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110/90 mix

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BassBoat View Drop Down
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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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Post Options Post Options   Thanks (0) Thanks(0)   Quote WhatISit Quote  Post ReplyReply Direct Link To This Post Posted: Mar/28/2023 at 11:27pm
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote hacksaw1971 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/24/2023 at 3:55am
Originally posted by White70JavelinSST White70JavelinSST wrote:

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.
 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. 

its the little things that make the biggest difference
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Post Options Post Options   Thanks (0) Thanks(0)   Quote garland performce Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2023 at 6:23pm
Yes thanks I changed it
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Post Options Post Options   Thanks (1) Thanks(1)   Quote White70JavelinSST Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2023 at 5:18pm
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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Post Options Post Options   Thanks (1) Thanks(1)   Quote BU1 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2023 at 9:07am
Originally posted by hacksaw1971 hacksaw1971 wrote:

 i live 15 miles from a small airport and forgot all about 100 octane avgas. going to try that next. it unleaded but has no corn in it...


 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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Post Options Post Options   Thanks (1) Thanks(1)   Quote Sonic Silver Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2023 at 8:30am
Originally posted by WesternRed WesternRed wrote:

Except you need to divide by 10 not 5 or you will have 200 octane.
As a former math major in college, I assumed it was new math.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2023 at 12:12am
Except you need to divide by 10 not 5 or you will have 200 octane.
I've finally given up drinking for good...........now I only drink for evil.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hacksaw1971 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/21/2023 at 8:37pm
Originally posted by garland performce garland performce wrote:

110 x 5 =550 90x5 =450         550 +450 =1000 divided by 5 = 100 octane
Also might look at a additive Called Race Gas have used it in several cars and have used it on the Dyno
 thats what i was looking for ...  thanks.
its the little things that make the biggest difference
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Post Options Post Options   Thanks (1) Thanks(1)   Quote garland performce Quote  Post ReplyReply Direct Link To This Post Posted: Mar/21/2023 at 6:20pm
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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