Team ZR-1 Corvette Racers
Custom Tuning
>Enter Here
Test and Tune
Common Information
Rolex 2023 this weekend and next
by teamzr1. 01/25/23 06:19 PM
Cool Way to Get a Vehicle On Tow Truck
by teamzr1. 01/15/23 07:10 PM
C8.R Adds 3rd Driver for WEC Racing
by teamzr1. 01/14/23 01:26 PM
23 1LT Z06 Auctions for $275 Grand
by teamzr1. 01/14/23 12:49 PM
New Z06 GT3.R be seen at Daytona
by teamzr1. 01/10/23 08:09 PM
Running of IMSA 61st Rolex 24 At Daytona
by teamzr1. 01/05/23 08:33 AM
Dumb Asses ?
by teamzr1. 01/03/23 12:22 PM
Newer Corvettes
Fuel Injector Causing Several DTCs to Set
by teamzr1. 01/19/23 06:24 AM
Sold Prices of C8s at Mecum Auction 2023
by teamzr1. 01/16/23 11:27 AM
End of 2022 year C8 Build Counts
by teamzr1. 01/04/23 04:33 PM
Tech Talk
Clear Flood and Pre-oil Mode
by teamzr1. 01/16/23 09:38 AM
Pupose of O2 Sensors
by teamzr1. 01/13/23 06:39 PM
Must Properly align torque tube
by teamzr1. 01/11/23 07:48 PM
Forum Statistics
Forums27
Topics3,259
Posts5,734
Members48
Most Online265
Jan 21st, 2023
Previous Thread
Next Thread
Print Thread
Rate This Thread
#3295 - 02/18/10 06:45 PM Effects of using E10 Gasoline  
Joined: Dec 2000
Posts: 4,864
teamzr1 Offline
Owner - Pays the bills
teamzr1  Offline
Owner - Pays the bills
Lives in Engine Bay

Joined: Dec 2000
Posts: 4,864
America
We have posted in the past the ill effects of being forced to use E10 gas ( feds require E15 by mid year) for performance as it takes more volume of E10 to produce the same level of energy then straight gas.

Where straight gas at part throttle would require a 14.7:1 AFR due to E10 causing a leaner AFR for best performance the NON WOT engine conditions for EPA would require at the least the PCM tuned for a richer AFR of 14.2:1

We obtained straight 91 octane gas to compare it to other tests where E10 was used to see what the effects are

The PCM had been tuned for E10 so that the fuel trims which were at 8% too lean back to around zero

Leaving that tune in and using straight gas and the engine being 11.3:1 compression we see where the fuel trims were at zero with E10 that now with straight gas the average fuel trims are now -5% rich with a maximum of -11% too rich.

Notice WOT timing was at 29 degrees, zero knock and misfire.

Clearly gives a image that in using E10 your PCM would be running 5 to 10% too lean ( leaner in hot weather) which induces engine knock and lower timing to reduce HP and Tq

Since E15 will be required by EPA around mid year you can expect your engine to be running even leaner and less performance unless you tune the PCM to solve the issues of using ethanol


Attached Files allgas.jpgnoethanol.jpg

Team ZR-1
True Custom Performance Tuning
Teamzr1.com
Team ZR-1 Store
Enter Here
#3312 - 03/20/10 05:39 PM Re: Effects of using E10 Gasoline [Re: teamzr1]  
Joined: Dec 2000
Posts: 4,864
teamzr1 Offline
Owner - Pays the bills
teamzr1  Offline
Owner - Pays the bills
Lives in Engine Bay

Joined: Dec 2000
Posts: 4,864
America
Further testing of costs to using E10 gas.
Weather was 70 degrees.


WOT at 150 MPH



Mixed speeds


Attached Files rebel2.jpgrebel3.jpgmixedspeed.jpgWOT70deg.jpgcruise2.jpg

Team ZR-1
True Custom Performance Tuning
Teamzr1.com
#3313 - 03/20/10 07:01 PM Re: Effects of using E10 Gasoline [Re: teamzr1]  
Joined: Dec 2000
Posts: 4,864
teamzr1 Offline
Owner - Pays the bills
teamzr1  Offline
Owner - Pays the bills
Lives in Engine Bay

Joined: Dec 2000
Posts: 4,864
America
This is the test results of the captured scanner data.

As seen it made no different in the slower cruise part throttle run or the run with more WOT/higher speeds that a stock tune from GM is not adjusted for E10 ethanol and would cause engine to run 10% too lean
( worse with E15 coming out soon) and when PCM is tuned for E10 where the LTFT stay around a perfect zero that when normal gas with no ethanol is used then LTFTs will be about 10% too rich.

This shows the ethanol and the more percentage is used that your engine will run way too lean, have more engine knock, less timing, less fuel mileage and less performance

If finding straight gas and your PCM was tuned for E10 then engine will be about -10% too rich and will need retuning for either cases.

As to our custom NFW exhaust design ( review other thread about design and testing) with weather at 70 degrees at idle with windows up the exhaust sound measured between 78-84 Dba and car in motion measured between 84-90 Dba

Attached Files noethanol.jpgnoethwot.jpgnoeth.jpg

Team ZR-1
True Custom Performance Tuning
Teamzr1.com
#3331 - 04/10/10 01:25 PM Re: Effects of using E10 Gasoline [Re: teamzr1]  
Joined: Dec 2000
Posts: 4,864
teamzr1 Offline
Owner - Pays the bills
teamzr1  Offline
Owner - Pays the bills
Lives in Engine Bay

Joined: Dec 2000
Posts: 4,864
America
Read more about the coming of E15 at

E15 gas mandate


Team ZR-1
True Custom Performance Tuning
Teamzr1.com

Moderated by  teamzr1 

Who's Online Now
0 registered members (), 6 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
What's New
Talking Techie on E Ray
by teamzr1. 01/22/23 06:26 PM
Dealers Already Jacking up E Ray selling prices
by teamzr1. 01/19/23 01:29 PM
Fuel Injector Causing Several DTCs to Set
by teamzr1. 01/19/23 06:24 AM
Rolex 2023 this weekend and next
by teamzr1. 01/18/23 09:10 AM
What the E Ray is all about
by teamzr1. 01/17/23 07:50 AM
Sold Prices of C8s at Mecum Auction 2023
by teamzr1. 01/16/23 11:27 AM
Clear Flood and Pre-oil Mode
by teamzr1. 01/16/23 09:38 AM
Popular Topics(Views)
Techie
Fuel Injector Causing Several DTCs to Set
by teamzr1. 01/19/23 06:24 AM
Sold Prices of C8s at Mecum Auction 2023
by teamzr1. 01/16/23 11:27 AM
Clear Flood and Pre-oil Mode
by teamzr1. 01/16/23 09:38 AM
Pupose of O2 Sensors
by teamzr1. 01/13/23 06:39 PM
Must Properly align torque tube
by teamzr1. 01/11/23 07:48 PM
Powered by UBB.threads™ PHP Forum Software 7.6.0