Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Page 5 of 5 FirstFirst 12345
Results 61 to 63 of 63

Thread: Starting to Learn on 95 G30 5.7 for Towing

  1. #61
    Fuel Injected!
    Join Date
    Apr 2017
    Location
    Oregon
    Posts
    54
    Quote Originally Posted by Fast355 View Post
    This is the timing map I had in my 7730 TPI ECM that was running a stock TPI intake on a 1-ton 8.8:1 350 TBI engine with a LT1 F-car cam in my 1983 G20 van. PE spark is high at the top rpm because the TPI runners and swirl port heads are choking off the airflow by that RPM. More timing kept the power from falling off quite as noticeably. It had good power to ~5,200 rpm.
    Thanks for the ignition map! That is helpful. I will mess around this summer, but I am not going to do the cam swap, bowl blend until late September. I keep having to tow the dyno places when the weather is good. I did look at the dyno runs on the van and there were some leaner areas at low rpm with the stock fuel map, not crazy though, if anything its too rich in the higher rpm ranges but I only run it to 4000.

  2. #62
    Fuel Injected!
    Join Date
    Apr 2017
    Location
    Oregon
    Posts
    54
    A picture I took yesterday. The van has been towing fine all summer. One thing I never thought about when I rebuilt the 4l60e is the 3rd to 2nd gear spacing. Its not that great for towing. If I had to do it over agian I would have found a core 95 4l80e to make 2nd a little more usable. The 4l60e trans durability wise is fine so far.

    [/url]

  3. #63
    Fuel Injected!
    Join Date
    Apr 2017
    Location
    Oregon
    Posts
    54
    I have some questions about the program that some say they use to generate shift points, Blue Cat trans table generator. The information it exports seems to be made for another tuning program (HP Tuners) leaving a lot of tables to the imagination. The lockup tables seem abbreviated, it generates something called shift slope, and the Vss ratio is in a very different format than TunerPro $0D. I ended up not using it at all but I am still curious just to learn what all the fuss was about when using it for TunerPro.

Similar Threads

  1. Towing with T56
    By CDeeZ in forum Gear Heads
    Replies: 73
    Last Post: 05-13-2018, 04:43 PM
  2. Starting over
    By old truck guy in forum GM EFI Systems
    Replies: 1
    Last Post: 03-12-2016, 01:27 PM
  3. Suggestions for a starting bin
    By 88tpix2 in forum GM EFI Systems
    Replies: 1
    Last Post: 04-16-2014, 03:11 PM
  4. Tuning for towing?
    By dyeager535 in forum GM EFI Systems
    Replies: 13
    Last Post: 04-10-2012, 11:18 AM
  5. Starting Fresh
    By Six_Shooter in forum Gear Heads
    Replies: 2
    Last Post: 03-03-2011, 04:19 PM

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
  •