C8 Tuned on E85
Thread Starter
Intermediate
Joined: Sep 2011
Posts: 45
Likes: 14
From: Belleville MI
in my mind its the only proven hp gain of that size for that amount of cash. You could do full bolt on and spend 7k+ and still make less power. Its the first step in getting more for any future mods. It sucks but thats the "corvette tax" at the moment.
Melting Slicks
Joined: Aug 2000
Posts: 2,425
Likes: 1,198
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
With a tune delivering 50 to 60 hp/tq to the wheels versus a quality Cat Back costing 5K or more, a tune is the way to go. My preference is a 92% high flow thermal Cat and the stock performance valved thermal exhaust that delivers plenty of volume. With a tune the annoying AFM/V4 and cold start is deleted.
Melting Slicks
Joined: Aug 2000
Posts: 2,425
Likes: 1,198
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
Full FlexFuel tuning uses an inline ethanol content sensor to balance the maps. You have two separate tunes, one on pump gas and and with straight E85, then the sensor's output determines how the two maps are blended together to account for the actual ethanol content. This is also helpful as pump E85 can vary in percentage between stations, seasons, etc.
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,102
From: Fulshear, TX
Burning Brakes
Joined: Oct 2019
Posts: 841
Likes: 526
From: Colorado Springs
Full FlexFuel tuning uses an inline ethanol content sensor to balance the maps. You have two separate tunes, one on pump gas and and with straight E85, then the sensor's output determines how the two maps are blended together to account for the actual ethanol content. This is also helpful as pump E85 can vary in percentage between stations, seasons, etc.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Oct 2005
Posts: 5,052
Likes: 889
From: Tampa Florida
Melting Slicks
Joined: Mar 2005
Posts: 2,352
Likes: 230
From: Northeast FL
Intermediate
Joined: Jun 2024
Posts: 34
Likes: 28
Very nice. I am a long time flex fuel user from other Chevy platforms but new to C8. Does our car have enough factory fuel system to run full e85 or will you have to mix to a certain max ethanol content, such as e50 or e60?
Melting Slicks
Joined: Aug 2000
Posts: 2,425
Likes: 1,198
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
Burning Brakes
Joined: Oct 2019
Posts: 841
Likes: 526
From: Colorado Springs
Agreed. In chatting with a local speed shop rep here, he told me the ECUs have to be physically modified to be able to accept a tune. Could it be as simple as installing a jumper or snipping a wire? Probably.
So, I'll save my pennies, go for a flex fuel tune, then finish with some lowering springs and a set of good wheels.
So, I'll save my pennies, go for a flex fuel tune, then finish with some lowering springs and a set of good wheels.
