Pump Gas vs Race Gas
12-24-2008, 04:33 PM
#1
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Location: Boston, Dallas, Detroit, SoCal, back to Boston MA
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Pump Gas vs Race Gas
Cool article, just wish they did a boosted engine as well.
http://www.popularhotrodding.com/tec...gas/index.html
Good tips on tuning as well.
http://www.popularhotrodding.com/tec...gas/index.html
Good tips on tuning as well.
12-24-2008, 05:15 PM
#2
Drifting
wow
Cool article, just wish they did a boosted engine as well.
http://www.popularhotrodding.com/tec...gas/index.html
Good tips on tuning as well.
http://www.popularhotrodding.com/tec...gas/index.html
Good tips on tuning as well.
12-24-2008, 11:24 PM
#3
Drifting
Cool article, just wish they did a boosted engine as well.
http://www.popularhotrodding.com/tec...gas/index.html
Good tips on tuning as well.
http://www.popularhotrodding.com/tec...gas/index.html
Good tips on tuning as well.
1. Any slight/insignificant improvement in HP isn't worth the extra cost in fuel price.
2. Your results may vary slightly as each engine is different.
When I had the '70 Corvette, with the LS5 big block, I used octane additive at the drag strip to provide extra pre-detonation protection. Chevrolet said the LS5 engine should use 96 octane, so I was just trying to get the octane up to manufacturer's specs. I noticed a slight HP gain, because it was knocking less, but I was actually trying to prevent engine damage. I never tried any race gas...
Bob
Last edited by bobmoore2; 12-24-2008 at 11:31 PM.
12-25-2008, 03:40 AM
#4
Team Owner
No surprises for me.
1. Any slight/insignificant improvement in HP isn't worth the extra cost in fuel price.
2. Your results may vary slightly as each engine is different.
When I had the '70 Corvette, with the LS5 big block, I used octane additive at the drag strip to provide extra pre-detonation protection. Chevrolet said the LS5 engine should use 96 octane, so I was just trying to get the octane up to manufacturer's specs. I noticed a slight HP gain, because it was knocking less, but I was actually trying to prevent engine damage. I never tried any race gas...
Bob
1. Any slight/insignificant improvement in HP isn't worth the extra cost in fuel price.
2. Your results may vary slightly as each engine is different.
When I had the '70 Corvette, with the LS5 big block, I used octane additive at the drag strip to provide extra pre-detonation protection. Chevrolet said the LS5 engine should use 96 octane, so I was just trying to get the octane up to manufacturer's specs. I noticed a slight HP gain, because it was knocking less, but I was actually trying to prevent engine damage. I never tried any race gas...
Bob
Are you still going to the track??
You might win $50 at WSIR ......
http://forums.corvetteforum.com/sout...s-feb-7-a.html
DH
12-26-2008, 04:50 AM
#5
Drifting
Hey Bob
Are you still going to the track??
You might win $50 at WSIR ......
http://forums.corvetteforum.com/sout...s-feb-7-a.html
DH
Are you still going to the track??
You might win $50 at WSIR ......
http://forums.corvetteforum.com/sout...s-feb-7-a.html
DH
I've been trying to do about one event a month at the NorCal tracks.
Enough 'Thread Hijacking'. Do you have any comments about race gas?
12-26-2008, 10:15 AM
#6
Team Owner
IF I was still living in SoCal, I'd find a way to get there Feb. 7th. I might be able to beat your 1:37 now that I've got an LS6 engine in my car.
I've been trying to do about one event a month at the NorCal tracks.
Enough 'Thread Hijacking'. Do you have any comments about race gas?
I've been trying to do about one event a month at the NorCal tracks.
Enough 'Thread Hijacking'. Do you have any comments about race gas?
(at least I know why I havn't seen you around)As far as comments on gas .......
I used to use 100 or octane boosters on my last car (modded engine)
But I havn't heard as much as one tiny ping in 16K miles on this motor (LS7)
DH
12-26-2008, 10:37 PM
#7
Drifting
Popular Hotrodding's results are opposite to the results Roadracing World and Motorcycle Technology got when they tested different fuels. Of course motorcycle engines are not the same design as most car engines. Usually running 12-13:1 compression and much higher specific output.
Roadracing World concluded that for the difference in fuel money spent over a season of racing the 5% or so increase in horsepower was money well spent.
I wish I knew more about engines. I'd like to get my LS6 to have 150rwhp per liter like my R1 has. 855 normally aspirated rwhp with perfectly smooth driveability would be great.
Interestingly, if you compare torque per liter the car would only have to make 460 lb/ft to equal the bike. Obviously many people achieve that. Now if we could get an LS6 to safely spin to 12,000 rpm I think I'd have what I want.
Dog
Roadracing World concluded that for the difference in fuel money spent over a season of racing the 5% or so increase in horsepower was money well spent.
I wish I knew more about engines. I'd like to get my LS6 to have 150rwhp per liter like my R1 has. 855 normally aspirated rwhp with perfectly smooth driveability would be great.
Interestingly, if you compare torque per liter the car would only have to make 460 lb/ft to equal the bike. Obviously many people achieve that. Now if we could get an LS6 to safely spin to 12,000 rpm I think I'd have what I want.
Dog
12-27-2008, 04:28 PM
#8
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But those are high compression engines, similar to high boost engines, I'd expect to see a large gain.
I also posted in the Engine mods section
One poster asked:
My reply was:
I also posted in the Engine mods section
One poster asked:
I do not agree with this test.
Race gas is not only a octane question.
A good quality race gas will have way more to give.
Using a ZZ4 that most probably is around 9.5 compression is not the way to go and can only result in what you just read in this test. race gas will be effective with high compression.
More compression and the more energy the race gas will give you.
According to your compression ratio, with a minimum of 11.5, the race gas will be effective because it allows a much leaner ratio as it comtained much more oxygen generators.
Tipicaly, a race gas will require a 19/1 AF ratio. I have even seen and tested 21/1.
This means that you need way less oxygen (air) to generate the same energy.
As a mater of facts, I am using Lemans series race gas with my 1991 Z07 L98 stock and using it allows the stock TPI to rev up 5500 like a monster.(over 350 hp with stock setup, modified injector and extremly precise dyno tune ).
This is exactly how it is working.
Modern Race engines that have air restrictions to avoid to much HP (lemans series regulations for instance) use high quality race gas that allows them to rev high even if the engine is starving for air as the race gas does contains oxygen.
You have 2 kind of race gas. Classic with octane + only and the real stuff (octane + oxygen generators).
Race gas is not only a octane question.
A good quality race gas will have way more to give.
Using a ZZ4 that most probably is around 9.5 compression is not the way to go and can only result in what you just read in this test. race gas will be effective with high compression.
More compression and the more energy the race gas will give you.
According to your compression ratio, with a minimum of 11.5, the race gas will be effective because it allows a much leaner ratio as it comtained much more oxygen generators.
Tipicaly, a race gas will require a 19/1 AF ratio. I have even seen and tested 21/1.
This means that you need way less oxygen (air) to generate the same energy.
As a mater of facts, I am using Lemans series race gas with my 1991 Z07 L98 stock and using it allows the stock TPI to rev up 5500 like a monster.(over 350 hp with stock setup, modified injector and extremly precise dyno tune ).
This is exactly how it is working.
Modern Race engines that have air restrictions to avoid to much HP (lemans series regulations for instance) use high quality race gas that allows them to rev high even if the engine is starving for air as the race gas does contains oxygen.
You have 2 kind of race gas. Classic with octane + only and the real stuff (octane + oxygen generators).