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Re: Does race gas improve every engines performance?
[Re: sunroofgtx]
#1066429
08/31/11 12:38 PM
08/31/11 12:38 PM
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Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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More octane only makes you go slower if you dont need it to prevent detonation. The higher the octane the slower the gas burns.
Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: Does race gas improve every engines performance?
[Re: max_maniac]
#1066432
08/31/11 01:30 PM
08/31/11 01:30 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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Pump gas is oxegenated. So if you do not need the extra octane then it is faster.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: Does race gas improve every engines performance?
[Re: sunroofgtx]
#1066433
08/31/11 01:34 PM
08/31/11 01:34 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Just wondering what you guys have experimented with. My Hemi is around 10.75 to 1. N/A and only a 472 with a well-tuned Dominator. Wondering if I should throw some in, if it will kick it up a notch. Thanks.. Need every tip going against a 68 Black Pig at Norwalk !! LOL    
I started out using 114 octane and I switched to 112
and the car picked up in MPH and ET... if you dont
change timing to compensate for the slower burn rate
of the higher octane you WILL go slower... also there
is a point where if you add timing its a hindrance
slowing the piston way down the cyl... have to balance
the octane to timing based on compression and efficiency
of the head
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Re: Does race gas improve every engines performance?
[Re: sunroofgtx]
#1066434
08/31/11 01:41 PM
08/31/11 01:41 PM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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The only way to know what works is to try it on your engine. Some fuels have have a faster burn speed than others,some have more btu's per gallon than others. Octane is just an indicator of a fuel's resistance to detonation and does not really indicate a good fuel. I tested two different brands of pump premium and saw major hp and torque differences on my dyno. The local Citgo was better than the Sunoco around here. It depends on many factors,not just compression ratio.  Keith
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Re: Does race gas improve every engines performance?
[Re: sunroofgtx]
#1066437
08/31/11 01:58 PM
08/31/11 01:58 PM
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Joined: Nov 2004
Posts: 1,708
S. Il. U.S.A.
5spdcuda
top fuel
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top fuel
Joined: Nov 2004
Posts: 1,708
S. Il. U.S.A.
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I agree with those that have pointed out that you only need enough octane to prevent detonation while still maintaining optimal timing advance. Only Dunnuck touched on BTUs. This is an often overlooked factor and is separate from octane. There's a reason why gasoline suppliers work so closely with engine manufactures in F1. It's worth remembering that every bit of power that an engine produces comes from it's fuel. It may well pay you to try different brands. Gasoline is blended for different regions and seasons so what works well in one place may not be the hot ticket somewhere else.
Last edited by 5spdcuda; 08/31/11 02:05 PM.
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Re: Does race gas improve every engines performance?
[Re: 5spdcuda]
#1066438
08/31/11 02:07 PM
08/31/11 02:07 PM
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Joined: Dec 2003
Posts: 901
oh
julian2007
super stock
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super stock
Joined: Dec 2003
Posts: 901
oh
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Years ago my friends and I bought three brand new rm 250 dirt bikes and they could never figure out why mine was faster than theirs I ran 112 they ran pump gas.Mine would flip over in 6th gear theirs would just get the tire off the ground.My chain saw also loves it 1st pull every time but with pump gas two or three pulls, you can lay on the saw harder to with the 112.Their are lots of people smarter than me I can't tell you anything about burn rates or the reasons why it should or should not work but I have run 112 in everything from a chain saw to a bass boat to a race car and always had better performance. btw I see more performance gain in the two stroke stuff than in the four stroke.
Last edited by julian2007; 09/01/11 02:14 PM.
God made cold beer,good friends,hot ladies and race cars don't spit in his face by pi$$ing and moaning about how life sucks!!!
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Re: Does race gas improve every engines performance?
[Re: Challenger 1]
#1066439
08/31/11 02:12 PM
08/31/11 02:12 PM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
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Quote:
Yes it will, in every case I've ever experienced.
I've used it in everything you can imagine.
I sell it and have taken it on boating/jetski trips and have lent some to friends. They loved it and windup buying it for special trips and such.
Also have taken it on ATV trips and the same thing, let someone borrow some and they can't beleive how well there bikes runs on it and windup buying for there bikes.
I have had some in the garage for my 2 stroke bikes and have used in weed eaters and chainsaws, they scream on it.
Everthing I've ever put it in has run noticably better. Smells good too. lol
I have to agree with this completely.
Everything including a 318 4bbl van with 340 heads ran like a top on a race gas mix. I usually run 5-8 gallons of 110 to a full tank of our crappo 87 or 89 octane fuel. There is only 3 places close to me within 30 miles that have 91. The 89 is 10% ethy, and the Demon DOES NOT like that stuff.
So in my case with the crap fuel we have, I have to say YES bump it inn, and enjoy the smell, and clean pipes. I even put a tad bit in my 06 ultra classic.
Kasey
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Re: Does race gas improve every engines performance?
[Re: Dunnuck Racing]
#1066440
08/31/11 02:15 PM
08/31/11 02:15 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
The only way to know what works is to try it on your engine.
Yep, there's your answer.
And the terse response to your "Why?" question is "Because it ain't just about the octane."
"Good" gas CAN make more power than "OK" gas, even when the "OK" gas has sufficient octane and the "Good" gas appears to be way overkill... but it's not a sure thing.
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Re: Does race gas improve every engines performance?
[Re: sunroofgtx]
#1066441
08/31/11 02:50 PM
08/31/11 02:50 PM
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Joined: Oct 2007
Posts: 4,210
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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If octane is raised with additives, those chemicals produce no BTU, but replace gasoline that does.
Boffin Emeritus
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Re: Does race gas improve every engines performance?
[Re: Challenger 1]
#1066443
08/31/11 03:27 PM
08/31/11 03:27 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Yes it will, in every case I've ever experienced.
I've used it in everything you can imagine.
I sell it and have taken it on boating/jetski trips and have lent some to friends. They loved it and windup buying it for special trips and such.
Also have taken it on ATV trips and the same thing, let someone borrow some and they can't beleive how well there bikes runs on it and windup buying for there bikes.
I have had some in the garage for my 2 stroke bikes and have used in weed eaters and chainsaws, they scream on it.
Everthing I've ever put it in has run noticably better. Smells good too. lol
Both of my bikes(Harley and Honda) HATED the higher
octane fuel... I made the mistake of putting the Sunoco
blue racing fuel in and it would barely idle let alone
at higher rpms... plus I proved more octane isnt
always better when I went from 114 to 112 with NO
other changes
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Re: Does race gas improve every engines performance?
[Re: MR_P_BODY]
#1066444
08/31/11 03:47 PM
08/31/11 03:47 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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IMO 110 leaded fuel is the ticket for most cases(street strip cars, boats bikes), not 112, not 114 or 116 or 118. Now I'm not talking racing engines, just a hot street engine will really wake up with 110 leaded.
I had some Sunoco Maximal(118 pro stock gas) that I run in a drag bike, lot's of revs and 15-1. When I sold the bike I tried to burn that 118 like I did 110. It didn't run right and pretty much sucked for at the time 6.00-8.00 dollar a gallon gas.
Like a lot of guys have pointed out, yourself included higher octane is not always better.
But I got to say, I've never seen anything not run better on 110 leaded, it's the nector of the engine gods. lol
Sunoco/Cam2 standard is 110/112 and it's purple, supreme is 112/114 and blue and maximal is 116/118 and red. depending how it's rated.
Most places that sell it at the pump is 110 leaded, we also sell at the pump nowadays is 100 octane unleaded for the computer cars. It's getting more popular. It's the same cost as 110 leaded so I have never tried it yet.
Yes lets say you ran red maximal in a engine turning 7000 rpm or so, the blue with lower octane is gonna run much better in that engine because the red is made for really high rpm engines with hi compression ratios.
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Re: Does race gas improve every engines performance?
[Re: Challenger 1]
#1066446
08/31/11 05:27 PM
08/31/11 05:27 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
IMO 110 leaded fuel is the ticket for most cases(street strip cars, boats bikes), not 112, not 114 or 116 or 118. Now I'm not talking racing engines, just a hot street engine will really wake up with 110 leaded.
I had some Sunoco Maximal(118 pro stock gas) that I run in a drag bike, lot's of revs and 15-1. When I sold the bike I tried to burn that 118 like I did 110. It didn't run right and pretty much sucked for at the time 6.00-8.00 dollar a gallon gas.
Like a lot of guys have pointed out, yourself included higher octane is not always better.
But I got to say, I've never seen anything not run better on 110 leaded, it's the nector of the engine gods. lol
Sunoco/Cam2 standard is 110/112 and it's purple, supreme is 112/114 and blue and maximal is 116/118 and red. depending how it's rated.
Most places that sell it at the pump is 110 leaded, we also sell at the pump nowadays is 100 octane unleaded for the computer cars. It's getting more popular. It's the same cost as 110 leaded so I have never tried it yet.
Yes lets say you ran red maximal in a engine turning 7000 rpm or so, the blue with lower octane is gonna run much better in that engine because the red is made for really high rpm engines with hi compression ratios.
When I referred to Sunoco Blue it was the so called
race fuel you could buy at the pumps some years back
(dont know if its still sold or not) my bikes sure
didnt like it... it ran bad enough that I drained it
out and re fueled
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and I know we/he will then you don't stand a chance 
