400 SBC Tune

[wtjoker]

Greetings! I wanted to get some ecm ninja's to take a look at the Bin I am running on my 400 SBC. Runs really good but I think there may be some room for improvement. Application: 1989 5.7 wiring harness and TBI (i know i know 454 TBI would probably work better but im not made of gold). High rise intake, full headers, A/C and 3 speed T350 Transmission. All stock sensors and O2. I am running a 27fs512 chip using a Burn2 programmer. Thanks!
11465

[wtjoker]

Any takers? I can Paypal for your time :)-

[dave w]

Can you post a TunerPro RT data log, .xdl file?

dave w

[wtjoker]

I do not have a logger setup at the moment. I plan to make my own adapter for this info. Obviously with that info would come a more precise tune, I wanted to be sure obvious parameters weren't overlooked related due to the 50 extra cubes, etc. (Heated o2 btw)

[dave w]

Yes, the tune will be more precise. See attached data log pics.

dave w

[wtjoker]

nice, I guess I need to bust out my solder gun and attempt the home made cable..I was reading where the displacement was defined in the bin but I didnt find a reference unless it is called something completely different. I was trying to get some of the obvious snafu's.

[dave w]

nice, I guess I need to bust out my solder gun and attempt the home made cable..I was reading where the displacement was defined in the bin but I didnt find a reference unless it is called something completely different. I was trying to get some of the obvious snafu's.The displacement is a calculated with the attached Base Pulse Width (BPW) spreadsheet. I tune using spreadsheets.

dave w

[wtjoker]

Awesome stuff...did you read the bin i attached, I also found a superchips that was in salvage yard 1227747 ecm that was entertaining to read, i attached it here lol btw- im almost done with this cable http://winaldl.joby.se/aldlcable.htm

[wtjoker]

Checking out your spreadsheet, it looks like I need to update this value from 135 to 156?
1 pound per hour = 0.125997881 grams per second

0.825 Cylinder Displacement
6.6 Engine Displacement in Liters
8 Number of Cylinders


156.8771504 BPW = 1461.5 x (cyl vol / inj flow rate )

7.685870741 Conversion lbs /hr to grams per second
61 Injector Flow in LBS / HR

Enter Displacement, Clinders, and Injector Flow Variables


11513

[dave w]

Checking out your spreadsheet, it looks like I need to update this value from 135 to 156? Correct.

I use the ALDL Cable from http://www.aldlcable.com/products/aldlobd1u.asp

dave w

[wtjoker]

Cool. I will run this change in and see what we do. Does the injector bias value need to be changed? it is set to .40

I have a ton of resisters, but I can't find any NPN transistors that are listed for this cable, guess ill have to go to the rat shack

[wtjoker]

ok I broke down and bought that cable lol, time is money right? Is there parameters I need to adjust or set if I go to a heated 02 sensor? I get a code 13 (after going 45+ ), but the sensor is heating up and voltage is good.Could this be due to me running lean? The one wire 02 sensor didnt do this last week. Thanks again:yikes: