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Flex Fuel/ E85 issue??

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Old May 23, 2022 | 11:46 PM
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W205 C63s Coupe
Flex Fuel/ E85 issue??
I recently installed the Advanced Fuel Pro dynamics flex kit along with upgraded injectors in my w204. Switched to full e85 and got a custom tune by Eurocharged done on the dyno. I am running about 77% E and the car seems to pull hard. However I tested my 60-130 times and they're slower than what I originally had on 93. I went from an 8.6 second 60-130 to a 9.4. I'm really confused on how this is even possible because the car did put down way better numbers on E than it did on pump 93. Can someone help out?
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Old May 24, 2022 | 03:01 PM
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Originally Posted by Mean63AMG
I recently installed the Advanced Fuel Pro dynamics flex kit along with upgraded injectors in my w204. Switched to full e85 and got a custom tune by Eurocharged done on the dyno. I am running about 77% E and the car seems to pull hard. However I tested my 60-130 times and they're slower than what I originally had on 93. I went from an 8.6 second 60-130 to a 9.4. I'm really confused on how this is even possible because the car did put down way better numbers on E than it did on pump 93. Can someone help out?
I'd start with asking the people who tuned your vehicle and see what they say.

@loungn14 apparently works for Eurocharged so maybe he would be able to explain why you would be slower.
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Old May 25, 2022 | 06:56 AM
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Originally Posted by Mean63AMG
I recently installed the Advanced Fuel Pro dynamics flex kit along with upgraded injectors in my w204. Switched to full e85 and got a custom tune by Eurocharged done on the dyno. I am running about 77% E and the car seems to pull hard. However I tested my 60-130 times and they're slower than what I originally had on 93. I went from an 8.6 second 60-130 to a 9.4. I'm really confused on how this is even possible because the car did put down way better numbers on E than it did on pump 93. Can someone help out?
have you ran both 60-130 in the same location? same direction? was the 9.4 in a warmer more humidity weather?
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Old May 26, 2022 | 01:35 AM
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@loungn14 any thoughts??? I sent an email out to Jerry. He did a custom dyno tune for me. Still waiting on a response.
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Old May 26, 2022 | 01:37 AM
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Originally Posted by mthis
have you ran both 60-130 in the same location? same direction? was the 9.4 in a warmer more humidity weather?
I did the runs at the same exact location. Similar weather conditions. The car feels like its pulling harder. Im not sure why I'm getting slower times.
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Old May 26, 2022 | 06:59 AM
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Originally Posted by Mean63AMG
I did the runs at the same exact location. Similar weather conditions. The car feels like its pulling harder. Im not sure why I'm getting slower times.
If you have the handheld device load the file you did 8.6 on and see what it does then pull over load the newer file and see what it does .
how are u launching 2nd gear 3 rd gear at what mph are you srating your launch?
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Old May 27, 2022 | 07:19 PM
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Originally Posted by mthis
If you have the handheld device load the file you did 8.6 on and see what it does then pull over load the newer file and see what it does .
how are u launching 2nd gear 3 rd gear at what mph are you srating your launch?
I can't load the old file because I was tuned for stock injectors for that file and now I have larger injectors. I start 3rd gear around 55 mph.
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Old May 27, 2022 | 07:32 PM
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Originally Posted by Mean63AMG
I can't load the old file because I was tuned for stock injectors for that file and now I have larger injectors. I start 3rd gear around 55 mph.
replied to your email
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