Torco to Fuel ratio
Team Owner
Joined: May 1999
Posts: 34,551
Likes: 505
From: Auburn Hills MI
What octane rating do you want?
Its a simple formula. I used to use Xylene and add that to my gas tank to make higher octane gas on my turbo car.
Xylene is 117 octane, my local station had 93.
I used 10 gallons of 93 and 3 gallons of 117.
10x93= 930
3x117= 351
930+351 = 1281
1281 / 13(Total Gallons) = 98.5 Octane
Just multiply the gallons x octane rating, add the two together and divide by the total number of gallons.
If your using Xylene or Toulene(114 octane) you can only mix 30 percent. If your using Racing Fuel you can use any amount you want to get the desired rating.
Good Luck
Its a simple formula. I used to use Xylene and add that to my gas tank to make higher octane gas on my turbo car.
Xylene is 117 octane, my local station had 93.
I used 10 gallons of 93 and 3 gallons of 117.
10x93= 930
3x117= 351
930+351 = 1281
1281 / 13(Total Gallons) = 98.5 Octane
Just multiply the gallons x octane rating, add the two together and divide by the total number of gallons.
If your using Xylene or Toulene(114 octane) you can only mix 30 percent. If your using Racing Fuel you can use any amount you want to get the desired rating.
Good Luck
Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
I add 1 quart to a tank, which should yield about 94 Octane. Based on a lab report from Joel (Torco Distributor) .
Last edited by wallstAL; Jun 26, 2005 at 02:23 PM.
Team Owner
Joined: May 1999
Posts: 34,551
Likes: 505
From: Auburn Hills MI
What rating is Torco?
If you have an 18 gallon tank and can only buy 91 octane, if you put in 17.5 gallons of 91 you end up with 1592.5.
Even if the Torco your buying is 120 octane, add another 60 points and divide that by a total of 18 you'd only get 91.805 octane.
If he actually sent some fuel away for testing and it came back at 94 octane with only a quart then I would say the gas station started with higher than 91.
I'm assuming 91 since your in CA and I think thats all that is available.
You don't always get what the sign says, they may sell higher grade fuel at the lower numbers because of delivery problems or whatever.
Better to follow a formula that will give a consistent result regardless of your starting baseline.
Especially if your running higher octane fuel for a reason, N20/FI, high compression motor.
You also tend to 'lose' octane over time. Sunoco 94 is great the day you buy it, in 3-4 days its lost 2-3 points. Every gas company used a different method to boost their octane, alot of those additives evaporate and the octane ratings drop.
If you have an 18 gallon tank and can only buy 91 octane, if you put in 17.5 gallons of 91 you end up with 1592.5.
Even if the Torco your buying is 120 octane, add another 60 points and divide that by a total of 18 you'd only get 91.805 octane.
If he actually sent some fuel away for testing and it came back at 94 octane with only a quart then I would say the gas station started with higher than 91.
I'm assuming 91 since your in CA and I think thats all that is available.
You don't always get what the sign says, they may sell higher grade fuel at the lower numbers because of delivery problems or whatever.
Better to follow a formula that will give a consistent result regardless of your starting baseline.
Especially if your running higher octane fuel for a reason, N20/FI, high compression motor.
You also tend to 'lose' octane over time. Sunoco 94 is great the day you buy it, in 3-4 days its lost 2-3 points. Every gas company used a different method to boost their octane, alot of those additives evaporate and the octane ratings drop.
Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
All I can really say is that the car was easy to tune. I have no detonation, pinging, miss fires and all the associated things that are connected with 91 Octane on a high compression engine. 
Race Director
Joined: Nov 2000
Posts: 11,221
Likes: 899
From: CA
2017 C5 of the Year Finalist
St. Jude Donor '08
Originally Posted by wallstAL
All I can really say is that the car was easy to tune. I have no detonation, pinging, miss fires and all the associated things that are connected with 91 Octane on a high compression engine.
Thanks for stepping in Al!!!
I took 10 Gallons of Chevron 91 octane gas, and mixed it with 1 quart can of Torco. I then sent a sample of that to Saybolt LP in Carson for testing.
The results were 96.5 octane.
See sheet here:
http://www.jbsblownc5.net/html/torco1.html
As stated before, Torco is one very cost effective and convenient way to consistantly raise your octane.
One quart can of Torco Race fuel concentrate, is a lot easier to carry around then a 5 gallon pail of paint thinner.
JB
Team Owner
Joined: May 1999
Posts: 34,551
Likes: 505
From: Auburn Hills MI
Ah...well see he never said Torco Concentrate.
I assumed he meant Torco Racing Fuels. I've heard of the additive, comes in a black can right?
Never saw it before, but they sell Torco racing fuel at the corner gas station.
But hey, its always interesting to see the look on the guys face when you tell him what you plan on doing with 5 gallons of paint thinner
On the way back from Toronto with my TT Z28 I stopped at a Ace Hardware. We were pretty sure the car would run on 93, but to be safe I stepped it down from 100 octane, a little at a time and monitored it since it was tuned in 50 degree weather and it was near 90's when I picked it up.
I picked up 3 gallons of Xylene, a pair of rubber gloves, and a giant funnel. He wasn't going to sell it to me saying no one needed 3 gallons of paint thinner. I had to explain to him a few times what I was doing with it to the point of telling him get in the car and you can goto the gas station next door and watch me put it in the car.
Middle of no where and no place to get race gas, after some work he let me buy it.
I was doubting that the Torco stuff works, I was just thinking fuel since he did not specify. From what I've been told its the only one on the market that works. Dave Inall from Incon recommended it for my Incon car many many years ago, but we could never find a source for it.
Plus 1 quart per 10 gallons is alot easier to understand than 1 quart per tank.
I assumed he meant Torco Racing Fuels. I've heard of the additive, comes in a black can right?
Never saw it before, but they sell Torco racing fuel at the corner gas station.
But hey, its always interesting to see the look on the guys face when you tell him what you plan on doing with 5 gallons of paint thinner
On the way back from Toronto with my TT Z28 I stopped at a Ace Hardware. We were pretty sure the car would run on 93, but to be safe I stepped it down from 100 octane, a little at a time and monitored it since it was tuned in 50 degree weather and it was near 90's when I picked it up.
I picked up 3 gallons of Xylene, a pair of rubber gloves, and a giant funnel. He wasn't going to sell it to me saying no one needed 3 gallons of paint thinner. I had to explain to him a few times what I was doing with it to the point of telling him get in the car and you can goto the gas station next door and watch me put it in the car.
Middle of no where and no place to get race gas, after some work he let me buy it.
I was doubting that the Torco stuff works, I was just thinking fuel since he did not specify. From what I've been told its the only one on the market that works. Dave Inall from Incon recommended it for my Incon car many many years ago, but we could never find a source for it.
Plus 1 quart per 10 gallons is alot easier to understand than 1 quart per tank.
Last edited by NoOne; Jun 26, 2005 at 06:54 PM.
Race Director
Joined: Nov 2000
Posts: 11,221
Likes: 899
From: CA
2017 C5 of the Year Finalist
St. Jude Donor '08
Originally Posted by NoOne
Ah...well see he never said Torco Concentrate.
I assumed he meant Torco Racing Fuels. I've heard of the additive, comes in a black can right?
Never saw it before, but they sell Torco racing fuel at the corner gas station.
But hey, its always interesting to see the look on the guys face when you tell him what you plan on doing with 5 gallons of paint thinner
On the way back from Toronto with my TT Z28 I stopped at a Ace Hardware. We were pretty sure the car would run on 93, but to be safe I stepped it down from 100 octane, a little at a time and monitored it since it was tuned in 50 degree weather and it was near 90's when I picked it up.
I picked up 3 gallons of Xylene, a pair of rubber gloves, and a giant funnel. He wasn't going to sell it to me saying no one needed 3 gallons of paint thinner. I had to explain to him a few times what I was doing with it to the point of telling him get in the car and you can goto the gas station next door and watch me put it in the car.
Middle of no where and no place to get race gas, after some work he let me buy it.
I was doubting that the Torco stuff works, I was just thinking fuel since he did not specify. From what I've been told its the only one on the market that works. Dave Inall from Incon recommended it for my Incon car many many years ago, but we could never find a source for it.
Plus 1 quart per 10 gallons is alot easier to understand than 1 quart per tank.
I assumed he meant Torco Racing Fuels. I've heard of the additive, comes in a black can right?
Never saw it before, but they sell Torco racing fuel at the corner gas station.
But hey, its always interesting to see the look on the guys face when you tell him what you plan on doing with 5 gallons of paint thinner
On the way back from Toronto with my TT Z28 I stopped at a Ace Hardware. We were pretty sure the car would run on 93, but to be safe I stepped it down from 100 octane, a little at a time and monitored it since it was tuned in 50 degree weather and it was near 90's when I picked it up.
I picked up 3 gallons of Xylene, a pair of rubber gloves, and a giant funnel. He wasn't going to sell it to me saying no one needed 3 gallons of paint thinner. I had to explain to him a few times what I was doing with it to the point of telling him get in the car and you can goto the gas station next door and watch me put it in the car.
Middle of no where and no place to get race gas, after some work he let me buy it.
I was doubting that the Torco stuff works, I was just thinking fuel since he did not specify. From what I've been told its the only one on the market that works. Dave Inall from Incon recommended it for my Incon car many many years ago, but we could never find a source for it.
Plus 1 quart per 10 gallons is alot easier to understand than 1 quart per tank.
That must have been too funny when you were trying to buy it from that small hardware store!!
I can also get Torco Race Fuel Concentrate in 5 gallon jugs, which will make a whole lot of high octane fuel, at a very good price!!
JB
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Team Owner
Joined: May 1999
Posts: 34,551
Likes: 505
From: Auburn Hills MI
Only did it for a few weeks.
Just slowly worked my way down from 100 octane to 93 octane while watching the knock.
I'd still pick up a gallon once in a while if I was going to the track and running it hard for insurance.
Back then no one carried Torco anywhere local.
Just slowly worked my way down from 100 octane to 93 octane while watching the knock.
I'd still pick up a gallon once in a while if I was going to the track and running it hard for insurance.
Back then no one carried Torco anywhere local.
