Liquid Octane boost suggestions!

[danc30]

I agree with Klotz being somewhat helpful. Put mine right on the money if you ask me. I add a whole can when I fill up. 16 oz Klotz to about 10-12 gallons of fuel.

It also stabilizes ethanol enriched gas and acts as a fuel preservative for storage.

Besides, it smells really good coming out of the sidepipes!!!!!

[SPF1061]

My Roush 427R tends to run on when I switch the key off. This running 93 octane and 34 degree total advance. Adding 3 gallons or so of 110 octane to a 17.5 gallon tank of fuel corrects the issue. Non scientific, real world results. FWIW.

[Slick61]

My KCR 427W has 612 hp, & a pretty snotty cam in it. I always run premium (91 octane in Cali) but occasionally have problems with dieseling (run-on). I dump a bottle of the cheapest octane boost I can find (typically Gumout octane boost at Walmart) with each fillup... seems to help. I don't expect any performance enhancement, but it does seem to help with the dieseling in hot weather. I realize it may be purely psychological, which is why I don't invest a whole lost of money in it.

[WardL]

Using K&S leaded 110 racing fuel or Toluene is not the same as a can of additive. I would expect your high compression Cobra to run better on the racing fuel. I wouldn't run pure Toluene in my $10-$20k engine. Pure Toluene does not have the proper light components for easy starting and smooth acceleration. I expect a little Toluene would be fine, but not 100%. Funny thing is when they blend racing fuel it is blended to suit a specific engine size and type. Most racing fuels today have alcohols. Pure Ethanol is like 120 octane and NASCAR fuel is 15% ethanol. E85 is about 100 octane. But this is really a different topic.

[DAVID GAGNARD]

I have a chart somewhere that shows the mixing rates of different octanes......naturally,I can't find it right now.......
I never ran pure toluene and wouldn't recommend it,I used it to increase the octane of pump gas and if my memory is correct, one gallon to 5 gallons of 93 octane pump gas would give an octane rating of around 96.5.........

BTW: toluene is what the oil refineries use to adjust the octane of a batch of gas when it is made/tested.......

David

[DAVID GAGNARD]

found the chart,here it is.......
this is for mixing one gallon of fuel on the left side of the chart with pump gas.......


Octane Mixing

Octane Mixing Ratios
Gallons of 92 octane fuel to which 1 gallon of race fuel has been added
Octane of race fuel 1 2 3 4 5 6 7 8 9 10 15 20 25
116 104 100 98 96 96 95.4 95 94.7 94.4 94.2 93.5 93.1 92.9
112 102 98.7 97 96 95.3 94.9 94.5 94.2 94 93.8 93.3 93 92.8
110 101 98 96.5 95.6 95 94.6 94.3 94 93.8 93.6 93.1 92.9 92.7
108 100 97.3 96 95.2 94.7 94.3 94 93.8 93.6 93.5 93 92.8 92.6
106 99 96.7 95.5 94.8 94.3 94 93.8 93.6 93.4 93.3 92.9 92.7 92.5
104 98 96 95 94.4 94 93.7 93.5 93.3 93.2 93.1 92.8 92.6 92.5
102 97 96.3 94.5 94 93.7 93.4 93.3 93.1 93 92.9 92.6 92.5 92.4
100 96 94.7 94 93.6 93.3 93.1 93 92.9 92.8 92.7 92.5 92.4 92.3
99 95.5 94.3 93.8 93.4 93.2 93 92.9 92.8 92.7 92.6 92.4 92.3 92.3
Resultant octane of mixture

go to this site,it's easier to read:

http://www.gnttype.org/techarea/misc/Octanemix.html