When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Had James Short at ShorTuning perform his magic today. Prompt, professional, and spot on. All good things to say from me. I had been tuning myself and it was just never right. I reverted it back to stock and made the 3hour trip to see Shor. 5-6 hours later, and it drives better than ever. Highly recommended if you are anywhere remotely close to them!
Numbers dont look "impressive", but the tune is spot on. Dynos are a tool, so not sweating the numbers. Ran out of fuel at about E40, high side rail pressure not keeping up. It was low 90s, super humid, and the car was heat soaked on arrival. Typical conversion from Dyno Dynamics to Dyno jet is adding 12-14%. Stock C7 Z on this dyno is ~495rwhp.
Mods: Cordes 5", Soler LT5 throttle, Self ported blower, 15% lower, DSX low side, DSX Flex, 2" Kooks w/cats, FasterProms intercooler tank. NO meth. Blue line 93. Red line E40.
James is a cool guy. He has tuned two of my cars ( 08-C7 & 16-Z07 ). I have been on a lot of dynos (motorcycle & car) going back over 20 years. James is hands down the most responsive tuner I have dealt with. When he tuned my built Z07 he spent nearly the entire day on it and didn't finish until he was satisfied he had got all the reliable power he could.
Had James Short at ShorTuning perform his magic today. Prompt, professional, and spot on. All good things to say from me. I had been tuning myself and it was just never right. I reverted it back to stock and made the 3hour trip to see Shor. 5-6 hours later, and it drives better than ever. Highly recommended if you are anywhere remotely close to them!
Numbers dont look "impressive", but the tune is spot on. Dynos are a tool, so not sweating the numbers. Ran out of fuel at about E40, high side rail pressure not keeping up. It was low 90s, super humid, and the car was heat soaked on arrival. Typical conversion from Dyno Dynamics to Dyno jet is adding 12-14%. Stock C7 Z on this dyno is ~495rwhp.
Mods: Cordes 5", Soler LT5 throttle, Self ported blower, 15% lower, DSX low side, DSX Flex, 2" Kooks w/cats, FasterProms intercooler tank. NO meth. Blue line 93. Red line E40.
I've been trying to find a tuner who can do an E85 blend conversion. I do track days with my stock C7 Z06 and it heat soaks during summer events. I heard that using straight E85 doesn't work due to the limitations of the OEM fuel system but I thought maybe a blend of E85 and 93 octane might. I'd like to retune and relax all the temperature parameters that pull timing but use higher octane fuel to protect against detonation. Would prefer not to use straight 100 octane due to cost. It would be like the GM 100 octane tune but for later model C7 Z06's. Can you elaborate on what you did with your car that lets you run E40? Are you blending fuels and letting them mix in the tank or are you able to buy E40 at the pump up north. Thanks for any info.
Hey Mike. Step 1, you need to install a flex sensor. Several kits out there, I used DSX. Step 2, you need to program ECM to enable flex and tune for it.
I am mixing in the tank. I have a dash logic which will show e percentage and tank percentage on the dash. I then use an app called E85 blend (Android) to calculate how many gallons of 93 and e85 I need to keep the mixture correct. After filling, It takes under 5 min for it to slosh around enough to mix and get a consistent reading of the e mixture which is typically about 1 to 2 percent of what I was aiming for
Hey Mike. Step 1, you need to install a flex sensor. Several kits out there, I used DSX. Step 2, you need to program ECM to enable flex and tune for it.
I am mixing in the tank. I have a dash logic which will show e percentage and tank percentage on the dash. I then use an app called E85 blend (Android) to calculate how many gallons of 93 and e85 I need to keep the mixture correct. After filling, It takes under 5 min for it to slosh around enough to mix and get a consistent reading of the e mixture which is typically about 1 to 2 percent of what I was aiming for
Very cool. So it can be done. What octane equivalent would you say E40 is? Also, when you estimate how full the tank is (which is the most important variable it seems) do you just assume an indication of say 1/4 tank is 25% or do you try to account for reserve fuel, etc. I guess you could fill the tank at each quarter tank increment and see how much it takes to fine tune your % of tank estimates. Really good information. Any other things you've noticed running on the blend other than decrease of MPG? Did your tuner raise the temperature thresholds for when the OEM tune pulls timing? Thanks for the info!
E40 is likely around 96 octane if mixed with 93. It burns significantly cooler though, which the other bigger upside.
My dash logic shows fuel tank level in percentage, so no guessing on fuel levels
I would have to talk with Shor on how they tuned for it. My guess is you leave most of the heat modifier tables in tact, as they will also be used for 93. And then you just use the e85 spark scaler adder for e85.
So base map you get 20 degrees. E85 adds 7 degrees. Heat table removes 4 degrees, and you end up running 23.
E40 is likely around 96 octane if mixed with 93. It burns significantly cooler though, which the other bigger upside.
My dash logic shows fuel tank level in percentage, so no guessing on fuel levels
I would have to talk with Shor on how they tuned for it. My guess is you leave most of the heat modifier tables in tact, as they will also be used for 93. And then you just use the e85 spark scaler adder for e85.
So base map you get 20 degrees. E85 adds 7 degrees. Heat table removes 4 degrees, and you end up running 23.
All great information. I'm going to continue to look into it. Thanks!
E40 is likely around 96 octane if mixed with 93. It burns significantly cooler though, which the other bigger upside.
My dash logic shows fuel tank level in percentage, so no guessing on fuel levels
I would have to talk with Shor on how they tuned for it. My guess is you leave most of the heat modifier tables in tact, as they will also be used for 93. And then you just use the e85 spark scaler adder for e85.
So base map you get 20 degrees. E85 adds 7 degrees. Heat table removes 4 degrees, and you end up running 23.
So is the dash logic piece the DashControl OBDII Display Controller by Auto Meter? Just under $300 it seems. Do you just plug it into your OBDII port right before you refuel to determine what quantities of each fuel to mix and then unplug it? Or is it permanently attached to the OBDII port?
Correct, thats the unit. Originally made by Palmer Performance, but I believe they sold out the design to AutoMeter. It only works on 2014-2016 models, so if youre newer than that will need to do something else, HP tuners N gauge maybe.
I leave mine plugged into the OBD2 port all the time, but it can be removed simply by unplugging just like you would a scan tool. It basically hijacks the navigation section of the instrument cluster and displays information there. If you dont want to look at it, then all the other pages still work (speed, built in factory gauges etc)
ShorTuned!
