LLT tune for 100/110 octane?? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2011Camaro · 06-29-2012, 12:21 AM

So I have been bouncing the idea around in my head wondering if anyone has ever tried tuning the LLT for 100 or 110 octane? With our compression ratios and ability to run serious timing I would think it may offer some gains. Anyone have any knowledge as to if it has been tried and if not is there any reason it would potentially not work?

RogerBzSS · 06-29-2012, 05:09 AM

Iwould think this is a wasted effort and $$$$ with tuning an engine for using that hi of an octane rating it does not need

My
$0.02

Roger

Sent from my DROID X2 using Tapatalk 2

GretchenGotGrowl · 06-29-2012, 08:21 AM

There is an E85 tune available already. It provides a pretty good bump in power and is cheaper than race gas. You might want to look around to see if it is available in your area.

SC2150 · 06-29-2012, 08:58 AM

The DI LLT & LFX certainly will show more power if tuned for higher octain unlike the lower compression LS3/L99. At 11.3-1 CR there is room to use a higher octain fuel...E85 or unleaded race gas. Not economical at all, but the beauty of these DI motors is they can run fine on 87, run better on 93, and room for E85/race gas. Any 9/10-1 will not...it would be a waste.

We run 14-1 CR on our race motors with methanol or 116 race fuel.

The ECU will detect the knock and pull timing efficiently so thats why 87 is acceptable due to the efficiency of the Direct Injection. On a port injection this is not possible.

2011Camaro · 06-29-2012, 01:28 PM

All good info and feedback, I should have started out by saying I realize that race gas is on the high $$ side, but it wouldn't be something I would run daily, just for the weekend play days at the track.

hapisok · 07-07-2012, 01:56 PM

gretchen is right. i saw a HUGE bump in my TQ and overall HP on E85. if you have it locally then it would be the best route to go IMO. logged over 3,000 mi's with no issues when i was running it. plus there are a lot of benefits from E85 vs 100-110 race fuel. as mentioned, 1. price 2. advance in timing 3. runs cooler (less likely to melt a piston) 4. smells awesome! the only down side i found was availability but it if is an option it is DEFINITELY worth looking into.

DocT · 07-09-2012, 09:33 AM

Strong downside is the corrosiveness of E85. It will eat up your soft parts....not worth IMO. Go for the hi-octane fuel - if available in your state, instead.

06-29-2012, 12:21 AM	#1
2011Camaro Drives: 2011 Camaro LS IBM M6 Join Date: Jul 2010 Location: Knoxville,TN/San Deigo,CA Posts: 600	LLT tune for 100/110 octane?? So I have been bouncing the idea around in my head wondering if anyone has ever tried tuning the LLT for 100 or 110 octane? With our compression ratios and ability to run serious timing I would think it may offer some gains. Anyone have any knowledge as to if it has been tried and if not is there any reason it would potentially not work? __________________ 2011 IBM M6 Built 06/17/2010 Injen CAI,Black Ice-olator, Barton shifter, BBK LT's, DSS aluminum driveshaft, VMAX TB, RX Intake Manifold/Catch-can/Breather, Corsa catback, 18" MSR 045's, Nitto NT555's, Trifecta Tuning. Best ET so far in the 1/8th 9.301 Born on the Island and raised in the sand. Semper Fidelis

06-29-2012, 05:09 AM	#2
RogerBzSS Drives: 11 IBM n White 2SS/RS M6 Join Date: May 2011 Location: Tewksbury Ma Posts: 330 View My Garage	Iwould think this is a wasted effort and $$$$ with tuning an engine for using that hi of an octane rating it does not need My $0.02 Roger Sent from my DROID X2 using Tapatalk 2 __________________ Black CIA -Powder Coated Red Air Scoop - Vmax Ported Throttle Body - Ceramic Coated Dynatek Headers - High Flow Cats out thru factory Cat Back - JRE rough idle cam package - Trunion Upgrade - Valve Springs - Hardened Push rods - 3 bolt timing gear - SLP Under drive pully- Washer bottle relo kit - Hurst Short Throw Shifter with updated pin bushing from C5 member NH-SS - IdealG's improved Master Cylinder - GTO Clutch reservoir - L99 Brake Reservoir - Stainless Braided clutch line - wrapped up with a JRE Tune My SS layed down 462 hp on JRE's Superflow Dyno

06-29-2012, 08:21 AM	#3
GretchenGotGrowl Drives: 2012 LFX/2011 EcoBoost F-150 Join Date: Sep 2010 Location: Little Rock, AR Posts: 3,831 View My Garage	There is an E85 tune available already. It provides a pretty good bump in power and is cheaper than race gas. You might want to look around to see if it is available in your area. __________________ EFR Twin Turbo LFX-GPI Tune-ZL1 fuel pump-10:1 CR forged pistons-3.45 gear-Meth Injection-BMR Trailing Arms, Bushings & Sway Bars-Drag Radials-CircleD 4000 Stall-GPI Fuel Enrichment System 586 RWHP & 606 RWTQ @20 psi on 93 Octane (unlocked converter) 1/8 mile -- 7.158 @ 102.10 (20psi) Build Thread

06-29-2012, 08:58 AM	#4
SC2150 Drives: 2001 Camaro SS Join Date: Dec 2009 Location: Bradenton, FL Posts: 8,014	The DI LLT & LFX certainly will show more power if tuned for higher octain unlike the lower compression LS3/L99. At 11.3-1 CR there is room to use a higher octain fuel...E85 or unleaded race gas. Not economical at all, but the beauty of these DI motors is they can run fine on 87, run better on 93, and room for E85/race gas. Any 9/10-1 will not...it would be a waste. We run 14-1 CR on our race motors with methanol or 116 race fuel. The ECU will detect the knock and pull timing efficiently so thats why 87 is acceptable due to the efficiency of the Direct Injection. On a port injection this is not possible. __________________ www.RevXtreme.com 941-721-1826 Turbo & Supercharging specialist VMax porting development from the begining RX Super Chiller

06-29-2012, 01:28 PM	#5
2011Camaro Drives: 2011 Camaro LS IBM M6 Join Date: Jul 2010 Location: Knoxville,TN/San Deigo,CA Posts: 600	All good info and feedback, I should have started out by saying I realize that race gas is on the high $$ side, but it wouldn't be something I would run daily, just for the weekend play days at the track. __________________ 2011 IBM M6 Built 06/17/2010 Injen CAI,Black Ice-olator, Barton shifter, BBK LT's, DSS aluminum driveshaft, VMAX TB, RX Intake Manifold/Catch-can/Breather, Corsa catback, 18" MSR 045's, Nitto NT555's, Trifecta Tuning. Best ET so far in the 1/8th 9.301 Born on the Island and raised in the sand. Semper Fidelis

07-07-2012, 01:56 PM	#6
hapisok crazier than a coconut Drives: 2010 2SS/RS LS3 Join Date: Jul 2010 Location: virginia Posts: 1,488	gretchen is right. i saw a HUGE bump in my TQ and overall HP on E85. if you have it locally then it would be the best route to go IMO. logged over 3,000 mi's with no issues when i was running it. plus there are a lot of benefits from E85 vs 100-110 race fuel. as mentioned, 1. price 2. advance in timing 3. runs cooler (less likely to melt a piston) 4. smells awesome! the only down side i found was availability but it if is an option it is DEFINITELY worth looking into. __________________

07-09-2012, 09:33 AM	#7
DocT Drives: 2011 Camaro 2LT - MT6 Join Date: Oct 2011 Location: Gainesville Posts: 37	E85 Strong downside is the corrosiveness of E85. It will eat up your soft parts....not worth IMO. Go for the hi-octane fuel - if available in your state, instead. __________________