buildup as you go, we like to see projects come together!

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

  3. #3
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    44
    Posts
    364
    Mark is correct , there should already be a provision for a speed sensor behind the cluster .

    The '7427 is by far the one to choose for this type of conversion , as Mark said , switch to $OE and start with a 454/4L80E bin , should put you pretty darned close .

    You will need to address the distributor , I used a early CC distributor when I did the 403 in my Olds and modded the wiring to suit , I believe they are out there for the Cadilliac also .

    Good luck with your swap

    TOM

  4. #4
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Distributor! Good point! If you can get a large cap HEI for that engine it can be converted to EFI spark timing control fairly easily... if not there are other ways.

    One other thing to think of is fuel. 500 cubic inches can use a lot and a TBI fuel pump may not be enough. You can use an inline TPI fuel pump which is widely used with big inch or big HP engines. Need 3/8th line to feed and 3/8 or 5/16th return.

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

  5. #5
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    44
    Posts
    364
    I used the 7 pin (I think) CC distributor on my 403 conversion , wired the 4 pins into the control side of the module and retained the coil in cap . At least that is how I think i did it , it has been quite some time ago....

    1986 should still be carbed , but he could replace the tank and sender with a later ('87-up) injected tank and I would install an intank TPI pump , no more $ than the TBI pump and it'll give you all the fuel you will need .

    TOM

  6. #6
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Here's a thread with that HEI conversion info...

    http://www.gearhead-efi.com/Fuel-Inj...BI-on-inline-6

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

  7. #7
    Carb and Points!
    Join Date
    Feb 2012
    Location
    Northern Wi.
    Posts
    9
    I forgot to metion that I also have a distributor out of a 1980 cadillac eldorado with a fuel injected 368 motor. I read
    that it should work with some modifications.

  8. #8
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Sweet! That should be the large cap HEI with 7 pin module? Like one pictured in other thread? I'm not familiar with what came on them but that is the type of that era...

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

  9. #9
    Fuel Injected! gregs78cam's Avatar
    Join Date
    May 2011
    Location
    N. Idaho
    Posts
    762
    If it is going into a non-EFI tank, I would suggest the newer style fuel pump module. Like here:
    http://www.gearhead-efi.com/Fuel-Inj...l-Pump-Upgrade

    Pretty easy, cheap, and will support lots of power.
    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

  10. #10
    Carb and Points!
    Join Date
    Feb 2012
    Location
    Northern Wi.
    Posts
    9
    Thanks, I'll look into it.

  11. #11
    Fuel Injected! JeepsAndGuns's Avatar
    Join Date
    Sep 2011
    Location
    alabama
    Age
    35
    Posts
    1,668
    Haha, the caddy 500. I have one of those in the storage shed, disassembled, in need of a rebuild. I have plans to one day build it and swap it into my cherokee, but money has kept me from doing that. Plus my current 401 is only a few years old on a full rebuild, so I will probably wait untill I wear it out. So I may be 50 by the time I swap it in (I'm 29 right now)...lol

    I remember a build on one of those several years ago in a hot rod mag, they built it and it had more HP, an just as much torque as the customers duramax diesel. I think I still have that issue somewhere....
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  12. #12
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Those big caddy motors have always been huge tourque monsters! Pushing a 6000 brick down the highway at 70 MPH effortlsly, just touch the gas and 100 MPH comes around. Of course gas was a lot cheaper then, but that was not even a point to a Caddy owner!

    I hope we still have gas by the time your 50! But there's enough scrap metal there to build a new car...

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

  13. #13
    Fuel Injected! gregs78cam's Avatar
    Join Date
    May 2011
    Location
    N. Idaho
    Posts
    762
    Today while at Pull&Save, we found a '74 Eldorado, with a 500 and FWD TH425. My dad and I want to take the front half of the frame from one and graft it the back of the front half of a Datsun pickup. So we would have a rear engine pickup. And of course EFI it.
    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

  14. #14
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Quote Originally Posted by gregs78cam View Post
    Today while at Pull&Save, we found a '74 Eldorado, with a 500 and FWD TH425. My dad and I want to take the front half of the frame from one and graft it the back of the front half of a Datsun pickup. So we would have a rear engine pickup. And of course EFI it.
    Now that would be cool!

    Next time you go to pull and save let me know if you have room for one more, if not my wagon will seat 6 and still carry all the parts back!

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

  15. #15
    Fuel Injected! gregs78cam's Avatar
    Join Date
    May 2011
    Location
    N. Idaho
    Posts
    762
    Quote Originally Posted by EagleMark View Post
    Now that would be cool!

    Next time you go to pull and save let me know if you have room for one more, if not my wagon will seat 6 and still carry all the parts back!
    OK!
    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

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •