[Gmanuel]

Anyone have figures for the DC they're seeing on the injectors at high power levels?

[parish8]

Went for a spin no cel or codes with the new pump.

[parish8]

Originally Posted by Gmanuel

Anyone have figures for the DC they're seeing on the injectors at high power levels?

Most people talk about spray time. Somewhere between 6 and 8ms is the limit.

[Perdieu]

Originally Posted by parish8

Went for a spin no cel or codes with the new pump.

Outstanding.

Can you post a better photo showing the exact location to cut if someone wanted to do it that way.

I'll post a write up for dropping the tank and doing it that way.

[Gmanuel]

Originally Posted by parish8

Most people talk about spray time. Somewhere between 6 and 8ms is the limit.

Nice. Should have known it would more come down to the injection window, than the flow. Although, more flow means you don't need as much spray time.
So my shopping list for right now is:
LPE high pressure pump
ZL1 pump
Voltage booster

As far as psi on the low pressure side: on the BMW platform, we used to try and maintain 60psi minimum, but that's because the low pressure side was at 72psi stock. The injection pressure was 3k psi.

[parish8]

Originally Posted by Perdieu

Outstanding.

Can you post a better photo showing the exact location to cut if someone wanted to do it that way.

I'll post a write up for dropping the tank and doing it that way.

All I have is the picture in the first post. It is all sealed up now. I knew I would be messing around a fair amount and want access but for most people I think dropping the tank would be the way to go. With a lift it shouldn't be too bad. Exhaust and driveshaft take very little time.

That being said my procedure was loosen the tank and lower it about 1" on the passenger side. Then carefully drill a small hole. Theen Feel around with a pic or something to see how much room there is. Then I drilled a larger hole and used an air nibbler to cut the hole. I wouldn't use a grinder unless the tank was completely removed. The tank, hoses and wireing and pretty much touching the floor in places.

[urr2slo]

Originally Posted by parish8

All I have is the picture in the first post. It is all sealed up now. I knew I would be messing around a fair amount and want access but for most people I think dropping the tank would be the way to go. With a lift it shouldn't be too bad. Exhaust and driveshaft take very little time.

That being said my procedure was loosen the tank and lower it about 1" on the passenger side. Then carefully drill a small hole. Theen Feel around with a pic or something to see how much room there is. Then I drilled a larger hole and used an air nibbler to cut the hole. I wouldn't use a grinder unless the tank was completely removed. The tank, hoses and wireing and pretty much touching the floor in places.

I'm not a fan of cutting a hole in the floor, it feels like its a hack job to me so I could never do that, I have a lift and it only took me 45 minutes to remove the tank. I actually took me longer to swap out the module, big hands are not good trying to get the lines in the tank off and on. I was actually surprised on how easy it is to R&R the tank. First thing that's been easier to do than on a 5th Gen.

[jwdominick]

Bumping an old thread here, questions for those that have done the intank pump. I see all the modules listed do not include the sender module, i assume the one on our existing pumps swaps over? Can anyone confirm? Or is it a separate unit (i've seen that before too). In the past i've seen fpcm codes pop up if you swap pumps, anyone see that?

Lastly on gas or e85 is the zl1 intank pump sufficient to support 600rwhp? Or does one need to get the HPFP and or injectors as well?

Thanks in advance

[Hyper SS]

Did you get to WOT? I am considering this and am worried about the fuel pump control module. I have a 16 SS. No codes or cel?

Originally Posted by parish8

Went for a spin no cel or codes with the new pump.

[parish8]

I have beat on the car hard with no issues.

the zl1 intank pump and lt4 hpfp and injectors max out over 600rwhp with e70 on a dynojet. I don't know the exact point they run out.

[Stefano]

On my personal 2016 SS A8, which has ZL1 intank pump, LT4 HPFP and injectors we have seen 680 rwhp and over 700 rwhp with E85. Our data shows that our combo is at the fuel limit on E85, but sound and solid on pump gas.

I have some ideas and plans to check out soon, just been too busy with customers cars.

Also have a KB Boost-a-pump.

[ProCharger]

Originally Posted by laynlo15

Can't you use a boost a pump? I did that on my LSX Malibu I built a few year ago. Doesn't that do the same thing the Zl1 pump does? Is the voltage booster the same thing you were talking about?

I have used them on (3) recent tunes I have done on these cars.
In all three cases it drastically helped the LPFP hang on.

[Stefano]

Just updated my post as I did use a boost a pump as well.

[ProCharger]

Originally Posted by Gmanuel

Anyone have figures for the DC they're seeing on the injectors at high power levels?

DC really has no bearing on these cars.

The injector can do more then what is allowed for DI combustion.

Your ms, and your injection timing, and injection window are the keys to the puzzle. ....oh and HPFP pressure.