Post up your Pump Efficiency Table!!

[tryingbe]

I had to adjust the pump efficiency table for my car so maintain 11.5:1 air fuel ratio throughout the RPM range. Post yours!

Blue is mine now, green is from T-SMEC_22_MTX_A553_Stock

http://www.thelostartof.net/tryingbe/dodge/CSX/pumpeff.JPG

[roachjuice]

geez what are you running a 16v head? when i did adjust the pump eff table, its never made a difference. ever. ive always adjusted the fuel table and run the pump eff table where it sits stock. i dont touch timing either. last time i adjusted timing to what some say was "stock" in boost, i blew chit up. tune i use now is a 87 mopar stage 2 tune mtx 2.2 scaled for 3 bar and +40's. running 20psi on a s60 turbo no knock. 91 octane. 11:3afr past 10psi of boost. 17:5 afr idle. 15:0-15:5 cruising. the afr line (little yellow line) in the fuel maps is pretty close to what it reads on the wideband. so i tune it with the actual fuel maps.

[wowzer]

... the afr line (little yellow line) in the fuel maps is pretty close to what it reads on the wideband. so i tune it with the actual fuel maps.

if you can ever get a log of your wideband that includes afr, rpm and vacuum/boost - i'ld really like to see it (along with the cal u use).

[roachjuice]

I don't log. Lol. But I do know I set the afr line on 11:0 for wot and set my wot fuel table on it and it was 11:0 out the box. Thats pretty close to me. I turned my fuel pressure down 1psi and its 11:3 afr now. Gets a little richer like 10:9 at 5800rpm. I shift at 6000. The cal is lm v13 and it's the 87 mp stage 2 2.2 mtx tune that's on it. I haven't touched anything in the tune except turned the overboost off, 3 bar, 40's, leaned the idle up a little, adjusted wot fuel to match the afr line and flash cel mod. That's it.

[ShelGame]

I don't log. Lol. But I do know I set the afr line on 11:0 for wot and set my wot fuel table on it and it was 11:0 out the box. Thats pretty close to me. I turned my fuel pressure down 1psi and its 11:3 afr now. Gets a little richer like 10:9 at 5800rpm. I shift at 6000. The cal is lm v13 and it's the 87 mp stage 2 2.2 mtx tune that's on it. I haven't touched anything in the tune except turned the overboost off, 3 bar, 40's, leaned the idle up a little, adjusted wot fuel to match the afr line and flash cel mod. That's it.

If you're running a stock (or near stock) head, cam, intake, you wouldn't need to touch the PEFTBL...

[roachjuice]

Taft stage 2 cam stock swirl head and a ported exhaust manifold. So it makes since. But I had a ported head on my other setup and never touched the pump eff table.

[tryingbe]

Gets a little richer like 10:9 at 5800rpm.

Sounds like you can get a little more power by leaning it out just a bit at that RPM by using the Pump Efficiency table.


The car with the posted pump efficiency table is a CSX with a Forward Motion E3 port head, Forward Motion modified turbo, etc. It ran 99.7 MPH at 13psi, full trim with working a/c and spare tire. 1/4 mile calculator says it's making around 220-240HP at the crank.

[roachjuice]

Sounds like you can get a little more power by leaning it out just a bit at that RPM by using the Pump Efficiency table.


The car with the posted pump efficiency table is a CSX with a Forward Motion E3 port head, Forward Motion modified turbo, etc. It ran 99.7 MPH at 13psi, full trim with working a/c and spare tire. 1/4 mile calculator says it's making around 220-240HP at the crank.

I'm assuming move the point closest to where the rich/lean condition? I might give it a whirl.

[Force Fed Mopar]

I'm assuming move the point closest to where the rich/lean condition? I might give it a whirl.

Yeap. I may try it myself, mine gets a bit richer up top too, around 5k. Actually mine starts out rich, leans out to around 11.1-11.2, then goes back rich again :) I need to setup datalogging on the WBO2 but my laptop battery is killed again and haven't had money to fix it yet.

[tryingbe]

Have to adjust my table again so the top end is 11.5:1 instead of 12:1.

It's perfect now.

http://www.thelostartof.net/tryingbe/dodge/CSX/pumpeff1.JPG

[speedfreek500]

Have to adjust my table again so the top end is 11.5:1 instead of 12:1.

It's perfect now.

http://www.thelostartof.net/tryingbe/dodge/CSX/pumpeff1.JPG

Great info, What was the afr before the changes?

I'am not sure if moving the line up or down will bring the afr up or down.

[roachjuice]

Iirc moving the line up is making it richer. Moving down is leaner.

[ShelGame]

Iirc moving the line up is making it richer. Moving down is leaner.

Correct.