There are rules in a given class governing a spec fuel. This is a normally aspirated heads up class. The only 2 Torco Fuels allowed are 118 and 118 NOS. The other fuels allowed are C14, C14+ and C25.
In one of my engines I've had some detonation issues with C25. I'm considering the use of 118 Torco, and even the 118 NOS.
Torco is telling me their NOS would make the most power but honestly they don't seem to be very technical in their discussion.
Any experienced users of this fuel out there?
Any Torco Race fuel users here? Specifically 118 and 118NOS
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does the c25 detonate worse than c14? havent run the c25 yet (or torco 118), just wondering if it is worth switching to...
i know c14 is 114 motor octane, c25 is 113. the c14+ is 115 but seems to burn too slow with its higher octane. C14 and c14+ seem to detonate the same. The c25 has a much lower distillation curve and should burn way faster than c14, which may be good and bad. its hard to believe a fuel can have a lower curve and still have similar motor octane rating.
the 118 torco stuff is a heavier fuel, and is rated at 120 motor octane. Its dist. curve is almost the same as c14+. Based on octane, I would say this fuel would burn too slow for most N/A engines, even those set on kill. Based on the dist. curve it should burn the same as C14. I dont understand how it can have 120 motor octane with the same dist. curve as c14. ..
maybe some fuel guru can enlighten us???
i know c14 is 114 motor octane, c25 is 113. the c14+ is 115 but seems to burn too slow with its higher octane. C14 and c14+ seem to detonate the same. The c25 has a much lower distillation curve and should burn way faster than c14, which may be good and bad. its hard to believe a fuel can have a lower curve and still have similar motor octane rating.
the 118 torco stuff is a heavier fuel, and is rated at 120 motor octane. Its dist. curve is almost the same as c14+. Based on octane, I would say this fuel would burn too slow for most N/A engines, even those set on kill. Based on the dist. curve it should burn the same as C14. I dont understand how it can have 120 motor octane with the same dist. curve as c14. ..
maybe some fuel guru can enlighten us???
Exactly my thoughts Duane. There's more to the fuel than what we see in numbers. Obviously there is something in C25, other than what shows up in an octane rating that allows 113 octane fuel to be resistant to detonation like a higher octane, yet have a faster burn rate.... obviously proprietary, and they are not shy about pricing it.
Again I haven't had much luck talking with Torco other than them saying I should run XX fuel...
From what I understand though the close mon and ron numbers indicate a more stable fuel for a high rpm engine....
Also consider VPC46 which has an octane rating of 98..... and I know it's been used in engines with as high as 17:1..... with a distillation curve starting at 114 degrees....!!!
C25's curve is pretty interesting.
10% evap @ 127.5°F
50% evap @ 163.2°F
90% evap @ 210.3°F
E.P. @ 221.9°F
With the BTU of C25 and it's distillation I don't see how anything short of an oxygenated fuel can compete with it for an n/a engine.
Again I haven't had much luck talking with Torco other than them saying I should run XX fuel...
From what I understand though the close mon and ron numbers indicate a more stable fuel for a high rpm engine....
Also consider VPC46 which has an octane rating of 98..... and I know it's been used in engines with as high as 17:1..... with a distillation curve starting at 114 degrees....!!!
C25's curve is pretty interesting.
10% evap @ 127.5°F
50% evap @ 163.2°F
90% evap @ 210.3°F
E.P. @ 221.9°F
With the BTU of C25 and it's distillation I don't see how anything short of an oxygenated fuel can compete with it for an n/a engine.
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