11-26-2020, 09:04 PM | #1 |
Drives: 2020 1SS 1LE M6 Riverside Bl Metall Join Date: Oct 2020
Location: Sacramento Area, CA
Posts: 38
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What HP Boost Using 100 Octane Unleaded?
Would filling up a the Track for a HPDE with 100 octane unleaded add any speed on a straightaway? When my times are more consistent it would be an easy thing to try. But I was wondering if the computer would allow for more advance or would it need to be programmed to take advantage of the higher octane?
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11-26-2020, 09:14 PM | #2 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,558
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Theoretically the ECM should allow a bit more dynamic advance and a bit higher AF ratio on 100 octane versus 93
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
11-26-2020, 09:38 PM | #3 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,749
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Yes on the timing advance (up to whatever your high octane table calls for). No on the AF ratio. The PE enrichment table doesn’t change based on fuel octane, only ethanol content (assuming you setup the flex fuel table that way).
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
Last edited by Joshinator99; 11-27-2020 at 07:57 AM. |
11-27-2020, 06:41 AM | #4 |
Drives: '18 1SS 1LE Join Date: Sep 2017
Location: Pennsyltucky
Posts: 2,571
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I'm pretty sure 100 octane won't add power, it will just prevent timing from being pulled due to spark knock from inferior fuel.
In fact some might argue 100 could reduce power from cooler combustion temps, and less peak cylinder pressure.
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'18 1SS 1LE Black, PDR
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11-27-2020, 07:57 AM | #5 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,749
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On a stock LT1, 100 is probably overkill. Some 93 with a splash of Boostane will probably let you keep full timing advance the vast majority of the time.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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11-27-2020, 08:14 AM | #6 |
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I had to put in half a tank of 100 when the pump at the track ran out of 93. I could not tell any difference in power the rest of the day. I talked to my mechanic who said it's fine to do but you're not going to see any extra power unless you're tuned for it. Our cars are tuned for max power using 93. Also the 100 was like $8 a gallon.
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11-28-2020, 10:13 AM | #7 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,598
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Quote:
My blown SS can keep up full timing advance in hot weather with a little octane booster (I use Race-Gas and blend to 95), a stock LT1 will definitely be even less fussy.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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11-28-2020, 10:30 AM | #8 | |
Drives: 2018 Camaro 1SS 1LE Join Date: Sep 2018
Location: Front Range, CO
Posts: 1,865
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Quote:
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