L99 Highway milage with DOD delete... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

rdsesq · 01-06-2018, 12:15 PM

Anybody with an L99 disabled the DOD and if so, how did it effect highway mileage?

Considering getting a tune to go with the CAI/Exhaust (and maybe ported throttlebody)

Jannetty Racing was mentioning that most L99 trans tunes just disable the DOD. I get pretty good highway mileage (25-26mph) long highway trips (LA to SF or LA - Phoenix) Avg speed around 70-75.
(I was quite impressed for a 6.2L V8.)
If I have the DOD disabled, any idea what type of drop (if any) in highway mileage I'll be looking at?

Not a huge factor in my decision, but just looking into all the factors.

Strider044 · 01-06-2018, 12:37 PM

2015 L99 at 70mph will get like 24-25 dod delete

at like 55mph I will see 27

but my lifetime is like 18mpg since tune

hammdo · 01-06-2018, 01:12 PM

I cammed, LSA Supercharged and heads still got 20 on the highway with AFM/DOD delete..

Sold the L99 and sporting a GPI Forged LSA 416 stroker E85 now...

-Don

pyroguy · 01-06-2018, 01:59 PM

I still have AFM enabled post tune for the chance of better mileage (car doesn't drone and AFM isn't very noticeable when you can notice it). I got 23.5 mpg on my last road trip which consisted of PA, MD, WV, VA, NC, and TN mountains a Camaro gathering with plenty of stupid driving (engine revving, hard launching, tire noise, etc.), and then in town driving while around the area. I have a cold air intake, ported throttle body, long tube headers with cats, catback exhaust, and a tune. As long as you have an exhaust that doesn't drone, contrary to what others will say, you can have a good exhaust tone, minimal if any AFM noise, AND a good sounding exhaust.

TheFlyingBananaSS · 01-06-2018, 02:57 PM

Dammmmm I'm only getting 13. I guess I have a lead foot

qcman · 01-06-2018, 05:42 PM

On the highway I would say I lost maybe 1-2 miles per gallon after tuning but it got a fair bit better around town where it actually gets driven. No regrets on MPG at all. Besides the engaging and disengaging of the AFM is hard on the motor compared to running in V8 all the time according to Jertm on here....

KansasSS · 01-06-2018, 06:22 PM

I'm tuned and my L99 gets around 15mpg with the DoD delete plus I'm running 2in stainless works long tube.

CamaroJim56 · 01-06-2018, 06:41 PM

You probably will lose 1-2. I have the Range device and have driven long drives with and without the Range device.

Low Saturn · 01-07-2018, 05:59 PM

Quote:

Originally Posted by rdsesq

Anybody with an L99 disabled the DOD and if so, how did it effect highway mileage?

I gained .1 to .3 miles per gallon with my normal commute, a little more on longer road trips.

Strider044 · 01-08-2018, 09:11 AM

If you want more performance you will lose MPG, there is really no way around it. You have to find was the best for your car and your budget. If you want 30 mpg get a camry but if you are ok with losing a little bit of mpg for more response, throttle control and better more constant v8 sound then do the DOD delete. :-)

I go about 250-300 miles per tank before I fill up and I can live with that

SSEssence · 01-08-2018, 09:22 AM

I drive in a lot of traffic but averaging around 17 mpg after tune but I'm also catless

Pace · 01-09-2018, 11:35 AM

City/Highway with DOD = 18.3mpg. Tuned out after 6 months (been 7 years now) = 18.1mpg.

Rock-It Man · 01-09-2018, 12:54 PM

I have never disabled AFM, but I notice that the engine stays in 8 cyl. mode at speeds over about 75.

I see no point in disabling AFM unless you are making valve train changes.

rdsesq · 01-11-2018, 12:22 PM

In the ideal world I'd like ti be able to disable DOD/AFM when I'm in M mode and not in D mode. Talked to Jannetty Racing about doing a trans tune along with an engine tune, and they said that basically best idea with a tune is to disable DOD/AFM regardless. Not overly concerned about highway mileage. (My city mileage sucks as I have a lead foot, especially coming off red lights) I was just surprised at the good mileage I got on long highway trips, and wondered if I would see big drop if the DOD/AFM was disabled. It seems not. Like I saind, not a huge factor in my decision, but just looking into all the factors.

FWIW regarding AFM drone, I have a Corsa catback and no AFM drone. (Love that exhaust and highly recommend it for anybody with an AT V8. Not to loud around town or on the highway, but put your foot and hear it roar.)

Thanks for the real world data folks. Appreciated.

01-06-2018, 12:15 PM	#1
rdsesq Drives: 2013 Rally Yellow SS/RS Join Date: Jul 2013 Location: Cali Posts: 60 View My Garage	L99 Highway milage with DOD delete... Anybody with an L99 disabled the DOD and if so, how did it effect highway mileage? Considering getting a tune to go with the CAI/Exhaust (and maybe ported throttlebody) Jannetty Racing was mentioning that most L99 trans tunes just disable the DOD. I get pretty good highway mileage (25-26mph) long highway trips (LA to SF or LA - Phoenix) Avg speed around 70-75. (I was quite impressed for a 6.2L V8.) If I have the DOD disabled, any idea what type of drop (if any) in highway mileage I'll be looking at? Not a huge factor in my decision, but just looking into all the factors.

01-06-2018, 12:37 PM	#2
Strider044 Drives: 2015 2ss/rs Commemorative edition Join Date: Oct 2011 Location: Winter Garden, Fl (Orlando) Posts: 423	2015 L99 at 70mph will get like 24-25 dod delete at like 55mph I will see 27 but my lifetime is like 18mpg since tune __________________ 2015 2ss/rs Commemorative Edition - DynoSteve Tune, NPP, Hotchkis sport springs 19110, Zl1/1LE rear swaybar, VR-DRX CAI, VaraRam VRX-93, Z28 spoiler

01-06-2018, 01:12 PM	#3
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,694 View My Garage	I cammed, LSA Supercharged and heads still got 20 on the highway with AFM/DOD delete.. Sold the L99 and sporting a GPI Forged LSA 416 stroker E85 now... -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577

01-06-2018, 01:59 PM	#4
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,918 View My Garage	I still have AFM enabled post tune for the chance of better mileage (car doesn't drone and AFM isn't very noticeable when you can notice it). I got 23.5 mpg on my last road trip which consisted of PA, MD, WV, VA, NC, and TN mountains a Camaro gathering with plenty of stupid driving (engine revving, hard launching, tire noise, etc.), and then in town driving while around the area. I have a cold air intake, ported throttle body, long tube headers with cats, catback exhaust, and a tune. As long as you have an exhaust that doesn't drone, contrary to what others will say, you can have a good exhaust tone, minimal if any AFM noise, AND a good sounding exhaust. __________________ '10 Camaro 2SS/RS \| Aqua Blue #831 of 3,903 \| Silver Stripes Check out my build thread

01-06-2018, 02:57 PM	#5
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	Dammmmm I'm only getting 13. I guess I have a lead foot __________________ 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.

01-06-2018, 05:42 PM	#6
qcman Drives: 2013 Camaro 2SS RDP Tuned L99 Join Date: Apr 2013 Location: Ottawa, Canada eh? Posts: 1,889	On the highway I would say I lost maybe 1-2 miles per gallon after tuning but it got a fair bit better around town where it actually gets driven. No regrets on MPG at all. Besides the engaging and disengaging of the AFM is hard on the motor compared to running in V8 all the time according to Jertm on here....

01-06-2018, 06:22 PM	#7
KansasSS Drives: 2011 Black 2SS Non RS L99 Auto Join Date: Jul 2016 Location: Wichita KS Posts: 125	I'm tuned and my L99 gets around 15mpg with the DoD delete plus I'm running 2in stainless works long tube.

01-06-2018, 06:41 PM	#8
CamaroJim56 Obsessed Drives: 2016 Hyper Blue 2SS RS Join Date: Jun 2011 Location: Riverview, FL Posts: 2,603	You probably will lose 1-2. I have the Range device and have driven long drives with and without the Range device. __________________ 2016 Hyper Blue 2SS

01-08-2018, 09:11 AM	#10
Strider044 Drives: 2015 2ss/rs Commemorative edition Join Date: Oct 2011 Location: Winter Garden, Fl (Orlando) Posts: 423	If you want more performance you will lose MPG, there is really no way around it. You have to find was the best for your car and your budget. If you want 30 mpg get a camry but if you are ok with losing a little bit of mpg for more response, throttle control and better more constant v8 sound then do the DOD delete. :-) I go about 250-300 miles per tank before I fill up and I can live with that __________________ 2015 2ss/rs Commemorative Edition - DynoSteve Tune, NPP, Hotchkis sport springs 19110, Zl1/1LE rear swaybar, VR-DRX CAI, VaraRam VRX-93, Z28 spoiler

01-08-2018, 09:22 AM	#11
SSEssence Instagram: Sangstah Drives: 2019 Camaro 1LE Join Date: Sep 2016 Location: Buena Park, CA. Posts: 2,802 View My Garage	I drive in a lot of traffic but averaging around 17 mpg after tune but I'm also catless __________________ 2019 SS 1LE - "CaSSandra" 2014 SS - "AleSSandra - Sold" 94 Z28 - Sold Follow the build https://www.camaro6.com/forums/showthread.php?t=612717

01-09-2018, 11:35 AM	#12
Pace Lifestyle = Deathstyle Drives: 11 SIM 2SS/RS Join Date: Mar 2010 Location: Long Island, NY Posts: 686	City/Highway with DOD = 18.3mpg. Tuned out after 6 months (been 7 years now) = 18.1mpg. __________________ 11 2SS/RS

01-09-2018, 12:54 PM	#13
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,031 View My Garage	I have never disabled AFM, but I notice that the engine stays in 8 cyl. mode at speeds over about 75. I see no point in disabling AFM unless you are making valve train changes.

01-11-2018, 12:22 PM	#14
rdsesq Drives: 2013 Rally Yellow SS/RS Join Date: Jul 2013 Location: Cali Posts: 60 View My Garage	In the ideal world I'd like ti be able to disable DOD/AFM when I'm in M mode and not in D mode. Talked to Jannetty Racing about doing a trans tune along with an engine tune, and they said that basically best idea with a tune is to disable DOD/AFM regardless. Not overly concerned about highway mileage. (My city mileage sucks as I have a lead foot, especially coming off red lights) I was just surprised at the good mileage I got on long highway trips, and wondered if I would see big drop if the DOD/AFM was disabled. It seems not. Like I saind, not a huge factor in my decision, but just looking into all the factors. FWIW regarding AFM drone, I have a Corsa catback and no AFM drone. (Love that exhaust and highly recommend it for anybody with an AT V8. Not to loud around town or on the highway, but put your foot and hear it roar.) Thanks for the real world data folks. Appreciated.