Flex fuel tune ... Cranking

Baddawg53 · 10-11-2018, 10:19 AM

After my flex fuel install, the car starts just a little bit harder when it's cold. The timing table alcohol adder is all zero's. Rather than randomly trying numbers, I figured I'd ask. Is the cranking adder more than just a couple of degrees typically?

KingLT1 · 10-11-2018, 10:49 AM

yes... from -40 to 90 degrees you need to add timing from 30-100% E content. 7 degrees -40/30%, 12 degrees -40/100%. 1 degree 90/30%, 6 degrees 90/100%. Populate everything in between linearly.

Baddawg53 · 10-11-2018, 11:09 AM

Thanks for the help, I couldn't find that information anywhere.

lokitwitch04 · 10-11-2018, 11:32 AM

0 7 8 9 10 11 12 12 12
0 6 7 8 9 10 11 11 11
0 5 6 7 8 9 10 10 10
0 4 5 6 7 8 9 9 9
0 3 4 5 6 7 8 8 8
0 2 3 4 5 6 7 7 7
0 1 2 3 4 5 6 6 6
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0

This is what my alcohol adder table is at for cranking.

edit: it made the numbers weird, but that's the whole table.

Baddawg53 · 10-11-2018, 11:52 AM

Quote:

Originally Posted by lokitwitch04

0 7 8 9 10 11 12 12 12
0 6 7 8 9 10 11 11 11
0 5 6 7 8 9 10 10 10
0 4 5 6 7 8 9 9 9
0 3 4 5 6 7 8 8 8
0 2 3 4 5 6 7 7 7
0 1 2 3 4 5 6 6 6

This is what my alcohol adder table is at for cranking.

edit: it made the numbers weird, but that's the whole table.

So I'm assuming the last 3 in each column repeat because you're never going to be over 85%. I wouldn't have done it that way but it makes sense now.

TJay74 · 10-20-2018, 12:31 PM

I put these in my truck this morning, should be able to see later if it helps out or not.

10-11-2018, 10:19 AM	#1
Baddawg53 Drives: 17 hyper blue 2SS M6 Join Date: Mar 2018 Location: NorCal Posts: 759	Flex fuel tune ... Cranking After my flex fuel install, the car starts just a little bit harder when it's cold. The timing table alcohol adder is all zero's. Rather than randomly trying numbers, I figured I'd ask. Is the cranking adder more than just a couple of degrees typically?

10-11-2018, 10:49 AM	#2
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,666	yes... from -40 to 90 degrees you need to add timing from 30-100% E content. 7 degrees -40/30%, 12 degrees -40/100%. 1 degree 90/30%, 6 degrees 90/100%. Populate everything in between linearly. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

10-20-2018, 12:31 PM	#6
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	I put these in my truck this morning, should be able to see later if it helps out or not. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

10-11-2018, 11:09 AM	#3
Baddawg53 Drives: 17 hyper blue 2SS M6 Join Date: Mar 2018 Location: NorCal Posts: 759	Thanks for the help, I couldn't find that information anywhere.

10-11-2018, 11:32 AM	#4
lokitwitch04 Drives: 2017 Camaro SS 2SS Join Date: Jun 2017 Location: Hamilton, MI Posts: 191	0 7 8 9 10 11 12 12 12 0 6 7 8 9 10 11 11 11 0 5 6 7 8 9 10 10 10 0 4 5 6 7 8 9 9 9 0 3 4 5 6 7 8 8 8 0 2 3 4 5 6 7 7 7 0 1 2 3 4 5 6 6 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 This is what my alcohol adder table is at for cranking. edit: it made the numbers weird, but that's the whole table.

User Name		Remember Me?
Password