Ronny

iTrader: (1)

I am asking if these changes were warrented. Changes done two years ago GM 7.4L TBI. GM 80 lbs injectors runnin 20 lbs fuel pressure. I presume changes done due to slower opening time of my injectors?

ron.bin ... EBL.bin(305 auto)

PRP prop gain duration idle 3.00 ... 5.00
" offset 14.0 ... 20.0

IAC B9in idle speed 700 ... 0

Inj correction multiplier 12.8 ... 7.02
" offset 14.4(??) 442.5 ... 396.80

PRP gain multiplier vs airflow (example 80 grams/sec) 50 .... 100

Thanks.

RBob

iTrader: (1)

With the exception of the B9In idle speed the changes are legit when larger injectors are in use.

RBob.

Rocket-Doc

iTrader: (11)

So guys you talk about changing setting for larger injectors, how do you know this has to be done and how does one figure out what to set them to?

Ronny

iTrader: (1)

TBI settings not published. TPI are published . basically a educated guestimate. My idle speed IAC only allowed to increase the idle speed. TSS set min. GM settings for 7.4L TBI may be hacked but many of us run mod 350/383

ps tko 600 going this week

Rocket-Doc

iTrader: (11)

I think I have found what I was looking for. But I should assume that this was already done in the 3001.bin file correct?

Re: 454 tbi
Quote:
Originally Posted by freaky View Post
ok setting up my tune fore the 454tbi an i want to make sure i understand this .i have #55.0 an i'm putting in 80.5 so do i minus the tables by 31.5% ? or do i just take 80.5 an subtract 55 from that leaving 25.5 .then subtract the values by 25.5 from the tables you listed ? ?
thanks ...
55 / 80.5 = 0.68, multiply the table values by .68

RBob

Rocket-Doc

iTrader: (11)

I found some original bin files on http://gearhead-efi.com/gearhead-efi/bin/

I think I'm going to get an excel chart going to see if the math all works out. The few I had already looked at like the 2025 and the 3001, had very odd numbers in the tables.