HOLLEY EFI AND FLEX FUEL

A in depth look at how i do flex fuel with Holley Efi

[@whyamihereg]

Another great insight to more stuff I’ll mess with.

[@boostedmopar1]

I screenshot everything for loading into my ECU. My combo is exactly like yours except it’s a hemi with 76s in a 4000# car, should work out great! Just a little humor for your Wednesday... 😂

[@theholleyefiguy]

LOL

[@ryanbaker9090]

Solid info, thank you 🙏🏼

[@davidburke6785]

Also runs cooler on E85. Thanks Devin!

[@jasonbrinegar6759]

Gee thanks Devin, now I want to add flex to my already over budget behind schedule build for 24. 🙃

[@CLEEPER1]

I done it on my ls3 and what I'm finding is on e my cruise and idle is now pulling a ton of fuel where it was pretty dialed on 93. Was staying -1 to -3% Now -20 to 25% but wot is still dialed

[@GunniGST]

At 6:33 , your math is off there, it adds 20% to the currently read value, so 120% of 36 is 43.2, ie 1.2 * 36, it´s not 36% + 20% = 56%

[@andrewhiestand4917]

Would it be possible to do the same thing, only in reverse? I have my car dialed in on E85. Around my area it’s readily available. On Sick Summer last year we had trouble locating it a couple of times (in Iowa of all places….. and the ethanol content was crap) it would have been convenient to put 93 just to get to the next track.

[@calhayward7921]

Haven’t had good luck with Holley and Flex fuel

[@tylertincher]

Why use VE offset instead of fuel flow multiplier? Using a fuel flow multiplier will add to the cranking fuel and the acceleration enrichment values.

[@MrRPF66]

He probably has a long answer to why but the easy answer is because Devin told me to

[@v8tergt653]

Wondering what’s the thought behind offsetting the Ve table and also the target af?

[@hectorgomez502]

E85 usually likes richer targets at WOT so if you have an 11.5ish target for gas, youll want to offset that down in to the 10s for e85. You cant just add extra fuel to the table alone because closed loop will try to force it back to the gas target if not offset.

[@v8tergt653]

@@hectorgomez502 Appreciate the explanation, makes way more sense now.

[@v8tergt653]

@@hectorgomez502 So to not complicate things, the sensor reads in lambda, thats why even if you leave the same target af the Ve table needs to be adjusted so the E85 will get to set target af since its stoich is way lower than gas.

[@hectorgomez502]

@@v8tergt653 correct, sorry for the late reply.

[@ericmiller4285]

36% VE plus 20% does not equal 56% VE.... its 43.2.

[@JobSpetter]

Why would you multiply the VE table by any amount? Changing the type of fuel used doesn't change cylinder filling (outside of a small percentage due to charge cooling), so the VE shouldn't change at all. Why wouldn't you just have the flex sensor change the stoich value of the fuel to what is currently being reported by the sensor? Then all the fueling math would work out without having VE numbers that aren't real.

[@theholleyefiguy]

Cause in holley software you cant offset the stoich value in an advanced table, so you need to offset ve. the only place the youll see wrong ve values will be in a log not on the fueling table. hence the reason i said to dial it in on 93

[@JobSpetter]

Got it... 👍@@theholleyefiguy