Hmm...higher octane? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Shadowsong · 08-20-2008, 04:14 PM

So, I was thinking about this, if we reflashed the ecu to run on 93 octane... I wonder how much hp we would gain...?

Xanthos · 08-21-2008, 01:48 AM

I don't know. Maybe a bunch, maybe none at all. Not sure.
- Xanthos

headpunter · 08-21-2008, 01:50 AM

probably not that much only so much can be earned throught timing.and timings is all you gain with higher octane fuel

*Mr. Wyndham* · 08-21-2008, 11:49 AM

Apparently, the L76 in the G8 GT gains near 40hp when reflashed for premium...

I wonder what role the Direct Injection and VVT could play as far as timing and increased power output. The potential could be great.

*The_Blur* · 08-21-2008, 12:07 PM

Quote:

Originally Posted by Dragoneye

Apparently, the L76 in the G8 GT gains near 40hp when reflashed for premium...

I wonder what role the Direct Injection and VVT could play as far as timing and increased power output. The potential could be great.

That's a great thought! We need to test this out when HPTuners becomes available with a variety of octanes.

BowtieGuy · 08-21-2008, 12:13 PM

Quote:

Originally Posted by Dragoneye

Apparently, the L76 in the G8 GT gains near 40hp when reflashed for premium...

I wonder what role the Direct Injection and VVT could play as far as timing and increased power output. The potential could be great.

This is true, but it's also entirely possible that because of the actual function of VVT (adjust timing to avoid knock) and the complex algorithms in the ECM from the factory, this gain could be totally very small or totally negated.

Shadowsong · 08-21-2008, 01:45 PM

Quote:

Originally Posted by Dragoneye

Apparently, the L76 in the G8 GT gains near 40hp when reflashed for premium...

I wonder what role the Direct Injection and VVT could play as far as timing and increased power output. The potential could be great.

IF, and thats a big if, the LLT gains about the same, we could see 330hp at the wheels with just a tune, cai and exhaust

Thats Pretty nice for a v6 with minor mods.

Xanthos · 08-21-2008, 02:06 PM

Its more horses than the challenger R/T has, and still lighter too. But would you really need to reflash for premium to gain that much? Maybe just a dyno tune in general would do the trick.
- Xanthos

*The_Blur* · 08-21-2008, 02:12 PM

Quote:

Originally Posted by Shadowsong

IF, and thats a big if, the LLT gains about the same, we could see 330hp at the wheels with just a tune, cai and exhaust

Thats Pretty nice for a v6 with minor mods.

In another spread, there was a post that suggested that we could see even more benefit than that without endangering the motor.

Shadowsong · 08-21-2008, 02:13 PM

Quote:

Originally Posted by The_Blur

In another spread, there was a post that suggested that we could see even more benefit than that without endangering the motor.

Got a link? I'd like to read into it

gunslinger · 08-24-2008, 02:56 PM

Quote:

Originally Posted by Shadowsong

IF, and thats a big if, the LLT gains about the same, we could see 330hp at the wheels with just a tune, cai and exhaust

Thats Pretty nice for a v6 with minor mods.

That 40 HP bump was on a V8, with two more cylinders realizing a power gain.

And 330HP at the wheels is close to 380HP at the crank, the same amount of HP the stock L76 (6.0L V8) makes.

Also, the power may be 330 HP at the wheels, but what is the average HP compared to an equivalent HP V8? Probably a lot less, with torque also being less.

I agree, the power gains for the V6 sound very impressive for a cheaper motor (than the V8), but I don't want people to think that their V6 will be a V8 beater...(well maybe a GT beater

)

MerF · 08-24-2008, 07:25 PM

Quote:

Originally Posted by XanthosV6

Its more horses than the challenger R/T has, and still lighter too. But would you really need to reflash for premium to gain that much? Maybe just a dyno tune in general would do the trick.
- Xanthos

Well, what exactly do you think you're tuning on the dyno? Yup, you're tuning the fuel map of ECU (aka-flashing)! So essentially you're referring to the exact same thing.

headpunter · 08-24-2008, 09:45 PM

the direct injection engine doesnt benefit allot from changing the octane because it injects the fuel directly into the cylinder right before the apex of the cylinder stroke so it. so there is no threat of detonation.

Vash · 08-25-2008, 12:11 AM

The engine control probably will be able to detect the octane level and make adjustments without programming anything. That's part of how high compression engines self tune to reduce knock.

08-20-2008, 04:14 PM	#1
Shadowsong Drives: 2014 Mustang Join Date: Apr 2007 Location: Conroe, Texas Posts: 642	Hmm...higher octane? So, I was thinking about this, if we reflashed the ecu to run on 93 octane... I wonder how much hp we would gain...?

08-21-2008, 01:48 AM	#2
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	I don't know. Maybe a bunch, maybe none at all. Not sure. - Xanthos __________________ 2017 1LT/RS A8 Hyper Blue Metallic

08-21-2008, 11:49 AM	#4
Mr. Wyndham I used to be Dragoneye... Drives: 2018 ZL1 1LE Join Date: Jan 2007 Location: Buffalo, NY Posts: 31,876 View My Garage	Apparently, the L76 in the G8 GT gains near 40hp when reflashed for premium... I wonder what role the Direct Injection and VVT could play as far as timing and increased power output. The potential could be great. __________________ *"Keep the faith."* - Fbodfather

08-21-2008, 02:06 PM	#8
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	Its more horses than the challenger R/T has, and still lighter too. But would you really need to reflash for premium to gain that much? Maybe just a dyno tune in general would do the trick. - Xanthos __________________ 2017 1LT/RS A8 Hyper Blue Metallic

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08-21-2008, 01:50 AM	#3
headpunter Not That sad..considering Drives: Man Join Date: Aug 2007 Location: the part of washington the capital forgot about. Posts: 3,747 View My Garage	probably not that much only so much can be earned throught timing.and timings is all you gain with higher octane fuel

08-24-2008, 09:45 PM	#13
headpunter Not That sad..considering Drives: Man Join Date: Aug 2007 Location: the part of washington the capital forgot about. Posts: 3,747 View My Garage	the direct injection engine doesnt benefit allot from changing the octane because it injects the fuel directly into the cylinder right before the apex of the cylinder stroke so it. so there is no threat of detonation.

08-25-2008, 12:11 AM	#14
Vash Drives: 00 Blazer Join Date: Aug 2008 Location: Texas Posts: 5,104	The engine control probably will be able to detect the octane level and make adjustments without programming anything. That's part of how high compression engines self tune to reduce knock.