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: 2,390
Likes: 1,166
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: 2,390
Likes: 1,166
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: 7,099
From: Fulshear, TX
Burning Brakes
Joined: Oct 2019
Posts: 827
Likes: 522
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.
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Le Mans Master
Joined: Oct 2005
Posts: 5,038
Likes: 878
From: Tampa Florida
Melting Slicks
Joined: Mar 2005
Posts: 2,347
Likes: 224
From: Northeast FL
Intermediate
Joined: Jun 2024
Posts: 33
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: 2,390
Likes: 1,166
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
Burning Brakes
Joined: Oct 2019
Posts: 827
Likes: 522
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.
