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Challenger SRT Hellcat
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Do you need to re-tune after fuel pump work?

I wonder how many people on here have made these posts with parts on a table, but never actually installed them......

Without pics, your install experience, or a detailed installation run down, this post is not helping anyone that searches
"Fore fuel pump"
 

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3,717 Posts
No retune needed, the 2 pumps will now just follow the original pressure command but now have extra flow capacity behind them when needed. ie if single pump needed to run at 80% duty cycle (89% is max, no idea why not 100% but 89% is max) new double pumps may only need to run at 55% duty cycle to maintain the “Desired Pressure” the computer is set to maintain.
 

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3,717 Posts
Not that it matters, can’t get E85 anywhere in Fl at the pump right now, car has been sitting for weeks
Running 93 octane gasoline at the moment here in PA on a flex tune, alcohol % went from reading 9-11% E to 0%, I thought it wasn’t reading right, tested the fuel with a electronic tester, 0% Ethanol in the fuel!! Seems they don’t even have enough to blend into gasoline of late, maybe that’s helping drive up the cost of gasoline.
 

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2019 Charger hellcat redeye swap
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133 Posts
Discussion Starter · #9 ·
Installed yet? Been 3 hours since your post, should be done by now?
Well after 2 weeks here's the update. It took me about 5 or so hours to install, it was more than straight forward as tapp's guide installation video and pdf make it a breeze to go through it. I did have a helping hand as my kid kept coming into the garage because his ipad kept dying and that just prolonged a lot of things. Car started up after the install and no tune was needed.. currently running 91 but have a e85 gas station in my city. I would rate this plug an play 9.5/10
The next feat is going to replace my current coolant pump with an aftermarket one.
 

· Registered
2019 Charger hellcat redeye swap
Joined
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133 Posts
Discussion Starter · #10 ·
Do you need to re-tune after fuel pump work?

I wonder how many people on here have made these posts with parts on a table, but never actually installed them......

Without pics, your install experience, or a detailed installation run down, this post is not helping anyone that searches
"Fore fuel pump"
sorry I didn't have notifications on, so I just thought no one was interested in my thread. I will be replying later tmr or tuesday with a full photo break down of what I had to do and did. hopefully that helps.
 
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