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110/90 mix |
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BassBoat
AMC Addicted Joined: Aug/29/2008 Status: Offline Points: 1714 |
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Posted: Apr/08/2023 at 4:40pm |
A couple things. Lead response, the increase in octane per gram per gallon of lead is not linear. It doesn't take a lot of lead to increase the octane of unleaded premium a lot. It is not arithmetic. Lead response varies depending on the base fuel. Lucky that the lead response of catalytically cracked fuel is high. Also lucky that cat cracking is how we get high-ish octane fuel without lead. Typical race gas, the 110-112 stuff has 4 grams per gallon of lead. If you mix 1 gallon of race gas with 4 gallons of unleaded 93, you will end up about 100 octane.
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WhatISit
AMC Addicted Joined: Aug/07/2017 Location: Phoenix, AZ Status: Offline Points: 0 |
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Have you tried the VP Racing Fuels Octanium? It's a lead free additive that boosts 10 gallons of gas an actual 7 octane points. If you're running 93 but only need maybe 94/95, you could use a maybe 1/3 of the can for each full tank. One can costs $25. Seems like a pretty good option.
https://vpracingfuels.com/product/octanium-unleaded/?c=207& |
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hacksaw1971
Supporter of TheAMCForum Joined: Feb/11/2020 Location: hopewell Status: Offline Points: 1364 |
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il find out when i get some this weekend. if ya can't run leaded in ya old stuff. kinda makes me wonder whats in that lead additive at auto zone..... and i have tryed the race gass stuff... it made no diff in my charger. |
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its the little things that make the biggest difference
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garland performce
AMC Apprentice Joined: Nov/19/2013 Location: sibley mo Status: Offline Points: 172 |
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Yes thanks I changed it
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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X2 on what BU1 said. I've never seen unleaded av fuel. It may exist but who knows where... BTW, don't let the fuel police see you putting leaded fuel in your street driven car. It is against the law and carries a pretty hefty fine. I'm not sure how it affects race cars. Below is something I found on the web that states it quite eloquently. It's no longer legal to put leaded gas in your car
though, whether it's a classic or not. Don't even think about trying to
do it on the downlow either. If you're found to be driving a car with
leaded gas in the tank, you could well wind up slapped with a hefty
$10,000 fine for your ingenuity.
Edited by White70JavelinSST - Mar/22/2023 at 5:20pm |
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70 Javelin SST, second owner, purchased 1972
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BU1
AMC Addicted Joined: Aug/11/2016 Location: MN Status: Offline Points: 1973 |
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Are you sure about the unleaded part???? Right now I think unleaded aviation fuels are scarce. 100LL (low lead) is the most common av fuel.
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AMO #2726
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642 #2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959 |
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Online Points: 7903 |
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5787 |
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Except you need to divide by 10 not 5 or you will have 200 octane.
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I've finally given up drinking for good...........now I only drink for evil.
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hacksaw1971
Supporter of TheAMCForum Joined: Feb/11/2020 Location: hopewell Status: Offline Points: 1364 |
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thats what i was looking for ... thanks.
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its the little things that make the biggest difference
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garland performce
AMC Apprentice Joined: Nov/19/2013 Location: sibley mo Status: Offline Points: 172 |
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110 x 5 =550 90x5 =450 550 +450 =1000 divided by 10 = 100 octane
Also might look at a additive Called Race Gas have used it in several cars and have used it on the Dyno
Edited by garland performce - Mar/22/2023 at 6:22pm |
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