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Project LPFP: Installing a 2019 ZR1 Low Pressure Fuel Pump in a 14’ Stingray
I’m going to be trying to pioneer an upgrade for the 2018 and lower C7 community. Many of us who mod the C7 run out of low side fuel pressure at higher horsepower levels. The C7 ZR1 low side fuel pump flows 20% more fuel (per Tadge) and seems to be also being used for the 2019 Z06 (based on confirmed part numbers).
Please note, this is not a substitute for an aftermarket low side system, but rather a small step in the same direction. Those kits pump a lot more, but they require you to drill a hole in the tank which I am not a fan of doing. So, I’m gonna see if I can get a lil bit more fuel this way. Yes, its a lot of work for a little payoff. But I’m crazy like that. Many of you know that already lol.
This project will see me attempting to retrofit this pump into my 2014 Stingray to get the extra flow. Here are pics of the 2019 ZR1 / 2019 Z06 low pressure fuel pump. If anyone has pics of the earlier model LPFP’s from earlier C7’s please post a pic of it along with a pic of the connector so we can see if they are different in anyway!
Interesting that the part number is 1 digit higher on the pump. I ordered part number 84240348 (which is on the label of the box from GM) but the part number on the pump itself is 84240349. I assume it is a slight revision.
Working to stick with OEM is usually worth it. This, plus maybe some larger lines, plus the drilled out HPFP, plus some larger injectors can get people to where they want to be without having to add PFI.
Working to stick with OEM is usually worth it. This, plus maybe some larger lines, plus the drilled out HPFP, plus some larger injectors can get people to where they want to be without having to add PFI.
I’m not sure about drilling out the HPFP. The Z06 HPFP and Z06 injectors seem to be enough for me for now. Though, I also run 30GPH of meth lol
I have to find the link. A vendor has a larger bore ID on the mechanical pump. More volume. Add in the 30% bumpstick, and larger injectors, and IIRC it was 1k capable.
I am familiar with the lingenfelter pump. Its only 10% volume increase over the stock LT4 pump and is said that you cannot use a lash cap. That makes it garbage in my opinion. You can use the stock LT4 pump and then add a lash cap to increase that another 20-25%. Z06 injectors have been good enough for me at this point as well as many others. No way would I spend those kind of chips on injectors when you can add meth for a fifth of the price!
Those solutions are all related to the high side though. So lets jump back on topic of upgrading the intank pump via OEM parts
Don’t have the size specifics. Just that Tadge specifically answered a question from the forum and pointed the low side pump out as being 20% more flow. You can read about it here:
is there a Liter per hour rating on this zr1 pump yet? I was looking for it, with no luck
not that I know of. I’m in a bit of a holding pattern with this project right now as I decided to rebuild the motor again with even stronger parts. Pulled the motor a couple weeks ago and have been working on it slowly.
So what? Ever heard of multitasking? Get to it, chop chop! For starters you could pull the shield covering the stock pump and verify that the plug is the same. Then, you could look into the fuel pump controller part numbers, from there we need to compare tables in the tunes. I think it can be done, and for those of us at the point where we just can’t quite keep up the low side (not the 1200hp guys lol) this would be ideal if we don’t need to replace an expensive module as well. Maybe the zr1 pump in conjunction with a BAP would work well.
So what? Ever heard of multitasking? Get to it, chop chop! For starters you could pull the shield covering the stock pump and verify that the plug is the same. Then, you could look into the fuel pump controller part numbers, from there we need to compare tables in the tunes. I think it can be done, and for those of us at the point where we just can’t quite keep up the low side (not the 1200hp guys lol) this would be ideal if we don’t need to replace an expensive module as well. Maybe the zr1 pump in conjunction with a BAP would work well.
Easy there killer! Lol
I have a copy of a 2019 Z06 tune now so we can compare the tunes. What shield you talkin bout Willis? Not the one on the bottom of the tank surely. I had that one off yesterday actually..
GM use the same lift side low side in tank fuel pump on the C7 & Z06. the fuel pump is controlled buy a control module which is located in the lift wheel housing by the parking brake. Z06 & C7 all so use the same control module but with different programing.
06-07-2018, 08:55 PM
Project LPFP: Installing a 2019 ZR1 Low Pressure Fuel Pump in a 14’ Stingray
