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Running a very low compression Engine on race fuel
#1505925
09/22/13 09:04 PM
09/22/13 09:04 PM
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Joined: Jan 2003
Posts: 11,710
Portage,michigan
B3422W5
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 11,710
Portage,michigan
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Another thread made me curious about this.
What would be the effect performance wise by running110 race fuel on a 9.5 compression aluminum headed 360?
I have had many arguements with this guy( who doesn't post or read here) telling him his car would probably run better and more consistant if he ditched the race fuel.
He insists on running it because he likes the smell of race fuel.
Is it hurting his ET slip at all to run the stuff?
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Running a very low compression Engine on race fuel
[Re: B3422W5]
#1505926
09/22/13 09:10 PM
09/22/13 09:10 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:
Another thread made me curious about this.
What would be the effect performance wise by running110 race fuel on a 9.5 compression aluminum headed 360?
I have had many arguements with this guy( who doesn't post or read here) telling him his car would probably run better and more consistant if he ditched the race fuel.
He insists on running it because he likes the smell of race fuel.
Is it hurting his ET slip at all to run the stuff?
I started on 112 octane and changed to 110.. that was
all I changed and the car went quicker and faster..
he could be quicker on moose pee fuel(87 octane)
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Re: Running a very low compression Engine on race fuel
[Re: B3422W5]
#1505929
09/22/13 09:35 PM
09/22/13 09:35 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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Why in the world wouldn't he go make a couple runs on 93 octane? He could even put a dash of grape fuel fragrance from Summit, smells like race fuel, I've used it a couple times for car shows and car cruises.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: Running a very low compression Engine on race fuel
[Re: B3422W5]
#1505930
09/22/13 09:47 PM
09/22/13 09:47 PM
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Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED
master
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master
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
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race fuel burns at a slower rate than pump. I use 110 in a 12.5 -1 hemi 114 or 116 slows it down
home of the
Sox and Martin Hemi Duster
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Re: Running a very low compression Engine on race fuel
[Re: ProSport]
#1505931
09/22/13 09:56 PM
09/22/13 09:56 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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Quote:
Why in the world wouldn't he go make a couple runs on 93 octane? He could even put a dash of grape fuel fragrance from Summit, smells like race fuel, I've used it a couple times for car shows and car cruises.
No it does not smell any where close to real race gas. I use the stuff too some times, the stuff from summit is weak. Even the good stuff don't smell like race fuel.
I have ran 110 leaded race gas in a 10.5-1 340 since 1983.
Then I switched to 92 octane about 6 years ago because I drive my car a lot now a days and I can't afford race gas even though I sell it at work. And I'm here to tell you the race gas runs way better in in a low compression motor and cooler.
Plus I have ran straight race gas in in dirt bikes, jets skis, chain saws, weedeaters, 2 stroke dirt bikes love it, generators and many other motors and they all ran much better on race gas. I would mix it half and half with 91 unleaded most of the time, because full strength is not always needed. But I have burned a bunch of it straight and it won't hurt even the weakest motor.
I have been on camping trips to the lake, we ride jet ski/ wave runners during the day and dirt bikes at night. I would bring plenty of mixed race fuel for our 2 stroke dirt bikes.. I would always provide some gas for the jet skis and everyone and I mean everyone would be fired up how good there jet skis ran with it. To the point that I sell lot's of race gas to bike and water craft people now a days.
Everything runs better on race gas, I'm sure.
My 71 stock 340 sure as hell does run better with race gas.
I ran straight race gas in a 87 dodge ramcharger with a 360 quradrajet carb at graval rama here in town and my truck ran the quickest on straight race gas at the 300' sand drags. Then I ran the same ramcharger on race gas and nitrous oxide and it ran 14.20 in the quarter on asphalt with stock 360. I have done plenty of back to back testing years ago to see if it really did help and it always helped. Time clocks don't lie.
Last edited by Challenger 1; 09/22/13 10:14 PM.
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Re: Running a very low compression Engine on race fuel
[Re: ProSport]
#1505932
09/22/13 09:56 PM
09/22/13 09:56 PM
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Joined: Jan 2003
Posts: 11,710
Portage,michigan
B3422W5
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 11,710
Portage,michigan
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Quote:
Why in the world wouldn't he go make a couple runs on 93 octane? He could even put a dash of grape fuel fragrance from Summit, smells like race fuel, I've used it a couple times for car shows and car cruises.
It's my little brother... He won't listen to anything I tell him.
Most of the time he just likes firing it up in his garage, rapping on the gas pedal, and sniffing race gas fumes.... Would be sad if it wasn't true
 
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Running a very low compression Engine on race fuel
[Re: Challenger 1]
#1505937
09/22/13 11:46 PM
09/22/13 11:46 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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Quote:
No it does not smell any where close to real race gas. I use the stuff too some times, the stuff from summit is weak. Even the good stuff don't smell like race fuel.
Uh yea it actually does smell like the 110 Cam2 in my area.
Quote:
Everything runs better on race gas, I'm sure.
Not always, I've seen it too many times where a low compression motor ran better on 93 octane, even with tuning. But if someone says their car would be quicker if they used cheaper gas I'd say prove it!
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Re: Running a very low compression Engine on race fuel
[Re: B3422W5]
#1505938
09/22/13 11:56 PM
09/22/13 11:56 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
Quote:
Why in the world wouldn't he go make a couple runs on 93 octane? He could even put a dash of grape fuel fragrance from Summit, smells like race fuel, I've used it a couple times for car shows and car cruises.
It's my little brother... He won't listen to anything I tell him.
Most of the time he just likes firing it up in his garage, rapping on the gas pedal, and sniffing race gas fumes.... Would be sad if it wasn't true
The smell of Cam 2 is very addictive, there is nothing wrong with your brother just because he likes to fire up the motor to get his cam2 fix,I have done it before and I am ok. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Running a very low compression Engine on race fuel
[Re: dartman366]
#1505939
09/23/13 02:35 AM
09/23/13 02:35 AM
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Joined: Nov 2004
Posts: 7,274
s.w.fl
bonefish
master
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master
Joined: Nov 2004
Posts: 7,274
s.w.fl
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Quote:
Quote:
Quote:
Why in the world wouldn't he go make a couple runs on 93 octane? He could even put a dash of grape fuel fragrance from Summit, smells like race fuel, I've used it a couple times for car shows and car cruises.
It's my little brother... He won't listen to anything I tell him.
Most of the time he just likes firing it up in his garage, rapping on the gas pedal, and sniffing race gas fumes.... Would be sad if it wasn't true
The smell of Cam 2 is very addictive, there is nothing wrong with your brother just because he likes to fire up the motor to get his cam2 fix,I have done it before and I am ok.
I,d get a second opinion 
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Re: Running a very low compression Engine on race fuel
[Re: bonefish]
#1505940
09/23/13 03:47 AM
09/23/13 03:47 AM
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Joined: Jan 2003
Posts: 20,172
Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,172
Park Forest, IL
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I've seen it proven on a chassis dyno many times, race fuel is a waste of money if your motor doesn't have the compression to need it.
My own slow junk would slow down .2 on 100 compared to 93 pump swill.
"Everybody funny, now you funny too."
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Re: Running a very low compression Engine on race fuel
[Re: Mr.Yuck]
#1505942
09/23/13 10:39 AM
09/23/13 10:39 AM
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Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
tubtar
master
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master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
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It doesn't take a lot of mix to keep that fragrant aroma and you also get a bit of detonation protection. I would use the last season's left overs in what ever was closest.......lawn mower , snow blower , motorhome , pick up truck. Even a gallon to 10 - 12 will give you the sweet smell of success. 
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Re: Running a very low compression Engine on race fuel
[Re: B3422W5]
#1505943
09/23/13 10:57 AM
09/23/13 10:57 AM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Go to ProSystems carbs web sight - "under the scoop" - "how to choose an octane".
Fastest 300
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It barely takes any to get the smell