Steady speeds don't have any knock counts. It' the long hard pulls up a hill in the 60-80 Kpa range that generates the knock counts. I'm trying to tune the truck for pulling trailers with 4 tons of...
Type: Posts; User: majacoby
Steady speeds don't have any knock counts. It' the long hard pulls up a hill in the 60-80 Kpa range that generates the knock counts. I'm trying to tune the truck for pulling trailers with 4 tons of...
As far as tuning spark advance, in a 28 minute run with a good 4000+ rpm sprint, is a knock counter going to 255 twice a bad thing?
I know less is better. The distributor is set for 0 with jump...
I'm done with VE tuning.
What values should I put back in now that said "Off for BLM"?
I was using $42-1227747-V5.1.xdf when I did the VE. I have since moved to $42-1227747-V5.9.3.xdf
Does the...
Excellent! I work with excel a lot. I should have looked at the cells. That was a DUH monument!
Thanks, MarkJ
Dave,
I like your spreadsheet. Where did you get R-Map ( R-Kpa)and R-tach?(R-RPM) I don't have them as an export item.
What I did do, is use your other spreadsheet that I used to make adjustments...
I have ran they VE spreadsheet at least 10 times. I gather data to and from work and then work the tables. every time the history looks like this:
RPM/MAP
20
30
40
50
60
Dave,
With a data log like this (below) would you drop the BPW to 138?
RPM/MAP
20
30
40
50
60
I have been tuning as before. Almost everything seems to be on the low side after making the spreadsheet adjustments. I did notice that my BPW is still set @ 140. From what I have been reading and...
No Problem.
You all share so much with the rest of us on this site!
I finally got around making the adjustable TBI pressure regulator. The original regulator was just over 9 PSI. The adjustable is now set at 11 PSI fuel pressure.
I also checked for updates on...
I finally compared the air setting to the real fuel. They were close but the pressure was about 3/4 of a pound off.
I showed a little over 10 PSI on air with incoming air set at 24 psi. When I put...
Will do! After I get my replacement fuel lines..
Thanks Dave and Mark.
OK guys, I finally got time to adjust my fuel pressure. I modified the regulator and rebuilt the TBI.
If the stock one was running at 12 psi and I raise the adjustable to 14 psi, do I need to change...
I did a little digging around. A friend of mine that works on stock repairs said that one time he had a gauge on a TBI and pinched off the return line an saw the pressure go up to 30 PSI. So I tried...
I saw that someone did a pre-setting of an adjustable fuel pressure regulator using an air compressor. The thread was called "Vacuum Adjustable TBI Fuel Pressure Regulator" that had a statement in...
35763577
Here is what I got after going back to a smooth VE graph and setting Base Pulse Width to 140 and then making 2 runs and adjusting via Dave's spreadsheet. I thought it was interesting that...
Attached are my out come after setting BPW to 145. This isafter making the adjustments to the VE1 from the spreadsheet with Historyaverage.
I think I’m running out of fuel up in the 2400 area. I...
35493550
I think you are correct that it’s running out of fuel at the top end. I do not know what the fuel pressure is. What a PIA it is to get the fuel pressure on a 1990 K1500 350 TBI!
I bought...
Here is what my History has been looking like. Of course not all of the cells are filled in. The truck runs a whole lot better then it did with a stock chip burn.
3548
It looks like it's time to...
This is all great info for VE tuning!
This is almost worth putting in a place when people are first starting out.
Thanks, MarkJ
I have followed the instructions in the 7747 ve1 + ve2 thread. I have run the history though the spreadsheet changes a lot of times. There are always differences. Anywhere from a BLM of 120 to 140....
No I don't have the HiWay Lean Cruise patch. I'm not really heading that direction with this truck. I'm working on towing power.
I copied the 60 to 100 from he Bin you attached and to this post and...
Found the TCC lockup problem. I was also following the *Off for BLM* notations on the "Scalars". I disabled all that where noted with the *Off for BLM*.
It turns out the "HiWay - Min Coolant"...
I'll take smaller steps this time. I will let you know what I find. This could take the rest of the week for me due to my schedule.
I changed more than the spark table.
I was still working with the scalars turning off the **Off for BLM** and **Read me Hack ** when I added the 60 to 100 section.