Better fuel pump for boost?

Tech discussions on the L77 6.0L V8.
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andrewquant
Posts: 38
Joined: Fri May 28, 2021 2:47 pm

Better fuel pump for boost?

Post by andrewquant »

So my fuel pressure is starting to run quite low when using E85, its dipping down to 25 psi at WOT and I am adding boost soon. Pretty safe to say I'll need a better fuel pump. Are there any PWM higher flow rate pumps out there? Ideally I would want a drop in replacement with 50% more output that the ZL1 pump thats already in there.
2013 PPV Phantom black 1,077 RWHP 1,015 RWTQ 9.9@148
LS3 stroker 417ci, Callies crank w/ Malhe pistons & Darton sleeves. 11.5:1
Procharger F1a94. 22 psi boost E85
Water/Meth + 180hp N20
BTR custom cam 235/257 .638/.629 116, BTR shaft rockers Johnson 2126 lifters
BTR Trinity intake Kooks headers w/ Solo exhaust 3"
CDT Level 4 trans build w triple disc TC
Holley 120lb injectors
MT ET Street R 305/45/R18 on 10" widened OEM wheels.
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BAZTEK
Posts: 21
Joined: Mon Oct 16, 2017 1:39 pm
Location: New Britain, PA

Re: Better fuel pump for boost?

Post by BAZTEK »

So, just curious, did you ever find anything to suit your needs? I have run into the same issue after installing a ProCharger D1X. I tried to get the Livernois Motorsports Firestorm dual pump kit, which I was told was a direct drop in, but they have no ETA on when they would be able to get me one.

I ordered a pump from Australia upon recommendation from an Aussie mate via KPM Fuel Systems. The StreetFighter series ranges from 800hp to 1500hp so I ordered their 1500hp drop in unit. It shipped same day and I was told it should take 7-10 days. It is in the US right now but held at customs so hopefully they took all that into account. I will report back with more info as I get it.
Mike Baz
____________________________________________
2012 Chevrolet Caprice PPV - Phantom Black Metallic
andrewquant
Posts: 38
Joined: Fri May 28, 2021 2:47 pm

Re: Better fuel pump for boost?

Post by andrewquant »

Yes. I went with the DSX tuning add-on pump because it works with the returnless system. I do like it a lot. I pretty much have it maxed out on E85 and 15 PSI of boost with my displacement though. I run it pretty lean (0.87) and spray meth to help out. It gets down to about 30 PSI of fuel pressure at the end of a WOT run, which was about how low it got before when I was just big cammed NA with no extra pump. It helps if you overkill it with your injector specs because you can run the lower fuel pressure and keep your duty cycle less than 100 still. Your pulsewidth just gets pretty high with the low pressure so you have to be able to pop in a huge burst of low pressure fuel in a very short time.
2013 PPV Phantom black 1,077 RWHP 1,015 RWTQ 9.9@148
LS3 stroker 417ci, Callies crank w/ Malhe pistons & Darton sleeves. 11.5:1
Procharger F1a94. 22 psi boost E85
Water/Meth + 180hp N20
BTR custom cam 235/257 .638/.629 116, BTR shaft rockers Johnson 2126 lifters
BTR Trinity intake Kooks headers w/ Solo exhaust 3"
CDT Level 4 trans build w triple disc TC
Holley 120lb injectors
MT ET Street R 305/45/R18 on 10" widened OEM wheels.
Sh00bs
Posts: 43
Joined: Tue Jun 22, 2021 7:32 am

Re: Better fuel pump for boost?

Post by Sh00bs »

i went with a Hellcat pump, cheap and good for power. could always run 2
bstoner
Posts: 233
Joined: Wed May 05, 2021 2:12 pm

Re: Better fuel pump for boost?

Post by bstoner »

Are you guys also re-programming the Fuel Pump module as well? I have read about people programming the ZL1 specs to it.
2014 Caprice PPV, 6.0L, BTR Stage 2 Cam, 3.45, 3" exhaust, Rotofab intake, Chris Henry tuned, future LSA....
andrewquant
Posts: 38
Joined: Fri May 28, 2021 2:47 pm

Re: Better fuel pump for boost?

Post by andrewquant »

I adjusted my tune on the stock FICM to account for the boost pump, but did not replace any hardware.
2013 PPV Phantom black 1,077 RWHP 1,015 RWTQ 9.9@148
LS3 stroker 417ci, Callies crank w/ Malhe pistons & Darton sleeves. 11.5:1
Procharger F1a94. 22 psi boost E85
Water/Meth + 180hp N20
BTR custom cam 235/257 .638/.629 116, BTR shaft rockers Johnson 2126 lifters
BTR Trinity intake Kooks headers w/ Solo exhaust 3"
CDT Level 4 trans build w triple disc TC
Holley 120lb injectors
MT ET Street R 305/45/R18 on 10" widened OEM wheels.
Ridgeppv
Posts: 74
Joined: Wed Oct 20, 2021 4:59 pm
Location: Indianapolis

Re: Better fuel pump for boost?

Post by Ridgeppv »

BAZTEK wrote: Wed May 25, 2022 6:45 pm So, just curious, did you ever find anything to suit your needs? I have run into the same issue after installing a ProCharger D1X. I tried to get the Livernois Motorsports Firestorm dual pump kit, which I was told was a direct drop in, but they have no ETA on when they would be able to get me one.

I ordered a pump from Australia upon recommendation from an Aussie mate via KPM Fuel Systems. The StreetFighter series ranges from 800hp to 1500hp so I ordered their 1500hp drop in unit. It shipped same day and I was told it should take 7-10 days. It is in the US right now but held at customs so hopefully they took all that into account. I will report back with more info as I get it.
Did the fuel pu.p show up from Australia yet?
Going boosted and looking at for a "drop in" pump.
2014 6.0L BTR Stage 2 Cam, DOD Delete, 3.45 diff, long tube headers, VCM OTR Intake
User avatar
BAZTEK
Posts: 21
Joined: Mon Oct 16, 2017 1:39 pm
Location: New Britain, PA

Re: Better fuel pump for boost?

Post by BAZTEK »

Sorry for the late reply but yes, the fuel pump showed up. It was super fast and easy to install TBH. I had to get the tune changed but KPM gives the instructions on how to do it and step by step install instructions too (with pictures). The car runs amazingly well now and is not starving for fuel nor are the duty cycles maxed out. With the stock pulley on the D1X (4 inch) making @ 6lbs of boost, the car put down over 750rwhp.
On a separate note:
I wish US Customs had their sh!t together because it sat in Texas at Customs for 3 weeks! I called them daily and got the run-around until I had a friend of a friend in Texas (who is in the gov't) look into it and then poof, it was on its way.
Mike Baz
____________________________________________
2012 Chevrolet Caprice PPV - Phantom Black Metallic
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