Some passes after multiple changes finally
08-16-2017, 01:13 PM
#21
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Same position as me sounds like but I'm already 11.0-11.2 AFR so there isn't much room. I'm going to raise fuel pressure, if pump can't keep up I'll add an inline AEM or Bosch 044
08-17-2017, 09:40 AM
#22
Man, the NEW injectors are already at 97%? That's unfortunate. Hopefully that scaled back quite a bit with the AFR change. Glad you got out with it Ron. I'm sure it was a fun time. Mine will actually be headed back out for the first time in 18 months in the next 2 weeks. First have to do some tuning, and schedule a dyno appt.
08-20-2017, 12:04 PM
#33
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Turns out I'm at 50psi base pressure. Right now at 12.5-13psi with 14* of timing and low 11's AFR I'm at 95% IDC at the top of my shifts. Calculating about 780WHP to go 113 to the 1/8 at 3900lbs. If I bump my base to 60psi I wonder how much extra fuel that will supply? Is there some type of calculator out there?
I see tons of guys making 950-1000whp with this Holley 12-1800 I'm no where near
08-20-2017, 05:23 PM
#34
I see!
Turns out I'm at 50psi base pressure. Right now at 12.5-13psi with 14* of timing and low 11's AFR I'm at 95% IDC at the top of my shifts. Calculating about 780WHP to go 113 to the 1/8 at 3900lbs. If I bump my base to 60psi I wonder how much extra fuel that will supply? Is there some type of calculator out there?
I see tons of guys making 950-1000whp with this Holley 12-1800 I'm no where near
Turns out I'm at 50psi base pressure. Right now at 12.5-13psi with 14* of timing and low 11's AFR I'm at 95% IDC at the top of my shifts. Calculating about 780WHP to go 113 to the 1/8 at 3900lbs. If I bump my base to 60psi I wonder how much extra fuel that will supply? Is there some type of calculator out there?
I see tons of guys making 950-1000whp with this Holley 12-1800 I'm no where near
The aux pump comes on at 15 psi boost.
I target 11.2:1. I'm sure it would be fine at 11.5-11.7. That will add a little headroom.
With raising the base to 55 and leaning the fuel to commanded, I saw less than 80% idc last night.
One thing required is a good voltage supply. The pumps drop off if the volts go low, so monitor that as well. I see 13.9v throughout the run.
My buddies wagon has serious voltage issues. It falls below 12 during the run negating the boost referenced FPR. I'm pretty stumped on his car. It's wired just like mine........
We finally added a pressure sensor and logged it last night.
And even with that, it ran 8.97@154 last night and 12:1 AFR........I can't reign him in......he only knows turn it up.
It's at 133% IDC.........
BTW......track was slick last night as usual. 1.6 60 ft first pass leaving at 3psi.
So I put the 275 pros at 14 psi. Next two hits were both 1.52. Still sad.....but it controlled the spin.
And I short shifted it every pass but needed to control the spin.
Last edited by RonSSNova; 08-20-2017 at 05:30 PM.
08-20-2017, 05:28 PM
#35
I want it to do it by itself.
I'm grounding the orange wire with the car in first gear. When I shift to second, that switch un-grounds and the next switch grounds the green wire.
So it should go from boost group 1 to boost group 2. Both are set up.
It stays in boost group one......
08-20-2017, 05:42 PM
#36
I have the 12-1800 and the little half brother, I forget the part number.
The aux pump comes on at 15 psi boost.
I target 11.2:1. I'm sure it would be fine at 11.5-11.7. That will add a little headroom.
With raising the base to 55 and leaning the fuel to commanded, I saw less than 80% idc last night.
One thing required is a good voltage supply. The pumps drop off if the volts go low, so monitor that as well. I see 13.9v throughout the run.
My buddies wagon has serious voltage issues. It falls below 12 during the run negating the boost referenced FPR. I'm pretty stumped on his car. It's wired just like mine........
We finally added a pressure sensor and logged it last night.
And even with that, it ran 8.97@154 last night and 12:1 AFR........I can't reign him in......he only knows turn it up.
It's at 133% IDC.........
BTW......track was slick last night as usual. 1.6 60 ft first pass leaving at 3psi.
So I put the 275 pros at 14 psi. Next two hits were both 1.52. Still sad.....but it controlled the spin.
And I short shifted it every pass but needed to control the spin.
The aux pump comes on at 15 psi boost.
I target 11.2:1. I'm sure it would be fine at 11.5-11.7. That will add a little headroom.
With raising the base to 55 and leaning the fuel to commanded, I saw less than 80% idc last night.
One thing required is a good voltage supply. The pumps drop off if the volts go low, so monitor that as well. I see 13.9v throughout the run.
My buddies wagon has serious voltage issues. It falls below 12 during the run negating the boost referenced FPR. I'm pretty stumped on his car. It's wired just like mine........
We finally added a pressure sensor and logged it last night.
And even with that, it ran 8.97@154 last night and 12:1 AFR........I can't reign him in......he only knows turn it up.
It's at 133% IDC.........
BTW......track was slick last night as usual. 1.6 60 ft first pass leaving at 3psi.
So I put the 275 pros at 14 psi. Next two hits were both 1.52. Still sad.....but it controlled the spin.
And I short shifted it every pass but needed to control the spin.
08-20-2017, 06:08 PM
#37
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I have the 12-1800 and the little half brother, I forget the part number.
The aux pump comes on at 15 psi boost.
I target 11.2:1. I'm sure it would be fine at 11.5-11.7. That will add a little headroom.
With raising the base to 55 and leaning the fuel to commanded, I saw less than 80% idc last night.
One thing required is a good voltage supply. The pumps drop off if the volts go low, so monitor that as well. I see 13.9v throughout the run.
My buddies wagon has serious voltage issues. It falls below 12 during the run negating the boost referenced FPR. I'm pretty stumped on his car. It's wired just like mine........
We finally added a pressure sensor and logged it last night.
And even with that, it ran 8.97@154 last night and 12:1 AFR........I can't reign him in......he only knows turn it up.
It's at 133% IDC.........
BTW......track was slick last night as usual. 1.6 60 ft first pass leaving at 3psi.
So I put the 275 pros at 14 psi. Next two hits were both 1.52. Still sad.....but it controlled the spin.
And I short shifted it every pass but needed to control the spin.
The aux pump comes on at 15 psi boost.
I target 11.2:1. I'm sure it would be fine at 11.5-11.7. That will add a little headroom.
With raising the base to 55 and leaning the fuel to commanded, I saw less than 80% idc last night.
One thing required is a good voltage supply. The pumps drop off if the volts go low, so monitor that as well. I see 13.9v throughout the run.
My buddies wagon has serious voltage issues. It falls below 12 during the run negating the boost referenced FPR. I'm pretty stumped on his car. It's wired just like mine........
We finally added a pressure sensor and logged it last night.
And even with that, it ran 8.97@154 last night and 12:1 AFR........I can't reign him in......he only knows turn it up.
It's at 133% IDC.........
BTW......track was slick last night as usual. 1.6 60 ft first pass leaving at 3psi.
So I put the 275 pros at 14 psi. Next two hits were both 1.52. Still sad.....but it controlled the spin.
And I short shifted it every pass but needed to control the spin.
So you went from 50 base to 55 and dropped to under 80%? What were you at previously?
08-20-2017, 06:20 PM
#38
Remember, I was dead fat last week, so I corrected the VE table to fix that.
Spot on at 11.2 AFR now.
But I was only at 17psi......it's going to get a bit worse when I crank it up.
However, the boost referenced FPR should make it not too bad.
08-20-2017, 06:23 PM
#39
I'll rig up a voltage divider to connect to the alt output so I can log that with HPT. Need to start at the source.
I have a powermaster 14.8v unit. It works nice......as I had similar issues before.
