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Race Fuel in a street car #996251 05/20/11 03:23 PM 05/20/11 03:23 PM
Joined: Jul 2007 Posts: 2,554 Maryland wally426ci OP master
wally426ci OP master Joined: Jul 2007 Posts: 2,554 Maryland	I thought about expirementing with 100 octane race fuel in my 412 stroker. I dont race, but i figured it may be neat to mess around with a gallon added to end in a full tank. Are there any concerns, negatives? postitives? I am no expert, so I am not looking for responses that say "whats the point?" I thought it may put a little more pep in my step. $8.98 a gallon at Sunoco up the street from me and you can pump straight into the car up to $140.

Re: Race Fuel in a street car [Re: wally426ci] #996252 05/20/11 04:08 PM 05/20/11 04:08 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Are there any concerns, negatives? postitives? the (only) negative afaik is that it will flatten your wallet. The positive is it's the best plan for a high DCR/fast curve eng to elim deadly pinging. You'd want to add your quantity in the middle of the tank or else slosh it around thoroughly for a uniform mix. If you build a monster it needs to b fed properly. EDIT Forgot about the lead content advantage for your valves/seats but it'd take alot more than a gallon to have a positive effect on that Last edited by RapidRobert; 05/20/11 04:12 PM. live every 24 hour block of time like it's your last day on earth

Re: Race Fuel in a street car [Re: wally426ci] #996253 05/20/11 04:14 PM 05/20/11 04:14 PM
Joined: Jul 2008 Posts: 205 Martinsville, VA 4 440child enthusiast
440child enthusiast 4 Joined: Jul 2008 Posts: 205 Martinsville, VA	I did it a long time ago in a 440 '67 GTX I had. Just 1 tank, but I could really tell the difference. I also have a friend that was in the Navy back in the day, he said he used to run straight avgas in his when he came home on leave. Said it was almost like having nitrous .

Re: Race Fuel in a street car [Re: 440child] #996254 05/20/11 04:23 PM 05/20/11 04:23 PM
Joined: Jan 2005 Posts: 1,527 minnesota Kirby pro stock
Kirby pro stock Joined: Jan 2005 Posts: 1,527 minnesota	Smells good!

Re: Race Fuel in a street car [Re: Kirby] #996255 05/20/11 04:32 PM 05/20/11 04:32 PM
Joined: Jan 2003 Posts: 5,137 East Aurora (Buffalo) NY RoadRunner master
RoadRunner master Joined: Jan 2003 Posts: 5,137 East Aurora (Buffalo) NY	Quote: Smells good! 68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1

Re: Race Fuel in a street car [Re: RoadRunner] #996256 05/20/11 05:14 PM 05/20/11 05:14 PM
Joined: Jan 2003 Posts: 21,065 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,065 Niles , Ohio	One gallon in a full tank wont do anything but waste $$$$$.I run 112 in my 440 on the street at times.It has 12.5 domes so it helps.Usually I just run 93 and keep my foot out of it.Rocky Chrysler Firepower

Re: Race Fuel in a street car [Re: therocks] #996257 05/20/11 05:19 PM 05/20/11 05:19 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: One gallon in a full tank wont do anything but waste $$$$$.I run 112 in my 440 on the street at times.It has 12.5 domes so it helps.Usually I just run 93 and keep my foot out of it.Rocky we missed that completely & that is if it is pinging it'll take alot more than a gallon so I'd suggest if pinging is a prob & you 're not wanting to just experiment to use however much percentage is needed as you dont want to shorten the curve and no fun keeping your foot out of it live every 24 hour block of time like it's your last day on earth

Re: Race Fuel in a street car [Re: RapidRobert] #996258 05/20/11 05:48 PM 05/20/11 05:48 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	If its pinging then yes it will help with that. But if it runs fine and no ping just putting race gas in will do nothing. It will allow you to make adjustments to get more power such as advancing the timing but just putting race gas in the tank will not give it more power. You would have to make adjustments but when you go back to pump you will have to change it back. And in cold weather race gas is much harder to start the car on. Ron

Re: Race Fuel in a street car [Re: 383man] #996259 05/20/11 06:01 PM 05/20/11 06:01 PM
Joined: Jul 2007 Posts: 2,554 Maryland wally426ci OP master
wally426ci OP master Joined: Jul 2007 Posts: 2,554 Maryland	Thanks Guys, exactly the feedback I was looking for. I was curious if it was worthwhile. I have heard that a 20% mix is good but not sure on that. I guess I will just keep on pump gas since i have no pinging issues.

Re: Race Fuel in a street car [Re: wally426ci] #996260 05/20/11 06:13 PM 05/20/11 06:13 PM
Joined: Feb 2005 Posts: 2,158 God's Country - Etowah, TN. A34 top fuel
A34 top fuel Joined: Feb 2005 Posts: 2,158 God's Country - Etowah, TN.	Quote: Thanks Guys, exactly the feedback I was looking for. I was curious if it was worthwhile. I have heard that a 20% mix is good but not sure on that. I guess I will just keep on pump gas since i have no pinging issues. What is your compression now and where is the timing set? 412 is a SB? Last edited by A34; 05/20/11 06:14 PM. God Bless America, Our Troops and Their Families ! DEO VINDICE

Re: Race Fuel in a street car [Re: A34] #996261 05/20/11 08:05 PM 05/20/11 08:05 PM
Joined: Jul 2007 Posts: 2,554 Maryland wally426ci OP master
wally426ci OP master Joined: Jul 2007 Posts: 2,554 Maryland	Yep, its a stroked 360. Honestly, i sort of gathered this motor piece by piece and am not up on the specs. Im running a 4" stroker kit, eagle rods, KB pistons, comp cam - don't have the grind memorized. stock 68 340 cast iron intake with 750 edelbrock. Runs great, but i never degreed the cam or anything so whenever the next time i rebuild my car - I will be stripping this down and going through everything to make sure it is all good.

Re: Race Fuel in a street car [Re: wally426ci] #996262 05/20/11 08:25 PM 05/20/11 08:25 PM
Joined: Jul 2005 Posts: 11,632 SHELBY TWP,,MICHIGAN 72N96RR I LOVE WEDGIES
72N96RR I LOVE WEDGIES Joined: Jul 2005 Posts: 11,632 SHELBY TWP,,MICHIGAN	I used to run it 50/50 in my Harley..Clean burning and really livened up the bike.. A gallon will make zero diff in your car...try 4 gallons in a 16 gallon mix.. 1972 Road Runner / GTX 440 4spd Dana 3.54 Just about to turn 26K original miles.. A boat, a GMC truck, some Craftsman Tools, LOTS of Zombie Protection, and a few Goldfish.. If you love someone set them free.. If they come back it means nobody else wanted them either..!!

Re: Race Fuel in a street car [Re: 72N96RR] #996263 05/20/11 08:39 PM 05/20/11 08:39 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	My Moped has a 1/2 gal tank. I should go over to Ernies' & buy a quart of 110 race gas live every 24 hour block of time like it's your last day on earth

Re: Race Fuel in a street car [Re: 72N96RR] #996264 05/20/11 10:05 PM 05/20/11 10:05 PM
Joined: Feb 2005 Posts: 2,158 God's Country - Etowah, TN. A34 top fuel
A34 top fuel Joined: Feb 2005 Posts: 2,158 God's Country - Etowah, TN.	Quote: I used to run it 50/50 in my Harley..Clean burning and really livened up the bike.. A gallon will make zero diff in your car...try 4 gallons in a 16 gallon mix.. If that doesn't help, go to a 3:1 ratio. God Bless America, Our Troops and Their Families ! DEO VINDICE

Re: Race Fuel in a street car [Re: 383man] #996265 05/20/11 10:29 PM 05/20/11 10:29 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	Quote: If its pinging then yes it will help with that. But if it runs fine and no ping just putting race gas in will do nothing. It will allow you to make adjustments to get more power such as advancing the timing but just putting race gas in the tank will not give it more power. You would have to make adjustments but when you go back to pump you will have to change it back. And in cold weather race gas is much harder to start the car on. Ron best answer so far! and I didn't know high octane was hard to start in cold weather. If anything, you want the lowest octane the engine will run on without pinging for maximum performance. Octane has a cooling effect in the combustion chamber, and for maximum hp I think you want the chamber as hot as possible without pinging. If I'm correct (), more octane than the engine needs could actually lower your HP. Last edited by GO_Fish; 05/20/11 10:35 PM. Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

Re: Race Fuel in a street car [Re: GO_Fish] #996266 05/20/11 10:49 PM 05/20/11 10:49 PM
Joined: Jul 2008 Posts: 30,424 Florida STAYcation dOc ! The village idiot's idiot
dOc ! The village idiot's idiot Joined: Jul 2008 Posts: 30,424 Florida STAYcation	TOOOOO much octane can actually slow the car down.

Re: Race Fuel in a street car [Re: dOc !] #996267 05/22/11 07:54 AM 05/22/11 07:54 AM
Joined: Sep 2006 Posts: 277 Palmyra, NY 6 63stabamatic enthusiast
63stabamatic enthusiast 6 Joined: Sep 2006 Posts: 277 Palmyra, NY	I have a 440 that's 10.25:1. I run 50/50 mix with 100/93, works and smells great! I run 93 in the GTX with 9.7:1. The 100 I just bought was $7/gal!

Re: Race Fuel in a street car [Re: 63stabamatic] #996268 05/25/11 03:29 PM 05/25/11 03:29 PM
Joined: Nov 2009 Posts: 61 Brighton, MI, USA kb73rr member
kb73rr member Joined: Nov 2009 Posts: 61 Brighton, MI, USA	The local community airport has 100/110LL av-gas. It's pure gasoline with 0% ethanol or mtbe. It runs in $6.00/gal range (here now) so 5 gallons costs like an extra $10. Bring your own can. If they ask for a tail number (N-number) you can make up any three digits or tell them it's for an ultralight (they have no N-number). Or you can do what I do, glance at your RR with a stupid grin. Take your rocket fuel home, add it to a half tank of 93, crank the timing ahead about 5-10 degrees and have fun. Disclaimer - destroys catalytic converters and O2 sensors and legal for off-road use only. 1973 Road Runner 2006 Grand Cherokee http://www.muskie-lures.com/73roadrunner/index1.htm "An entrance ramp is a terrible thing to waste"

Re: Race Fuel in a street car [Re: kb73rr] #996269 05/25/11 03:45 PM 05/25/11 03:45 PM
Joined: May 2008 Posts: 298 CA D David Lee enthusiast
David Lee enthusiast D Joined: May 2008 Posts: 298 CA	av gas is not pure gasoline that is a myth that is old as I can think of. IT has a much higher lead content. The main petroleum component used in blending avgas is alkylate, which is essentially a mixture of various isooctanes, and some refineries also use some reformate. Avgas has a density of 6.02 lb/U.S. gal at 15 �C, or 0.721 kg/l, and this density is commonly used for weight and balance computation. Density increases to 6.40 lb/US gallon at -40 �C, and decreases by about 0.5% per 5 �C (9 �F) increase in temperature.[1] Avgas has an emission coefficient (or factor) of 18.355 pounds CO2 per U.S. gallon (2.1994 kg/l)[2][3] or about 3.05 units of weight CO2 produced per unit weight of fuel used. Avgas has a lower and more uniform vapor pressure than automotive gasoline, which keeps it in the liquid state at high-altitude, preventing vapor lock. Buy real race like c112. I run in it my stocker and it has a real distictive smell to it. But beware you can get heavilly fined running race gas in your car. It has lead in it and the federal road taxes have not been paid on it. Ah...so many pedestrians, so little time...

Re: Race Fuel in a street car [Re: David Lee] #996270 05/25/11 05:23 PM 05/25/11 05:23 PM
Joined: Jun 2004 Posts: 893 Tustin, CA P pishta super stock
pishta super stock P Joined: Jun 2004 Posts: 893 Tustin, CA	Higher octane gas actually has a lower power output if measuring them side by side. High octane helps in pre-ignition with high CR motors and runs cooler, great in a radial motor, not so great in a V. I think RR/Merlin motors on takeoff had water injection and 50 PSI of manifold boost and liked about 130 octane. Did you know CNG has 130 octane? Gets you thinking about a 14.5:1 street motor on the fart that you can drive in the CA carpool lane!

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