catch-22

iTrader: (2)

Posting this here too cause the PFC forum seems a little dead sometimes.

So im slowly working my way to 23 psi and currently im at 20 psi. First my cars backround- holset WH1E, 550/1600, supra pump, 50/50 water meth, 4in exhaust, streetport. Wanted you guys to take a look at my timing maps cause it feels like the car is getting held back. I was initially tuned for 15 pounds so i know it was fine at that pressure. Also what value are you running so the map will read to 23 pounds. thanks!

sorry i cant screen print im on a mac with windows

Leading

8 12 12 12 31 32 32 33 35 38 38 38 38 38 38 38 38 38 38 38
8 12 12 12 31 32 32 33 35 38 38 38 38 38 38 38 38 38 38 38
8 12 12 12 31 32 32 33 35 38 38 38 38 38 38 38 38 38 38 38
17 17 17 17 30 31 32 33 34 37 38 38 38 38 38 38 38 38 38 38
17 17 17 17 28 29 30 32 33 36 38 38 38 38 38 38 38 38 38 38
26 26 26 26 26 27 30 30 32 34 37 38 38 38 38 38 38 38 38 38
26 26 26 26 21 22 26 26 27 28 30 33 36 38 38 38 38 38 38 38
12 12 12 18 20 20 24 24 24 25 28 29 35 38 38 38 38 38 38 38
9 9 8 13 18 18 22 23 23 24 25 28 33 35 38 38 38 38 38 38
9 9 9 16 17 19 21 22 22 23 24 27 32 32 36 37 38 38 38 38
9 9 7 12 16 18 19 20 20 21 22 26 29 31 32 33 33 34 38 38
9 9 5 11 13 15 16 19 20 21 23 25 27 28 29 29 29 30 35 35
1 9 5 8 10 12 13 16 18 20 21 22 24 25 25 25 26 26 29 29
1 2 3 3 7 7 9 13 14 16 17 17 17 17 17 18 20 22 25 26
1 2 2 3 5 6 6 7 9 10 10 10 10 10 10 11 15 18 20 22
1 2 2 3 5 5 5 5 7 7 7 7 7 7 9 10 14 17 19 21
1 2 2 2 4 4 3 5 6 6 6 6 7 7 9 10 13 16 18 20
1 2 2 2 3 3 4 5 6 6 6 6 6 6 8 9 12 15 17 19
1 2 2 2 3 3 4 5 6 6 6 6 6 6 8 9 10 14 16 18
1 1 1 1 1 1 2 3 5 5 5 5 5 5 7 7 6 6 6 6

Trailing

5 9 9 9 28 29 29 30 32 35 35 35 35 35 35 35 35 35 35 35
5 9 9 9 28 29 29 30 32 35 35 35 35 35 35 35 35 35 35 35
5 9 9 9 28 29 29 30 32 35 35 35 35 35 35 35 35 35 35 35
14 14 14 14 27 28 29 30 31 34 35 35 35 35 35 35 35 35 35 35
14 14 14 14 25 26 27 29 30 33 35 35 35 35 35 35 35 35 35 35
23 23 23 23 25 24 27 27 29 31 34 35 35 35 35 35 35 35 35 35
23 23 23 23 23 19 23 23 24 25 27 30 33 35 35 35 35 35 35 35
9 9 9 15 17 17 21 21 21 22 25 26 32 35 35 35 35 35 35 35
6 6 5 10 15 15 19 20 20 21 22 25 30 32 35 35 35 35 35 35
6 6 6 13 14 16 18 19 19 20 21 24 29 29 33 34 35 35 35 35
6 6 4 9 12 14 15 16 16 17 18 22 25 27 28 29 29 30 34 34
6 6 2 8 9 9 10 13 14 15 17 19 21 22 23 23 23 24 29 29
-2 6 2 5 6 6 5 8 10 12 13 14 16 17 17 17 18 18 21 21
-2 -1 0 0 3 1 1 3 4 6 7 7 7 7 7 8 10 12 15 16
-2 -1 -1 0 1 0 -2 -3 -3 -2 -2 -2 -2 -2 -2 -1 3 6 8 10
-2 -1 -1 0 1 -1 -3 -5 -5 -5 -5 -5 -5 -5 -3 -2 2 5 7 9
-2 -1 -1 -1 0 -2 -5 -5 -6 -6 -6 -6 -5 -5 -3 -2 1 4 6 8
-2 -1 -1 -1 -1 -3 -4 -5 -6 -6 -6 -6 -6 -6 -4 -3 0 3 5 7
-2 -1 -1 -1 -1 -3 -4 -5 -6 -6 -6 -6 -6 -6 -4 -3 -2 2 4 6
-2 -2 -2 -2 -3 -5 -6 -7 -10 -10 -10 -10 -10 -10 -8 -8 -9 -9 -9 -9

catch-22

iTrader: (2)

PIM values are

1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
16000
18000
20000
22000
24000

Howard Coleman

iTrader: (6)

before you get into the actual settings i suggest you change the "Y" PIM scale. you are wasting the more important tuning area (BOOST) by using 11 of your cells for vacuum. you should use 7 as below. further, the progression should look linear (as to slope) on a line chart which yours isn't.

here's mine. to solve for PSI take the (PIM number/10,000 X 14.22) minus 14.7 my settings are good to 27 and have doomsday preventative numbers in the #20 slot.


2510
4000
5180
6600
7770
8940
10290
11690
13200
14620
16000
17460
19300
20900
22600
24400
26600
28500
29250
30000


26,600 is 23.1 psi

26,600/10,000 = 2.66 * 14.22 = 37.82 - 14.7 = 23.12

of course if you change the Y scale you will also have to change timing and base fuel. think of all the fun you'll have.

catch-22

iTrader: (2)

Right on howard thanks alot. By changing this its going to mess up all the tuning done before hand correct?

WaachBack

iTrader: (21)

Yes.

Your timing is mildly safe, but could be toned down a degree or two. 20 leading advance is kind of on the high side at 20psi on pump even with A/I. You have to remember that the PFC adds 2 degrees of timing in the upper RPMS.

Your split looks fine.

Id be able to advise better on your timing if I saw your EGTs.

thewird

iTrader: (8)

Your map won't work for the boost you want to run. You need to change your scaling as Howard suggested but that will change your entire map. Your "being held back" because of your last row which is tuned as a safety row for overboost. Your can bump it up a few degrees BUT your scaling isn't setup for that kinda boost and I wouldn't suggest upping the boost anymore until your properly scale your map. At 23 PSi of boost, I'd probably approaching 10-11 degrees (maybe less) of leading timing at high/peak RPM. Of course every engine/setup is different and depends on other factors.

thewird

arghx

iTrader: (3)

What Howard is suggesting will take some time because the difference in interpolation could change your real world AFR's. Just throwing your current maps into a spreadsheet to convert everything over to the new scaling won't cut it. Been there, done that. You may end up spending a lot of time tuning off-idle and a bunch of other driveability stuff.

If you just change the P20 row you will save yourself the work of rescaling but you will have low resolution in that high boost area. So it will be tricky to get it dialed in. Both methods can be made to work, but there is no quick solution really. My scaling is one of the simpler methods. P1-P10 go up to 10000 PIM just like default. P11-P20 go up to 30000, in increments of 2000 PIM (so 12000, 14000, etc). Every row is evenly spaced so getting the interpolation figured out isn't too bad. And at least the PFC has 20x20 maps. A lot of other systems don't even have that.

thewird

iTrader: (8)

Deleting the 1000 and 15000 would give you 2 more rows up to up to 28000 and be plenty enough for what you need and still allow a safety row. That's what I did on mine. This year I might delete 13000 since I might be trying 30 psi

thewird

catch-22

iTrader: (2)

ok thanks alot guys think ill give what you said a try wird because i really dont wanna do driveability stuff again cause i have it right where i want it. Just so I get this straight i would be starting out with 2000 as the first value and do away with 15000 all together? How will this effect the idle zone?