Viking0728

I bought a used 2016 Z06 that has:
*LMR Heat Exchanger Kit w/2.5 Gallon Tank
*Weapon X Ported TB
*Weapon X “Griptec” Upper Pulley
*DSX Flex Fuel Kit
*AEM Wideband
*Corsa Long Tube Headers extreme exhaust
*AFE Intake

The car runs perfectly under normal driving... I took it out to the drag strip twice. The first time with a full tank of e85 and made it about 3/4 of the way before getting the Reduced Engine Power and check engine light. Codes were fuel rail pressure
The second time I went out with half e85 half 93 octane (since I still had half a tank of e85). Same issue, 3/4 of the way, Reduced Engine Power and check engine.

I thought there was maybe something wrong with the tune, but after reading through the forum it seems like my fuel system can't keep up. So, how much of a fuel system "boost" do I need to make the mods I have work? I've seen everything from $300 for a ZR1 pump to multiple thousands for an improved fuel system. Any suggestions?

Thanks in advance

FYREANT

Viking0728

I'm not looking to get more power, at least not that I can imagine. I just want to get what I have working for an occasional trip to the drag strip and track days. I'm also trying to not have my wife lose her mind when I tell her how much more I need to spend...

fatsport

it's a flex fuel sensor, so you don't have to run a high blend. I've read in many threads on here that you'll get 90% of the gains from the tune and sensor with E35-E40. Fuel system should have enough to push that. Others with more knowledge can chime in, or you can just search "E85" in the Z06 forum.

555ctsv

I would guess the tune could be modified to be a little more forgiving on when to trigger the reduced power mode, but i would start with a low side aux fuel system. I have run 2 brands of these kits (on separate cars) and at your power levels would suggest the new DSX kit. It's $1,000 but install is a breeze. Replacing the in tank pump may sound cheaper but wait to you see what the install cost will be!

The DSX kit is literally plug and play (minus drilling a relatively small hole into the gas tank), all the wiring and tapping into the fuel line just plug into place

DSX kit: https://dsxtuning.com/collections/aux-fuel-filters/products/auxiliary-fuel-pump-kit-for-2014-corvette

Oh4GTO

With the DSX, or any others that tap the tank, do you have to maintain a certain fuel level to not starve the pickup?

Higgs Boson

did you buy the car directly from the original owner?

Matthewstorm

0DSX Tuning

Viking0728

Yes, and he provided the invoice of the work done from the performance shop that installed everything. I just texted him and confirmed that no fuel system modifications were added. I ordered the DSX auxiliary fuel pump kit and will be installing that prior to getting a new tune.

Viking0728

Have you tried it on the drag strip? I hit 97 mph in the 1/8 and then coasted across the finish at 107 mph /12 seconds with the REP warning message. Normal driving is perfect, but WOT sustained seems to be the problem.

555ctsv

The tap is at a really low and back part of the tank so I've never had an issue but i do try to keep the level above 1/4 tank before having any crazy fun

Matthewstorm

Haven't hit the drag strip but hit 120 on the back roads here a couple of times. No issues.

0Livernois Motorsports

In our opinion and all of the experience we have had with these vehicles even on a no mod application the stock fuel system struggles to supply enough fuel for any sort of full throttle scenarios we know there are some shops out there who would go against this and say it is possible but we always like to make sure the builds we do for our customers keep their cars on the roads without having any major issues. In ANY application we have done here with E85 on these vehicles they have been done with an auxiliary fuel system such as methanol to help supplement enough fueling for the vehicle to actually safely make power. Check out this twin turbo build we did a little while back making over 1000rwhp!

Toddiesel

Is your dyno tech in witpro?? Why is he(she?) all blurred out??

Matthewstorm

0Livernois Motorsports

Typically speaking the calibrators do not like to be on camera that much as their personal preference

spinkick

Dyno guys carry their reputations with them as they move around in the business, I'm sure. A big part of a shop being selected for work is based on their dyno guys' rep. I'm sure blurring yourself out helps protect that to some extent.

Avanti

"... calibrators do not like to be on camera..." Pride in their work? So much for advertising.

hogurt