Re-tune coming up - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

RupertPupkin · 02-26-2021, 02:33 PM

So I have my re-tune coming up on March 7th. I already have a flex tune etc etc etc. The shop said to bring in the car with e85 in the tank. From my understating, I thought I was suppose to bring in the car with 93, tune it, and then retune with e85.

Just trying to wrap my head around it.

dreksnot · 02-26-2021, 03:15 PM

Do you know how they plan to tune the car? Some tuners will just tune for E85, and expect you to run E85. That just takes adjusting the main octane timing table and that's about it (along with fueling adjustments to run at the set lambda/afr). Then there's the true flex fuel tuning that has the tuner making the optimal 93 timing/fueling, then replacing the tank with E85. There is a separate flex fuel timing table (it's an adder adjustment table to/for the main timing table). And, a few other table that would need adjusting to ensure a true flex fuel tune, like in-between blends of 93/E85 (ratios). Might ask them their strategy. They might have assume the 93 tables are spot on and just need to do the flex fuel part of the tune.

RupertPupkin · 02-26-2021, 10:42 PM

Quote:

Originally Posted by dreksnot

Do you know how they plan to tune the car? Some tuners will just tune for E85, and expect you to run E85. That just takes adjusting the main octane timing table and that's about it (along with fueling adjustments to run at the set lambda/afr). Then there's the true flex fuel tuning that has the tuner making the optimal 93 timing/fueling, then replacing the tank with E85. There is a separate flex fuel timing table (it's an adder adjustment table to/for the main timing table). And, a few other table that would need adjusting to ensure a true flex fuel tune, like in-between blends of 93/E85 (ratios). Might ask them their strategy. They might have assume the 93 tables are spot on and just need to do the flex fuel part of the tune.

From what they said they’re starting from the ground up. I just find it odd, that they would tell me to bring it in with as much e85 in it. Maybe work backwards. Idk.

TheFlyingBananaSS · 03-01-2021, 11:02 AM

Sounds odd. I was told to bring mine with 93 maybe an 1/8 of a tank and 10 gallons of E85 for after the 93 was done.

Bigdumogre · 03-01-2021, 12:09 PM

Quote:

Originally Posted by TheFlyingBananaSS

Sounds odd. I was told to bring mine with 93 maybe an 1/8 of a tank and 10 gallons of E85 for after the 93 was done.

This is what I would do ^^ just bring it in with less than a 1/4 and some gallons of E85 from the place you will be getting yours from and let them tune before driving it on E85

dreksnot · 03-01-2021, 02:54 PM

Are you sure they're doing a flex fuel tune versus a dedicated E85 tune? FF tune would be running anything from 100% 93 to 85% E85, and every blended ratio in-between. A dedicated E85 would be just that - you can only run E85 (with the advanced timing setup).

RupertPupkin · 03-01-2021, 04:01 PM

Quote:

Originally Posted by dreksnot

Are you sure they're doing a flex fuel tune versus a dedicated E85 tune? FF tune would be running anything from 100% 93 to 85% E85, and every blended ratio in-between. A dedicated E85 would be just that - you can only run E85 (with the advanced timing setup).

Yeah.... 100% Flex fuel tune. Just re-read my emails, unless im dyslexic.

Badbubba · 03-02-2021, 07:02 AM

Yeah, under 1/4 tank of 93, then the ethanol tune. I could maybe understand their logic if you were just adding a flex fuel sensor to run E85. Use your existing tune for 93 and just tune for E85. Provided there were no other changes such as injectors. What's the reason for the re-tune? Just an issue with the ethonal tune? Since it can range from e51 to e85. I've always had the double tune. But other modifications were made. I would ask them why? Possibly a wrong statement in the email. Would sort of waste tune day.

RupertPupkin · 03-02-2021, 07:22 AM

Quote:

Originally Posted by Badbubba

Yeah, under 1/4 tank of 93, then the ethanol tune. I could maybe understand their logic if you were just adding a flex fuel sensor to run E85. Use your existing tune for 93 and just tune for E85. Provided there were no other changes such as injectors. What's the reason for the re-tune? Just an issue with the ethonal tune? Since it can range from e51 to e85. I've always had the double tune. But other modifications were made. I would ask them why? Possibly a wrong statement in the email. Would sort of waste tune day.

Starting from ground up. Tune was shit from the get go. Hot starts al the time regardless if I run 93/mix/ full e85. Also when I did wide open throttles, it would break up bad up top (not belt slip since I got new belt, and adjusted tensioner)

Specifically asked for a flex tune via email, so no confusion on that part.

RupertPupkin · 03-02-2021, 11:54 AM

Got email back, and it is a flex tune. Shop did say to bring in the car with 93 and e85 in it during tune.

Still doesn’t sound right to me. Like drek said, it seems like it’s not getting the optimal timing table for 93 and e85.

TheFlyingBananaSS · 03-02-2021, 11:58 AM

Not at all. So they want you to bring it in with both in the tank? How do they expect to dial in these parameters correctly? I dunno but their communication skills leave me scratching my head.

RupertPupkin · 03-02-2021, 12:11 PM

Quote:

Originally Posted by TheFlyingBananaSS

Not at all. So they want you to bring it in with both in the tank? How do they expect to dial in these parameters correctly? I dunno but their communication skills leave me scratching my head.

Yup both in the tank when I drop it off. Here’s the response..

“That the beauty of flex fuel and it really does not matter the mix. Yes you would make the most power with 100% E85 but for tuning the car we can deal with a mix. If you desire true 93 vs E85 dyno graphs, then the car would need to arrive on 100% 93 to start. Then we would have to drain that out of the tank and put E85 in to make a final dyno run. There are associated labor charges for that process. It can be done but it only gets you numbers on a piece of paper. Just depends on how much that piece of paper is worth to you I guess.”

TheFlyingBananaSS · 03-02-2021, 12:15 PM

So basically he's too lazy to do it the right way unless you pay extra? Tank doesn't not need to be drained either. As long as it's near empty, you can dump in 10 gallons of 85 and roll that for the tune. The top shops in the country do it this way.

RupertPupkin · 03-02-2021, 12:18 PM

I was thinking of just rolling in with the 93, tune that, and then add in the flex fuel. I have 2 5 gallon canisters that I can put in e85.

02-26-2021, 02:33 PM	#1
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,596	Re-tune coming up So I have my re-tune coming up on March 7th. I already have a flex tune etc etc etc. The shop said to bring in the car with e85 in the tank. From my understating, I thought I was suppose to bring in the car with 93, tune it, and then retune with e85. Just trying to wrap my head around it. __________________ 2014 SS 1LE Money Pit/ Forged 402 CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq

02-26-2021, 03:15 PM	#2
dreksnot Served USN - Atomic Chimp Drives: 13 Camaro LSX434 TT M6, 21 ZLE A10 Join Date: Jul 2012 Location: Fort Collins, CO Posts: 1,603 View My Garage	Do you know how they plan to tune the car? Some tuners will just tune for E85, and expect you to run E85. That just takes adjusting the main octane timing table and that's about it (along with fueling adjustments to run at the set lambda/afr). Then there's the true flex fuel tuning that has the tuner making the optimal 93 timing/fueling, then replacing the tank with E85. There is a separate flex fuel timing table (it's an adder adjustment table to/for the main timing table). And, a few other table that would need adjusting to ensure a true flex fuel tune, like in-between blends of 93/E85 (ratios). Might ask them their strategy. They might have assume the 93 tables are spot on and just need to do the flex fuel part of the tune. __________________ In excess of 1,000WHP LSX434 \| AGP 65/65 TT \| BTR Equalizer Intake \| Trickflow 245cc cathedral \| BTR custom cam \| Cortex EBC \| n2mb WOT \| ID-1700x \| Brisk GR12S \| RPM Lv 7 TR6060 \| AGP's Triple 525LPH Fore Fuel \| Monster LT1-S Triple \| 4.11 DSS Proform 9", CF driveshaft, 1400hp axles \| Hurst Line Lock \| MGW Retro Short Throw w/old skool Hurst T-handle \| ADM solid subframe mounts \| Prothane Motor Mounts \| Revshift Poly Trans insert \| Moreno camber/caster plates

03-01-2021, 11:02 AM	#4
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	Sounds odd. I was told to bring mine with 93 maybe an 1/8 of a tank and 10 gallons of E85 for after the 93 was done. __________________ GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.

03-01-2021, 02:54 PM	#6
dreksnot Served USN - Atomic Chimp Drives: 13 Camaro LSX434 TT M6, 21 ZLE A10 Join Date: Jul 2012 Location: Fort Collins, CO Posts: 1,603 View My Garage	Are you sure they're doing a flex fuel tune versus a dedicated E85 tune? FF tune would be running anything from 100% 93 to 85% E85, and every blended ratio in-between. A dedicated E85 would be just that - you can only run E85 (with the advanced timing setup). __________________ In excess of 1,000WHP LSX434 \| AGP 65/65 TT \| BTR Equalizer Intake \| Trickflow 245cc cathedral \| BTR custom cam \| Cortex EBC \| n2mb WOT \| ID-1700x \| Brisk GR12S \| RPM Lv 7 TR6060 \| AGP's Triple 525LPH Fore Fuel \| Monster LT1-S Triple \| 4.11 DSS Proform 9", CF driveshaft, 1400hp axles \| Hurst Line Lock \| MGW Retro Short Throw w/old skool Hurst T-handle \| ADM solid subframe mounts \| Prothane Motor Mounts \| Revshift Poly Trans insert \| Moreno camber/caster plates

03-02-2021, 07:02 AM	#8
Badbubba GrINned & JUICEd Drives: 15STI, 10Expy, 10 2SS/RS M6, 47KB1 Join Date: Nov 2009 Location: Pittsburgh, PA Posts: 1,247	Yeah, under 1/4 tank of 93, then the ethanol tune. I could maybe understand their logic if you were just adding a flex fuel sensor to run E85. Use your existing tune for 93 and just tune for E85. Provided there were no other changes such as injectors. What's the reason for the re-tune? Just an issue with the ethonal tune? Since it can range from e51 to e85. I've always had the double tune. But other modifications were made. I would ask them why? Possibly a wrong statement in the email. Would sort of waste tune day. __________________ GPI SS3 Cam & stuff,N.O. Plate(dedicated fuel tank,progressive,fuel hose upgrade,remote opener,heater,console switches),LNC2000,CTAP,ARH 1 7/8" LTs/gutted cats/X pipe/mufflers,Jet Hot coated LTs,GPI HPT Tune,CAI, Scoop,Rx Catch Can,Gates heater hose relocation, Remote clutch & auto brake res,Metco loop,Momentum Tunnel Brace,TSW Nurb 18",555 & 05,Pfadt trailing arms & toe rods,Autometer WB,Fesler Pillar Pod,LED strips (int),Lloyds floor & trunk mats,LED DRL/front turn & license plate,DRL harness,VLEDs tail lights,Plasticoat Bowties. Ord: Oct 5, 2009 Rec: Nov 19, 2009 13.17@112.6 stock

03-02-2021, 11:54 AM	#10
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,596	Got email back, and it is a flex tune. Shop did say to bring in the car with 93 and e85 in it during tune. Still doesn’t sound right to me. Like drek said, it seems like it’s not getting the optimal timing table for 93 and e85. __________________ 2014 SS 1LE Money Pit/ Forged 402 CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq

03-02-2021, 11:58 AM	#11
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	Not at all. So they want you to bring it in with both in the tank? How do they expect to dial in these parameters correctly? I dunno but their communication skills leave me scratching my head. __________________ GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.

03-02-2021, 12:15 PM	#13
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	So basically he's too lazy to do it the right way unless you pay extra? Tank doesn't not need to be drained either. As long as it's near empty, you can dump in 10 gallons of 85 and roll that for the tune. The top shops in the country do it this way. __________________ GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.

03-02-2021, 12:18 PM	#14
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,596	I was thinking of just rolling in with the 93, tune that, and then add in the flex fuel. I have 2 5 gallon canisters that I can put in e85. __________________ 2014 SS 1LE Money Pit/ Forged 402 CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq