For all those that keep commenting on my post about how Octane dosen't increase HP, please read below. If you have any facts oh how simply adding octane can increase HP by..lets say as much as .5% let me know. Other wise..get over it, stop trollin, do some reading....GG
The difference in octane fuels has nothing to do with the energy stored in the fuel.
Octane has ONLY to do with "Pre-Ignition" or "Ping" caused by higher compression engines. It will not contribute to either performance or economy, nor will it make the engine run any "smoother".
Higher octane fuels contain anti-knock compounds to reduce the temperature of the fuel as it burns.
I love the GT500, but it is just too chubby. It needs to lose atleast 300 lbs. It needs that extra power because in the 2010 C6 Grand Sport vs GT500 comparison, the C6 GS won in every performance category with 100+ less hp. I have seen C6 LS3s with only a supercharger at 8 psi make 580 rwhp with no problem and 93 octane. C6s at just over 3200 lbs making close to 600 rwhp trap in the 130s all day.
I agree. GM has been doing this forever. Like my 87 Gn was rated at 245 hp. Min made 235 rwhp on the dyno. Every LS1 Camaro I have seen dyno 290s+ when rated at 305. I have seen a few LS3 corvettes dyno in the 380s+ depending on transmission. The LS3 is night and day compared to the LS1 & LS2.
I got 450.8 at the crank when you factor in a conservative 15% power loss caused by the drivetrain.. They likely rated it low so people wouldnt laugh at the idea of spending 30k for 55 more hp on the Z06 Lol. Or it could just be a model of dyno that rates a bit high.
Factory could have rated it with Reg Gas aswell... this guy could have Premium + octane boost for all we know lol... Corvettes own anyway I'd buy one ! :D
I dont think so. I think that chevy would rate it with premium since your only supposed to use premium in the car. He may have octane booster but i dont know about GM using regular under HP testing.
No but you can tune for higher horsepower on higher octane. And that has nothing to do with what I said. But yes, you will not run as smoothly or get the HP rating if you put 81 octane in the tank, you can get engine knock. Which in these cars the computer is made to adjust the timing so that it will run safely on it, but will hurt performance.
Proven? Its really just common sense. When running a lower octane fuel you increase the chance of detonation. When the computer senses knock it retards the timing to prevent detonation, in turn robbing power. If you put race gas in this Vette it wouldn't produce more power compared to if you put 93 in it because there would be no KR on 93. Now when you get into high compression or forced induction setups its a different story.
@jeffzahnd No, i'm not. Do some searching on the 2011 V6 mustang. I think motortrend, or some big company, anyway they did dyno testing and with just putting in 93 octane it gained 6whp i think it was.
@texasboy2005 it does not... it only retards the chance of detonation at a higher compression. if you run higher octane it allows for higher compression..that's it.
it sounds like this one is a stick shift .. wonder how different it feels from the auto with the 2.73gear rear end (regular rearend has 2.11gears) i drove them both you CAN tellthe difference ordered 1 today. six weeks wait , but i think i gettin an 09'for same price
the brakes arent that small its just that the rear wheels are quite large thus making them look small and yes the brakes do fade after a few quick laps, there not carbon ceramic
Nah, the quickest stock 'non Z06' Corvette is STILL an LS2 (2005-2007) car...that may change over time but right now there's no shame in owning/driving a pre 2008 Corvette. :-)
Ummm, nope. The LS3 produces more torque and horsepower while having the same overall weight. The new LS3 Corvette is faster in every respect. Sorry big guy.
Again not to say that I don't love the LS2 or any variation of the 6.0L(l76, LQ9, LQ4) but the 6.2l is better in everyway and produces more HP/TQ per liter. LS3>LS2
Under the same track conditions, track temperature, humidity, etc, the LS3 will produce faster times. I'm sure if you hopped behind the wheel of an LS3 you would be producing quicker times.
I am sure there is ECU torque management going on. Remember the LS2's when the C6 first came out? I think Motor Trend or someone couldn't ge tthem under 13.1 with production models but the pre-release cars all did 12.4. It was ECU related.
Aging and tested yes, but then again it is the otherwise exact same car but with some more power, not exactly sure what 'learning curves' or 'testing' is needed to run quicker in what is essentially the same car.
I do agree, the LS3 'engine' is in almost every way better than the LS2 'engine'...but that still doesn't change the fact that a stock LS3 C6 has yet to publicly post a quicker time than the three quickest stock LS2 C6s. :-)
Let us not forget documented on corvetteforum, an LS3 hit mid 11 with just CAI (no tune & stock tires). A similarly modded LS2 not even near this time...
Also, it's only January 2008. Give some time for stock 2008 LS3's to get "broken in and owner track tested", like the thousands of LS2's before it... People need to accept the facts, the general coupe LS3>LS2>LS1>LT1 and so goes this thing of ours...
True, once modified that LS3 really SHINES and it's trap speeds are amazing.
I was talking stock versus stock.
Yes it's still early on in the LS3's life true, but it HAS been out since July or so and it is cold out now, just curious how much more time it needs to prove itself in bone stock trim.
Same exact car as the LS2 C6 plus more power, pretty simple, it should be going quicker.
I wrote that months ago, since then a couple others have gone quicker than my LS2 as well.
No biggie though, the LS3s DO have upwards of 40 more rear wheel horsepower and I DID hold the number one spot on the C6 stock list for over 16 months. :-)
16 months wow great job. A few guys at my track were saying that they have seen 08 LS3's running in high 11's. But I have yet to see that. Im pretty sure mine will do better once I get more miles on it.
What does the factory claim that the 08 C6 is supposed to run at the tracks? I just purchased one today and i know the 0-60 is 4 seconds but i havent heard of any 1/4 mile nubmers. thanks
Yea we got the shaft. I have an 07 auto with american racing hedrs calloway intake magnaflow catback and tuning from vette drs. I dynoed 373.8hp 375tq to the wheels. If I knew about the the ls3, I would have waited. Then again I paid 41k fully loaded.
For all those that keep commenting on my post about how Octane dosen't increase HP, please read below. If you have any facts oh how simply adding octane can increase HP by..lets say as much as .5% let me know. Other wise..get over it, stop trollin, do some reading....GG
jeffzahnd 3 weeks ago
The difference in octane fuels has nothing to do with the energy stored in the fuel.
Octane has ONLY to do with "Pre-Ignition" or "Ping" caused by higher compression engines. It will not contribute to either performance or economy, nor will it make the engine run any "smoother".
Higher octane fuels contain anti-knock compounds to reduce the temperature of the fuel as it burns.
jeffzahnd 3 weeks ago
Adding higher octane fuel than is actually required by the engine management system will only result in two things:
1) A thinner and lighter wallet
2) Occasional difficulty in starting on cool or cold days, and perhaps an inconsistent idle and low end drivability until it warms up.
It is best to stay with what is recommended for the car.
Source(s):
ASE Tech
California Smog Tech
jeffzahnd 3 weeks ago
I want a Corvette =(
kirbyyasha 10 months ago
Quite underated...Makes more like 450 to the engine!
peterjg001 10 months ago
marshmallowrex drives a 1993 civic with a fart cannon from autozone
steelstrings1312 1 year ago 4
I love the GT500, but it is just too chubby. It needs to lose atleast 300 lbs. It needs that extra power because in the 2010 C6 Grand Sport vs GT500 comparison, the C6 GS won in every performance category with 100+ less hp. I have seen C6 LS3s with only a supercharger at 8 psi make 580 rwhp with no problem and 93 octane. C6s at just over 3200 lbs making close to 600 rwhp trap in the 130s all day.
Marc99GT 1 year ago
The LS series of motors never ceases to amaze, LS3 is a beast straight out of the factory.
PvtVVitt 1 year ago
392hp/376tq at the wheels means 467hp/448tq at the motor. This is using 16% drive train loss for an M6 vehicle. Crikey!
Scrimmer08 1 year ago
@Scrimmer08 No Bro Its Really 442Hp And 436Tq
SUPERBADKBOY 1 year ago
I agree. GM has been doing this forever. Like my 87 Gn was rated at 245 hp. Min made 235 rwhp on the dyno. Every LS1 Camaro I have seen dyno 290s+ when rated at 305. I have seen a few LS3 corvettes dyno in the 380s+ depending on transmission. The LS3 is night and day compared to the LS1 & LS2.
Marc99GT 2 years ago
Why do they have a shitty CRT instead of a big LCD? serial
Trey4Fun 2 years ago
Okay if you dyno 392rwhp how many horses to the crank would it be?
marksboyc6 3 years ago
I got 450.8 at the crank when you factor in a conservative 15% power loss caused by the drivetrain.. They likely rated it low so people wouldnt laugh at the idea of spending 30k for 55 more hp on the Z06 Lol. Or it could just be a model of dyno that rates a bit high.
Tracti0nAction 3 years ago
Factory could have rated it with Reg Gas aswell... this guy could have Premium + octane boost for all we know lol... Corvettes own anyway I'd buy one ! :D
Tracti0nAction 3 years ago
I dont think so. I think that chevy would rate it with premium since your only supposed to use premium in the car. He may have octane booster but i dont know about GM using regular under HP testing.
DonBuralli 3 years ago
the amount of octane in your gas dosen't add horses you tardos
jeffzahnd 2 years ago 5
No but you can tune for higher horsepower on higher octane. And that has nothing to do with what I said. But yes, you will not run as smoothly or get the HP rating if you put 81 octane in the tank, you can get engine knock. Which in these cars the computer is made to adjust the timing so that it will run safely on it, but will hurt performance.
DonBuralli 2 years ago
well a tune would make it go from "stock" to modded, and nobody's going to tune a stock corvette to run on 93 with a bottle of octane booster in it.
And your corvettes computer adjusts itself over time by many things, including your driving style.
jeffzahnd 2 years ago
"And your corvettes computer adjusts itself over time by many things, including your driving style." no shit sherlock
DonBuralli 2 years ago
Its actually been proven that higher the octane does amount to more power in alot of cases.
slvrbllt 2 years ago
Proven? Its really just common sense. When running a lower octane fuel you increase the chance of detonation. When the computer senses knock it retards the timing to prevent detonation, in turn robbing power. If you put race gas in this Vette it wouldn't produce more power compared to if you put 93 in it because there would be no KR on 93. Now when you get into high compression or forced induction setups its a different story.
flymotocross63 2 years ago
@jeffzahnd actually it can.
DwnNvr 11 months ago
@DwnNvr can how? you are confused sir
jeffzahnd 11 months ago
@jeffzahnd No, i'm not. Do some searching on the 2011 V6 mustang. I think motortrend, or some big company, anyway they did dyno testing and with just putting in 93 octane it gained 6whp i think it was.
DwnNvr 11 months ago
@jeffzahnd it does, racing fuel vs pump gas look it up
n9athan 7 months ago
@jeffzahnd it does if you have a tune, you can advance timing
testify221 1 month ago
@jeffzahnd It does add hp actually.
texasboy2005 3 weeks ago
@texasboy2005 it does not... it only retards the chance of detonation at a higher compression. if you run higher octane it allows for higher compression..that's it.
jeffzahnd 3 weeks ago
Yea thats a bit high (392)... I think the dyno was either not calibrated properly or the conditions were perfect or its running lean...IMO
dpihitithard 2 years ago
it sounds like this one is a stick shift .. wonder how different it feels from the auto with the 2.73gear rear end (regular rearend has 2.11gears) i drove them both you CAN tellthe difference ordered 1 today. six weeks wait , but i think i gettin an 09'for same price
casinopitbull 3 years ago
uhh???yeah,love the vet,but wtf??i dont have x-ray vision
wellshii 4 years ago
the brakes arent that small its just that the rear wheels are quite large thus making them look small and yes the brakes do fade after a few quick laps, there not carbon ceramic
thehowl666 4 years ago
cuz its the rear brakes the front ones are much bigger
1998camaross 4 years ago
I cant believe these cars dont suffer from brake fade on the tracks. Those rear brakes seem really small for a car that can go very fast.
ThunderAppeal 4 years ago
the c6 is so nice. i can only afford the c5 but i wont be disappointed
rootstype 4 years ago
What are the LS3 rated at from the factory as far as bhp not rwhp
06saleen3v 4 years ago
430hp (436hp with the optional exhaust) and 424tq (428tq with the optional exhaust), at the crank. :-)
LS1LT1 4 years ago
Got the shaft?
Nah, the quickest stock 'non Z06' Corvette is STILL an LS2 (2005-2007) car...that may change over time but right now there's no shame in owning/driving a pre 2008 Corvette. :-)
LS1LT1 4 years ago
Ummm, nope. The LS3 produces more torque and horsepower while having the same overall weight. The new LS3 Corvette is faster in every respect. Sorry big guy.
Again not to say that I don't love the LS2 or any variation of the 6.0L(l76, LQ9, LQ4) but the 6.2l is better in everyway and produces more HP/TQ per liter. LS3>LS2
rm125 4 years ago
Yes, the LS3 does in fact produce more horsepower and torque ON A DYNO but as of yet it HAS NOT produced a quicker 1/4 mile ET in bone stock trim.
LS2 = 12.21@115.45
LS3 = 12.40@114+
Hard to believe but as of this moment it is true.
How do I know this?
Because I happen to be the owner behind the wheel of that very same stock 12.2 second LS2 C6. :-D
LS1LT1 4 years ago
Under the same track conditions, track temperature, humidity, etc, the LS3 will produce faster times. I'm sure if you hopped behind the wheel of an LS3 you would be producing quicker times.
rm125 4 years ago
That is very possible yes, I know almost for sure that at least the trap speed will be higher in the LS3 under the same air/track conditions.
As for ET, it depends on just how intrusive/invasive the PCM control/torque management is on the new cars.
If I ever replace my LS2 with a new C6 I will certainly attempt to find that out. :-)
LS1LT1 4 years ago
I am sure there is ECU torque management going on. Remember the LS2's when the C6 first came out? I think Motor Trend or someone couldn't ge tthem under 13.1 with production models but the pre-release cars all did 12.4. It was ECU related.
dsm2xtreme 4 years ago
LS2 has been aging and tested since 2005. LS3 just released, give her some time... However, the facts are clear, LS3>LS2.
tjnappy 4 years ago
Aging and tested yes, but then again it is the otherwise exact same car but with some more power, not exactly sure what 'learning curves' or 'testing' is needed to run quicker in what is essentially the same car.
I do agree, the LS3 'engine' is in almost every way better than the LS2 'engine'...but that still doesn't change the fact that a stock LS3 C6 has yet to publicly post a quicker time than the three quickest stock LS2 C6s. :-)
LS1LT1 4 years ago
Let us not forget documented on corvetteforum, an LS3 hit mid 11 with just CAI (no tune & stock tires). A similarly modded LS2 not even near this time...
Also, it's only January 2008. Give some time for stock 2008 LS3's to get "broken in and owner track tested", like the thousands of LS2's before it... People need to accept the facts, the general coupe LS3>LS2>LS1>LT1 and so goes this thing of ours...
tjnappy 4 years ago
True, once modified that LS3 really SHINES and it's trap speeds are amazing.
I was talking stock versus stock.
Yes it's still early on in the LS3's life true, but it HAS been out since July or so and it is cold out now, just curious how much more time it needs to prove itself in bone stock trim.
Same exact car as the LS2 C6 plus more power, pretty simple, it should be going quicker.
LS1LT1 4 years ago
I got you beat. My stock 08 LS3 just ran 12.14@117mph last weekend at the local track. So I don't know why you would say LS2's are faster!
GKaly 3 years ago
Why? Because at the time it was TRUE LOL!
I wrote that months ago, since then a couple others have gone quicker than my LS2 as well.
No biggie though, the LS3s DO have upwards of 40 more rear wheel horsepower and I DID hold the number one spot on the C6 stock list for over 16 months. :-)
LS1LT1 3 years ago
16 months wow great job. A few guys at my track were saying that they have seen 08 LS3's running in high 11's. But I have yet to see that. Im pretty sure mine will do better once I get more miles on it.
GKaly 3 years ago
Yeah the LS3 is no joke...I do LOVE my car but even I've considered getting a 2009. :-)
LS1LT1 3 years ago
What does the factory claim that the 08 C6 is supposed to run at the tracks? I just purchased one today and i know the 0-60 is 4 seconds but i havent heard of any 1/4 mile nubmers. thanks
DonBuralli 3 years ago
WOW! No offense, but I have to say BS...Numbers talk so send me a link to the dyno sheet...I would love to see that and then I'll believe you..
dpihitithard 2 years ago
Comment removed
IrishChris1979 2 years ago
I've heard alotta diehard 07 C6 owners were pissed about the outcome of the 08". They got the shaft, lol!!
IRONBULL777 4 years ago
Yea we got the shaft. I have an 07 auto with american racing hedrs calloway intake magnaflow catback and tuning from vette drs. I dynoed 373.8hp 375tq to the wheels. If I knew about the the ls3, I would have waited. Then again I paid 41k fully loaded.
thekingisback456 3 years ago 2
373 is slow when a GTO gets 373 with American Racing Headers, and a LM exhaust. Should take it to another place and have them retune it.
GetOffMyMonkeyBalls 3 years ago
LS3?? they got sick of the LS2 already damn lol
DarrenWS6 4 years ago
remember, that 392RW is on the new rating system.
10 percent drive train loss = 435.5HP and 417 TQ.
Nice numbers.
MY 06 pulls 427 and 430 TQ with CAI and Bullets.
Not selling, but only for the Z06 upgrade.
frankpaws 4 years ago
392 to the wheels for the LS3 not bad a little mods like exhaust and intake headers you can get that 436HP back and maybe a little
more.
BoomBoomStockings1 4 years ago
wow now thats what i call chevy power
09camaross427 4 years ago
ooooh shit... now i gotta sell my o6 z51!!
khaledster 4 years ago