C6 Fuel Pump Upgrade Help
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Cruising
Joined: Oct 2025
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C6 Fuel Pump Upgrade Help
Hey everyone, I’m looking for some advice on what the best in-tank fuel pump is for a C6 making around 550 rwhp. I’ve been leaning toward the Lingenfelter C6 High-Flow Fuel Pump Module, but I can’t seem to find many real reviews or feedback from people actually running it. I’ve also looked into the Racetronix 450, but I’ve read quite a few negative reviews about reliability and pressure issues. I really don’t want to go with an external fuel pump setup, so I’m hoping to hear from people who have experience with either of these or have other solid in-tank options to recommend. Any input on their performance and reliability would be greatly appreciated.
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Burning Brakes
Joined: Nov 2011
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Stock Z06 pump will be more than enough for 550rwhp.
This is all you need,
https://www.racetronix.biz/k/c5-c6-2.../rfpk-475-450e
This is all you need,
https://www.racetronix.biz/k/c5-c6-2.../rfpk-475-450e
Safety Car
Joined: May 2006
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From: Potomac MD
I agree with guy above stock Z06 pump is all you need and you do not need to rewire it. Any pump with substantially more flow you will need to run a new power wire to it. The stock Z06 pump flows like 10%-15% more than the regular pump. The Z06 pumps takes 11 amps of current the other bigger pumps are in the high teens and thus need a bigger wire/fuse. Also be wary of the tank level sensor 2003-2006 had one ohm reading 2007 and later had another.
Last edited by double06; Oct 14, 2025 at 08:28 AM.
Thread Starter
Cruising
Joined: Oct 2025
Posts: 13
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I agree with guy above stock Z06 pump is all you need and you do not need to rewire it. Any pump with substantially more flow you will need to run a new power wire to it. The stock Z06 pump flows like 10%-15% more than the regular pump. The Z06 pumps takes 11 amps of current the other bigger pumps are in the high teens and thus need a bigger wire/fuse. Also be wary of the tank level sensor 2003-2006 had one ohm reading 2007 and later had another.
Pro
Joined: Oct 2024
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From: WI
https://www.racetronix.biz/p/c5-6-co...arness/iph-008
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Thread Starter
Cruising
Joined: Oct 2025
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I would definitely consider the racetronix 450 drop-in pump. Since you already have the hotwire harness installed, you just need to add the intermediate pump harness when dropping your tank to fully upgrade your wiring.
https://www.racetronix.biz/p/c5-6-co...arness/iph-008
https://www.racetronix.biz/p/c5-6-co...arness/iph-008
Burning Brakes
Joined: Nov 2011
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I have the Racetronix link above with Kenne Bell Boost a pump, A&A supercharger, 80lb injectors with heads/cam making 770 rwhp and have no concerns.
Thread Starter
Cruising
Joined: Oct 2025
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Why? Boost-a-pumps are perfectly acceptable additions and hardly ever fail. Unless something is amiss here I think the classic case of don't fix it unless its broken applies.
I have the Racetronix link above with Kenne Bell Boost a pump, A&A supercharger, 80lb injectors with heads/cam making 770 rwhp and have no concerns.
I have the Racetronix link above with Kenne Bell Boost a pump, A&A supercharger, 80lb injectors with heads/cam making 770 rwhp and have no concerns.
Last edited by mfsr; Oct 15, 2025 at 05:34 AM.
Thread Starter
Cruising
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Pro
Joined: Oct 2024
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From: WI
That doesn't sound right. Was it hooked to a hobbs switch so it only activated during boost? 99% of the time while driving the fuel pump booster should not be active.
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Cruising
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Yea i got it with the a&a supercharger kit and i had a professional shop that specializes in corvettes and superchargers put it on for me
Le Mans Master
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From: Wilkes-Barre Pa
Thread Starter
Cruising
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I went this route https://ecsgarage.com/products/ecs-s...to-13-corvette