fuel question

[risen400]

i have a 4oo with 440 kit. a little head work, stock carb with jet kit, i am drag racing and want to know the best fuel i should run.

[jersey devil]

Originally posted by risen400
i have a 4oo with 440 kit. a little head work, stock carb with jet kit, i am drag racing and want to know the best fuel i should run.

What kind of compression you running?

[risen400]

12 and 1/2 : 1 compresion

[jersey devil]

With 12:5 to 1 you have to run race gas.Some will say you may get by with 93 octane (hi test) but you will be taking a chance.Go with race gas to be on the safe side.

[Beaudacious]

i second that any dynamic compression pressure over 195psi needs at least 104 octane

[rooster300ex]

i would just run a 50/50 mix of 91 or 93 with some 110. It doesn't have to be exactly 50/50. The trx450r has 12:1 compression. It calls for premium 91 or 93

[GPracer2500]

Originally posted by rooster300ex
The trx450r has 12:1 compression. It calls for premium 91 or 93

Apples and oranges.

[jersey devil]

Originally posted by rooster300ex
i would just run a 50/50 mix of 91 or 93 with some 110. It doesn't have to be exactly 50/50. The trx450r has 12:1 compression. It calls for premium 91 or 93

Man said 12:5 to 1..not 12 to 1.there is a difference.As the man said apples and oranges???

[AZ440ex]

Originally posted by jersey devil
Man said 12:5 to 1..not 12 to 1.there is a difference.As the man said apples and oranges???

Not to mention the 450 is water cooled letting you get away with less octane.

I run 110 in my 11:1 440, just to be on the safe side. Check out any local bulk fuel distributers. Union Distributing sells shell 110 for about 6-7 bucks by the gallon.

[Sanddraging28]

i run straight 112 in my 500ex that i drag race, with a nitropropane/koolinal additive.
in my 13 to 1 426 i run straight 110 VP

just my $.02 :D